1
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Ando S, Tanaka K, Matsumoto M, Oyama Y, Tomabechi Y, Yamagata A, Shirouzu M, Nakagawa R, Okimoto N, Taiji M, Sato K, Ohama T. The luciferase-based in vivo protein-protein interaction assay revealed that CHK1 promotes PP2A and PME-1 interaction. J Biol Chem 2024; 300:107277. [PMID: 38588804 PMCID: PMC11098961 DOI: 10.1016/j.jbc.2024.107277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 03/12/2024] [Accepted: 04/02/2024] [Indexed: 04/10/2024] Open
Abstract
Protein phosphatase 2A (PP2A) is an essential serine/threonine protein phosphatase, and its dysfunction is involved in the onset of cancer and neurodegenerative disorders. PP2A functions as a trimeric holoenzyme whose composition is regulated by the methyl-esterification (methylation) of the PP2A catalytic subunit (PP2Ac). Protein phosphatase methylesterase-1 (PME-1) is the sole PP2Ac methylesterase, and the higher PME-1 expression is observed in various cancer and neurodegenerative diseases. Apart from serving as a methylesterase, PME-1 acts as a PP2A inhibitory protein, binding directly to PP2Ac and suppressing its activity. The intricate function of PME-1 hinders drug development by targeting the PME-1/PP2Ac axis. This study applied the NanoBiT system, a bioluminescence-based protein interaction assay, to elucidate the molecular mechanism that modulates unknown PME-1/PP2Ac protein-protein interaction (PPI). Compound screening identified that the CHK1 inhibitors inhibited PME-1/PP2Ac association without affecting PP2Ac methylation levels. CHK1 directly phosphorylates PP2Ac to promote PME-1 association. Phospho-mass spectrometry identified multiple phospho-sites on PP2Ac, including the Thr219, that affect PME-1 interaction. An anti-phospho-Thr219 PP2Ac antibody was generated and showed that CHK1 regulates the phosphorylation levels of this site in cells. On the contrary, in vitro phosphatase assay showed that CHK1 is the substrate of PP2A, and PME-1 hindered PP2A-mediated dephosphorylation of CHK1. Our data provides novel insights into the molecular mechanisms governing the PME-1/PP2Ac PPI and the triad relationship between PP2A, PME-1, and CHK1.
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Affiliation(s)
- Sana Ando
- Laboratory of Veterinary Pharmacology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Keiko Tanaka
- Laboratory of Veterinary Pharmacology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Maharu Matsumoto
- Laboratory of Veterinary Pharmacology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Yuki Oyama
- Laboratory of Veterinary Pharmacology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Yuri Tomabechi
- Laboratory for Protein Functional and Structural Biology, RIKEN Center for Biosystems Dynamics Research, Yokohama, Kanagawa, Japan
| | - Atsushi Yamagata
- Laboratory for Protein Functional and Structural Biology, RIKEN Center for Biosystems Dynamics Research, Yokohama, Kanagawa, Japan
| | - Mikako Shirouzu
- Laboratory for Protein Functional and Structural Biology, RIKEN Center for Biosystems Dynamics Research, Yokohama, Kanagawa, Japan
| | - Reiko Nakagawa
- Laboratory for Cell-Free Protein Synthesis, RIKEN Center for Biosystems Dynamics Research, Kobe, Hyogo, Japan
| | - Noriaki Okimoto
- Laboratory for Computational Molecular Design, RIKEN Center for Biosystems Dynamics Research (BDR), Osaka, Japan; Drug Discovery Molecular Simulation Platform Unit, RIKEN Center for Biosystems Dynamics Research (BDR), Osaka, Japan
| | - Makoto Taiji
- Laboratory for Computational Molecular Design, RIKEN Center for Biosystems Dynamics Research (BDR), Osaka, Japan; Drug Discovery Molecular Simulation Platform Unit, RIKEN Center for Biosystems Dynamics Research (BDR), Osaka, Japan
| | - Koichi Sato
- Laboratory of Veterinary Pharmacology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan; Research Institute for Cell Design Medical Science, Yamaguchi University, Yamaguchi, Japan
| | - Takashi Ohama
- Laboratory of Veterinary Pharmacology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan; Research Institute for Cell Design Medical Science, Yamaguchi University, Yamaguchi, Japan.
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2
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Qian J, Peng M, Li Y, Liu W, Zou X, Chen H, Zhou S, Xiao S, Zhou J. Case report: A germline CHEK1 c.613 + 2T>C leads to a splicing error in a family with multiple cancer patients. Front Oncol 2024; 14:1380093. [PMID: 38686193 PMCID: PMC11056527 DOI: 10.3389/fonc.2024.1380093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Accepted: 03/21/2024] [Indexed: 05/02/2024] Open
Abstract
Background Genome instability plays a crucial role in promoting tumor development. Germline mutations in genes responsible for DNA repair are often associated with familial cancer syndromes. A noticeable exception is the CHEK1 gene. Despite its well-established role in homologous recombination, germline mutations in CHEK1 are rarely reported. Case presentation In this report, we present a patient diagnosed with ovarian clear cell carcinoma who has a family history of cancer. Her relatives include a grandfather with esophageal cancer, a father with gastric cancer, and an uncle with a brain tumor. The patient carried a typical genomic profile of clear cell carcinoma including mutations in KRAS, PPP2R1A, and PIK3R1. Importantly, her paired peripheral blood cells harbored a germline CHEK1 mutation, CHEK1 exon 6 c.613 + 2T>C, which was also found in her father. Unfortunately, the CHEK1 status of her grandfather and uncle remains unknown due to the unavailability of their specimens. Further evaluation via RT-PCR confirmed a splicing error in the CHEK1 gene, resulting in truncation at the kinase domain region, indicative of a loss-of-function mutation. Conclusion This case highlights a rare germline CHEK1 mutation within a family with a history of cancer. The confirmed splicing error at the mRNA level underscores the functional consequences of this mutation. Documenting such cases is vital for future evaluation of inheritance patterns, clinical penetrance of the mutation, and its association with specific cancer types.
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Affiliation(s)
- Jun Qian
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Min Peng
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Yanan Li
- Molecular Genetics Laboratory, Suzhou Sano Precision Medicine Ltd., Suzhou, China
| | - Wei Liu
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Xinwei Zou
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Huafei Chen
- Molecular Genetics Laboratory, Suzhou Sano Precision Medicine Ltd., Suzhou, China
| | - Sujuan Zhou
- Molecular Genetics Laboratory, Suzhou Sano Precision Medicine Ltd., Suzhou, China
| | - Sheng Xiao
- Department of Pathology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, United States
| | - Jinhua Zhou
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Soochow University, Suzhou, China
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3
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Knoblochova L, Duricek T, Vaskovicova M, Zorzompokou C, Rayova D, Ferencova I, Baran V, Schultz RM, Hoffmann ER, Drutovic D. CHK1-CDC25A-CDK1 regulate cell cycle progression and protect genome integrity in early mouse embryos. EMBO Rep 2023; 24:e56530. [PMID: 37694680 PMCID: PMC10561370 DOI: 10.15252/embr.202256530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 08/17/2023] [Accepted: 08/18/2023] [Indexed: 09/12/2023] Open
Abstract
After fertilization, remodeling of the oocyte and sperm genomes is essential to convert these highly differentiated and transcriptionally quiescent cells into early cleavage-stage blastomeres that are transcriptionally active and totipotent. This developmental transition is accompanied by cell cycle adaptation, such as lengthening or shortening of the gap phases G1 and G2. However, regulation of these cell cycle changes is poorly understood, especially in mammals. Checkpoint kinase 1 (CHK1) is a protein kinase that regulates cell cycle progression in somatic cells. Here, we show that CHK1 regulates cell cycle progression in early mouse embryos by restraining CDK1 kinase activity due to CDC25A phosphatase degradation. CHK1 kinase also ensures the long G2 phase needed for genome activation and reprogramming gene expression in two-cell stage mouse embryos. Finally, Chk1 depletion leads to DNA damage and chromosome segregation errors that result in aneuploidy and infertility.
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Affiliation(s)
- Lucie Knoblochova
- Institute of Animal Physiology and Genetics of the Czech Academy of SciencesLibechovCzech Republic
- Faculty of ScienceCharles UniversityPragueCzech Republic
| | - Tomas Duricek
- Institute of Animal Physiology and Genetics of the Czech Academy of SciencesLibechovCzech Republic
| | - Michaela Vaskovicova
- Institute of Animal Physiology and Genetics of the Czech Academy of SciencesLibechovCzech Republic
| | - Chrysoula Zorzompokou
- Institute of Animal Physiology and Genetics of the Czech Academy of SciencesLibechovCzech Republic
| | - Diana Rayova
- Institute of Animal Physiology and Genetics of the Czech Academy of SciencesLibechovCzech Republic
| | - Ivana Ferencova
- Institute of Animal Physiology and Genetics of the Czech Academy of SciencesLibechovCzech Republic
| | - Vladimir Baran
- Institute of Animal Physiology, Centre of Biosciences, Slovak Academy of SciencesKosiceSlovakia
| | - Richard M Schultz
- Department of BiologyUniversity of PennsylvaniaPhiladelphiaPAUSA
- Department of Anatomy, Physiology, and Cell Biology, School of Veterinary MedicineUniversity of CaliforniaDavisCAUSA
| | - Eva R Hoffmann
- DNRF Center for Chromosome Stability, Department of Cellular and Molecular Medicine, Faculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark
| | - David Drutovic
- Institute of Animal Physiology and Genetics of the Czech Academy of SciencesLibechovCzech Republic
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Baran V, Mayer A. Checkpoint Kinase 1 Is a Key Signal Transducer of DNA Damage in the Early Mammalian Cleavage Embryo. Int J Mol Sci 2023; 24:ijms24076778. [PMID: 37047751 PMCID: PMC10095474 DOI: 10.3390/ijms24076778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 03/01/2023] [Accepted: 04/04/2023] [Indexed: 04/14/2023] Open
Abstract
After fertilization, remodeling of the oocyte and sperm genome is essential for the successful initiation of mitotic activity in the fertilized oocyte and subsequent proliferative activity of the early embryo. Despite the fact that the molecular mechanisms of cell cycle control in early mammalian embryos are in principle comparable to those in somatic cells, there are differences resulting from the specific nature of the gene totipotency of the blastomeres of early cleavage embryos. In this review, we focus on the Chk1 kinase as a key transduction factor in monitoring the integrity of DNA molecules during early embryogenesis.
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Affiliation(s)
- Vladimír Baran
- Institute of Animal Physiology, Centre of Biosciences, Slovak Academy of Sciences, Šoltésovej 4, 040 00 Košice, Slovakia
| | - Alexandra Mayer
- Department of Obstetrics and Gynecology, First Faculty of Medicine, Charles University, 12000 Prague, Czech Republic
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5
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Liu XM, Chen F, Zhang F, Xi HT, Zhao JZ. Knockdown of Chk1 inhibits proliferation and promotes apoptosis in mouse granulosa cells and its regulation mechanism by miR-15a and miR-16. In Vitro Cell Dev Biol Anim 2022; 58:579-586. [PMID: 35915338 DOI: 10.1007/s11626-022-00705-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 06/26/2022] [Indexed: 11/05/2022]
Abstract
Checkpoint kinase 1 (Chk1) is a protein kinase which preserves the genome integrity, and works as an evolutionally conserved DNA damage response and cell cycle checkpoint. However, the functional roles and regulatory mechanism of Chk1 in mouse granulosa cells (GCs) have not been fully elucidated. In this study, by RNA interfering, Chk1 gene was knocked down in GCs. Knockdown of Chk1 inhibited proliferation and increased apoptosis of GCs (p < 0.05), respectively; in addition, cell cycle of GCs was arrested at S and G2/M phases. Further qRT-PCR results showed that cell cycle factors (Cyclin B1 and Cyclin D 1) and a marker gene of proliferation (PCNA) were downregulated (p < 0.001), while apoptotic factors (p53b, p21, caspase-3, and Bax) were upregulated (p < 0.01), which suggested that knockdown of Chk1 may inhibit proliferation, regulate cell cycle, and promote apoptosis at the transcriptional level in GCs. In vitro studies showed a negative correlation between Chk1 mRNA and miR-16 expression during follicular development. To elucidate the relationship between Chk1 and miR-15a/16, luciferase reporter plasmids were constructed and luciferase assays revealed that both miR-15a and miR-16 could bind to the 3' UTR of Chk1 mRNA, and significantly downregulate the protein level of Chk1 (p < 0.01), while miR-16, not miR-15a, could significantly decrease the mRNA level of Chk1 (p < 0.05). This result indicated that miR-16 directly induced Chk1 mRNA destabilization, while miR-15a regulated Chk1 expression through translational repression. Taken together, this study uncovered the roles of Chk1 in mouse granulosa cells and its regulation by miR-15a and miR-16 through different mechanisms.
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Affiliation(s)
- Xiao-Ming Liu
- Reproductive Medicine Centre, Department of Obstetrics and Gynecology, the Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, People's Republic of China
| | - Fang Chen
- Laboratory Animal Centre, Wenzhou Medical University, Wenzhou, 325000, People's Republic of China
| | - Fan Zhang
- Reproductive Medicine Centre, Department of Obstetrics and Gynecology, the Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, People's Republic of China
| | - Hai-Tao Xi
- Reproductive Medicine Centre, Department of Obstetrics and Gynecology, the Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, People's Republic of China.
| | - Jun-Zhao Zhao
- Reproductive Medicine Centre, Department of Obstetrics and Gynecology, the Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, People's Republic of China.
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6
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Involvement of the PI3K/AKT Intracellular Signaling Pathway in the AntiCancer Activity of Hydroxytyrosol, a Polyphenol from Olea europaea, in Hematological Cells and Implication of HSP60 Levels in Its Anti-Inflammatory Activity. Int J Mol Sci 2022; 23:ijms23137053. [PMID: 35806065 PMCID: PMC9266908 DOI: 10.3390/ijms23137053] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 06/06/2022] [Accepted: 06/22/2022] [Indexed: 12/24/2022] Open
Abstract
Hydroxytyrosol (HT), the main representative of polyphenols of olive oil, has been described as one of the most powerful natural antioxidants, also showing anti-inflammatory, antimicrobial, cardioprotective and anticancer activity in different type of cancers, but has been little studied in hematological neoplasms. The objective of this work was to evaluate the anticancer potential of HT in acute human leukemia T cells (Jurkat and HL60) and the anti-inflammatory potential in murine macrophages (Raw264.7). For this, cytotoxicity tests were performed for HT, showing IC50 values, at 24 h, for Jurkat, HL60 and Raw264.7 cells, of 27.3 µg·mL−1, 109.8 µg·mL−1 and 45.7 µg·mL−1, respectively. At the same time, HT caused cell arrest in G0/G1 phase in both Jurkat and HL60 cells by increasing G0/G1 phase and significantly decreasing S phase. Apoptosis and cell cycle assays revealed an antiproliferative effect of HT, decreasing the percentage of dividing cells and increasing apoptosis. Furthermore, HT inhibited the PI3K signaling pathway and, consequently, the MAPK pathway was activated. Inflammation tests revealed that HT acts as an anti-inflammatory agent, reducing NO levels in Raw264.7 cells previously stimulated by lipopolysaccharide (LPS). These processes were confirmed by the changes in the expression of the main markers of inflammation and cancer. In conclusion, HT has an anticancer and anti-inflammatory effect in the cell lines studied, which were Raw264.7, Jurkat, and HL60, and could be used as a natural drug in the treatment of liquid cancers, leukemias, myelomas and lymphomas.
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7
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Baselga-Cervera B, Gettle N, Travisano M. Loss-of-heterozygosity facilitates a fitness valley crossing in experimentally evolved multicellular yeast. Proc Biol Sci 2022; 289:20212722. [PMID: 36547392 PMCID: PMC9185828 DOI: 10.1098/rspb.2021.2722] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Determining how adaptive possibilities do or do not become evolutionary realities is central to understanding the tempo and mode of evolutionary change. Some of the simplest evolutionary landscapes arise from underdominance at a single locus where the fitness valley consists of only one less-fit genotype. Despite their potential for rapid evolutionary change, few such examples have been investigated. We capitalized on an experimental system in which a significant evolutionary shift, the transition from uni-to-multicellularity, was observed in asexual diploid populations of Saccharomyces cerevisiae experimentally selected for increased settling rates. The multicellular phenotype results from recessive single-locus mutations that undergo loss-of-heterozygosity (LOH) events. By reconstructing the necessary heterozygous intermediate steps, we found that the evolution of multicellularity involves a decrease in size during the first steps. Heterozygous genotypes are 20% smaller in size than genotypes with functional alleles. Nevertheless, populations of heterozygotes give rise to multicellular genotypes more readily than unicellular genotypes with two functional alleles, by rapid LOH events. LOH drives adaptation that may enable rapid evolution in diploid yeast. Together these results show discordance between the phenotypic and genotypic multicellular transition. The evolutionary path to multicellularity, and the adaptive benefits of increased size, requires initial size reductions.
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Affiliation(s)
- Beatriz Baselga-Cervera
- Department of Ecology, Evolution, and Behavior, University of Minnesota, St Paul, MN 55108, USA,Minnesota Center for Philosophy of Science, University of Minnesota, Minneapolis, MN 55455, USA
| | - Noah Gettle
- Department of Zoology, Stockholm University, Stockholm, Sweden
| | - Michael Travisano
- Department of Ecology, Evolution, and Behavior, University of Minnesota, St Paul, MN 55108, USA,The BioTechnology Institute, University of Minnesota, St Paul, MN 55108, USA,Minnesota Center for Philosophy of Science, University of Minnesota, Minneapolis, MN 55455, USA
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8
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Khan H, Alam W, Alsharif KF, Aschner M, Pervez S, Saso L. Alkaloids and Colon Cancer: Molecular Mechanisms and Therapeutic Implications for Cell Cycle Arrest. Molecules 2022; 27:molecules27030920. [PMID: 35164185 PMCID: PMC8838632 DOI: 10.3390/molecules27030920] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 01/21/2022] [Accepted: 01/25/2022] [Indexed: 12/18/2022] Open
Abstract
Cancer is the second most fatal disease worldwide, with colon cancer being the third most prevalent and fatal form of cancer in several Western countries. The risk of acquisition of resistance to chemotherapy remains a significant hurdle in the management of various types of cancer, especially colon cancer. Therefore, it is essential to develop alternative treatment modalities. Naturally occurring alkaloids have been shown to regulate various mechanistic pathways linked to cell proliferation, cell cycle, and metastasis. This review aims to shed light on the potential of alkaloids as anti-colon-cancer chemotherapy agents that can modulate or arrest the cell cycle. Preclinical investigated alkaloids have shown anti-colon cancer activities and inhibition of cancer cell proliferation via cell cycle arrest at different stages, suggesting that alkaloids may have the potential to act as anticancer molecules.
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Affiliation(s)
- Haroon Khan
- Department of Pharmacy, Abdul Wali Khan University Mardan, Mardan 23200, Pakistan;
- Correspondence: or
| | - Waqas Alam
- Department of Pharmacy, Abdul Wali Khan University Mardan, Mardan 23200, Pakistan;
| | - Khalaf F. Alsharif
- Department of Clinical Laboratory, College of Applied Medical Science, Taif University, P.O. Box 11099,Taif 21944, Saudi Arabia;
| | - Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY 10461, USA;
| | - Samreen Pervez
- Department of Pharmacy, Qurtuba University of Science and Information Technology, Peshawar 29050, Pakistan;
| | - Luciano Saso
- Department of Physiology and Pharmacology “Vittorio Erspamer”, Sapienza University of Rome, 00185 Rome, Italy;
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9
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Long MJC, Ly P, Aye Y. Still no Rest for the Reductases: Ribonucleotide Reductase (RNR) Structure and Function: An Update. Subcell Biochem 2022; 99:155-197. [PMID: 36151376 DOI: 10.1007/978-3-031-00793-4_5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Herein we present a multidisciplinary discussion of ribonucleotide reductase (RNR), the essential enzyme uniquely responsible for conversion of ribonucleotides to deoxyribonucleotides. This chapter primarily presents an overview of this multifaceted and complex enzyme, covering RNR's role in enzymology, biochemistry, medicinal chemistry, and cell biology. It further focuses on RNR from mammals, whose interesting and often conflicting roles in health and disease are coming more into focus. We present pitfalls that we think have not always been dealt with by researchers in each area and further seek to unite some of the field-specific observations surrounding this enzyme. Our work is thus not intended to cover any one topic in extreme detail, but rather give what we consider to be the necessary broad grounding to understand this critical enzyme holistically. Although this is an approach we have advocated in many different areas of scientific research, there is arguably no other single enzyme that embodies the need for such broad study than RNR. Thus, we submit that RNR itself is a paradigm of interdisciplinary research that is of interest from the perspective of the generalist and the specialist alike. We hope that the discussions herein will thus be helpful to not only those wanting to tackle RNR-specific problems, but also those working on similar interdisciplinary projects centering around other enzymes.
