1
|
R Brannock K, Kahwash SB. A Rare Case of Early T-Precursor Lymphoblastic Lymphoma (ETP-LBL) in a Child With Nijmegen Breakage Syndrome. Pediatr Dev Pathol 2024:10935266241255277. [PMID: 38794943 DOI: 10.1177/10935266241255277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/26/2024]
Abstract
Lymphoblastic lymphoma (LBL) with an early T-cell precursor phenotype has only been rarely reported. Nijmegen breakage syndrome (NBS) is an inherited chromosomal instability disorder with known predisposition to malignancies that is very rare as well. We report a case of early T-precursor LBL (ETP-LBL) in a patient with NBS, a rare combination that has not been reported. We raise the question of whether a chromosomal instability disorder such as NBS increases the propensity for early T-precursor acute lymphoblastic leukemia/lymphoma (ETP-ALL/LBL), given that ETP-ALL has been shown to have increased genomic instability compared to T-ALL.
Collapse
Affiliation(s)
- Kristina R Brannock
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital, Columbus, OH, USA
- Department of Pathology, The Ohio State University, Columbus, OH, USA
| | - Samir B Kahwash
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital, Columbus, OH, USA
- Department of Pathology, The Ohio State University, Columbus, OH, USA
| |
Collapse
|
2
|
Binet R, Lambert JP, Tomkova M, Tischfield S, Baggiolini A, Picaud S, Sarkar S, Louphrasitthiphol P, Dias D, Carreira S, Humphrey TC, Fillipakopoulos P, White R, Goding CR. DNA damage remodels the MITF interactome to increase melanoma genomic instability. Genes Dev 2024; 38:70-94. [PMID: 38316520 PMCID: PMC10903946 DOI: 10.1101/gad.350740.123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 01/08/2024] [Indexed: 02/07/2024]
Abstract
Since genome instability can drive cancer initiation and progression, cells have evolved highly effective and ubiquitous DNA damage response (DDR) programs. However, some cells (for example, in skin) are normally exposed to high levels of DNA-damaging agents. Whether such high-risk cells possess lineage-specific mechanisms that tailor DNA repair to the tissue remains largely unknown. Using melanoma as a model, we show here that the microphthalmia-associated transcription factor MITF, a lineage addition oncogene that coordinates many aspects of melanocyte and melanoma biology, plays a nontranscriptional role in shaping the DDR. On exposure to DNA-damaging agents, MITF is phosphorylated at S325, and its interactome is dramatically remodeled; most transcription cofactors dissociate, and instead MITF interacts with the MRE11-RAD50-NBS1 (MRN) complex. Consequently, cells with high MITF levels accumulate stalled replication forks and display defects in homologous recombination-mediated repair associated with impaired MRN recruitment to DNA damage. In agreement with this, high MITF levels are associated with increased single-nucleotide and copy number variant burdens in melanoma. Significantly, the SUMOylation-defective MITF-E318K melanoma predisposition mutation recapitulates the effects of DNA-PKcs-phosphorylated MITF. Our data suggest that a nontranscriptional function of a lineage-restricted transcription factor contributes to a tissue-specialized modulation of the DDR that can impact cancer initiation.