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Affiliation(s)
- Marcus J C Long
- University of Lausanne (UNIL), Lausanne, Switzerland
- Department of Biochemistry, UNIL, Epalinges, Switzerland
| | - Phillippe Ly
- Swiss Federal Institute of Technology Lausanne (EPFL), Lausanne, Switzerland
- EPFL SB ISIC LEAGO, Lausanne, Switzerland
| | - Yimon Aye
- Swiss Federal Institute of Technology Lausanne (EPFL), Lausanne, Switzerland.
- EPFL SB ISIC LEAGO, Lausanne, Switzerland.
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10
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A catalytic-independent function of human DNA polymerase Kappa controls the stability and abundance of the Checkpoint Kinase 1. Mol Cell Biol 2021; 41:e0009021. [PMID: 34398682 DOI: 10.1128/mcb.00090-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
DNA polymerase kappa (Pol κ) has been well documented thus far for its specialized DNA synthesis activity during translesion replication, progression of replication forks through regions difficult to replicate, restart of stalled forks and replication checkpoint efficiency. Pol κ is also required for the stabilization of stalled forks although the mechanisms are poorly understood. Here we unveiled an unexpected role for Pol κ in controlling the stability and abundance of Chk1, an important actor for the replication checkpoint and fork stabilization. We found that loss of Pol κ decreased the Chk1 protein level in the nucleus of four human cell lines. Pol κ and not the other Y-family polymerase members is required to maintain the Chk1 protein pool all along the cell cycle. We showed that Pol κ depletion affected the protein stability of Chk1 and protected it from proteasome degradation. Importantly, we also observed that the fork restart defects observed in Pol κ-depleted cells could be overcome by the re-expression of Chk1. Strikingly, this new function of Pol κ does not require its catalytic activity. We propose that Pol κ could contribute to the protection of stalled forks through Chk1 stability.
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11
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Mesquita A, Glenn J, Jenny A. Differential activation of eMI by distinct forms of cellular stress. Autophagy 2021; 17:1828-1840. [PMID: 32559125 PMCID: PMC8386722 DOI: 10.1080/15548627.2020.1783833] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 06/03/2020] [Accepted: 06/08/2020] [Indexed: 12/11/2022] Open
Abstract
As one of the major, highly conserved catabolic pathways, autophagy delivers cytosolic components to lysosomes for degradation. It is essential for development, cellular homeostasis, and coping with stress. Reduced autophagy increases susceptibility to protein aggregation diseases and leads to phenotypes associated with aging. Of the three major forms of autophagy, macroautophagy (MA) can degrade organelles or aggregated proteins, and chaperone-mediated autophagy is specific for soluble proteins containing KFERQ-related targeting motifs. During endosomal microautophagy (eMI), cytoplasmic proteins are engulfed into late endosomes in an ESCRT machinery-dependent manner. eMI can be KFERQ-specific or occur in bulk and be induced by prolonged starvation. Its physiological regulation and function, however, are not understood. Here, we show that eMI in the Drosophila fat body, akin to the mammalian liver, is induced upon oxidative or genotoxic stress in an ESCRT and partially Hsc70-4-dependent manner. Interestingly, eMI activation is selective, as ER stress fails to elicit a response. Intriguingly, we find that reducing MA leads to a compensatory enhancement of eMI, suggesting a tight interplay between these degradative processes. Furthermore, we show that mutations in DNA damage response genes are sufficient to trigger eMI and that the response to oxidative stress is under the control of MAPK/JNK signaling. Our data suggest that, controlled by various signaling pathways, eMI allows an organ to react and adapt to specific types of stress and is thus likely critical to prevent disease.Abbreviations:Atg: autophagy-related; CMA: chaperone-mediated autophagy; DDR: DNA damage repair; Df: deficiency (deletion); (E)GFP: (enhanced) green fluorescent protein; eMI: endosomal microautophagy; ER: endoplasmatic reticulum; ESCRT: endosomal sorting complexes required for transport; Eto: etoposide; FLP: flipase; Hsc: heat shock cognate protein; LAMP2A: lysosomal-associated membrane protein 2A; LE: late endosome; MA: macroautophagy; MI: microautophagy; MVB: multivesicular body; PA: photoactivatable; Para: paraquat; ROS: reactive oxygen species; SEM: standard error of means; Tor: target of rapamycin [serine/threonine kinase]; UPR: unfolded protein response; Vps: vacuolar protein sorting.
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Affiliation(s)
- Ana Mesquita
- Department of Developmental and Molecular Biology, Marion Bessin Liver Research Center, Albert Einstein College of Medicine, New York, NY, US
| | - James Glenn
- Department of Developmental and Molecular Biology, Marion Bessin Liver Research Center, Albert Einstein College of Medicine, New York, NY, US
| | - Andreas Jenny
- Department of Developmental and Molecular Biology, Marion Bessin Liver Research Center, Albert Einstein College of Medicine, New York, NY, US
- Department of Genetics, Marion Bessin Liver Research Center, Albert Einstein College of Medicine, New York, NY, US
- Marion Bessin Liver Research Center, Albert Einstein College of Medicine, New York, NY, US
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Ruth KS, Day FR, Hussain J, Martínez-Marchal A, Aiken CE, Azad A, Thompson DJ, Knoblochova L, Abe H, Tarry-Adkins JL, Gonzalez JM, Fontanillas P, Claringbould A, Bakker OB, Sulem P, Walters RG, Terao C, Turon S, Horikoshi M, Lin K, Onland-Moret NC, Sankar A, Hertz EPT, Timshel PN, Shukla V, Borup R, Olsen KW, Aguilera P, Ferrer-Roda M, Huang Y, Stankovic S, Timmers PRHJ, Ahearn TU, Alizadeh BZ, Naderi E, Andrulis IL, Arnold AM, Aronson KJ, Augustinsson A, Bandinelli S, Barbieri CM, Beaumont RN, Becher H, Beckmann MW, Benonisdottir S, Bergmann S, Bochud M, Boerwinkle E, Bojesen SE, Bolla MK, Boomsma DI, Bowker N, Brody JA, Broer L, Buring JE, Campbell A, Campbell H, Castelao JE, Catamo E, Chanock SJ, Chenevix-Trench G, Ciullo M, Corre T, Couch FJ, Cox A, Crisponi L, Cross SS, Cucca F, Czene K, Smith GD, de Geus EJCN, de Mutsert R, De Vivo I, Demerath EW, Dennis J, Dunning AM, Dwek M, Eriksson M, Esko T, Fasching PA, Faul JD, Ferrucci L, Franceschini N, Frayling TM, Gago-Dominguez M, Mezzavilla M, García-Closas M, Gieger C, Giles GG, Grallert H, Gudbjartsson DF, Gudnason V, Guénel P, Haiman CA, Håkansson N, Hall P, Hayward C, He C, He W, Heiss G, Høffding MK, Hopper JL, Hottenga JJ, Hu F, Hunter D, Ikram MA, Jackson RD, Joaquim MDR, John EM, Joshi PK, Karasik D, Kardia SLR, Kartsonaki C, Karlsson R, Kitahara CM, Kolcic I, Kooperberg C, Kraft P, Kurian AW, Kutalik Z, La Bianca M, LaChance G, Langenberg C, Launer LJ, Laven JSE, Lawlor DA, Le Marchand L, Li J, Lindblom A, Lindstrom S, Lindstrom T, Linet M, Liu Y, Liu S, Luan J, Mägi R, Magnusson PKE, Mangino M, Mannermaa A, Marco B, Marten J, Martin NG, Mbarek H, McKnight B, Medland SE, Meisinger C, Meitinger T, Menni C, Metspalu A, Milani L, Milne RL, Montgomery GW, Mook-Kanamori DO, Mulas A, Mulligan AM, Murray A, Nalls MA, Newman A, Noordam R, Nutile T, Nyholt DR, Olshan AF, Olsson H, Painter JN, Patel AV, Pedersen NL, Perjakova N, Peters A, Peters U, Pharoah PDP, Polasek O, Porcu E, Psaty BM, Rahman I, Rennert G, Rennert HS, Ridker PM, Ring SM, Robino A, Rose LM, Rosendaal FR, Rossouw J, Rudan I, Rueedi R, Ruggiero D, Sala CF, Saloustros E, Sandler DP, Sanna S, Sawyer EJ, Sarnowski C, Schlessinger D, Schmidt MK, Schoemaker MJ, Schraut KE, Scott C, Shekari S, Shrikhande A, Smith AV, Smith BH, Smith JA, Sorice R, Southey MC, Spector TD, Spinelli JJ, Stampfer M, Stöckl D, van Meurs JBJ, Strauch K, Styrkarsdottir U, Swerdlow AJ, Tanaka T, Teras LR, Teumer A, Þorsteinsdottir U, Timpson NJ, Toniolo D, Traglia M, Troester MA, Truong T, Tyrrell J, Uitterlinden AG, Ulivi S, Vachon CM, Vitart V, Völker U, Vollenweider P, Völzke H, Wang Q, Wareham NJ, Weinberg CR, Weir DR, Wilcox AN, van Dijk KW, Willemsen G, Wilson JF, Wolffenbuttel BHR, Wolk A, Wood AR, Zhao W, Zygmunt M, Chen Z, Li L, Franke L, Burgess S, Deelen P, Pers TH, Grøndahl ML, Andersen CY, Pujol A, Lopez-Contreras AJ, Daniel JA, Stefansson K, Chang-Claude J, van der Schouw YT, Lunetta KL, Chasman DI, Easton DF, Visser JA, Ozanne SE, Namekawa SH, Solc P, Murabito JM, Ong KK, Hoffmann ER, Murray A, Roig I, Perry JRB. Genetic insights into biological mechanisms governing human ovarian ageing. Nature 2021; 596:393-397. [PMID: 34349265 PMCID: PMC7611832 DOI: 10.1038/s41586-021-03779-7] [Citation(s) in RCA: 155] [Impact Index Per Article: 51.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 06/29/2021] [Indexed: 02/07/2023]
Abstract
Reproductive longevity is essential for fertility and influences healthy ageing in women1,2, but insights into its underlying biological mechanisms and treatments to preserve it are limited. Here we identify 290 genetic determinants of ovarian ageing, assessed using normal variation in age at natural menopause (ANM) in about 200,000 women of European ancestry. These common alleles were associated with clinical extremes of ANM; women in the top 1% of genetic susceptibility have an equivalent risk of premature ovarian insufficiency to those carrying monogenic FMR1 premutations3. The identified loci implicate a broad range of DNA damage response (DDR) processes and include loss-of-function variants in key DDR-associated genes. Integration with experimental models demonstrates that these DDR processes act across the life-course to shape the ovarian reserve and its rate of depletion. Furthermore, we demonstrate that experimental manipulation of DDR pathways highlighted by human genetics increases fertility and extends reproductive life in mice. Causal inference analyses using the identified genetic variants indicate that extending reproductive life in women improves bone health and reduces risk of type 2 diabetes, but increases the risk of hormone-sensitive cancers. These findings provide insight into the mechanisms that govern ovarian ageing, when they act, and how they might be targeted by therapeutic approaches to extend fertility and prevent disease.
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Affiliation(s)
- Katherine S Ruth
- Genetics of Human Complex Traits, University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Felix R Day
- MRC Epidemiology Unit, University of Cambridge School of Clinical Medicine, Institute of Metabolic Science, Cambridge Biomedical Campus, Cambridge, UK
| | - Jazib Hussain
- DNRF Center for Chromosome Stability, Department of Cellular and Molecular Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Ana Martínez-Marchal
- Genome Integrity and Instability Group, Institut de Biotecnologia i Biomedicina, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
- Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
| | - Catherine E Aiken
- University of Cambridge Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Wellcome-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge, UK
- Department of Obstetrics and Gynaecology, University of Cambridge, The Rosie Hospital and NIHR Cambridge Biomedical Research Centre, Cambridge, UK
| | - Ajuna Azad
- DNRF Center for Chromosome Stability, Department of Cellular and Molecular Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Deborah J Thompson
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Lucie Knoblochova
- Institute of Animal Physiology and Genetics of the Czech Academy of Sciences, Libechov, Czech Republic
- Faculty of Science, Charles University, Prague, Czech Republic
| | - Hironori Abe
- Division of Reproductive Sciences, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Jane L Tarry-Adkins
- University of Cambridge Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Wellcome-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge, UK
- Department of Obstetrics and Gynaecology, University of Cambridge, The Rosie Hospital and NIHR Cambridge Biomedical Research Centre, Cambridge, UK
| | - Javier Martin Gonzalez
- Transgenic Core Facility, Department of Experimental Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | | | | | - Olivier B Bakker
- University of Groningen, University Medical Center Groningen, Department of Genetics, Groningen, The Netherlands
| | | | - Robin G Walters
- Nuffield Department of Population Health, University of Oxford, Oxford, UK
- MRC Population Health Research Unit, University of Oxford, Oxford, UK
| | - Chikashi Terao
- Laboratory for Statistical and Translational Genetics, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
- Clinical Research Center, Shizuoka General Hospital, Shizuoka, Japan
- Department of Applied Genetics, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan
| | - Sandra Turon
- Transgenic Animal Unit, Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
| | - Momoko Horikoshi
- Laboratory for Genomics of Diabetes and Metabolism, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Kuang Lin
- Nuffield Department of Population Health, University of Oxford, Oxford, UK
| | - N Charlotte Onland-Moret
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
| | - Aditya Sankar
- DNRF Center for Chromosome Stability, Department of Cellular and Molecular Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Emil Peter Thrane Hertz
- DNRF Center for Chromosome Stability, Department of Cellular and Molecular Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Pascal N Timshel
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Vallari Shukla
- DNRF Center for Chromosome Stability, Department of Cellular and Molecular Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Rehannah Borup
- DNRF Center for Chromosome Stability, Department of Cellular and Molecular Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Kristina W Olsen
- DNRF Center for Chromosome Stability, Department of Cellular and Molecular Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Reproductive Medicine, Department of Obstetrics and Gynaecology, Herlev and Gentofte Hospital, Copenhagen University Hospital, Herlev, Denmark
| | - Paula Aguilera
- DNRF Center for Chromosome Stability, Department of Cellular and Molecular Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Centro Andaluz de Biología Molecular y Medicina Regenerativa (CABIMER), Consejo Superior de Investigaciones Científicas (CSIC) - Universidad de Sevilla -Universidad Pablo de Olavide, Seville, Spain
| | - Mònica Ferrer-Roda
- Genome Integrity and Instability Group, Institut de Biotecnologia i Biomedicina, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
- Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
| | - Yan Huang
- Genome Integrity and Instability Group, Institut de Biotecnologia i Biomedicina, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
- Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
| | - Stasa Stankovic
- MRC Epidemiology Unit, University of Cambridge School of Clinical Medicine, Institute of Metabolic Science, Cambridge Biomedical Campus, Cambridge, UK
| | - Paul R H J Timmers
- Centre for Global Health Research, Usher Institute, University of Edinburgh, Edinburgh, UK
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh, UK
| | - Thomas U Ahearn
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, MD, USA
| | - Behrooz Z Alizadeh
- Department of Epidemiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Elnaz Naderi
- Department of Epidemiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Irene L Andrulis
- Fred A. Litwin Center for Cancer Genetics, Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, Ontario, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Alice M Arnold
- Department of Biostatistics, University of Washington, Seattle, WA, USA
| | - Kristan J Aronson
- Department of Public Health Sciences, Queen's University, Kingston, Ontario, Canada
- Cancer Research Institute, Queen's University, Kingston, Ontario, Canada
| | - Annelie Augustinsson
- Department of Cancer Epidemiology, Clinical Sciences, Lund University, Lund, Sweden
| | | | - Caterina M Barbieri
- Genetics of Common Disorders Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Robin N Beaumont
- Genetics of Human Complex Traits, University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Heiko Becher
- Institute of Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Matthias W Beckmann
- Department of Gynecology and Obstetrics, Comprehensive Cancer Center ER-EMN, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | | | - Sven Bergmann
- Department of Computational Biology, University of Lausanne, Lausanne, Switzerland
- Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Murielle Bochud
- University Center for Primary Care and Public Health, University of Lausanne, Lausanne, Switzerland
| | - Eric Boerwinkle
- Human Genetics Center, School of Public Health, The University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Stig E Bojesen
- Copenhagen General Population Study, Herlev and Gentofte Hospital, Copenhagen University Hospital, Herlev, Denmark
- Department of Clinical Biochemistry, Herlev and Gentofte Hospital, Copenhagen University Hospital, Herlev, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Manjeet K Bolla
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Dorret I Boomsma
- Department of Biological Psychology, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
- Amsterdam Public Health (APH) Research Institute, Amsterdam, The Netherlands
- Amsterdam Reproduction and Development (AR&D) Research Institute, Amsterdam, The Netherlands
| | - Nicholas Bowker
- MRC Epidemiology Unit, University of Cambridge School of Clinical Medicine, Institute of Metabolic Science, Cambridge Biomedical Campus, Cambridge, UK
| | - Jennifer A Brody
- Cardiovascular Health Research Unit, Departments of Medicine, Epidemiology, and Health Services, University of Washington, Seattle, WA, USA
| | - Linda Broer
- Department of Internal Medicine, Erasmus MC, Rotterdam, The Netherlands
| | - Julie E Buring
- Brigham and Women's Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| | - Archie Campbell
- Medical Genetics Section, Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - Harry Campbell
- Centre for Global Health Research, Usher Institute, University of Edinburgh, Edinburgh, UK
| | - Jose E Castelao
- Oncology and Genetics Unit, Instituto de Investigacion Sanitaria Galicia Sur (IISGS), Xerencia de Xestion Integrada de Vigo-SERGAS, Vigo, Spain
| | - Eulalia Catamo
- Institute for Maternal and Child Health - IRCCS 'Burlo Garofolo', Trieste, Italy
| | - Stephen J Chanock
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, MD, USA
| | - Georgia Chenevix-Trench
- Department of Genetics and Computational Biology, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
| | - Marina Ciullo
- Institute of Genetics and Biophysics - CNR, Naples, Italy
- IRCCS Neuromed, Pozzilli, Isernia, Italy
| | - Tanguy Corre
- Department of Computational Biology, University of Lausanne, Lausanne, Switzerland
- Swiss Institute of Bioinformatics, Lausanne, Switzerland
- University Center for Primary Care and Public Health, University of Lausanne, Lausanne, Switzerland
| | - Fergus J Couch
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Angela Cox
- Sheffield Institute for Nucleic Acids (SInFoNiA), Department of Oncology and Metabolism, University of Sheffield, Sheffield, UK
| | - Laura Crisponi
- Institute of Genetics and Biomedical Research, National Research Council, Cagliari, Italy
| | - Simon S Cross
- Academic Unit of Pathology, Department of Neuroscience, University of Sheffield, Sheffield, UK
| | - Francesco Cucca
- Institute of Genetics and Biomedical Research, National Research Council, Cagliari, Italy
- University of Sassari, Department of Biomedical Sciences, Sassari, Italy
| | - Kamila Czene
- Karolinska Institutet, Department of Medical Epidemiology and Biostatistics, Stockholm, Sweden
| | - George Davey Smith
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK
- Population Health Science, Bristol Medical School, University of Bristol, Bristol, UK
| | - Eco J C N de Geus
- Department of Biological Psychology, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
- Amsterdam Public Health (APH) Research Institute, Amsterdam, The Netherlands
- Amsterdam Reproduction and Development (AR&D) Research Institute, Amsterdam, The Netherlands
| | - Renée de Mutsert
- Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, the Netherlands
| | - Immaculata De Vivo
- Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, MA, USA
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Ellen W Demerath
- Division of Epidemiology & Community Health, University of Minnesotta, Minneapolis, MN, USA
| | - Joe Dennis
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Alison M Dunning
- Centre for Cancer Genetic Epidemiology, Department of Oncology, University of Cambridge, Cambridge, UK
| | - Miriam Dwek
- School of Life Sciences, University of Westminster, London, UK
| | - Mikael Eriksson
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Tõnu Esko
- Population and Medical Genetics, Broad Institute, Cambridge, MA, USA
- Estonian Genome Center, Institute of Genomics, University of Tartu, Tartu, Estonia
| | - Peter A Fasching
- Department of Gynecology and Obstetrics, Comprehensive Cancer Center ER-EMN, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
- David Geffen School of Medicine, Department of Medicine, Division of Hematology and Oncology, University of California at Los Angeles, Los Angeles, CA, USA
| | - Jessica D Faul
- Survey Research Center, Institute for Social Research, Ann Arbor, MI, USA
| | - Luigi Ferrucci
- Translational Gerontology Branch, National Institute on Aging, Baltimore, MD, USA
| | - Nora Franceschini
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA
| | - Timothy M Frayling
- Genetics of Human Complex Traits, University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Manuela Gago-Dominguez
- Fundación Pública Galega de Medicina Xenómica, Instituto de Investigación Sanitaria de Santiago de Compostela (IDIS), Complejo Hospitalario Universitario de Santiago, SERGAS, Santiago de Compostela, Spain
- Moores Cancer Center, University of California San Diego, La Jolla, CA, USA
| | | | - Montserrat García-Closas
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, MD, USA
| | - Christian Gieger
- Research Unit of Molecular Epidemiology, Helmholtz Zentrum München-German Research Center for Environmental Health, Neuherberg, Germany
- Institute of Epidemiology II, Helmholtz Zentrum München-German Research Center for Environmental Health, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Graham G Giles
- Cancer Epidemiology Division, Cancer Council Victoria, Melbourne, Victoria, Australia
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
- Precision Medicine, School of Clinical Sciences at Monash Health, Monash University, Clayton, Victoria, Australia
| | - Harald Grallert
- Research Unit of Molecular Epidemiology, Helmholtz Zentrum München-German Research Center for Environmental Health, Neuherberg, Germany
- Institute of Epidemiology II, Helmholtz Zentrum München-German Research Center for Environmental Health, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | | | - Vilmundur Gudnason