Collapse
Affiliation(s)
- Romuald Binet
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford OX3 7DQ, United Kingdom
| | - Jean-Philippe Lambert
- Department of Molecular Medicine, Cancer Research Center, Université Laval, Québec City, Québec G1V 4G2, Canada
- Endocrinology-Nephrology Axis, CHU de Québec-Université Laval Research Center, Québec City, Québec G1V 4G2, Canada
| | - Marketa Tomkova
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford OX3 7DQ, United Kingdom
- Department of Biochemistry and Molecular Medicine, University of California, Davis, Davis, California 95616, USA
| | - Samuel Tischfield
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
- Marie-Josée and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
| | - Arianna Baggiolini
- Center for Stem Cell Biology and Developmental Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
| | - Sarah Picaud
- Structural Genomics Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX3 7DQ, United Kingdom
| | - Sovan Sarkar
- Cancer Research UK, Medical Research Council Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford OX3 7DQ, United Kingdom
| | - Pakavarin Louphrasitthiphol
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford OX3 7DQ, United Kingdom
| | - Diogo Dias
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford OX3 7DQ, United Kingdom
| | - Suzanne Carreira
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford OX3 7DQ, United Kingdom
| | - Timothy C Humphrey
- Cancer Research UK, Medical Research Council Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford OX3 7DQ, United Kingdom
| | - Panagis Fillipakopoulos
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford OX3 7DQ, United Kingdom
- Structural Genomics Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX3 7DQ, United Kingdom
| | - Richard White
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford OX3 7DQ, United Kingdom
- Department of Cancer Biology and Genetics, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
| | - Colin R Goding
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford OX3 7DQ, United Kingdom;
| |
Collapse
|
3
|
Zhong A, Cheng CS, Lu RQ, Guo L. Suppression of NBS1 Upregulates CyclinB to Induce Olaparib Sensitivity in Ovarian Cancer. Technol Cancer Res Treat 2024; 23:15330338231212085. [PMID: 38192153 PMCID: PMC10777771 DOI: 10.1177/15330338231212085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Revised: 09/17/2023] [Accepted: 10/18/2023] [Indexed: 01/10/2024] Open
Abstract
Background: Deficiencies in DNA damage repair responses promote chemotherapy sensitivity of tumor cells. The Nibrin homolog encoding gene Nijmegen Breakage Syndrome 1 (NBS1) is a crucial component of the MRE11-RAD50-NBN complex (MRN complex) and is involved in the response to DNA double-strand breaks (DSBs) repair that has emerged as an attractive strategy to overcome tumor drug resistance, but the functional relationship between NBS1 regulated DNA damage repair and cell cycle checkpoints has not been fully elucidated. Methods: In this study, lentivirus-mediated RNAi was used to construct NBS1-downregulated cells. Flow cytometry, qPCR, and immunohistochemistry were used to explore the regulatory relationship between NBS1 and CyclinB in vivo and in vitro. Results: Our findings suggest that NBS1 deficiency leads to defective homologous recombination repair. Inhibition of NBS1 expression activates CHK1 and CyclinB signaling pathways leading to cell cycle arrest and sensitizes ovarian cancer cells to Olaparib treatment in vitro and in vivo. NBS1-deficient ovarian cancer cells tend to maintain sensitivity to chemotherapeutic drugs through activation of cell cycle checkpoints. Conclusions: NBS1 may be a potential therapeutic target for epithelial ovarian cancer as it plays a role in the regulation of the DNA damage response and cell cycle checkpoints. Suppression of NBS1 upregulates CyclinB to induce Olaparib sensitivity in ovarian cancer.
Collapse
Affiliation(s)
- Ailing Zhong
- Department of Clinical Laboratory, Fudan University, Shanghai Cancer Center, Shanghai, China
| | - Chien-shan Cheng
- Department of Integrative Oncology, Fudan University, Shanghai Cancer Center, Shanghai, China
| | - Ren quan Lu
- Department of Clinical Laboratory, Fudan University, Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Lin Guo
- Department of Clinical Laboratory, Fudan University, Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| |
Collapse
|
4
|
Bi X, Zhang M, Zhou J, Yan X, Cheng L, Luo L, Huang C, Yin Z. Phosphorylated Hsp27 promotes adriamycin resistance in breast cancer cells through regulating dual phosphorylation of c-Myc. Cell Signal 2023; 112:110913. [PMID: 37797796 DOI: 10.1016/j.cellsig.2023.110913] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 09/02/2023] [Accepted: 10/02/2023] [Indexed: 10/07/2023]
Abstract
Chemotherapy resistance of breast cancer cells is one of the major factors affecting patient survival rate. Heat shock protein 27 (Hsp27) is a member of the small heat shock protein family that has been reported to be associated with chemotherapy resistance in tumor cells, but the exact mechanism is not fully understood. Here, we explored the regulation of Hsp27 in adriamycin-resistant pathological conditions of breast cancer in vitro and in vivo. We found that overexpression of Hsp27 in MCF-7 breast cancer cells reversed DNA damage induced by adriamycin, and thereby reduced subsequent cell apoptosis. Non-phosphorylated Hsp27 accelerated ubiquitin-mediated degradation of c-Myc under normal physiological conditions. After stimulation with adriamycin, Hsp27 was phosphorylated and translocated from the cytoplasm into the nucleus, where phosphorylated Hsp27 upregulated c-Myc and Nijmegen breakage syndrome 1 (NBS1) protein levels thus leading to ATM activation. We further showed that phosphorylated Hsp27 promoted c-Myc nuclear import and stabilization by regulating T58/S62 phosphorylation of c-Myc through a protein phosphatase 2A (PP2A)-dependent mechanism. Collectively, the data presented in this study demonstrate that Hsp27, in its phosphorylation state, plays a critical role in adriamycin-resistant pathological conditions of breast cancer cells.
Collapse
Affiliation(s)
- Xiaowen Bi
- School of Basic Medical Sciences, Nanchang University, Nanchang 330006, China; Jiangsu Province Key Laboratory for Molecular and Medical Biotechnology, College of Life Science, Nanjing Normal University, Nanjing, China
| | - Miao Zhang
- Institute of Microbiology, Jiangxi Academy of Sciences, Nanchang 330096, China
| | - Jinyi Zhou
- Jiangsu Province Key Laboratory for Molecular and Medical Biotechnology, College of Life Science, Nanjing Normal University, Nanjing, China
| | - Xintong Yan
- Jiangsu Province Key Laboratory for Molecular and Medical Biotechnology, College of Life Science, Nanjing Normal University, Nanjing, China
| | - Lixia Cheng
- School of Basic Medical Sciences, Nanchang University, Nanchang 330006, China
| | - Lan Luo
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, China.
| | - Chunhong Huang
- School of Basic Medical Sciences, Nanchang University, Nanchang 330006, China.
| | - Zhimin Yin
- Jiangsu Province Key Laboratory for Molecular and Medical Biotechnology, College of Life Science, Nanjing Normal University, Nanjing, China.
| |
Collapse
|
5
|
Torres-Montaner A. Interactions between the DNA Damage Response and the Telomere Complex in Carcinogenesis: A Hypothesis. Curr Issues Mol Biol 2023; 45:7582-7616. [PMID: 37754262 PMCID: PMC10527771 DOI: 10.3390/cimb45090478] [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: 08/02/2023] [Revised: 09/12/2023] [Accepted: 09/14/2023] [Indexed: 09/28/2023] Open
Abstract
Contrary to what was once thought, direct cancer originating from normal stem cells seems to be extremely rare. This is consistent with a preneoplastic period of telomere length reduction/damage in committed cells that becomes stabilized in transformation. Multiple observations suggest that telomere damage is an obligatory step preceding its stabilization. During tissue turnover, the telomeres of cells undergoing differentiation can be damaged as a consequence of defective DNA repair caused by endogenous or exogenous agents. This may result in the emergence of new mechanism of telomere maintenance which is the final outcome of DNA damage and the initial signal that triggers malignant transformation. Instead, transformation of stem cells is directly induced by primary derangement of telomere maintenance mechanisms. The newly modified telomere complex may promote survival of cancer stem cells, independently of telomere maintenance. An inherent resistance of stem cells to transformation may be linked to specific, robust mechanisms that help maintain telomere integrity.