- Icelandic Heart Association, Kopavogur, Iceland
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | - Pascal Guénel
- Cancer & Environment Group, Center for Research in Epidemiology and Population Health (CESP), INSERM, University Paris-Sud, University Paris-Saclay, Villejuif, France
| | - Christopher A Haiman
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Niclas Håkansson
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Per Hall
- Karolinska Institutet, Department of Medical Epidemiology and Biostatistics, Stockholm, Sweden
| | - Caroline Hayward
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh, UK
| | - Chunyan He
- Division of Medical Oncology, Department of Internal Medicine, University of Kentucky College of Medicine, Lexington, KY, USA
- The Cancer Prevention and Control Research Program, University of Kentucky Markey Cancer Center, Lexington, KY, USA
| | - Wei He
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Gerardo Heiss
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA
| | - Miya K Høffding
- DNRF Center for Chromosome Stability, Department of Cellular and Molecular Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - John L Hopper
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
| | - Jouke J Hottenga
- Department of Biological Psychology, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
- Amsterdam Public Health (APH) Research Institute, Amsterdam, The Netherlands
- Amsterdam Reproduction and Development (AR&D) Research Institute, Amsterdam, The Netherlands
| | - Frank Hu
- Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, MA, USA
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
- Department of Nutrition, Harvard T. H. Chan School of Public Health, Boston, MA, USA
| | - David Hunter
- Nuffield Department of Population Health, University of Oxford, Oxford, UK
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
- Department of Nutrition, Harvard T. H. Chan School of Public Health, Boston, MA, USA
- Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, MA, USA
- Broad Institute of Harvard and MIT, Cambridge, MA, USA
| | - Mohammad A Ikram
- Department of Epidemiology, Erasmus MC, Rotterdam, The Netherlands
| | - Rebecca D Jackson
- Department of Internal Medicine, The Ohio State University, Columbus, OH, USA
| | - Micaella D R Joaquim
- Genetics of Human Complex Traits, University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Esther M John
- Department of Epidemiology & Population Health, Stanford University School of Medicine, Stanford, CA, USA
- Department of Medicine, Division of Oncology, Stanford Cancer Institute, Stanford University School of Medicine, Stanford, CA, USA
| | - Peter K Joshi
- Centre for Global Health Research, Usher Institute, University of Edinburgh, Edinburgh, UK
| | - David Karasik
- Harvard Medical School, Boston, MA, USA
- Hebrew SeniorLife Institute for Aging Research, Boston, MA, USA
| | - Sharon L R Kardia
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - Christiana Kartsonaki
- Nuffield Department of Population Health, University of Oxford, Oxford, UK
- MRC Population Health Research Unit, University of Oxford, Oxford, UK
| | - Robert Karlsson
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Cari M Kitahara
- Radiation Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD, USA
| | - Ivana Kolcic
- Faculty of Medicine, University of Split, Split, Croatia
| | - Charles Kooperberg
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Peter Kraft
- Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, MA, USA
- Department of Biostatistics, Harvard T. H. Chan School of Public Health, Boston, MA, USA
| | - Allison W Kurian
- Department of Epidemiology & Population Health, Stanford University School of Medicine, Stanford, CA, USA
- Department of Medicine, Division of Oncology, Stanford Cancer Institute, Stanford University School of Medicine, Stanford, CA, USA
| | - Zoltan Kutalik
- Swiss Institute of Bioinformatics, Lausanne, Switzerland
- University Center for Primary Care and Public Health, University of Lausanne, Lausanne, Switzerland
| | - Martina La Bianca
- Institute for Maternal and Child Health - IRCCS 'Burlo Garofolo', Trieste, Italy
| | - Genevieve LaChance
- Department of Twin Research and Genetic Epidemiology, King's College London, London, UK
| | - Claudia Langenberg
- MRC Epidemiology Unit, University of Cambridge School of Clinical Medicine, Institute of Metabolic Science, Cambridge Biomedical Campus, Cambridge, UK
| | - Lenore J Launer
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, Intramural Research Program, National Institutes of Health, Bethesda, MD, USA
| | - Joop S E Laven
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Deborah A Lawlor
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK
- Population Health Science, Bristol Medical School, University of Bristol, Bristol, UK
| | - Loic Le Marchand
- Epidemiology Program, University of Hawaii Cancer Center, Honolulu, HI, USA
| | - Jingmei Li
- Karolinska Institutet, Department of Medical Epidemiology and Biostatistics, Stockholm, Sweden
| | - Annika Lindblom
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
- Department of Clinical Genetics, Karolinska University Hospital, Stockholm, Sweden
| | - Sara Lindstrom
- Department of Epidemiology, University of Washington, Seattle, WA, USA
| | - Tricia Lindstrom
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - Martha Linet
- Radiation Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD, USA
| | - YongMei Liu
- Center for Human Genetics, Division of Public Health Sciences, Wake Forest School of Medicine, Wake Forest, NC, USA
| | - Simin Liu
- Department of Epidemiology, Brown University, Providence, RI, USA
- Department of Medicine, Brown University, Providence, RI, USA
| | - Jian'an Luan
- MRC Epidemiology Unit, University of Cambridge School of Clinical Medicine, Institute of Metabolic Science, Cambridge Biomedical Campus, Cambridge, UK
| | - Reedik Mägi
- Estonian Genome Center, Institute of Genomics, University of Tartu, Tartu, Estonia
| | - Patrik K E Magnusson
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Massimo Mangino
- Department of Twin Research and Genetic Epidemiology, King's College London, London, UK
- NIHR Biomedical Research Centre at Guy's and St. Thomas' Foundation Trust, London, UK
| | - Arto Mannermaa
- Translational Cancer Research Area, University of Eastern Finland, Kuopio, Finland
- Institute of Clinical Medicine, Pathology and Forensic Medicine, University of Eastern Finland, Kuopio, Finland
- Biobank of Eastern Finland, Kuopio University Hospital, Kuopio, Finland
| | - Brumat Marco
- Department of Medical Sciences, University of Trieste, Trieste, Italy
| | - Jonathan Marten
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh, UK
| | - Nicholas G Martin
- QIMR Berghofer Medical Research Insititute, Brisbane, Queensland, Australia
| | - Hamdi Mbarek
- Department of Biological Psychology, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
- Amsterdam Public Health (APH) Research Institute, Amsterdam, The Netherlands
- Amsterdam Reproduction and Development (AR&D) Research Institute, Amsterdam, The Netherlands
| | - Barbara McKnight
- Department of Biostatistics, University of Washington, Seattle, WA, USA
| | - Sarah E Medland
- QIMR Berghofer Medical Research Insititute, Brisbane, Queensland, Australia
| | - Christa Meisinger
- Institute of Epidemiology II, Helmholtz Zentrum München-German Research Center for Environmental Health, Neuherberg, Germany
- Central Hospital of Augsburg, MONICA/KORA Myocardial Infarction Registry, Augsburg, Germany
| | - Thomas Meitinger
- Institute of Human Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Cristina Menni
- Department of Twin Research and Genetic Epidemiology, King's College London, London, UK
| | - Andres Metspalu
- Estonian Genome Center, Institute of Genomics, University of Tartu, Tartu, Estonia
| | - Lili Milani
- Estonian Genome Center, Institute of Genomics, University of Tartu, Tartu, Estonia
| | - Roger L Milne
- Cancer Epidemiology Division, Cancer Council Victoria, Melbourne, Victoria, Australia
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
- Precision Medicine, School of Clinical Sciences at Monash Health, Monash University, Clayton, Victoria, Australia
| | - Grant W Montgomery
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Dennis O Mook-Kanamori
- Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, the Netherlands
- Department of Public Health and Primary Care, Leiden University Medical Center, Leiden, the Netherlands
| | - Antonella Mulas
- Institute of Genetics and Biomedical Research, National Research Council, Cagliari, Italy
| | - Anna M Mulligan
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
- Laboratory Medicine Program, University Health Network, Toronto, Ontario, Canada
| | - Alison Murray
- The Institute of Medical Sciences, Aberdeen Biomedical Imaging Centre, University of Aberdeen, Aberdeen, UK
| | - Mike A Nalls
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Anne Newman
- Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Raymond Noordam
- Department of Internal Medicine, Section of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, the Netherlands
| | - Teresa Nutile
- Institute of Genetics and Biophysics - CNR, Naples, Italy
| | - Dale R Nyholt
- Centre for Genomics and Personalised Health, School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Andrew F Olshan
- Department of Epidemiology, Gillings School of Global Public Health and UNC Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Håkan Olsson
- Department of Cancer Epidemiology, Clinical Sciences, Lund University, Lund, Sweden
| | - Jodie N Painter
- QIMR Berghofer Medical Research Insititute, Brisbane, Queensland, Australia
| | - Alpa V Patel
- Department of Population Science, American Cancer Society, Atlanta, GA, USA
| | - Nancy L Pedersen
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Natalia Perjakova
- Estonian Genome Center, Institute of Genomics, University of Tartu, Tartu, Estonia
| | - Annette Peters
- Institute of Epidemiology II, Helmholtz Zentrum München-German Research Center for Environmental Health, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Ulrike Peters
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Paul D P Pharoah
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
- Centre for Cancer Genetic Epidemiology, Department of Oncology, University of Cambridge, Cambridge, UK
| | - Ozren Polasek
- Faculty of Medicine, University of Split, Split, Croatia
- Gen-Info Ltd, Zagreb, Croatia
| | - Eleonora Porcu
- Institute of Genetics and Biomedical Research, National Research Council, Cagliari, Italy
| | - Bruce M Psaty
- Cardiovascular Health Research Unit, Departments of Medicine, Epidemiology, and Health Services, University of Washington, Seattle, WA, USA
| | | | - Gad Rennert
- Clalit National Cancer Control Center, Carmel Medical Center and Technion Faculty of Medicine, Haifa, Israel
| | - Hedy S Rennert
- Clalit National Cancer Control Center, Carmel Medical Center and Technion Faculty of Medicine, Haifa, Israel
| | - Paul M Ridker
- Brigham and Women's Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| | - Susan M Ring
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK
- Population Health Science, Bristol Medical School, University of Bristol, Bristol, UK
| | - Antonietta Robino
- Institute for Maternal and Child Health - IRCCS 'Burlo Garofolo', Trieste, Italy
| | | | - Frits R Rosendaal
- Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, the Netherlands
| | - Jacques Rossouw
- Women's Health Initiative Branch, National Heart, Lung, and Blood Institute, Bethesda, MD, USA
| | - Igor Rudan
- Centre for Global Health Research, Usher Institute, University of Edinburgh, Edinburgh, UK
| | - Rico Rueedi
- Department of Computational Biology, University of Lausanne, Lausanne, Switzerland
- Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Daniela Ruggiero
- Institute of Genetics and Biophysics - CNR, Naples, Italy
- IRCCS Neuromed, Pozzilli, Isernia, Italy
| | - Cinzia F Sala
- Genetics of Common Disorders Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | | | - Dale P Sandler
- Epidemiology Branch, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC, USA
| | - Serena Sanna
- Institute of Genetics and Biomedical Research, National Research Council, Cagliari, Italy
| | - Elinor J Sawyer
- School of Cancer & Pharmaceutical Sciences, Comprehensive Cancer Centre, Guy's Campus, King's College London, London, UK
| | - Chloé Sarnowski
- Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
| | - David Schlessinger
- National Institute on Aging, Intramural Research Program, Baltimore, MD, USA
| | - Marjanka K Schmidt
- Division of Molecular Pathology, The Netherlands Cancer Institute - Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
- Division of Psychosocial Research and Epidemiology, The Netherlands Cancer Institute - Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
| | - Minouk J Schoemaker
- Division of Genetics and Epidemiology, The Institute of Cancer Research, London, UK
| | - Katharina E Schraut
- Centre for Global Health Research, Usher Institute, University of Edinburgh, Edinburgh, UK
- Centre for Cardiovascular Sciences, Queen's Medical Research Institute, University of Edinburgh, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - Christopher Scott
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - Saleh Shekari
- Genetics of Human Complex Traits, University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Amruta Shrikhande
- DNRF Center for Chromosome Stability, Department of Cellular and Molecular Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Albert V Smith
- Icelandic Heart Association, Kopavogur, Iceland
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | - Blair H Smith
- Division of Population and Health Genomics, University of Dundee, Dundee, UK
| | - Jennifer A Smith
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | | | - Melissa C Southey
- Cancer Epidemiology Division, Cancer Council Victoria, Melbourne, Victoria, Australia
- Precision Medicine, School of Clinical Sciences at Monash Health, Monash University, Clayton, Victoria, Australia
- Department of Clinical Pathology, The University of Melbourne, Melbourne, Victoria, Australia
| | - Tim D Spector
- Department of Twin Research and Genetic Epidemiology, King's College London, London, UK
| | - John J Spinelli
- Population Oncology, BC Cancer, Vancouver, British Columbia, Canada
- School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada
| | - Meir Stampfer
- Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, MA, USA
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
- Department of Nutrition, Harvard T. H. Chan School of Public Health, Boston, MA, USA
| | - Doris Stöckl
- Institute of Epidemiology II, Helmholtz Zentrum München-German Research Center for Environmental Health, Neuherberg, Germany
- Department of Obstetrics and Gynaecology, Campus Grosshadern, Ludwig-Maximilians-Universität, Munich, Germany
| | | | - Konstantin Strauch
- Institute of Genetic Epidemiology, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany
- Chair of Genetic Epidemiology, IBE, Faculty of Medicine, LMU Munich, Munich, Germany
- Institute of Medical Biostatistics, Epidemiology and Informatics (IMBEI), University Medical Center, Johannes Gutenberg University, Mainz, Germany
| | | | - Anthony J Swerdlow
- Division of Genetics and Epidemiology, The Institute of Cancer Research, London, UK
- Division of Breast Cancer Research, The Institute of Cancer Research, London, UK
| | - Toshiko Tanaka
- Translational Gerontology Branch, National Institute on Aging, Baltimore, MD, USA
| | - Lauren R Teras
- Department of Population Science, American Cancer Society, Atlanta, GA, USA
| | - Alexander Teumer
- Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany
| | - Unnur Þorsteinsdottir
- deCODE genetics/Amgen, Reykjavik, Iceland
- Faculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik, Iceland
| | - Nicholas J Timpson
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK
- Population Health Science, Bristol Medical School, University of Bristol, Bristol, UK
| | - Daniela Toniolo
- Genetics of Common Disorders Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Michela Traglia
- Genetics of Common Disorders Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Melissa A Troester
- Department of Epidemiology, Gillings School of Global Public Health and UNC Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Thérèse Truong
- Cancer & Environment Group, Center for Research in Epidemiology and Population Health (CESP), INSERM, University Paris-Sud, University Paris-Saclay, Villejuif, France
| | - Jessica Tyrrell
- Genetics of Human Complex Traits, University of Exeter Medical School, University of Exeter, Exeter, UK
| | - André G Uitterlinden
- Department of Internal Medicine, Erasmus MC, Rotterdam, The Netherlands
- Department of Epidemiology, Erasmus MC, Rotterdam, The Netherlands
| | - Sheila Ulivi
- Institute for Maternal and Child Health - IRCCS 'Burlo Garofolo', Trieste, Italy
| | - Celine M Vachon
- Department of Health Science Research, Division of Epidemiology, Mayo Clinic, Rochester, MN, USA
| | - Veronique Vitart
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh, UK
| | - Uwe Völker
- Interfaculty Institute for Genetics and Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - Peter Vollenweider
- Department of Medicine, Internal Medicine, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Henry Völzke
- Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany
| | - Qin Wang
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Nicholas J Wareham
- MRC Epidemiology Unit, University of Cambridge School of Clinical Medicine, Institute of Metabolic Science, Cambridge Biomedical Campus, Cambridge, UK
| | - Clarice R Weinberg
- Biostatistics and Computational Biology Branch, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC, USA
| | - David R Weir
- Survey Research Center, Institute for Social Research, Ann Arbor, MI, USA
| | - Amber N Wilcox
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, MD, USA
| | - Ko Willems van Dijk
- Department of Internal Medicine, Division of Endocrinology, Leiden University Medical Center, Leiden, the Netherlands
- Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
- Department of Human Genetics, Leiden University Medical Center, Leiden, the Netherlands
| | - Gonneke Willemsen
- Department of Biological Psychology, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
- Amsterdam Public Health (APH) Research Institute, Amsterdam, The Netherlands
- Amsterdam Reproduction and Development (AR&D) Research Institute, Amsterdam, The Netherlands
| | - James F Wilson
- Centre for Global Health Research, Usher Institute, University of Edinburgh, Edinburgh, UK
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh, UK
| | - Bruce H R Wolffenbuttel
- Department of Endocrinology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Alicja Wolk
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
- Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
| | - Andrew R Wood
- Genetics of Human Complex Traits, University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Wei Zhao
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - Marek Zygmunt
- Department of Obstetrics and Gynecology, University Medicine Greifswald, Greifswald, Germany
| | - Zhengming Chen
- Nuffield Department of Population Health, University of Oxford, Oxford, UK
- MRC Population Health Research Unit, University of Oxford, Oxford, UK
| | - Liming Li
- School of Public Health, Peking University Health Science Center, Beijing, P.R. China
- Peking University Center for Public Health and Epidemic Preparedness & Response, Beijing, P.R. China
| | - Lude Franke
- University of Groningen, University Medical Center Groningen, Department of Genetics, Groningen, The Netherlands
- Oncode Institute, Utrecht, The Netherlands
| | - Stephen Burgess
- Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
- MRC Biostatistics Unit, University of Cambridge, Cambridge, UK
| | - Patrick Deelen
- University of Groningen, University Medical Center Groningen, Department of Genetics, Groningen, The Netherlands
- Department of Genetics, University Medical Centre Utrecht, Utrecht, The Netherlands
| | - Tune H Pers
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Marie Louise Grøndahl
- Reproductive Medicine, Department of Obstetrics and Gynaecology, Herlev and Gentofte Hospital, Copenhagen University Hospital, Herlev, Denmark
| | - Claus Yding Andersen
- Laboratory of Reproductive Biology, The Juliane Marie Centre for Women, Children and Reproduction, Copenhagen University Hospital and Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Anna Pujol
- Transgenic Animal Unit, Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
| | - Andres J Lopez-Contreras
- DNRF Center for Chromosome Stability, Department of Cellular and Molecular Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Centro Andaluz de Biología Molecular y Medicina Regenerativa (CABIMER), Consejo Superior de Investigaciones Científicas (CSIC) - Universidad de Sevilla -Universidad Pablo de Olavide, Seville, Spain
| | - Jeremy A Daniel
- The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Kari Stefansson
- deCODE genetics/Amgen, Reykjavik, Iceland
- Faculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik, Iceland
| | - Jenny Chang-Claude
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Cancer Epidemiology Group, University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Yvonne T van der Schouw
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
| | - Kathryn L Lunetta
- Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
- NHLBI's and Boston University's Framingham Heart Study, Framingham, MA, USA
| | - Daniel I Chasman
- Brigham and Women's Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| | - Douglas F Easton
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
- Centre for Cancer Genetic Epidemiology, Department of Oncology, University of Cambridge, Cambridge, UK
| | - Jenny A Visser
- Department of Internal Medicine, Erasmus MC, Rotterdam, The Netherlands
| | - Susan E Ozanne
- University of Cambridge Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Wellcome-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge, UK
| | - Satoshi H Namekawa
- Division of Reproductive Sciences, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Petr Solc
- Institute of Animal Physiology and Genetics of the Czech Academy of Sciences, Libechov, Czech Republic
| | - Joanne M Murabito
- NHLBI's and Boston University's Framingham Heart Study, Framingham, MA, USA
- Boston University School of Medicine, Department of Medicine, Section of General Internal Medicine, Boston, MA, USA
| | - Ken K Ong
- MRC Epidemiology Unit, University of Cambridge School of Clinical Medicine, Institute of Metabolic Science, Cambridge Biomedical Campus, Cambridge, UK
- Department of Paediatrics, University of Cambridge, Cambridge, UK
| | - Eva R Hoffmann
- DNRF Center for Chromosome Stability, Department of Cellular and Molecular Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
| | - Anna Murray
- Genetics of Human Complex Traits, University of Exeter Medical School, University of Exeter, Exeter, UK.
| | - Ignasi Roig
- Genome Integrity and Instability Group, Institut de Biotecnologia i Biomedicina, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain.
- Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain.
| | - John R B Perry
- MRC Epidemiology Unit, University of Cambridge School of Clinical Medicine, Institute of Metabolic Science, Cambridge Biomedical Campus, Cambridge, UK.
- Department of Internal Medicine, Erasmus MC, Rotterdam, The Netherlands.
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13
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Bello A, Jungnickel B. Impact of Chk1 dosage on somatic hypermutation in vivo. Immunol Cell Biol 2021; 99:879-893. [PMID: 34042197 DOI: 10.1111/imcb.12480] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 04/19/2021] [Accepted: 05/24/2021] [Indexed: 12/14/2022]
Abstract
Checkpoint signaling in the context of a functional DNA damage response is crucial for the prevention of oncogenic transformation of cells. Our immune system, though, takes the risk of attenuated checkpoint responses during immunoglobulin diversification. B cells undergo continuous DNA damage and error-prone repair of their immunoglobulin genes during the process of somatic hypermutation. An accompanying attenuation of the DNA damage response via the ATR-Chk1 axis in B cells is believed to allow for a better DNA damage tolerance and for evasion of apoptosis, so as to ensure mutations to be passed on. We sought to determine whether the downregulation of Chk1 could also directly influence the process of hypermutation in vivo by altering the relative activity of error-prone DNA repair pathways. We analyzed the humoral response and the hypermutation process in mice whose B cells express reduced levels of the Chk1 protein. We found that Chk1 heterozygosity limits the accumulation of mutations in the immunoglobulin loci, likely by impacting on the survival of B cells as they accumulate DNA damage. Nevertheless, we unveiled an unanticipated role for Chk1 downregulation in favoring A/T mutagenesis at the antibody-variable regions during hypermutation. Even though immunoglobulin mutagenesis was found to be reduced, Chk1 signaling attenuation allows for sustained mutagenesis outside the immunoglobulin loci. Our study thus reveals that a proper Chk1 dosage is crucial for adequate somatic hypermutation in B cells.
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Affiliation(s)
- Amanda Bello
- Department of Cell Biology, Institute of Biochemistry and Biophysics, School of Biological Sciences, Friedrich Schiller University, Jena, Germany
| | - Berit Jungnickel
- Department of Cell Biology, Institute of Biochemistry and Biophysics, School of Biological Sciences, Friedrich Schiller University, Jena, Germany
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14
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Branigan TB, Kozono D, Schade AE, Deraska P, Rivas HG, Sambel L, Reavis HD, Shapiro GI, D'Andrea AD, DeCaprio JA. MMB-FOXM1-driven premature mitosis is required for CHK1 inhibitor sensitivity. Cell Rep 2021; 34:108808. [PMID: 33657372 PMCID: PMC7970065 DOI: 10.1016/j.celrep.2021.108808] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 12/24/2020] [Accepted: 02/09/2021] [Indexed: 12/25/2022] Open
Abstract
To identify genes whose loss confers resistance to CHK1 inhibitors, we perform genome-wide CRISPR-Cas9 screens in non-small-cell lung cancer (NSCLC) cell lines treated with the CHK1 inhibitor prexasertib (CHK1i). Five of the top six hits of the screens, MYBL2 (B-MYB), LIN54, FOXM1, cyclin A2 (CCNA2), and CDC25B, are cell-cycle-regulated genes that contribute to entry into mitosis. Knockout of MMB-FOXM1 complex components LIN54 and FOXM1 reduce CHK1i-induced DNA replication stress markers and premature mitosis during Late S phase. Activation of a feedback loop between the MMB-FOXM1 complex and CDK1 is required for CHK1i-induced premature mitosis in Late S phase and subsequent replication catastrophe, indicating that dysregulation of the S to M transition is necessary for CHK1 inhibitor sensitivity. These findings provide mechanistic insights into small molecule inhibitors currently studied in clinical trials and provide rationale for combination therapies. Branigan et al., by using genome-wide CRISPR screens, identify the MMB-FOXM1 complex as being required for CHK1 inhibitor (CHK1i) sensitivity. Their study shows that CHK1i-induced premature activation of the G2/M transcriptional program by this complex triggers a breakdown in the separation of DNA synthesis and mitosis, leading to replication catastrophe.
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Affiliation(s)
- Timothy B Branigan
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Program in Virology, Graduate School of Arts and Sciences, Harvard University, Cambridge, MA, USA
| | - David Kozono
- Department of Radiation Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Center for DNA Damage and Repair, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Amy E Schade
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Program in Virology, Graduate School of Arts and Sciences, Harvard University, Cambridge, MA, USA
| | - Peter Deraska
- Department of Radiation Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Center for DNA Damage and Repair, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Hembly G Rivas
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Program in Virology, Graduate School of Arts and Sciences, Harvard University, Cambridge, MA, USA
| | - Larissa Sambel
- Department of Radiation Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Center for DNA Damage and Repair, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Hunter D Reavis
- Department of Radiation Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Center for DNA Damage and Repair, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Geoffrey I Shapiro
- Center for DNA Damage and Repair, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Alan D D'Andrea
- Department of Radiation Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Center for DNA Damage and Repair, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - James A DeCaprio
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Program in Virology, Graduate School of Arts and Sciences, Harvard University, Cambridge, MA, USA; Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA.
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15
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Adverse Cerebral Cardiovascular Events Associated With Checkpoint Kinase 1 Inhibitors: A Systemic Review. J Cardiovasc Pharmacol 2021; 77:549-556. [PMID: 33951693 DOI: 10.1097/fjc.0000000000000997] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 01/31/2021] [Indexed: 11/26/2022]
Abstract
ABSTRACT Checkpoint kinase 1 (CHK1) plays a broad role in regulating the cell cycle process and is involved in the pathogenesis of various malignant tumors. Preclinical and animal studies have shown that CHK1 inhibitors can enhance the cytotoxic effects of radiotherapy and chemotherapy. Currently, CHK1 inhibitors are actively tested in clinical trials. Nonspecific adverse cerebral cardiovascular events were reported after CHK1 inhibitor use; these events need to be monitored and managed carefully during the clinical application of CHK1 inhibitors. To get a better understanding of these, noteworthy adverse cardiovascular events, we systemically searched the PubMed, Cochrane databases, and clinicaltrials.gov, for relevant clinical trials and case reports. A total of 19 studies were identified and included in this review. Among the reported cerebral cardiovascular events, the most common is incident abnormal blood pressure fluctuations (n = 35), followed by incident QTcF prolongation (n = 15), arrhythmia (n = 13, 3 atrial fibrillation and 10 bradycardia), thromboembolic events (n = 9, 6 pulmonary embolisms, 2 stroke, and 1 cerebrovascular event), cardiac troponin T elevation (n = 2), and ischemic chest pain (n = 2). Besides, the estimated incidence for overall cardiovascular events based on the available data is 0.292 (95% confidence interval: 0.096-0.488). CHK1 inhibitors administered in tumor patients on top of conventional therapies can not only enhance the antitumor effects, but also induce adverse cerebral cardiovascular events. It is, therefore, of importance to carefully monitor and manage the CHK1 inhibitor-induced adverse effects on the cerebral cardiovascular system while applying CHK1 inhibitors to tumor patients.
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16
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Liu K, Graves JD, Lin FT, Lin WC. Overexpression of TopBP1, a canonical ATR/Chk1 activator, paradoxically hinders ATR/Chk1 activation in cancer. J Biol Chem 2021; 296:100382. [PMID: 33556369 PMCID: PMC7949146 DOI: 10.1016/j.jbc.2021.100382] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 01/26/2021] [Accepted: 02/02/2021] [Indexed: 11/05/2022] Open
Abstract
Topoisomerase IIβ-binding protein 1 (TopBP1) is involved in cellular replication among other functions and is known to activate ATR/Chk1 during replicative stress. TopBP1 is also expressed at high levels in many cancers. However, the impact of TopBP1 overexpression on ATR/Chk1 activation and cancer development has not been investigated. Here we demonstrate that the degree of ATR/Chk1 activation is regulated by TopBP1 in a biphasic, concentration-dependent manner in a nontransformed MCF10A cell line and several cancer cell lines, including H1299, MDA-MB468, and U2OS. At low levels, TopBP1 activates ATR/Chk1, but once TopBP1 protein accumulates above an optimal level, it paradoxically leads to lower activation of ATR/Chk1. This is due to the perturbation of ATR–TopBP1 interaction and ATR chromatin loading by excessive TopBP1. Overexpression of TopBP1 thus hinders the ATR/Chk1 checkpoint response, leading to the impairment of genome integrity as demonstrated by the cytokinesis-block micronucleus assay. In contrast, moderate depletion of TopBP1 by shRNA in TopBP1-overexpressing cancer cells enhanced ATR/Chk1 activation and S-phase checkpoint response after replicative stress. The clinical significance of these findings is supported by an association between TopBP1 overexpression and genome instability in many types of human cancer. Taken together, our study illustrates an unexpected relationship between the levels of TopBP1 and the final functional outcome and suggests TopBP1 overexpression as a new mechanism directly contributing to genomic instability during tumorigenesis.
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Affiliation(s)
- Kang Liu
- Section of Hematology/Oncology, Department of Medicine, Baylor College of Medicine, Houston, Texas, USA
| | - Joshua D Graves
- Section of Hematology/Oncology, Department of Medicine, Baylor College of Medicine, Houston, Texas, USA
| | - Fang-Tsyr Lin
- Section of Hematology/Oncology, Department of Medicine, Baylor College of Medicine, Houston, Texas, USA
| | - Weei-Chin Lin
- Section of Hematology/Oncology, Department of Medicine, Baylor College of Medicine, Houston, Texas, USA; Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas, USA.
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17
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Kinetics of DNA Repair in Vicia faba Meristem Regeneration Following Replication Stress. Cells 2021; 10:cells10010088. [PMID: 33430297 PMCID: PMC7825715 DOI: 10.3390/cells10010088] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 12/29/2020] [Accepted: 01/04/2021] [Indexed: 12/14/2022] Open
Abstract
The astonishing survival abilities of Vicia faba, one the earliest domesticated plants, are associated, among other things, to the highly effective replication stress response system which ensures smooth cell division and proper preservation of genomic information. The most crucial pathway here seems to be the ataxia telangiectasia-mutated kinase (ATM)/ataxia telangiectasia and Rad3-related kinase (ATR)-dependent replication stress response mechanism, also present in humans. In this article, we attempted to take an in-depth look at the dynamics of regeneration from the effects of replication inhibition and cell cycle checkpoint overriding causing premature chromosome condensation (PCC) in terms of DNA damage repair and changes in replication dynamics. We were able to distinguish a unique behavior of replication factors at the very start of the regeneration process in the PCC-induced cells. We extended the experiment and decided to profile the changes in replication on the level of a single replication cluster of heterochromatin (both alone and with regard to its position in the nucleus), including the mathematical profiling of the size, activity and shape. The results obtained during these experiments led us to the conclusion that even “chaotic” events are dealt with in a proper degree of order.
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Zhou J, Zhao H, Huang Z, Ye X, Zhang L, Li Q, Zhao Z, Su X, Liu G, Du J. Differential transcriptomic analysis of crayfish (Procambarus clarkii) from a rice coculture system challenged by Vibrio parahaemolyticus. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY D-GENOMICS & PROTEOMICS 2020; 36:100741. [PMID: 32919192 DOI: 10.1016/j.cbd.2020.100741] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 07/26/2020] [Accepted: 08/27/2020] [Indexed: 12/12/2022]
Abstract
Rice-crayfish (Procambarus clarkii) coculture is an effective farming mode and has been promoted in various regions of China. However, infection in crayfish can be a significant economic drain. We found crayfish infected with Vibrio parahemolyticus (VP), and to understand the molecular mechanisms of the immune responses of crayfish to VP infection, Illumina sequencing was employed to identify changes in the mRNA of hepatopancreatic tissue. A total of 47.30 and 43.01million high-quality transcriptome reads were generated from the hepatopancreatic samples of the experimental group (EG) and control group (CG), respectively. We found 5559 genes were significantly differentially expressed, including 2521 up-regulated genes (45.35%) and 3038 down-regulated genes (54.65%). These genes were enriched in 126 GO terms and 76 KEGG pathways (P ≤ 0.05), including the MAPK and PI3K-Akt signaling pathways and cell adhesion molecules, with 23 up-regulated genes and 3 down-regulated genes related to immune responses in the EG relative to the CG. Histopathological analysis revealed that the epithelial cells of the hepatopancreatic tubules in the EG were severely atrophic, necrotic, and exfoliated, resulting in thin and collapsing hepatopancreatic tubules. The expression patterns of 8 differentially expressed genes involved in immune responses were validated by quantitative real-time RT-PCR. These results provide a valuable basis for the immune responses of crayfish to acute hepatopancreatic necrosis disease at transcriptome level.
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Affiliation(s)
- Jian Zhou
- Fisheries Institute, Sichuan Academy of Agricultural Sciences, Chengdu 611731, Sichuan, China
| | - Han Zhao
- Fisheries Institute, Sichuan Academy of Agricultural Sciences, Chengdu 611731, Sichuan, China
| | - Zhipeng Huang
- Fisheries Institute, Sichuan Academy of Agricultural Sciences, Chengdu 611731, Sichuan, China
| | - Xianlin Ye
- Sichuan Academy of Agricultural Sciences, Chengdu 610066, Sichuan, China
| | - Lu Zhang
- Fisheries Institute, Sichuan Academy of Agricultural Sciences, Chengdu 611731, Sichuan, China
| | - Qiang Li
- Fisheries Institute, Sichuan Academy of Agricultural Sciences, Chengdu 611731, Sichuan, China
| | - Zhongmeng Zhao
- Fisheries Institute, Sichuan Academy of Agricultural Sciences, Chengdu 611731, Sichuan, China
| | - XuTao Su
- Fisheries Institute, Sichuan Academy of Agricultural Sciences, Chengdu 611731, Sichuan, China
| | - GuangXun Liu
- Fisheries Institute, Sichuan Academy of Agricultural Sciences, Chengdu 611731, Sichuan, China
| | - Jun Du
- Fisheries Institute, Sichuan Academy of Agricultural Sciences, Chengdu 611731, Sichuan, China.
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Enhancing chemotherapy response through augmented synthetic lethality by co-targeting nucleotide excision repair and cell-cycle checkpoints. Nat Commun 2020; 11:4124. [PMID: 32807787 PMCID: PMC7431578 DOI: 10.1038/s41467-020-17958-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 07/22/2020] [Indexed: 01/23/2023] Open
Abstract
In response to DNA damage, a synthetic lethal relationship exists between the cell cycle checkpoint kinase MK2 and the tumor suppressor p53. Here, we describe the concept of augmented synthetic lethality (ASL): depletion of a third gene product enhances a pre-existing synthetic lethal combination. We show that loss of the DNA repair protein XPA markedly augments the synthetic lethality between MK2 and p53, enhancing anti-tumor responses alone and in combination with cisplatin chemotherapy. Delivery of siRNA-peptide nanoplexes co-targeting MK2 and XPA to pre-existing p53-deficient tumors in a highly aggressive, immunocompetent mouse model of lung adenocarcinoma improves long-term survival and cisplatin response beyond those of the synthetic lethal p53 mutant/MK2 combination alone. These findings establish a mechanism for co-targeting DNA damage-induced cell cycle checkpoints in combination with repair of cisplatin-DNA lesions in vivo using RNAi nanocarriers, and motivate further exploration of ASL as a generalized strategy to improve cancer treatment.
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PIBF1 suppresses the ATR/CHK1 signaling pathway and promotes proliferation and motility of triple-negative breast cancer cells. Breast Cancer Res Treat 2020; 182:591-600. [PMID: 32529408 DOI: 10.1007/s10549-020-05732-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 06/05/2020] [Indexed: 02/06/2023]
Abstract
PURPOSE This study evaluates the oncogenic role of PIBF1 in triple-negative breast cancer (TNBC). TNBC is considered to have a poorer prognosis than other types of breast cancer and is associated with high risk of recurrence and distant metastasis. Currently, there are no effective therapies for the TNBC patients with distant metastasis due to the lack of targeted therapeutic options. METHODS The effects of PIBF1 knockdown on the cell viability and motility of TNBC cell lines were investigated. Effects of PIBF1 overexpression on tumorigenicity and cell motility were confirmed using Ba/F3 cell line and xenograft study on BALB/c nude mice. RESULTS In TNBC cell lines that highly express PIBF1, knockdown of PIBF1 induces apoptosis and suppresses cell viability and motility with activation of the ATR/CHK1 signaling pathway. Moreover, the oncogenic function of PIBF1 was confirmed using the Ba/F3 cell line. CONCLUSION For the first time, these findings clarify the role of PIBF1 in regulating ATR/CHK1 signaling pathway and inhibiting the proliferation and migration of TNBC cell lines. These results demonstrate the oncogenic roles of PIBF1 and provide new insights into the function and the molecular mechanism of PIBF1 in malignant TNBC.