Collapse
Affiliation(s)
- Antonio Torres-Montaner
- Department of Pathology, Queen’s Hospital, Rom Valley Way, Romford, London RM7 OAG, UK;
- Departamento de Bioquímica y Biologia Molecular, Universidad de Cadiz, Puerto Real, 11510 Cadiz, Spain
| |
Collapse
|
6
|
Binet R, Lambert JP, Tomkova M, Tischfield S, Baggiolini A, Picaud S, Sarkar S, Louphrasitthiphol P, Dias D, Carreira S, Humphrey T, Fillipakopoulos P, White R, Goding CR. DNA damage-induced interaction between a lineage addiction oncogenic transcription factor and the MRN complex shapes a tissue-specific DNA Damage Response and cancer predisposition. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.04.21.537819. [PMID: 37131595 PMCID: PMC10153263 DOI: 10.1101/2023.04.21.537819] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Since genome instability can drive cancer initiation and progression, cells have evolved highly effective and ubiquitous DNA Damage Response (DDR) programs. However, some cells, in skin for example, are normally exposed to high levels of DNA damaging agents. Whether such high-risk cells possess lineage-specific mechanisms that tailor DNA repair to the tissue remains largely unknown. Here we show, using melanoma as a model, that the microphthalmia-associated transcription factor MITF, a lineage addition oncogene that coordinates many aspects of melanocyte and melanoma biology, plays a non-transcriptional role in shaping the DDR. On exposure to DNA damaging agents, MITF is phosphorylated by ATM/DNA-PKcs, and unexpectedly its interactome is dramatically remodelled; most transcription (co)factors dissociate, and instead MITF interacts with the MRE11-RAD50-NBS1 (MRN) complex. Consequently, cells with high MITF levels accumulate stalled replication forks, and display defects in homologous recombination-mediated repair associated with impaired MRN recruitment to DNA damage. In agreement, high MITF levels are associated with increased SNV burden in melanoma. Significantly, the SUMOylation-defective MITF-E318K melanoma predisposition mutation recapitulates the effects of ATM/DNA-PKcs-phosphorylated MITF. Our data suggest that a non-transcriptional function of a lineage-restricted transcription factor contributes to a tissue-specialised modulation of the DDR that can impact cancer initiation.
Collapse
Affiliation(s)
- Romuald Binet
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford, OX3 7DQ, UK
| | - Jean-Philippe Lambert
- Department of Molecular Medicine, Cancer Research Center and Big Data Research Center, Université Laval, Quebec, Canada; Endocrinology – Nephrology Axis, CHU de Québec – Université Laval Research Center, Quebec City, QC, Canada, G1V 4G2
| | - Marketa Tomkova
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford, OX3 7DQ, UK
- Department of Biochemistry and Molecular Medicine, University of California, Davis, USA
| | - Samuel Tischfield
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
- Marie-Josée and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Arianna Baggiolini
- Center for Stem Cell Biology and Developmental Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Sarah Picaud
- Structural Genomics Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX3 7DQ, UK
| | - Sovan Sarkar
- CRUK MRC Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK
| | - Pakavarin Louphrasitthiphol
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford, OX3 7DQ, UK
| | - Diogo Dias
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford, OX3 7DQ, UK
| | - Suzanne Carreira
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford, OX3 7DQ, UK
| | - Timothy Humphrey
- CRUK MRC Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK
| | - Panagis Fillipakopoulos
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford, OX3 7DQ, UK
- Structural Genomics Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX3 7DQ, UK
| | - Richard White
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford, OX3 7DQ, UK
- Department of Cancer Biology and Genetics, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Colin R Goding
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford, OX3 7DQ, UK
| |
Collapse
|
7
|
Nigam K, Gupta S, Singh N, Yadav SK, Sanyal S. XRCC3 and NBS1 gene polymorphisms modulate the risk of pre-oral cancer and oral cancer in the North Indian population. J Cancer Res Ther 2023; 19:304-311. [PMID: 37006067 DOI: 10.4103/jcrt.jcrt_2239_21] [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] [Indexed: 04/04/2023]
Abstract
BACKGROUND Oral cancer is alarming disease in the developing countries like India. DNA repair capacity may affect by genetic polymorphisms in DNA repair genes and thus may cause to cancer. XRCC3 involves in homologous recombination repair pathway and repair DNA damage and crosslinks while, NBS1 participate in repair of double strand DNA break and starts the cell-cycle checkpoint signaling. AIMS AND OBJECTIVES This study was to conducted to find the association of XRCC3, NBS1 polymorphisms with oral disease. RESULTS TT genotype of XRCC3 was associated with high risk of precancerous lesions and oral cancerous lesions (P value=0.0001, OR=9.68, 95% CI=2.82-33.21; and P value=0.0001, OR=13.10, 95% CI=3.38-50.73 respectively). We did not observe any interactions of XRCC3 polymorphism with demographic parameters in influencing the risk of oral diseases. Variant allele genotypes (CG, GG) of NBS1 (C>G) polymorphism showed protective association with Oral submucous fibrosis (OSMF), lichen planus as well as oral cancer (OR=0.31, OR=0.01; OR=0.39, OR=0.03; OR=0.43, OR=0.31 respectively). Particularly, tobacco chewer with CG & GG genotypes were at decrease risk of oral diseases (P value=0.02, OR=0.32, 95% CI=0.12-0.80). Compared to CC/CC combined genotype CG/CC, CG/CT, GG/CC and CG/CT genotypes decreased the risk of oral disease (OR=0.05, 0.47, 0.26 & 0.14 respectively). CONCLUSION This study concludes that SNP in XRCC3, NBS1 affects susceptibility to oral disease.
Collapse
Affiliation(s)
- Kumud Nigam
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow, Uttar Pradesh, India
| | - Shalini Gupta
- Department of Oral Pathology and Microbiology, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Navin Singh
- Department of Radiotherapy, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Suresh Kumar Yadav
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow, Uttar Pradesh, India
| | - Somali Sanyal
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow, Uttar Pradesh, India
| |
Collapse
|
8
|
Chisada S, Ohtsuka K, Fujiwara M, Yoshida M, Matsushima S, Watanabe T, Karita K, Ohnishi H. A rad50 germline mutation induces tumorigenesis and ataxia-telangiectasia phenotype in a transparent medaka model. PLoS One 2023; 18:e0282277. [PMID: 37098078 PMCID: PMC10129005 DOI: 10.1371/journal.pone.0282277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 02/11/2023] [Indexed: 04/26/2023] Open
Abstract
The MRE11A-RAD50-NBS1 complex activates the ataxia-telangiectasia mutated (ATM) pathway and plays a central role in genome homeostasis. The association of RAD50 mutations with disease remains unclear; hence, we adopted a medaka rad50 mutant to demonstrate the significance of RAD50 mutation in pathogenesis using the medaka as an experimental animal. A 2-base pair deletion in the rad50 gene was introduced into transparent STIII medaka using the CRISPR/Cas9 system. The mutant was analyzed histologically for tumorigenicity and hindbrain quality, as well as for swimming behavior, to compare with existing ATM-, MRE11A-, and NBS1-mutation-related pathology. Our results revealed that the medaka rad50 mutation concurrently reproduced tumorigenesis (8 out of 10 rad50Δ2/+ medaka), had a decrease in median survival time (65.7 ± 1.1 weeks in control vs. 54.2 ± 2.6 weeks in rad50Δ2/+ medaka, p = 0.001, Welch's t-test), exhibited semi-lethality in rad50Δ2/Δ2 medaka and most of the major ataxia-telangiectasia phenotypes, including ataxia (rheotaxis ability was lower in rad50Δ2/+ medaka than in the control, Mann-Whitney U test, p < 0.05), and telangiectasia (6 out of 10 rad50Δ2/+ medaka). The fish model may aid in further understanding the tumorigenesis and phenotype of ataxia-telangiectasia-related RAD50 germline mutations and in developing novel therapeutic strategies against RAD50 molecular disorders.