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Lee E, Eum SY, Slifer SH, Martin ER, Takita C, Wright JL, Hines RB, Hu JJ. Association Between Polymorphisms in DNA Damage Repair Genes and Radiation Therapy-Induced Early Adverse Skin Reactions in a Breast Cancer Population: A Polygenic Risk Score Approach. Int J Radiat Oncol Biol Phys 2020; 106:948-957. [PMID: 32007367 DOI: 10.1016/j.ijrobp.2019.12.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 12/16/2019] [Accepted: 12/19/2019] [Indexed: 12/12/2022]
Abstract
PURPOSE Genetic variations in DNA damage repair (DDR) genes may influence radiation therapy (RT)-induced acute normal tissue toxicity in patients with breast cancer. Identifying an individual or multiple single-nucleotide polymorphisms (SNPs) associated with RT-induced early adverse skin reactions (EASR) is critical for precision medicine in radiation oncology. METHODS AND MATERIALS At the completion of RT, EASR was assessed using the Oncology Nursing Society scale (0-6) in 416 patients with breast cancer, and Oncology Nursing Society score ≥4 was considered RT-induced EASR. PLINK set-based tests and subsequent individual SNP association analyses were conducted to identify genes and SNPs associated with EASR among the 53 DDR genes and 1968 SNPs. A weighted polygenic risk score (PRS) model was constructed to ascertain the association between the joint effect of risk alleles and EASR. RESULTS The study population consisted of 264 Hispanic whites, 86 blacks or African Americans, 55 non-Hispanic whites, and 11 others. A total of 115 patients (27.6%) developed EASR. Five genes (ATM, CHEK1, ERCC2, RAD51C, and TGFB1) were significantly associated with RT-induced EASR. Nine SNPs within these 5 genes were further identified: ATM rs61915066, CHEK1 rs11220184, RAD51C rs302877, rs405684, TBFB1 rs4803455, rs2241714, and ERCC2 rs60152947, rs10404465, rs1799786. In a multivariable-adjusted PRS model, patients in a higher quartile of PRS were more likely to develop EASR compared with patients in the lowest quartile (ORq2 vs.q1 = 1.94, 95% CI, 0.86-4.39; ORq3 vs.q1 = 3.46, 95% CI, 1.57-7.63; ORq4 vs.q1 = 8.64, 95% CI, 3.92-19.02; and Ptrend < .0001). CONCLUSIONS We newly identified the associations between 9 SNPs in ATM, CHEK1, RAD51C, TGFB1, and ERCC2 and RT-induced EASR. PRS modeling showed its potential in identifying populations at risk. Multiple SNPs in DDR genes may jointly contribute to interindividual variation in RT-induced EASR. Validation in an independent external cohort is required to determine the clinical significance of these predictive biomarkers.
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Affiliation(s)
- Eunkyung Lee
- Department of Health Sciences, University of Central Florida College of Health Professions and Sciences, Orlando, Florida.
| | - Sung Y Eum
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, Florida
| | - Susan H Slifer
- Center for Genetic Epidemiology and Statistical Genetics, John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, Florida
| | - Eden R Martin
- Dr. John T. Macdonald Department of Human Genetics, Center for Genetic Epidemiology and Statistical Genetics, John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, Florida
| | - Cristiane Takita
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, Florida; Department of Radiation Oncology, University of Miami Miller School of Medicine, Miami, Florida
| | - Jean L Wright
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, Baltimore, Maryland
| | - Robert B Hines
- Department of Population Health Sciences, University of Central Florida College of Medicine, Orlando, Florida
| | - Jennifer J Hu
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, Florida; Department of Public Health Sciences, University of Miami Miller School of Medicine, Miami, Florida.
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22
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Hu G, Wang S, Wang Y, Gao Y, Zhu H, Liu M, Xu N, Wang L. Clinical and functional significance of CHK1-S, an alternatively spliced isoform of the CHK1 gene, in hepatocellular carcinoma. J Cancer 2020; 11:1792-1799. [PMID: 32194790 PMCID: PMC7052871 DOI: 10.7150/jca.39443] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Accepted: 12/01/2019] [Indexed: 12/24/2022] Open
Abstract
Alternative splicing plays critical roles in many disease processes and splicing dysregulation is a hallmark of cancer. The different splicing isoforms may have significantly different effects on the malignant progression of cancer. Checkpoint kinase 1 (CHK1) is a serine/threonine kinase and regulates DNA damage response. In this study, we measured the expression of an alternative CHK1 transcript (CHK1-S, excluded exon 3) in hepatocellular carcinoma (HCC) tissues. Our results showed that CHK1-S was significantly upregulated in HCC tissues compared with paired adjacent noncancerous hepatic tissues. The levels of full-length CHK1(CHK1-L), CHK1-S and the ratio of CHK1-S/L in tumor tissue were associated with relapse free survival (RFS) of postoperative HCC patients, respectively, but not the levels of CHK1-L, CHK1-S and the ratio of CHK1-S/L in adjacent normal tissue. To further demonstrate the role of CHK1-S in HCC, CCK-8 assays, EdU incorporation assays and colony formation assays were used. The results showed that overexpression of CHK1-S significantly accelerated HCC cell proliferation, compared with CHK1-L. In addition, we found that serine-arginine protein kinase 1 (SRPK1), as an upstream regulator kinase of splicing factor, could upregulate the expression of CHK1-S and its expression level was significantly higher in HCC tumors than the paired normal tissues and was associated with the levels of CHK1-S (P=0.016). In conclusion, our study demonstrated that CHK1-S, acts as an oncogene, which was upregulated and associated with RFS in HCC patients. SRPK1 may mediate its mRNA splicing in HCC. All these data indicated that the expression of CHK1-S would have potential prognostic values and splicing kinase SRPK1 might be developed as therapeutic target in HCC.
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Affiliation(s)
- Guanghui Hu
- Laboratory of Cell and Molecular Biology & State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Shuren Wang
- Laboratory of Cell and Molecular Biology & State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yu Wang
- Laboratory of Cell and Molecular Biology & State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yang Gao
- Laboratory of Cell and Molecular Biology & State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Hongxia Zhu
- Laboratory of Cell and Molecular Biology & State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Mei Liu
- Laboratory of Cell and Molecular Biology & State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Ningzhi Xu
- Laboratory of Cell and Molecular Biology & State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Liming Wang
- Department of Hepatobiliary Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College
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Jiao R, Xu F, Huang X, Li H, Liu W, Cao H, Zang L, Li Z, Hua H, Li D. Antiproliferative chromone derivatives induce K562 cell death through endogenous and exogenous pathways. J Enzyme Inhib Med Chem 2020; 35:759-772. [PMID: 32183548 PMCID: PMC7144234 DOI: 10.1080/14756366.2020.1740696] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
A series of furoxan derivatives of chromone were prepared. The antiproliferative activities were tested against five cancer cell lines HepG2, MCF-7, HCT-116, B16, and K562, and two normal human cell lines L-02 and PBMCs. Among them, compound 15a exhibited the most potent antiproliferative activity. It was also found 15a produced more than 8 µM of NO at the peak time of 45 min by Griess assay. Generally, antiproliferative activity is positively related to NO release to some extent. Further in-depth studies on apoptosis-related mechanisms showed that 15a caused S-phase cell cycle arrest in a concentration-dependent manner and induced apoptosis significantly through mitochondria-related pathways. Human apoptosis protein array assay also demonstrated 15a increased the expression levels of pro-apoptotic Bax, Bad, HtrA2 and Trail R2/DR5. The expression of catalase and cell cycle blocker claspin were similarly up-regulated. In balance, 15a induced K562 cells death through both endogenous and exogenous pathways.
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Affiliation(s)
- Runwei Jiao
- Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, P. R. China
| | - Fanxing Xu
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, P. R. China
| | - Xiaofang Huang
- Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, P. R. China
| | - Haonan Li
- Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, P. R. China
| | - Weiwei Liu
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, P. R. China
| | - Hao Cao
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenyang, P. R. China
| | - Linghe Zang
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenyang, P. R. China
| | - Zhanlin Li
- Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, P. R. China
| | - Huiming Hua
- Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, P. R. China
| | - Dahong Li
- Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, P. R. China
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Erber J, Steiner JD, Isensee J, Lobbes LA, Toschka A, Beleggia F, Schmitt A, Kaiser RWJ, Siedek F, Persigehl T, Hucho T, Reinhardt HC. Dual Inhibition of GLUT1 and the ATR/CHK1 Kinase Axis Displays Synergistic Cytotoxicity in KRAS-Mutant Cancer Cells. Cancer Res 2019; 79:4855-4868. [PMID: 31405847 DOI: 10.1158/0008-5472.can-18-3959] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 06/18/2019] [Accepted: 08/06/2019] [Indexed: 11/16/2022]
Abstract
The advent of molecularly targeted therapeutic agents has opened a new era in cancer therapy. However, many tumors rely on nondruggable cancer-driving lesions. In addition, long-lasting clinical benefits from single-agent therapies rarely occur, as most of the tumors acquire resistance over time. The identification of targeted combination regimens interfering with signaling through oncogenically rewired pathways provides a promising approach to enhance efficacy of single-agent-targeted treatments. Moreover, combination drug therapies might overcome the emergence of drug resistance. Here, we performed a focused flow cytometry-based drug synergy screen and identified a novel synergistic interaction between GLUT1-mediated glucose transport and the cell-cycle checkpoint kinases ATR and CHK1. Combined inhibition of CHK1/GLUT1 or ATR/GLUT1 robustly induced apoptosis, particularly in RAS-mutant cancer cells. Mechanistically, combined inhibition of ATR/CHK1 and GLUT1 arrested sensitive cells in S-phase and led to the accumulation of genotoxic damage, particularly in S-phase. In vivo, simultaneous inhibition of ATR and GLUT1 significantly reduced tumor volume gain in an autochthonous mouse model of KrasG12D -driven soft tissue sarcoma. Taken together, these findings pave the way for combined inhibition of GLUT1 and ATR/CHK1 as a therapeutic approach for KRAS-driven cancers. SIGNIFICANCE: Dual targeting of the DNA damage response and glucose transport synergistically induces apoptosis in KRAS-mutant cancer, suggesting this combination treatment for clinical validation in KRAS-stratified tumor patients.
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Affiliation(s)
- Johanna Erber
- Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Dusseldorf, Center for Molecular Medicine Cologne, CECAD, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany.
| | - Joachim D Steiner
- Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Dusseldorf, Center for Molecular Medicine Cologne, CECAD, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Jörg Isensee
- Translational Pain Research, Department of Anesthesiology and Intensive Care Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Leonard A Lobbes
- Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Dusseldorf, Center for Molecular Medicine Cologne, CECAD, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - André Toschka
- Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Dusseldorf, Center for Molecular Medicine Cologne, CECAD, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Filippo Beleggia
- Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Dusseldorf, Center for Molecular Medicine Cologne, CECAD, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Anna Schmitt
- Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Dusseldorf, Center for Molecular Medicine Cologne, CECAD, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Rainer W J Kaiser
- Department II of Internal Medicine and Center for Molecular Medicine Cologne, CECAD, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Florian Siedek
- Institute of Diagnostic and Interventional Radiology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Thorsten Persigehl
- Institute of Diagnostic and Interventional Radiology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Tim Hucho
- Translational Pain Research, Department of Anesthesiology and Intensive Care Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Hans C Reinhardt
- Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Dusseldorf, Center for Molecular Medicine Cologne, CECAD, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany.
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Schuler F, Afreen S, Manzl C, Häcker G, Erlacher M, Villunger A. Checkpoint kinase 1 is essential for fetal and adult hematopoiesis. EMBO Rep 2019; 20:e47026. [PMID: 31379128 PMCID: PMC6680171 DOI: 10.15252/embr.201847026] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 05/22/2019] [Accepted: 05/24/2019] [Indexed: 12/15/2022] Open
Abstract
Checkpoint kinase 1 (CHK1) is critical for S-phase fidelity and preventing premature mitotic entry in the presence of DNA damage. Tumor cells have developed a strong dependence on CHK1 for survival, and hence, this kinase has developed into a promising drug target. Chk1 deficiency in mice results in blastocyst death due to G2/M checkpoint failure showing that it is an essential gene and may be difficult to target therapeutically. Here, we show that chemical inhibition of CHK1 kills murine and human hematopoietic stem and progenitor cells (HSPCs) by the induction of BCL2-regulated apoptosis. Cell death in HSPCs is independent of p53 but requires the BH3-only proteins BIM, PUMA, and NOXA. Moreover, Chk1 is essential for definitive hematopoiesis in the embryo. Noteworthy, cell death inhibition in HSPCs cannot restore blood cell formation as HSPCs lacking CHK1 accumulate DNA damage and stop dividing. Moreover, conditional deletion of Chk1 in hematopoietic cells of adult mice selects for blood cells retaining CHK1, suggesting an essential role in maintaining functional hematopoiesis. Our findings establish a previously unrecognized role for CHK1 in establishing and maintaining hematopoiesis.
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Affiliation(s)
- Fabian Schuler
- Division of Developmental ImmunologyBiocenterMedical University of InnsbruckInnsbruckAustria
| | - Sehar Afreen
- Division of Pediatric Hematology and OncologyDepartment of Pediatrics and Adolescent MedicineFaculty of MedicineUniversity of FreiburgFreiburgGermany
- Faculty of BiologyUniversity of FreiburgFreiburgGermany
| | - Claudia Manzl
- Institute of Pathology, Neuropathology and Molecular pathologyMedical University of InnsbruckInnsbruckAustria
| | - Georg Häcker
- Institute of Medical Microbiology and HygieneUniversity Medical Center FreiburgFreiburgGermany
| | - Miriam Erlacher
- Division of Pediatric Hematology and OncologyDepartment of Pediatrics and Adolescent MedicineFaculty of MedicineUniversity of FreiburgFreiburgGermany
- German Cancer Consortium (DKTK)FreiburgGermany
- German Cancer Research Center (DKFZ)HeidelbergGermany
| | - Andreas Villunger
- Division of Developmental ImmunologyBiocenterMedical University of InnsbruckInnsbruckAustria
- CeMM Research Center for Molecular Medicine of the Austrian Academy of SciencesViennaAustria
- Ludwig Boltzmann Institute for Rare and Undiagnosed DiseasesViennaAustria
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26
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Michelena J, Gatti M, Teloni F, Imhof R, Altmeyer M. Basal CHK1 activity safeguards its stability to maintain intrinsic S-phase checkpoint functions. J Cell Biol 2019; 218:2865-2875. [PMID: 31366665 PMCID: PMC6719454 DOI: 10.1083/jcb.201902085] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 06/12/2019] [Accepted: 07/08/2019] [Indexed: 12/11/2022] Open
Abstract
The essential kinase CHK1 controls cell cycle checkpoint signaling and S-phase progression. Michelena et al. reveal that steady-state activity of CHK1 is required to sustain its own stability and that failure to do so results in CHK1 degradation and sensitizes cells to replication stress. The DNA replication machinery frequently encounters impediments that slow replication fork progression and threaten timely and error-free replication. The CHK1 protein kinase is essential to deal with replication stress (RS) and ensure genome integrity and cell survival, yet how basal levels and activity of CHK1 are maintained under physiological, unstressed conditions is not well understood. Here, we reveal that CHK1 stability is controlled by its steady-state activity during unchallenged cell proliferation. This autoactivatory mechanism, which depends on ATR and its coactivator ETAA1 and is tightly associated with CHK1 autophosphorylation at S296, counters CHK1 ubiquitylation and proteasomal degradation, thereby preventing attenuation of S-phase checkpoint functions and a compromised capacity to respond to RS. Based on these findings, we propose that steady-state CHK1 activity safeguards its stability to maintain intrinsic checkpoint functions and ensure genome integrity and cell survival.
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Affiliation(s)
- Jone Michelena
- Department of Molecular Mechanisms of Disease, University of Zurich, Zurich, Switzerland
| | - Marco Gatti
- Department of Molecular Mechanisms of Disease, University of Zurich, Zurich, Switzerland
| | - Federico Teloni
- Department of Molecular Mechanisms of Disease, University of Zurich, Zurich, Switzerland.,Molecular Life Sciences Program, Life Science Zurich Graduate School, Zurich, Switzerland
| | - Ralph Imhof
- Department of Molecular Mechanisms of Disease, University of Zurich, Zurich, Switzerland
| | - Matthias Altmeyer
- Department of Molecular Mechanisms of Disease, University of Zurich, Zurich, Switzerland
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27
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Songyang Y, Zhu W, Liu C, Li LL, Hu W, Zhou Q, Zhang H, Li W, Li D. Large-scale gene expression analysis reveals robust gene signatures for prognosis prediction in lung adenocarcinoma. PeerJ 2019; 7:e6980. [PMID: 31198635 PMCID: PMC6553445 DOI: 10.7717/peerj.6980] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 04/18/2019] [Indexed: 12/30/2022] Open
Abstract
Lung adenocarcinoma (LUAD) is the leading cause of cancer-related death worldwide. High mortality in LUAD motivates us to stratify the patients into high- and low-risk groups, which is beneficial for the clinicians to design a personalized therapeutic regimen. To robustly predict the risk, we identified a set of robust prognostic gene signatures and critical pathways based on ten gene expression datasets by the meta-analysis-based Cox regression model, 25 of which were selected as predictors of multivariable Cox regression model by MMPC algorithm. Gene set enrichment analysis (GSEA) identified the Aurora-A pathway, the Aurora-B pathway, and the FOXM1 transcription factor network as prognostic pathways in LUAD. Moreover, the three prognostic pathways were also the biological processes of G2-M transition, suggesting that hyperactive G2-M transition in cell cycle was an indicator of poor prognosis in LUAD. The validation in the independent datasets suggested that overall survival differences were observed not only in all LUAD patients, but also in those with a specific TNM stage, gender, and age group. The comprehensive analysis demonstrated that prognostic signatures and the prognostic model by the large-scale gene expression analysis were more robust than models built by single data based gene signatures in LUAD overall survival prediction.
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Affiliation(s)
- Yiyan Songyang
- Department of Occupational and Environmental Health, School of Public Health, Wuhan University, Wuhan, China
| | - Wei Zhu
- Department of Occupational and Environmental Health, School of Public Health, Wuhan University, Wuhan, China
| | - Cong Liu
- Department of Occupational and Environmental Health, School of Public Health, Wuhan University, Wuhan, China
| | - Lin-Lin Li
- Department of Occupational and Environmental Health, School of Public Health, Wuhan University, Wuhan, China
| | - Wei Hu
- Department of Occupational and Environmental Health, School of Public Health, Wuhan University, Wuhan, China
| | - Qun Zhou
- Department of Occupational and Environmental Health, School of Public Health, Wuhan University, Wuhan, China
| | - Han Zhang
- Department of Occupational and Environmental Health, School of Public Health, Wuhan University, Wuhan, China
| | - Wen Li
- Department of Emergency, Renmin Hospital of Wuhan University, Wuhan, China
| | - Dejia Li
- Department of Occupational and Environmental Health, School of Public Health, Wuhan University, Wuhan, China
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28
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Lopes JL, Chaudhry S, Lopes GS, Levin NK, Tainsky MA. FANCM, RAD1, CHEK1 and TP53I3 act as BRCA-like tumor suppressors and are mutated in hereditary ovarian cancer. Cancer Genet 2019; 235-236:57-64. [PMID: 31078449 DOI: 10.1016/j.cancergen.2019.04.061] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 03/27/2019] [Accepted: 04/18/2019] [Indexed: 11/29/2022]
Abstract
Although 25% of ovarian cancer cases are due to inherited factors, most of the genetic risk remains unexplained. We previously identified candidate genes through germline whole exome sequencing of BRCA1/BRCA2 negative ovarian cancer patients with familial risk. Here, we performed functional assessment to determine whether they act as BRCA-like tumor suppressors. Seven candidate risk genes were targeted by siRNA for mRNA depletion followed by functional assays for clonogenic survival, cytotoxicity to DNA damaging agents, and involvement in homologous recombination repair. BRCA1 and BRCA1 were targeted as standards for loss of function outcome. Knockdown of various candidate genes led to tumor suppressor phenotypes also observed in BRCA1/BRCA2 deficient cells. Deficiency of CHEK1, FANCM and TP53I3 led to reduced homologous recombination repair efficiency. Knockdown of RAD1, CHEK1 or FANCM led to a decrease in cellular viability and cells deficient in CHEK1, RAD1 or TP53I3 displayed increased sensitivity to cisplatin. Functional studies of candidate genes identified by whole exome sequencing complements bioinformatics techniques and aid the implication of novel risk loci. The results of this study suggest that genes found mutated in hereditary ovarian cancer, FANCM, RAD1, CHEK1 and TP53I3, act as BRCA-like tumor suppressors.
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Affiliation(s)
- Jaime L Lopes
- Center for Molecular Medicine and Genetics and Department of Oncology, Wayne State University School of Medicine, 421 E. Canfield Street, Suite 3126, Detroit, MI 48201, USA; Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Sophia Chaudhry
- Center for Molecular Medicine and Genetics and Department of Oncology, Wayne State University School of Medicine, 421 E. Canfield Street, Suite 3126, Detroit, MI 48201, USA
| | - Guilherme S Lopes
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Nancy K Levin
- Center for Molecular Medicine and Genetics and Department of Oncology, Wayne State University School of Medicine, 421 E. Canfield Street, Suite 3126, Detroit, MI 48201, USA
| | - Michael A Tainsky
- Center for Molecular Medicine and Genetics and Department of Oncology, Wayne State University School of Medicine, 421 E. Canfield Street, Suite 3126, Detroit, MI 48201, USA.