Collapse
Affiliation(s)
- Shinichi Chisada
- Department of Hygiene and Public Health, Kyorin University School of Medicine, Mitaka, Tokyo, Japan
| | - Kouki Ohtsuka
- Department of Laboratory Medicine, Kyorin University School of Medicine, Mitaka, Tokyo, Japan
| | - Masachika Fujiwara
- Department of Pathology, Kyorin University School of Medicine, Mitaka, Tokyo, Japan
| | - Masao Yoshida
- Department of Hygiene and Public Health, Kyorin University School of Medicine, Mitaka, Tokyo, Japan
| | - Satsuki Matsushima
- Department of Laboratory Medicine, Kyorin University School of Medicine, Mitaka, Tokyo, Japan
| | - Takashi Watanabe
- Department of Laboratory Medicine, Kyorin University School of Medicine, Mitaka, Tokyo, Japan
| | - Kanae Karita
- Department of Hygiene and Public Health, Kyorin University School of Medicine, Mitaka, Tokyo, Japan
| | - Hiroaki Ohnishi
- Department of Laboratory Medicine, Kyorin University School of Medicine, Mitaka, Tokyo, Japan
| |
Collapse
|
9
|
Kloeber JA, Lou Z. Critical DNA damaging pathways in tumorigenesis. Semin Cancer Biol 2022; 85:164-184. [PMID: 33905873 PMCID: PMC8542061 DOI: 10.1016/j.semcancer.2021.04.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 04/13/2021] [Accepted: 04/15/2021] [Indexed: 12/22/2022]
Abstract
The acquisition of DNA damage is an early driving event in tumorigenesis. Premalignant lesions show activated DNA damage responses and inactivation of DNA damage checkpoints promotes malignant transformation. However, DNA damage is also a targetable vulnerability in cancer cells. This requires a detailed understanding of the cellular and molecular mechanisms governing DNA integrity. Here, we review current work on DNA damage in tumorigenesis. We discuss DNA double strand break repair, how repair pathways contribute to tumorigenesis, and how double strand breaks are linked to the tumor microenvironment. Next, we discuss the role of oncogenes in promoting DNA damage through replication stress. Finally, we discuss our current understanding on DNA damage in micronuclei and discuss therapies targeting these DNA damage pathways.
Collapse
Affiliation(s)
- Jake A Kloeber
- Department of Oncology, Mayo Clinic, Rochester, MN, 55905, USA; Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, MN, 55905, USA; Mayo Clinic Medical Scientist Training Program, Mayo Clinic, Rochester, MN, 55905, USA
| | - Zhenkun Lou
- Department of Oncology, Mayo Clinic, Rochester, MN, 55905, USA.
| |
Collapse
|
10
|
Abdisalaam S, Mukherjee S, Bhattacharya S, Kumari S, Sinha D, Ortega J, Li GM, Sadek H, Krishnan S, Asaithamby A. NBS1-CtIP-mediated DNA end resection suppresses cGAS binding to micronuclei. Nucleic Acids Res 2022; 50:2681-2699. [PMID: 35189637 PMCID: PMC8934670 DOI: 10.1093/nar/gkac079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 01/12/2022] [Accepted: 01/25/2022] [Indexed: 01/07/2023] Open
Abstract
Cyclic guanosine monophosphate-adenosine monophosphate synthase (cGAS) is activated in cells with defective DNA damage repair and signaling (DDR) factors, but a direct role for DDR factors in regulating cGAS activation in response to micronuclear DNA is still poorly understood. Here, we provide novel evidence that Nijmegen breakage syndrome 1 (NBS1) protein, a well-studied DNA double-strand break (DSB) sensor-in coordination with Ataxia Telangiectasia Mutated (ATM), a protein kinase, and Carboxy-terminal binding protein 1 interacting protein (CtIP), a DNA end resection factor-functions as an upstream regulator that prevents cGAS from binding micronuclear DNA. When NBS1 binds to micronuclear DNA via its fork-head-associated domain, it recruits CtIP and ATM via its N- and C-terminal domains, respectively. Subsequently, ATM stabilizes NBS1's interaction with micronuclear DNA, and CtIP converts DSB ends into single-strand DNA ends; these two key events prevent cGAS from binding micronuclear DNA. Additionally, by using a cGAS tripartite system, we show that cells lacking NBS1 not only recruit cGAS to a major fraction of micronuclear DNA but also activate cGAS in response to these micronuclear DNA. Collectively, our results underscore how NBS1 and its binding partners prevent cGAS from binding micronuclear DNA, in addition to their classical functions in DDR signaling.
Collapse
Affiliation(s)
- Salim Abdisalaam
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Shibani Mukherjee
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Souparno Bhattacharya
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Sharda Kumari
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Debapriya Sinha
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Janice Ortega
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Guo-Min Li
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Hesham A Sadek
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Sunil Krishnan
- Department of Radiation Oncology, Mayo Clinic Florida, Jacksonville, FL 32082, USA
| | - Aroumougame Asaithamby
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| |
Collapse
|
11
|
Nakamura AJ. Beyond visualization of DNA double-strand breaks after radiation exposure. Int J Radiat Biol 2021; 98:522-527. [PMID: 33989105 DOI: 10.1080/09553002.2021.1930268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
PURPOSE Radiation science and radiation biology are fields where milestones have been set by numerous woman researchers, as represented by Marie Curie. This shows that it is a research field that is like a model of research diversity in modern society. In this review, I will describe what kind of research activities I have conducted as a Japanese woman researcher in the field of radiation science research. In addition, as a Japanese woman radiobiologist, I will describe the sense of mission I felt after the Fukushima Nuclear Power Plant accident and the research issues we must challenge in the future. CONCLUSION As a Japanese woman researcher, I have felt a bias in gender balance in the field of science in Japan. Also, after the Fukushima nuclear Power Plant accident, I sometimes felt that woman researchers would be more suitable when sharing research results and specialized knowledge with the general public. In recent years, the importance of STEAM (Science-Technology-Engineering-Art-Mathematics) education has been highlighted all over the world, and I believe that the field of radiation science falls exactly into the STEAM education category. STEAM education is for people of all gender. I hope that radiation science research will lead to various younger generations, and that the gender balance of Japanese scientific researchers will increase.
Collapse
Affiliation(s)
- Asako J Nakamura
- Department of Biological Science, College of Sciences, Ibaraki University, Mito, Japan
| |
Collapse
|
12
|
McPherson MT, Holub AS, Husbands AY, Petreaca RC. Mutation Spectra of the MRN (MRE11, RAD50, NBS1/NBN) Break Sensor in Cancer Cells. Cancers (Basel) 2020; 12:cancers12123794. [PMID: 33339169 PMCID: PMC7765586 DOI: 10.3390/cancers12123794] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 12/04/2020] [Accepted: 12/14/2020] [Indexed: 12/12/2022] Open
Abstract
Simple Summary A DNA double strand break cuts a chromosome in two and is one of the most dangerous forms of DNA damage. Improper repair can lead to various chromosomal re-arrangements that have been detected in almost all cancer cells. A complex of three proteins (MRE11, RAD50, NBS1 or NBN) detects chromosome breaks and orchestrates repair processes. Mutations in these “break sensor” genes have been described in a multitude of cancers. Here, we provide a comprehensive analysis of reported mutations from data deposited on the Catalogue of Somatic Mutations in Cancer (COSMIC) archive. We also undertake an evolutionary analysis of these genes with the aim to understand whether these mutations preferentially accumulate in conserved residues. Interestingly, we find that mutations are overrepresented in evolutionarily conserved residues of RAD50 and NBS1/NBN but not MRE11. Abstract The MRN complex (MRE11, RAD50, NBS1/NBN) is a DNA double strand break sensor in eukaryotes. The complex directly participates in, or coordinates, several activities at the break such as DNA resection, activation of the DNA damage checkpoint, chromatin remodeling and recruitment of the repair machinery. Mutations in components of the MRN complex have been described in cancer cells for several decades. Using the Catalogue of Somatic Mutations in Cancer (COSMIC) database, we characterized all the reported MRN mutations. This analysis revealed several hotspot frameshift mutations in all three genes that introduce premature stop codons and truncate large regions of the C-termini. We also found through evolutionary analyses that COSMIC mutations are enriched in conserved residues of NBS1/NBN and RAD50 but not in MRE11. Given that all three genes are important to carcinogenesis, we propose these differential enrichment patterns may reflect a more severe pleiotropic role for MRE11.