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29
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Schoeler K, Jakic B, Heppke J, Soratroi C, Aufschnaiter A, Hermann-Kleiter N, Villunger A, Labi V. CHK1 dosage in germinal center B cells controls humoral immunity. Cell Death Differ 2019; 26:2551-2567. [PMID: 30894677 DOI: 10.1038/s41418-019-0318-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 02/18/2019] [Accepted: 02/27/2019] [Indexed: 01/02/2023] Open
Abstract
Germinal center (GC) B cells are among the fastest replicating cells in our body, dividing every 4-8 h. DNA replication errors are intrinsically toxic to cells. How GC B cells exert control over the DNA damage response while introducing mutations in their antibody genes is poorly understood. Here, we show that the DNA damage response regulator Checkpoint kinase 1 (CHK1) is essential for GC B cell survival. Remarkably, effective antibody-mediated immunity relies on optimal CHK1 dosage. Chemical CHK1 inhibition or loss of one Chk1 allele impairs the survival of class-switched cells and curbs the amplitude of antibody production. Mechanistically, active B cell receptor signaling wires the outcome of CHK1-inhibition towards BIM-dependent apoptosis, whereas T cell help favors temporary cell cycle arrest. Our results predict that therapeutic CHK1 inhibition in cancer patients may prove potent in killing B cell lymphoma and leukemia cells addicted to B cell receptor signaling, but will most likely dampen humoral immunity.
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Affiliation(s)
- Katia Schoeler
- Division of Developmental Immunology, Biocenter, Medical University of Innsbruck, Innsbruck, 6020, Austria
| | - Bojana Jakic
- Division of Translational Cell Genetics, Department for Pharmacology and Genetics, Medical University of Innsbruck, Innsbruck, 6020, Austria
| | - Julia Heppke
- Division of Developmental Immunology, Biocenter, Medical University of Innsbruck, Innsbruck, 6020, Austria
| | - Claudia Soratroi
- Division of Developmental Immunology, Biocenter, Medical University of Innsbruck, Innsbruck, 6020, Austria
| | - Andreas Aufschnaiter
- Division of Developmental Immunology, Biocenter, Medical University of Innsbruck, Innsbruck, 6020, Austria
| | - Natascha Hermann-Kleiter
- Division of Translational Cell Genetics, Department for Pharmacology and Genetics, Medical University of Innsbruck, Innsbruck, 6020, Austria
| | - Andreas Villunger
- Division of Developmental Immunology, Biocenter, Medical University of Innsbruck, Innsbruck, 6020, Austria.,CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, 1090, Austria.,Ludwig Boltzmann Institute for Rare and Undiagnosed Diseases, Vienna, 1090, Austria
| | - Verena Labi
- Division of Developmental Immunology, Biocenter, Medical University of Innsbruck, Innsbruck, 6020, Austria.
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30
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Bianco JN, Bergoglio V, Lin YL, Pillaire MJ, Schmitz AL, Gilhodes J, Lusque A, Mazières J, Lacroix-Triki M, Roumeliotis TI, Choudhary J, Moreaux J, Hoffmann JS, Tourrière H, Pasero P. Overexpression of Claspin and Timeless protects cancer cells from replication stress in a checkpoint-independent manner. Nat Commun 2019; 10:910. [PMID: 30796221 PMCID: PMC6385232 DOI: 10.1038/s41467-019-08886-8] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 02/05/2019] [Indexed: 12/31/2022] Open
Abstract
Oncogene-induced replication stress (RS) promotes cancer development but also impedes tumor growth by activating anti-cancer barriers. To determine how cancer cells adapt to RS, we have monitored the expression of different components of the ATR-CHK1 pathway in primary tumor samples. We show that unlike upstream components of the pathway, the checkpoint mediators Claspin and Timeless are overexpressed in a coordinated manner. Remarkably, reducing the levels of Claspin and Timeless in HCT116 cells to pretumoral levels impeded fork progression without affecting checkpoint signaling. These data indicate that high level of Claspin and Timeless increase RS tolerance by protecting replication forks in cancer cells. Moreover, we report that primary fibroblasts adapt to oncogene-induced RS by spontaneously overexpressing Claspin and Timeless, independently of ATR signaling. Altogether, these data indicate that enhanced levels of Claspin and Timeless represent a gain of function that protects cancer cells from of oncogene-induced RS in a checkpoint-independent manner.
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Affiliation(s)
- Julien N Bianco
- Institut de Génétique Humaine, CNRS, Université de Montpellier, Equipe Labellisée Ligue Contre le Cancer, 34396, Montpellier, France.,Cologne Excellence Cluster for Cellular Stress Responses in Ageing-Associated Diseases (CECAD), University of Cologne, Joseph-Stelzmann-Str. 26, 50931, Cologne, Germany
| | - Valérie Bergoglio
- Cancer Research Center of Toulouse, INSERM U1037, CNRS ERL5294, University of Toulouse 3, 31037, Toulouse, France
| | - Yea-Lih Lin
- Institut de Génétique Humaine, CNRS, Université de Montpellier, Equipe Labellisée Ligue Contre le Cancer, 34396, Montpellier, France
| | - Marie-Jeanne Pillaire
- Cancer Research Center of Toulouse, INSERM U1037, CNRS ERL5294, University of Toulouse 3, 31037, Toulouse, France
| | - Anne-Lyne Schmitz
- Institut de Génétique Humaine, CNRS, Université de Montpellier, Equipe Labellisée Ligue Contre le Cancer, 34396, Montpellier, France
| | - Julia Gilhodes
- Clinical trials Office - Biostatistics Unit, Institute Claudius Regaud, Institute Universitaire du Cancer Toulouse-Oncopole (IUCT-O), 31100, Toulouse, France
| | - Amelie Lusque
- Clinical trials Office - Biostatistics Unit, Institute Claudius Regaud, Institute Universitaire du Cancer Toulouse-Oncopole (IUCT-O), 31100, Toulouse, France
| | - Julien Mazières
- Thoracic Oncology Department, Toulouse University Hospital, University Paul Sabatier, 31062, Toulouse, France
| | | | | | | | - Jérôme Moreaux
- Institut de Génétique Humaine, CNRS, Université de Montpellier, Equipe Labellisée Ligue Contre le Cancer, 34396, Montpellier, France
| | - Jean-Sébastien Hoffmann
- Cancer Research Center of Toulouse, INSERM U1037, CNRS ERL5294, University of Toulouse 3, 31037, Toulouse, France
| | - Hélène Tourrière
- Institut de Génétique Humaine, CNRS, Université de Montpellier, Equipe Labellisée Ligue Contre le Cancer, 34396, Montpellier, France.
| | - Philippe Pasero
- Institut de Génétique Humaine, CNRS, Université de Montpellier, Equipe Labellisée Ligue Contre le Cancer, 34396, Montpellier, France.
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31
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Abe H, Alavattam KG, Kato Y, Castrillon DH, Pang Q, Andreassen PR, Namekawa SH. CHEK1 coordinates DNA damage signaling and meiotic progression in the male germline of mice. Hum Mol Genet 2019; 27:1136-1149. [PMID: 29360988 DOI: 10.1093/hmg/ddy022] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 01/09/2018] [Indexed: 12/22/2022] Open
Abstract
The continuity of life depends on mechanisms in the germline that ensure the integrity of the genome. The DNA damage response/checkpoint kinases ATM and ATR are essential signaling factors in the germline. However, it remains unknown how a downstream transducer, Checkpoint Kinase 1 (CHEK1 or CHK1), mediates signaling in the male germline. Here, we show that CHEK1 has distinct functions in both the mitotic and meiotic phases of the male germline in mice. In the mitotic phase, CHEK1 is required for the resumption of prospermatogonia proliferation after birth and the maintenance of spermatogonia. In the meiotic phase, we uncovered two functions for CHEK1: one is the stage-specific attenuation of DNA damage signaling on autosomes, and the other is coordination of meiotic stage progression. On autosomes, the loss of CHEK1 delays the removal of DNA damage signaling that manifests as phosphorylation of histone variant H2AX at serine 139 (γH2AX). Importantly, CHEK1 does not have a direct function in meiotic sex chromosome inactivation (MSCI), an essential event in male meiosis, in which ATR is a key regulator. Thus, the functions of ATR and CHEK1 are uncoupled in MSCI, in contrast to their roles in DNA damage signaling in somatic cells. Our study reveals stage-specific functions for CHEK1 that ensure the integrity of the male germline.
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Affiliation(s)
- Hironori Abe
- Division of Reproductive Sciences, Division of Developmental Biology, Perinatal Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Kris G Alavattam
- Division of Reproductive Sciences, Division of Developmental Biology, Perinatal Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Yasuko Kato
- Division of Reproductive Sciences, Division of Developmental Biology, Perinatal Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Diego H Castrillon
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Qishen Pang
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA.,Division of Experimental Hematology & Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, 45229, USA
| | - Paul R Andreassen
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA.,Division of Experimental Hematology & Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, 45229, USA
| | - Satoshi H Namekawa
- Division of Reproductive Sciences, Division of Developmental Biology, Perinatal Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
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32
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Goto H, Natsume T, Kanemaki MT, Kaito A, Wang S, Gabazza EC, Inagaki M, Mizoguchi A. Chk1-mediated Cdc25A degradation as a critical mechanism for normal cell cycle progression. J Cell Sci 2019; 132:jcs.223123. [PMID: 30635443 DOI: 10.1242/jcs.223123] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 01/02/2019] [Indexed: 12/13/2022] Open
Abstract
Chk1 (encoded by CHEK1 in mammals) is an evolutionarily conserved protein kinase that transduces checkpoint signals from ATR to Cdc25A during the DNA damage response (DDR). In mammals, Chk1 also controls cellular proliferation even in the absence of exogenous DNA damage. However, little is known about how Chk1 regulates unperturbed cell cycle progression, and how this effect under physiological conditions differs from its regulatory role in DDR. Here, we have established near-diploid HCT116 cell lines containing endogenous Chk1 protein tagged with a minimum auxin-inducible degron (mAID) through CRISPR/Cas9-based gene editing. Establishment of these cells enabled us to induce specific and rapid depletion of the endogenous Chk1 protein, which resulted in aberrant accumulation of DNA damage factors that induced cell cycle arrest at S or G2 phase. Cdc25A was stabilized upon Chk1 depletion before the accumulation of DNA damage factors. Simultaneous depletion of Chk1 and Cdc25A partially suppressed the defects caused by Chk1 single depletion. These results indicate that, similar to its function in DDR, Chk1 controls normal cell cycle progression mainly by inducing Cdc25A degradation.
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Affiliation(s)
- Hidemasa Goto
- Department of Neural Regeneration and Cell Communication, Mie University Graduate School of Medicine, Tsu, Mie 514-8507, Japan
| | - Toyoaki Natsume
- Department of Chromosome Science, National Institute of Genetics, Research Organization of Information and Systems (ROIS), Mishima, Shizuoka 411-8540, Japan.,Department of Genetics, The Graduate University for Advanced Studies (SOKENDAI), Mishima, Shizuoka 411-8540, Japan
| | - Masato T Kanemaki
- Department of Chromosome Science, National Institute of Genetics, Research Organization of Information and Systems (ROIS), Mishima, Shizuoka 411-8540, Japan.,Department of Genetics, The Graduate University for Advanced Studies (SOKENDAI), Mishima, Shizuoka 411-8540, Japan
| | - Aika Kaito
- Department of Physiology, Mie University Graduate School of Medicine, Tsu, Mie 514-8507, Japan
| | - Shujie Wang
- Department of Neural Regeneration and Cell Communication, Mie University Graduate School of Medicine, Tsu, Mie 514-8507, Japan
| | - Esteban C Gabazza
- Department of Immunology, Mie University Graduate School of Medicine, Tsu, Mie 514-8507, Japan
| | - Masaki Inagaki
- Department of Physiology, Mie University Graduate School of Medicine, Tsu, Mie 514-8507, Japan
| | - Akira Mizoguchi
- Department of Neural Regeneration and Cell Communication, Mie University Graduate School of Medicine, Tsu, Mie 514-8507, Japan
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33
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Adam K, Cartel M, Lambert M, David L, Yuan L, Besson A, Mayeux P, Manenti S, Didier C. A PIM-CHK1 signaling pathway regulates PLK1 phosphorylation and function during mitosis. J Cell Sci 2018; 131:jcs213116. [PMID: 29976560 DOI: 10.1242/jcs.213116] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 06/15/2018] [Indexed: 11/20/2022] Open
Abstract
Although the kinase CHK1 is a key player in the DNA damage response (DDR), several studies have recently provided evidence of DDR-independent roles of CHK1, in particular following phosphorylation of its S280 residue. Here, we demonstrate that CHK1 S280 phosphorylation is cell cycle-dependent and peaks during mitosis. We found that this phosphorylation was catalyzed by the kinase PIM2, whose protein expression was also increased during mitosis. Importantly, we identified polo-like kinase 1 (PLK1) as a direct target of CHK1 during mitosis. Genetic or pharmacological inhibition of CHK1 reduced the activating phosphorylation of PLK1 on T210, and recombinant CHK1 was able to phosphorylate T210 of PLK1 in vitro Accordingly, S280-phosphorylated CHK1 and PLK1 exhibited similar specific mitotic localizations, and PLK1 was co-immunoprecipitated with S280-phosphorylated CHK1 from mitotic cell extracts. Moreover, CHK1-mediated phosphorylation of PLK1 was dependent on S280 phosphorylation by PIM2. Inhibition of PIM proteins reduced cell proliferation and mitotic entry, which was rescued by expressing a T210D phosphomimetic mutant of PLK1. Altogether, these data identify a new PIM-CHK1-PLK1 phosphorylation cascade that regulates different mitotic steps independently of the CHK1 DDR function.This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Kévin Adam
- Institut Cochin, INSERM U1016, CNRS UMR 8104, Université Paris Descartes, 75014 Paris, France
- Ligue Nationale Contre le Cancer, équipe labellisée
| | - Maëlle Cartel
- Ligue Nationale Contre le Cancer, équipe labellisée
- Cancer Research Center of Toulouse, INSERM U1037, CNRS ERL 5294, Université de Toulouse, 31100 Toulouse, France
| | - Mireille Lambert
- Institut Cochin, INSERM U1016, CNRS UMR 8104, Université Paris Descartes, 75014 Paris, France
- Ligue Nationale Contre le Cancer, équipe labellisée
| | - Laure David
- Ligue Nationale Contre le Cancer, équipe labellisée
- Cancer Research Center of Toulouse, INSERM U1037, CNRS ERL 5294, Université de Toulouse, 31100 Toulouse, France
| | - Lingli Yuan
- Department of Hematology, The Second Xiangya Hospital, Central South University, No.139 Renmin Middle Road, Furong, Changsha, Hunan 410011, China
| | - Arnaud Besson
- Cancer Research Center of Toulouse, INSERM U1037, CNRS ERL 5294, Université de Toulouse, 31100 Toulouse, France
| | - Patrick Mayeux
- Institut Cochin, INSERM U1016, CNRS UMR 8104, Université Paris Descartes, 75014 Paris, France
- Ligue Nationale Contre le Cancer, équipe labellisée
| | - Stéphane Manenti
- Ligue Nationale Contre le Cancer, équipe labellisée
- Cancer Research Center of Toulouse, INSERM U1037, CNRS ERL 5294, Université de Toulouse, 31100 Toulouse, France
| | - Christine Didier
- Ligue Nationale Contre le Cancer, équipe labellisée
- Cancer Research Center of Toulouse, INSERM U1037, CNRS ERL 5294, Université de Toulouse, 31100 Toulouse, France
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34
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35
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Gómez-Escoda B, Wu PYJ. The organization of genome duplication is a critical determinant of the landscape of genome maintenance. Genome Res 2018; 28:1179-1192. [PMID: 29934426 PMCID: PMC6071636 DOI: 10.1101/gr.224527.117] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Accepted: 06/21/2018] [Indexed: 12/15/2022]
Abstract
Genome duplication is essential for cell proliferation, and the mechanisms regulating its execution are highly conserved. These processes give rise to a spatiotemporal organization of replication initiation across the genome, referred to as the replication program. Despite the identification of such programs in diverse eukaryotic organisms, their biological importance for cellular physiology remains largely unexplored. We address this fundamental question in the context of genome maintenance, taking advantage of the inappropriate origin firing that occurs when fission yeast cells lacking the Rad3/ATR checkpoint kinase are subjected to replication stress. Using this model, we demonstrate that the replication program quantitatively dictates the extent of origin de-regulation and the clustered localization of these events. Furthermore, our results uncover an accumulation of abnormal levels of single-stranded DNA (ssDNA) and the Rad52 repair protein at de-regulated origins. We show that these loci constitute a defining source of the overall ssDNA and Rad52 hotspots in the genome, generating a signature pattern of instability along the chromosomes. We then induce a genome-wide reprogramming of origin usage and evaluate its consequences in our experimental system. This leads to a complete redistribution of the sites of both inappropriate initiation and associated Rad52 recruitment. We therefore conclude that the organization of genome duplication governs the checkpoint control of origin-associated hotspots of instability and plays an integral role in shaping the landscape of genome maintenance.
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Affiliation(s)
- Blanca Gómez-Escoda
- CNRS, University of Rennes, Institute of Genetics and Development of Rennes, 35043 Rennes, France
| | - Pei-Yun Jenny Wu
- CNRS, University of Rennes, Institute of Genetics and Development of Rennes, 35043 Rennes, France
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36
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Manic G, Signore M, Sistigu A, Russo G, Corradi F, Siteni S, Musella M, Vitale S, De Angelis ML, Pallocca M, Amoreo CA, Sperati F, Di Franco S, Barresi S, Policicchio E, De Luca G, De Nicola F, Mottolese M, Zeuner A, Fanciulli M, Stassi G, Maugeri-Saccà M, Baiocchi M, Tartaglia M, Vitale I, De Maria R. CHK1-targeted therapy to deplete DNA replication-stressed, p53-deficient, hyperdiploid colorectal cancer stem cells. Gut 2018; 67:903-917. [PMID: 28389531 PMCID: PMC5890648 DOI: 10.1136/gutjnl-2016-312623] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 02/03/2017] [Accepted: 02/28/2017] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Cancer stem cells (CSCs) are responsible for tumour formation and spreading, and their targeting is required for tumour eradication. There are limited therapeutic options for advanced colorectal cancer (CRC), particularly for tumours carrying RAS-activating mutations. The aim of this study was to identify novel CSC-targeting strategies. DESIGN To discover potential therapeutics to be clinically investigated as single agent, we performed a screening with a panel of FDA-approved or investigational drugs on primary CRC cells enriched for CSCs (CRC-SCs) isolated from 27 patients. Candidate predictive biomarkers of efficacy were identified by integrating genomic, reverse-phase protein microarray (RPPA) and cytogenetic analyses, and validated by immunostainings. DNA replication stress (RS) was increased by employing DNA replication-perturbing or polyploidising agents. RESULTS The drug-library screening led to the identification of LY2606368 as a potent anti-CSC agent acting in vitro and in vivo in tumour cells from a considerable number of patients (∼36%). By inhibiting checkpoint kinase (CHK)1, LY2606368 affected DNA replication in most CRC-SCs, including RAS-mutated ones, forcing them into premature, lethal mitoses. Parallel genomic, RPPA and cytogenetic analyses indicated that CRC-SCs sensitive to LY2606368 displayed signs of ongoing RS response, including the phosphorylation of RPA32 and ataxia telangiectasia mutated serine/threonine kinase (ATM). This was associated with mutation(s) in TP53 and hyperdiploidy, and made these CRC-SCs exquisitely dependent on CHK1 function. Accordingly, experimental increase of RS sensitised resistant CRC-SCs to LY2606368. CONCLUSIONS LY2606368 selectively eliminates replication-stressed, p53-deficient and hyperdiploid CRC-SCs independently of RAS mutational status. These results provide a strong rationale for biomarker-driven clinical trials with LY2606368 in patients with CRC.
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Affiliation(s)
- Gwenola Manic
- Department of Biology, University of Rome “Tor Vergata”, Rome, Italy
| | - Michele Signore
- Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità, Rome, Italy
| | - Antonella Sistigu
- Department of Research, Advanced Diagnostics and Technological Innovation, Regina Elena National Cancer Institute, Rome, Italy
| | - Giorgio Russo
- Department of Research, Advanced Diagnostics and Technological Innovation, Regina Elena National Cancer Institute, Rome, Italy,Institute of General Pathology, Catholic University and A. Gemelli Polyclinic, Rome, Italy
| | - Francesca Corradi
- Department of Biology, University of Rome “Tor Vergata”, Rome, Italy
| | - Silvia Siteni
- Department of Research, Advanced Diagnostics and Technological Innovation, Regina Elena National Cancer Institute, Rome, Italy,Department of Science, University “Roma Tre”, Rome, Italy
| | - Martina Musella
- Department of Research, Advanced Diagnostics and Technological Innovation, Regina Elena National Cancer Institute, Rome, Italy,Department of Molecular Medicine, University “La Sapienza”, Rome, Italy
| | - Sara Vitale
- Institute of General Pathology, Catholic University and A. Gemelli Polyclinic, Rome, Italy
| | - Maria Laura De Angelis
- Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità, Rome, Italy
| | - Matteo Pallocca
- SAFU, Department of Research, Advanced Diagnostics, and Technological Innovation, Translational Research Area, Regina Elena National Cancer Institute, RomeItaly
| | | | - Francesca Sperati
- Biostatistical Unit, Regina Elena National Cancer Institute, Rome, Italy
| | - Simone Di Franco
- Department of Surgical Oncological and Stomatological Sciences, University of Palermo, Palermo, Italy
| | - Sabina Barresi
- Genetics and Rare Diseases Research Division, Ospedale Pediatrico “Bambino Gesù”, Rome, Italy
| | - Eleonora Policicchio
- Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità, Rome, Italy,Department of Experimental Medicine, University “La Sapienza”, Rome, Italy
| | - Gabriele De Luca
- Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità, Rome, Italy
| | - Francesca De Nicola
- SAFU, Department of Research, Advanced Diagnostics, and Technological Innovation, Translational Research Area, Regina Elena National Cancer Institute, RomeItaly
| | - Marcella Mottolese
- Department of Pathology, Regina Elena National Cancer Institute, Rome, Italy
| | - Ann Zeuner
- Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità, Rome, Italy
| | - Maurizio Fanciulli
- SAFU, Department of Research, Advanced Diagnostics, and Technological Innovation, Translational Research Area, Regina Elena National Cancer Institute, RomeItaly
| | - Giorgio Stassi
- Department of Surgical Oncological and Stomatological Sciences, University of Palermo, Palermo, Italy
| | | | - Marta Baiocchi
- Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità, Rome, Italy
| | - Marco Tartaglia
- Genetics and Rare Diseases Research Division, Ospedale Pediatrico “Bambino Gesù”, Rome, Italy
| | - Ilio Vitale
- Department of Biology, University of Rome “Tor Vergata”, Rome, Italy,Department of Research, Advanced Diagnostics and Technological Innovation, Regina Elena National Cancer Institute, Rome, Italy
| | - Ruggero De Maria
- Institute of General Pathology, Catholic University and A. Gemelli Polyclinic, Rome, Italy
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37
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Collin R, Doyon K, Mullins-Dansereau V, Karam M, Chabot-Roy G, Hillhouse EE, Orthwein A, Lesage S. Genetic interaction between two insulin-dependent diabetes susceptibility loci, Idd2 and Idd13, in determining immunoregulatory DN T cell proportion. Immunogenetics 2018; 70:495-509. [PMID: 29696366 DOI: 10.1007/s00251-018-1060-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 04/12/2018] [Indexed: 12/21/2022]
Abstract
Several immune regulatory cell types participate in the protection against autoimmune diseases such as autoimmune diabetes. Of these immunoregulatory cells, we and others have shown that peripheral CD4-CD8- double negative (DN) T cells can induce antigen-specific immune tolerance. Particularly, we have described that diabetes-prone mice exhibit a lower number of peripheral DN T cells compared to diabetes-resistant mice. Identifying the molecular pathways that influence the size of the DN T cell pool in peripheral lymphoid organs may thus be of interest for maintaining antigen-specific immune tolerance. Hence, through immunogenetic approaches, we found that two genetic loci linked to autoimmune diabetes susceptibility, namely Idd2 and Idd13, independently contribute to the partial restoration of DN T cell proportion in secondary lymphoid organs. We now extend these findings to show an interaction between the Idd2 and Idd13 loci in determining the number of DN T cells in secondary lymphoid organs. Using bioinformatics tools, we link potential biological pathways arising from interactions of genes encoded within the two loci. By focusing on cell cycle, we validate that both the Idd2 and Idd13 loci influence RAD51 expression as well as DN T cell progression through the cell cycle. Altogether, we find that genetic interactions between Idd2 and Idd13 loci modulate cell cycle progression, which contributes, at least in part, to defining the proportion of DN T cells in secondary lymphoid organs.
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Affiliation(s)
- Roxanne Collin
- Division of Immunology-oncology, Maisonneuve-Rosemont Hospital, Research Center, Montréal, 5415 l'Assomption Blvd, Québec, H1T 2M4, Canada.,Département de microbiologie, infectiologie et immunologie, Université de Montréal, Montréal, Québec, H3C 3J7, Canada
| | - Kathy Doyon
- Division of Immunology-oncology, Maisonneuve-Rosemont Hospital, Research Center, Montréal, 5415 l'Assomption Blvd, Québec, H1T 2M4, Canada
| | - Victor Mullins-Dansereau
- Division of Immunology-oncology, Maisonneuve-Rosemont Hospital, Research Center, Montréal, 5415 l'Assomption Blvd, Québec, H1T 2M4, Canada.,Département de microbiologie, infectiologie et immunologie, Université de Montréal, Montréal, Québec, H3C 3J7, Canada
| | - Martin Karam
- Division of Experimental Medicine, McGill University, Montréal, Québec, H4A 3J1, Canada.,Lady Davis Institute, Jewish General Hospital, 3755 Côte Ste-Catherine, Montréal, Québec, H3T 1E2, Canada
| | - Geneviève Chabot-Roy
- Division of Immunology-oncology, Maisonneuve-Rosemont Hospital, Research Center, Montréal, 5415 l'Assomption Blvd, Québec, H1T 2M4, Canada
| | - Erin E Hillhouse
- Division of Immunology-oncology, Maisonneuve-Rosemont Hospital, Research Center, Montréal, 5415 l'Assomption Blvd, Québec, H1T 2M4, Canada
| | - Alexandre Orthwein
- Division of Experimental Medicine, McGill University, Montréal, Québec, H4A 3J1, Canada. .,Lady Davis Institute, Jewish General Hospital, 3755 Côte Ste-Catherine, Montréal, Québec, H3T 1E2, Canada. .,Department of Oncology, McGill University, Montréal, Québec, H4A 3J1, Canada.
| | - Sylvie Lesage
- Division of Immunology-oncology, Maisonneuve-Rosemont Hospital, Research Center, Montréal, 5415 l'Assomption Blvd, Québec, H1T 2M4, Canada. .,Département de microbiologie, infectiologie et immunologie, Université de Montréal, Montréal, Québec, H3C 3J7, Canada.
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38
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Schuler F, Weiss JG, Lindner SE, Lohmüller M, Herzog S, Spiegl SF, Menke P, Geley S, Labi V, Villunger A. Checkpoint kinase 1 is essential for normal B cell development and lymphomagenesis. Nat Commun 2017; 8:1697. [PMID: 29167438 PMCID: PMC5700047 DOI: 10.1038/s41467-017-01850-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 10/20/2017] [Indexed: 12/20/2022] Open
Abstract
Checkpoint kinase 1 (CHK1) is critical for intrinsic cell cycle control and coordination of cell cycle progression in response to DNA damage. Despite its essential function, CHK1 has been identified as a target to kill cancer cells and studies using Chk1 haploinsufficient mice initially suggested a role as tumor suppressor. Here, we report on the key role of CHK1 in normal B-cell development, lymphomagenesis and cell survival. Chemical CHK1 inhibition induces BCL2-regulated apoptosis in primary as well as malignant B-cells and CHK1 expression levels control the timing of lymphomagenesis in mice. Moreover, total ablation of Chk1 in B-cells arrests their development at the pro-B cell stage, a block that, surprisingly, cannot be overcome by inhibition of mitochondrial apoptosis, as cell cycle arrest is initiated as an alternative fate to limit the spread of damaged DNA. Our findings define CHK1 as essential in B-cell development and potent target to treat blood cancer.
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Affiliation(s)
- Fabian Schuler
- Division of Developmental Immunology, Biocenter, Medical University of Innsbruck, Innrain 80, A-6020, Innsbruck, Austria
| | - Johannes G Weiss
- Division of Developmental Immunology, Biocenter, Medical University of Innsbruck, Innrain 80, A-6020, Innsbruck, Austria
| | - Silke E Lindner
- Division of Developmental Immunology, Biocenter, Medical University of Innsbruck, Innrain 80, A-6020, Innsbruck, Austria
| | - Michael Lohmüller
- Division of Developmental Immunology, Biocenter, Medical University of Innsbruck, Innrain 80, A-6020, Innsbruck, Austria
| | - Sebastian Herzog
- Division of Developmental Immunology, Biocenter, Medical University of Innsbruck, Innrain 80, A-6020, Innsbruck, Austria
| | - Simon F Spiegl
- Division of Molecular Pathophysiology, Biocenter, Medical University of Innsbruck, Innrain 80, A-6020, Innsbruck, Austria
| | - Philipp Menke
- Division of Molecular Pathophysiology, Biocenter, Medical University of Innsbruck, Innrain 80, A-6020, Innsbruck, Austria
| | - Stephan Geley
- Division of Molecular Pathophysiology, Biocenter, Medical University of Innsbruck, Innrain 80, A-6020, Innsbruck, Austria
| | - Verena Labi
- Division of Developmental Immunology, Biocenter, Medical University of Innsbruck, Innrain 80, A-6020, Innsbruck, Austria
| | - Andreas Villunger
- Division of Developmental Immunology, Biocenter, Medical University of Innsbruck, Innrain 80, A-6020, Innsbruck, Austria. .,Tyrolean Cancer Research Institute, Innrain 66, A-6020, Innsbruck, Austria.
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39
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Doerr F, George J, Schmitt A, Beleggia F, Rehkämper T, Hermann S, Walter V, Weber JP, Thomas RK, Wittersheim M, Büttner R, Persigehl T, Reinhardt HC. Targeting a non-oncogene addiction to the ATR/CHK1 axis for the treatment of small cell lung cancer. Sci Rep 2017; 7:15511. [PMID: 29138515 PMCID: PMC5686113 DOI: 10.1038/s41598-017-15840-5] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 11/02/2017] [Indexed: 12/19/2022] Open
Abstract
Small cell lung cancer (SCLC) is a difficult to treat subtype of lung cancer. One of the hallmarks of SCLC is its almost uniform chemotherapy sensitivity. However, chemotherapy response is typically transient and patients frequently succumb to SCLC within a year following diagnosis. We performed a transcriptome analysis of the major human lung cancer entities. We show a significant overexpression of genes involved in the DNA damage response, specifically in SCLC. Particularly CHEK1, which encodes for the cell cycle checkpoint kinase CHK1, is significantly overexpressed in SCLC, compared to lung adenocarcinoma. In line with uncontrolled cell cycle progression in SCLC, we find that CDC25A, B and C mRNAs are expressed at significantly higher levels in SCLC, compared to lung adenocarcinoma. We next profiled the efficacy of compounds targeting CHK1 and ATR. Both, ATR- and CHK1 inhibitors induce genotoxic damage and apoptosis in human and murine SCLC cell lines, but not in lung adenocarcinoma cells. We further demonstrate that murine SCLC tumors were highly sensitive to ATR- and CHK1 inhibitors, while Kras G12D -driven murine lung adenocarcinomas were resistant against these compounds and displayed continued growth under therapy. Altogether, our data indicate that SCLC displays an actionable dependence on ATR/CHK1-mediated cell cycle checkpoints.
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Affiliation(s)
- Fabian Doerr
- Department I of Internal Medicine, University Hospital of Cologne, Cologne, Germany. .,Cologne Excellence Cluster on Cellular Stress Response in Aging-Associated Diseases, University of Cologne, Cologne, Germany. .,Department of Cardiothoracic Surgery, University Hospital of Cologne, Cologne, Germany.
| | - Julie George
- Department of Translational Genomics, Center of Integrated Oncology Cologne-Bonn, Medical Faculty, University of Cologne, Cologne, Germany
| | - Anna Schmitt
- Department I of Internal Medicine, University Hospital of Cologne, Cologne, Germany.,Cologne Excellence Cluster on Cellular Stress Response in Aging-Associated Diseases, University of Cologne, Cologne, Germany
| | - Filippo Beleggia
- Department I of Internal Medicine, University Hospital of Cologne, Cologne, Germany.,Cologne Excellence Cluster on Cellular Stress Response in Aging-Associated Diseases, University of Cologne, Cologne, Germany
| | - Tim Rehkämper
- Department I of Internal Medicine, University Hospital of Cologne, Cologne, Germany.,Cologne Excellence Cluster on Cellular Stress Response in Aging-Associated Diseases, University of Cologne, Cologne, Germany
| | - Sarah Hermann
- Department I of Internal Medicine, University Hospital of Cologne, Cologne, Germany.,Cologne Excellence Cluster on Cellular Stress Response in Aging-Associated Diseases, University of Cologne, Cologne, Germany
| | - Vonn Walter
- Department of Public Health Sciences, Penn State Milton S. Hershey Medical Center, Hershey, PA, USA.,Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Jean-Philip Weber
- Department of Radiology, University Hospital of Cologne, Cologne, Germany
| | - Roman K Thomas
- Department of Translational Genomics, Center of Integrated Oncology Cologne-Bonn, Medical Faculty, University of Cologne, Cologne, Germany.,Institute for Pathology, University Hospital of Cologne, Cologne, Germany.,German Cancer Research Center, German Cancer Consortium (DKTK), Heidelberg, Germany
| | - Maike Wittersheim
- Institute for Pathology, University Hospital of Cologne, Cologne, Germany
| | - Reinhard Büttner
- Institute for Pathology, University Hospital of Cologne, Cologne, Germany
| | - Thorsten Persigehl
- Department of Radiology, University Hospital of Cologne, Cologne, Germany
| | - H Christian Reinhardt
- Department I of Internal Medicine, University Hospital of Cologne, Cologne, Germany. .,Cologne Excellence Cluster on Cellular Stress Response in Aging-Associated Diseases, University of Cologne, Cologne, Germany.
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40
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Tu Y, Liu H, Zhu X, Shen H, Ma X, Wang F, Huang M, Gong J, Li X, Wang Y, Guo C, Tang TS. Ataxin-3 promotes genome integrity by stabilizing Chk1. Nucleic Acids Res 2017; 45:4532-4549. [PMID: 28180282 PMCID: PMC5416811 DOI: 10.1093/nar/gkx095] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 02/07/2017] [Indexed: 12/27/2022] Open
Abstract
The Chk1 protein is essential for genome integrity maintenance and cell survival in eukaryotic cells. After prolonged replication stress, Chk1 can be targeted for proteasomal degradation to terminate checkpoint signaling after DNA repair finishes. To ensure proper activation of DNA damage checkpoint and DNA repair signaling, a steady-state level of Chk1 needs to be retained under physiological conditions. Here, we report a dynamic signaling pathway that tightly regulates Chk1 stability. Under unperturbed conditions and upon DNA damage, ataxin-3 (ATX3) interacts with Chk1 and protects it from DDB1/CUL4A- and FBXO6/CUL1-mediated polyubiquitination and subsequent degradation, thereby promoting DNA repair and checkpoint signaling. Under prolonged replication stress, ATX3 dissociates from Chk1, concomitant with a stronger binding between Chk1 and its E3 ligase, which causes Chk1 proteasomal degradation. ATX3 deficiency results in pronounced reduction of Chk1 abundance, compromised DNA damage response, G2/M checkpoint defect and decreased cell survival after replication stress, which can all be rescued by ectopic expression of ATX3. Taken together, these findings reveal ATX3 to be a novel deubiquitinase of Chk1, providing a new mechanism of Chk1 stabilization in genome integrity maintenance.
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Affiliation(s)
- Yingfeng Tu
- State Key Laboratory of Membrane Biology, Institute of Zoology, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100101, China
- These authors contributed equally to the work as first authors
| | - Hongmei Liu
- State Key Laboratory of Membrane Biology, Institute of Zoology, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100101, China
- These authors contributed equally to the work as first authors
| | - Xuefei Zhu
- State Key Laboratory of Membrane Biology, Institute of Zoology, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100101, China
- These authors contributed equally to the work as first authors
| | - Hongyan Shen
- CAS Key Laboratory of Genomics and Precision Medicine, Beijing Institute of Genomics, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Xiaolu Ma
- CAS Key Laboratory of Genomics and Precision Medicine, Beijing Institute of Genomics, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Fengli Wang
- State Key Laboratory of Membrane Biology, Institute of Zoology, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Min Huang
- CAS Key Laboratory of Genomics and Precision Medicine, Beijing Institute of Genomics, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Juanjuan Gong
- State Key Laboratory of Membrane Biology, Institute of Zoology, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Xiaoling Li
- State Key Laboratory of Membrane Biology, Institute of Zoology, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Yun Wang
- State Key Laboratory of Membrane Biology, Institute of Zoology, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Caixia Guo
- CAS Key Laboratory of Genomics and Precision Medicine, Beijing Institute of Genomics, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100101, China
- To whom correspondence should be addressed. Tel: +86 10 64807296; Fax: +86 10 64807313; . Correspondence may also be addressed to Caixia Guo. Tel: +86 10 84097646; Fax: +86 10 84097720;
| | - Tie-Shan Tang
- State Key Laboratory of Membrane Biology, Institute of Zoology, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100101, China
- To whom correspondence should be addressed. Tel: +86 10 64807296; Fax: +86 10 64807313; . Correspondence may also be addressed to Caixia Guo. Tel: +86 10 84097646; Fax: +86 10 84097720;
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41
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Impact of Age and Insulin-Like Growth Factor-1 on DNA Damage Responses in UV-Irradiated Human Skin. Molecules 2017; 22:molecules22030356. [PMID: 28245638 PMCID: PMC5432641 DOI: 10.3390/molecules22030356] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 02/22/2017] [Accepted: 02/24/2017] [Indexed: 01/19/2023] Open
Abstract
The growing incidence of non-melanoma skin cancer (NMSC) necessitates a thorough understanding of its primary risk factors, which include exposure to ultraviolet (UV) wavelengths of sunlight and age. Whereas UV radiation (UVR) has long been known to generate photoproducts in genomic DNA that promote genetic mutations that drive skin carcinogenesis, the mechanism by which age contributes to disease pathogenesis is less understood and has not been sufficiently studied. In this review, we highlight studies that have considered age as a variable in examining DNA damage responses in UV-irradiated skin and then discuss emerging evidence that the reduced production of insulin-like growth factor-1 (IGF-1) by senescent fibroblasts in the dermis of geriatric skin creates an environment that negatively impacts how epidermal keratinocytes respond to UVR-induced DNA damage. In particular, recent data suggest that two principle components of the cellular response to DNA damage, including nucleotide excision repair and DNA damage checkpoint signaling, are both partially defective in keratinocytes with inactive IGF-1 receptors. Overcoming these tumor-promoting conditions in aged skin may therefore provide a way to lower aging-associated skin cancer risk, and thus we will consider how dermal wounding and related clinical interventions may work to rejuvenate the skin, re-activate IGF-1 signaling, and prevent the initiation of NMSC.
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42
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Kemp MG, Spandau DF, Simman R, Travers JB. Insulin-like Growth Factor 1 Receptor Signaling Is Required for Optimal ATR-CHK1 Kinase Signaling in Ultraviolet B (UVB)-irradiated Human Keratinocytes. J Biol Chem 2016; 292:1231-1239. [PMID: 27979966 DOI: 10.1074/jbc.m116.765883] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 12/08/2016] [Indexed: 01/16/2023] Open
Abstract
UVB wavelengths of light induce the formation of photoproducts in DNA that are potentially mutagenic if not properly removed by the nucleotide excision repair machinery. As an additional mechanism to minimize the risk of mutagenesis, UVB-irradiated cells also activate a checkpoint signaling cascade mediated by the ATM and Rad3-related (ATR) and checkpoint kinase 1 (CHK1) kinases to transiently suppress DNA synthesis and cell cycle progression. Given that keratinocytes in geriatric skin display reduced activation of the insulin-like growth factor 1 receptor (IGF-1R) and alterations in DNA repair rate, apoptosis, and senescence following UVB exposure, here we used cultured human keratinocytes in vitro and skin explants ex vivo to examine how IGF-1R activation status affects ATR-CHK1 kinase signaling and the inhibition of DNA replication following UVB irradiation. We find that disruption of IGF-1R signaling with small-molecule inhibitors or IGF-1 withdrawal partially abrogates both the phosphorylation and activation of CHK1 by ATR and the accompanying inhibition of chromosomal DNA synthesis in UVB-irradiated keratinocytes. A critical protein factor that mediates both ATR-CHK1 signaling and nucleotide excision repair is replication protein A, and we find that its accumulation on UVB-damaged chromatin is partially attenuated in cells with an inactive IGF-1R. These results indicate that mutagenesis and skin carcinogenesis in IGF-1-deficient geriatric skin may be caused by defects in multiple cellular responses to UVB-induced DNA damage, including through a failure to properly suppress DNA synthesis on UVB-damaged DNA templates.
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Affiliation(s)
- Michael G Kemp
- From the Department of Pharmacology and Toxicology, Wright State University Boonshoft School of Medicine, Dayton, Ohio 45435,
| | - Dan F Spandau
- the Departments of Dermatology and.,Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, Indiana 46202, and
| | - Richard Simman
- From the Department of Pharmacology and Toxicology, Wright State University Boonshoft School of Medicine, Dayton, Ohio 45435
| | - Jeffrey B Travers
- From the Department of Pharmacology and Toxicology, Wright State University Boonshoft School of Medicine, Dayton, Ohio 45435.,the Dayton Veterans Affairs Medical Center, Dayton, Ohio 45428
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43
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Cellular responses to replication stress: Implications in cancer biology and therapy. DNA Repair (Amst) 2016; 49:9-20. [PMID: 27908669 DOI: 10.1016/j.dnarep.2016.11.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Accepted: 11/15/2016] [Indexed: 12/11/2022]
Abstract
DNA replication is essential for cell proliferation. Any obstacles during replication cause replication stress, which may lead to genomic instability and cancer formation. In this review, we summarize the physiological DNA replication process and the normal cellular response to replication stress. We also outline specialized therapies in clinical trials based on current knowledge and future perspectives in the field.
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44
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Vijai J, Topka S, Villano D, Ravichandran V, Maxwell KN, Maria A, Thomas T, Gaddam P, Lincoln A, Kazzaz S, Wenz B, Carmi S, Schrader KA, Hart SN, Lipkin SM, Neuhausen SL, Walsh MF, Zhang L, Lejbkowicz F, Rennert H, Stadler ZK, Robson M, Weitzel JN, Domchek S, Daly MJ, Couch FJ, Nathanson KL, Norton L, Rennert G, Offit K. A Recurrent ERCC3 Truncating Mutation Confers Moderate Risk for Breast Cancer. Cancer Discov 2016; 6:1267-1275. [PMID: 27655433 DOI: 10.1158/2159-8290.cd-16-0487] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 09/16/2016] [Indexed: 12/11/2022]
Abstract
Known gene mutations account for approximately 50% of the hereditary risk for breast cancer. Moderate and low penetrance variants, discovered by genomic approaches, account for an as-yet-unknown proportion of the remaining heritability. A truncating mutation c.325C>T:p.Arg109* (R109X) in the ATP-dependent helicase ERCC3 was observed recurrently among exomes sequenced in BRCA wild-type, breast cancer-affected individuals of Ashkenazi Jewish ancestry. Modeling of the mutation in ERCC3-deficient or CRISPR/Cas9-edited cell lines showed a consistent pattern of reduced expression of the protein and concomitant hypomorphic functionality when challenged with UVC exposure or treatment with the DNA alkylating agent IlludinS. Overexpressing the mutant protein in ERCC3-deficient cells only partially rescued their DNA repair-deficient phenotype. Comparison of frequency of this recurrent mutation in over 6,500 chromosomes of breast cancer cases and 6,800 Ashkenazi controls showed significant association with breast cancer risk (ORBC = 1.53, ORER+ = 1.73), particularly for the estrogen receptor-positive subset (P < 0.007). SIGNIFICANCE A functionally significant recurrent ERCC3 mutation increased the risk for breast cancer in a genetic isolate. Mutated cell lines showed lower survival after in vitro exposure to DNA-damaging agents. Thus, similar to tumors arising in the background of homologous repair defects, mutations in nucleotide excision repair genes such as ERCC3 could constitute potential therapeutic targets in a subset of hereditary breast cancers. Cancer Discov; 6(11); 1267-75. ©2016 AACR.This article is highlighted in the In This Issue feature, p. 1197.
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Affiliation(s)
- Joseph Vijai
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.,Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Sabine Topka
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.,Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Danylo Villano
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.,Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Vignesh Ravichandran
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.,Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Kara N Maxwell
- Division of Hematology/Oncology, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Ann Maria
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.,Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Tinu Thomas
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.,Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Pragna Gaddam
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.,Clinical Genetics Service, Department of Medicine, Memorial Sloan Kettering, New York, New York
| | - Anne Lincoln
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.,Clinical Genetics Service, Department of Medicine, Memorial Sloan Kettering, New York, New York
| | - Sarah Kazzaz
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.,Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Brandon Wenz
- Division of Hematology/Oncology, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Shai Carmi
- Braun School of Public Health and Community Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Kasmintan A Schrader
- British Columbia Cancer Agency, Canada's Michael Smith Genome Sciences Centre, Vancouver, Canada
| | - Steven N Hart
- Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Steve M Lipkin
- Department of Medicine, Weill Cornell Medical College, New York, New York
| | - Susan L Neuhausen
- Department of Population Sciences, Beckman Research Institute of City of Hope, Duarte, California
| | - Michael F Walsh
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.,Clinical Genetics Service, Department of Medicine, Memorial Sloan Kettering, New York, New York.,Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Liying Zhang
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Flavio Lejbkowicz
- Clalit National Israeli Cancer Control Center and Department of Community Medicine and Epidemiology, Carmel Medical Center and B Rappaport Faculty of Medicine, Haifa, Israel
| | - Hedy Rennert
- Clalit National Israeli Cancer Control Center and Department of Community Medicine and Epidemiology, Carmel Medical Center and B Rappaport Faculty of Medicine, Haifa, Israel
| | - Zsofia K Stadler
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.,Clinical Genetics Service, Department of Medicine, Memorial Sloan Kettering, New York, New York.,Department of Medicine, Weill Cornell Medical College, New York, New York
| | - Mark Robson
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.,Clinical Genetics Service, Department of Medicine, Memorial Sloan Kettering, New York, New York.,Department of Medicine, Weill Cornell Medical College, New York, New York
| | - Jeffrey N Weitzel
- Clinical Cancer Genetics (for the City of Hope Clinical Cancer Genetics Community Research Network), City of Hope, Duarte, California
| | - Susan Domchek
- Division of Hematology/Oncology, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania.,Division of Translational Medicine and Human Genetics, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania.,Abramson Cancer Center, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Mark J Daly
- Broad Institute of Harvard and Massachusetts Institute of Technology, Cambridge, Massachusetts.,Center for Human Genetic Research and Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts
| | - Fergus J Couch
- Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota.,Department of Laboratory Medicine and Pathology, and Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Katherine L Nathanson
- Division of Hematology/Oncology, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania.,Division of Translational Medicine and Human Genetics, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania.,Abramson Cancer Center, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Larry Norton
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Gad Rennert
- Clalit National Israeli Cancer Control Center and Department of Community Medicine and Epidemiology, Carmel Medical Center and B Rappaport Faculty of Medicine, Haifa, Israel
| | - Kenneth Offit
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York. .,Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, New York.,Clinical Genetics Service, Department of Medicine, Memorial Sloan Kettering, New York, New York.,Department of Medicine, Weill Cornell Medical College, New York, New York
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45
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Sarmento LM, Barata JT. CHK1 and replicative stress in T-cell leukemia: Can an irreverent tumor suppressor end up playing the oncogene? Adv Biol Regul 2016; 60:115-121. [PMID: 26527132 DOI: 10.1016/j.jbior.2015.10.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 10/19/2015] [Accepted: 10/20/2015] [Indexed: 06/05/2023]
Abstract
Replicative stress (RS) is a cell-intrinsic phenomenon enhanced by oncogenic transformation. Checkpoint kinase 1 (CHK1) is a key component of the ATR-dependent DNA damage response pathway that protects cells from RS by preventing replication fork collapse and activating homologous DNA repair. Taking this knowledge into account, one would predict CHK1 behaves strictly as a tumor suppressor. However, the reality seems far more complex. CHEK1 loss-of-function mutations have not been found in human tumors, and transgenic expression of Chek1 in mice promotes oncogene-induced transformation through RS inhibition. Moreover, CHK1 is overexpressed in various human cancers and CHK1 inhibitors have been developed as sensitizers to enhance the cytotoxicity of DNA damage-inducing chemotherapies. Here, we summarize the literature on the involvement of CHK1 in cancer progression, including our recent observation that CHK1 sustains T-cell acute lymphoblastic leukemia (T-ALL) cell viability. We also debate the importance of identifying patients that could benefit the most from treatment with CHK1 inhibitors, taking T-ALL as a model, and propose possible markers of therapeutic response.
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Affiliation(s)
- Leonor M Sarmento
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Av. Prof. Egas Moniz, 1649-028 Lisboa, Portugal
| | - João T Barata
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Av. Prof. Egas Moniz, 1649-028 Lisboa, Portugal.
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46
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Abstract
There is an extensive and growing body of evidence that DNA replication stress is a major driver in the development and progression of many cancers, and that these cancers rely heavily on replication stress response pathways for their continued proliferation. This raises the possibility that the pathways that ordinarily protect cells from the accumulation of cancer-causing mutations may actually prove to be effective therapeutic targets for a wide range of malignancies. In this review, we explore the mechanisms by which sustained proliferation can lead to replication stress and genome instability, and discuss how the pattern of mutations observed in human cancers is supportive of this oncogene-induced replication stress model. Finally, we go on to consider the implications of replication stress both as a prognostic indicator and, more encouragingly, as a potential target in cancer treatment.
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Affiliation(s)
- Elaine M Taylor
- Lancaster Medical School, Faculty of Health & Medicine, Lancaster University, Lancaster, LA1 4YG, UK
| | - Howard D Lindsay
- Lancaster Medical School, Faculty of Health & Medicine, Lancaster University, Lancaster, LA1 4YG, UK
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47
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Cordeiro-Stone M, McNulty JJ, Sproul CD, Chastain PD, Gibbs-Flournoy E, Zhou Y, Carson C, Rao S, Mitchell DL, Simpson DA, Thomas NE, Ibrahim JG, Kaufmann WK. Effective intra-S checkpoint responses to UVC in primary human melanocytes and melanoma cell lines. Pigment Cell Melanoma Res 2015; 29:68-80. [PMID: 26437005 DOI: 10.1111/pcmr.12426] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 09/25/2015] [Indexed: 11/29/2022]
Abstract
The objective of this study was to assess potential functional attenuation or inactivation of the intra-S checkpoint during melanoma development. Proliferating cultures of skin melanocytes, fibroblasts, and melanoma cell lines were exposed to increasing fluences of UVC and intra-S checkpoint responses were quantified. Melanocytes displayed stereotypic intra-S checkpoint responses to UVC qualitatively and quantitatively equivalent to those previously demonstrated in skin fibroblasts. In comparison with fibroblasts, primary melanocytes displayed reduced UVC-induced inhibition of DNA strand growth and enhanced degradation of p21Waf1 after UVC, suggestive of enhanced bypass of UVC-induced DNA photoproducts. All nine melanoma cell lines examined, including those with activating mutations in BRAF or NRAS oncogenes, also displayed proficiency in activation of the intra-S checkpoint in response to UVC irradiation. The results indicate that bypass of oncogene-induced senescence during melanoma development was not associated with inactivation of the intra-S checkpoint response to UVC-induced DNA replication stress.
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Affiliation(s)
- Marila Cordeiro-Stone
- Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, NC, USA.,Curriculum in Toxicology, University of North Carolina, Chapel Hill, NC, USA.,Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA.,Center for Environmental Health and Susceptibility, University of North Carolina, Chapel Hill, NC, USA
| | - John J McNulty
- Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, NC, USA
| | | | - Paul D Chastain
- Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - Eugene Gibbs-Flournoy
- Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - Yingchun Zhou
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
| | - Craig Carson
- Department of Dermatology, University of North Carolina, Chapel Hill, NC, USA
| | - Shangbang Rao
- Department of Biostatistics, University of North Carolina, Chapel Hill, NC, USA
| | - David L Mitchell
- Science Park - Research Division, The University of Texas MD Anderson Cancer Center, Smithville, TX, USA
| | - Dennis A Simpson
- Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - Nancy E Thomas
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA.,Center for Environmental Health and Susceptibility, University of North Carolina, Chapel Hill, NC, USA.,Department of Dermatology, University of North Carolina, Chapel Hill, NC, USA
| | - Joseph G Ibrahim
- Department of Biostatistics, University of North Carolina, Chapel Hill, NC, USA
| | - William K Kaufmann
- Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, NC, USA.,Curriculum in Toxicology, University of North Carolina, Chapel Hill, NC, USA.,Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA.,Center for Environmental Health and Susceptibility, University of North Carolina, Chapel Hill, NC, USA
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48
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Manic G, Obrist F, Sistigu A, Vitale I. Trial Watch: Targeting ATM-CHK2 and ATR-CHK1 pathways for anticancer therapy. Mol Cell Oncol 2015; 2:e1012976. [PMID: 27308506 PMCID: PMC4905354 DOI: 10.1080/23723556.2015.1012976] [Citation(s) in RCA: 108] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 01/25/2015] [Accepted: 01/26/2015] [Indexed: 02/08/2023]
Abstract
The ataxia telangiectasia mutated serine/threonine kinase (ATM)/checkpoint kinase 2 (CHEK2, best known as CHK2) and the ATM and Rad3-related serine/threonine kinase (ATR)/CHEK1 (best known as CHK1) cascades are the 2 major signaling pathways driving the DNA damage response (DDR), a network of processes crucial for the preservation of genomic stability that act as a barrier against tumorigenesis and tumor progression. Mutations and/or deletions of ATM and/or CHK2 are frequently found in tumors and predispose to cancer development. In contrast, the ATR-CHK1 pathway is often upregulated in neoplasms and is believed to promote tumor growth, although some evidence indicates that ATR and CHK1 may also behave as haploinsufficient oncosuppressors, at least in a specific genetic background. Inactivation of the ATM-CHK2 and ATR-CHK1 pathways efficiently sensitizes malignant cells to radiotherapy and chemotherapy. Moreover, ATR and CHK1 inhibitors selectively kill tumor cells that present high levels of replication stress, have a deficiency in p53 (or other DDR players), or upregulate the ATR-CHK1 module. Despite promising preclinical results, the clinical activity of ATM, ATR, CHK1, and CHK2 inhibitors, alone or in combination with other therapeutics, has not yet been fully demonstrated. In this Trial Watch, we give an overview of the roles of the ATM-CHK2 and ATR-CHK1 pathways in cancer initiation and progression, and summarize the results of clinical studies aimed at assessing the safety and therapeutic profile of regimens based on inhibitors of ATR and CHK1, the only 2 classes of compounds that have so far entered clinics.
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Affiliation(s)
| | - Florine Obrist
- Université Paris-Sud/Paris XI; Le Kremlin-Bicêtre, France
- INSERM, UMRS1138; Paris, France
- Equipe 11 labelisée par la Ligue Nationale contre le Cancer; Centre de Recherche des Cordeliers; Paris, France
- Gustave Roussy Cancer Campus; Villejuif, France
| | | | - Ilio Vitale
- Regina Elena National Cancer Institute; Rome, Italy
- Department of Biology, University of Rome “TorVergata”; Rome, Italy
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49
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Abstract
Chromothripsis is a recently recognized mode of genetic instability that generates chromosomes with strikingly large numbers of segmental re-arrangements. While the characterization of these derivative chromosomes has provided new insights into the processes by which cancer genomes can evolve, the underlying signaling events and molecular mechanisms remain unknown. In medulloblastomas, chromothripsis has been observed to occur in the context of mutational inactivation of p53 and activation of the canonical Hedgehog (Hh) pathway. Recent studies have illuminated mechanistic links between these 2 signaling pathways, including a novel PTCH1 homolog that is regulated by p53. Here, we integrate this new pathway into a hypothetical model for the catastrophic DNA breakage that appears to trigger profound chromosomal rearrangements.
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Affiliation(s)
- Robert Ivkov
- a Department of Radiation Oncology and Molecular Radiation Sciences ; The Kimmel Cancer Center at Johns Hopkins ; Baltimore MD USA
| | - Fred Bunz
- a Department of Radiation Oncology and Molecular Radiation Sciences ; The Kimmel Cancer Center at Johns Hopkins ; Baltimore MD USA
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50
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Platel M, Goldar A, Wiggins JM, Barbosa P, Libeau P, Priam P, Narassimprakash H, Grodzenski X, Marheineke K. Tight Chk1 Levels Control Replication Cluster Activation in Xenopus. PLoS One 2015; 10:e0129090. [PMID: 26046346 PMCID: PMC4457610 DOI: 10.1371/journal.pone.0129090] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Accepted: 05/05/2015] [Indexed: 12/03/2022] Open
Abstract
DNA replication in higher eukaryotes initiates at thousands of origins according to a spatio-temporal program. The ATR/Chk1 dependent replication checkpoint inhibits the activation of later firing origins. In the Xenopus in vitro system initiations are not sequence dependent and 2-5 origins are grouped in clusters that fire at different times despite a very short S phase. We have shown that the temporal program is stochastic at the level of single origins and replication clusters. It is unclear how the replication checkpoint inhibits late origins but permits origin activation in early clusters. Here, we analyze the role of Chk1 in the replication program in sperm nuclei replicating in Xenopus egg extracts by a combination of experimental and modelling approaches. After Chk1 inhibition or immunodepletion, we observed an increase of the replication extent and fork density in the presence or absence of external stress. However, overexpression of Chk1 in the absence of external replication stress inhibited DNA replication by decreasing fork densities due to lower Cdk2 kinase activity. Thus, Chk1 levels need to be tightly controlled in order to properly regulate the replication program even during normal S phase. DNA combing experiments showed that Chk1 inhibits origins outside, but not inside, already active clusters. Numerical simulations of initiation frequencies in the absence and presence of Chk1 activity are consistent with a global inhibition of origins by Chk1 at the level of clusters but need to be combined with a local repression of Chk1 action close to activated origins to fit our data.
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Affiliation(s)
- Marie Platel
- Department of Genome Biology, Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Paris South University, Gif sur Yvette, France
| | - Arach Goldar
- Department of Genome Biology, Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Paris South University, Gif sur Yvette, France
| | - Jennifer M. Wiggins
- Department of Genome Biology, Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Paris South University, Gif sur Yvette, France
| | - Pedro Barbosa
- Department of Genome Biology, Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Paris South University, Gif sur Yvette, France
| | - Pierre Libeau
- Department of Genome Biology, Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Paris South University, Gif sur Yvette, France
| | - Pierre Priam
- Department of Genome Biology, Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Paris South University, Gif sur Yvette, France
| | - Hemalatha Narassimprakash
- Department of Genome Biology, Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Paris South University, Gif sur Yvette, France
| | - Xenia Grodzenski
- Department of Genome Biology, Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Paris South University, Gif sur Yvette, France
| | - Kathrin Marheineke
- Department of Genome Biology, Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Paris South University, Gif sur Yvette, France
- * E-mail:
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