Collapse
|
13
|
Saito Y, Kobayashi J, Kanemaki MT, Komatsu K. RIF1 controls replication initiation and homologous recombination repair in a radiation dose-dependent manner. J Cell Sci 2020; 133:jcs240036. [PMID: 32434870 PMCID: PMC7328141 DOI: 10.1242/jcs.240036] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 04/29/2020] [Indexed: 01/13/2023] Open
Abstract
RIF1 controls both DNA replication timing and the DNA double-strand break (DSB) repair pathway to maintain genome integrity. However, it remains unclear how RIF1 links these two processes following exposure to ionizing radiation (IR). Here, we show that inhibition of homologous recombination repair (HRR) by RIF1 occurs in a dose-dependent manner and is controlled via DNA replication. RIF1 inhibits both DNA end resection and RAD51 accumulation after exposure to high doses of IR. Contrastingly, HRR inhibition by RIF1 is antagonized by BRCA1 after a low-dose IR exposure. At high IR doses, RIF1 suppresses replication initiation by dephosphorylating MCM helicase. Notably, the dephosphorylation of MCM helicase inhibits both DNA end resection and HRR, even without RIF1. Thus, our data show the importance of active DNA replication for HRR and suggest a common suppression mechanism for DNA replication and HRR at high IR doses, both of which are controlled by RIF1.This article has an associated First Person interview with the first author of the paper.
Collapse
Affiliation(s)
- Yuichiro Saito
- Department of Genome Repair Dynamics, Radiation Biology Center, Kyoto University, Yoshida Konoe, Sakyo-ku, Kyoto 606-8501, Japan
| | - Junya Kobayashi
- Department of Genome Repair Dynamics, Radiation Biology Center, Kyoto University, Yoshida Konoe, Sakyo-ku, Kyoto 606-8501, Japan
| | - Masato T Kanemaki
- Department of Chromosome Science, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
- Department of Genetics, SOKENDAI, Mishima, Shizuoka 411-8540, Japan
| | - Kenshi Komatsu
- Department of Genome Repair Dynamics, Radiation Biology Center, Kyoto University, Yoshida Konoe, Sakyo-ku, Kyoto 606-8501, Japan
| |
Collapse
|
14
|
Yang DW, Wang TM, Zhang JB, Li XZ, He YQ, Xiao R, Xue WQ, Zheng XH, Zhang PF, Zhang SD, Hu YZ, Shen GP, Chen M, Sun Y, Jia WH. Genome-wide association study identifies genetic susceptibility loci and pathways of radiation-induced acute oral mucositis. J Transl Med 2020; 18:224. [PMID: 32503578 PMCID: PMC7275566 DOI: 10.1186/s12967-020-02390-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 05/28/2020] [Indexed: 12/17/2022] Open
Abstract
Background Radiation-induced oral mucositis (OM) is one of the most common acute complications for head and neck cancer. Severe OM is associated with radiation treatment breaks, which harms successful tumor management. Radiogenomics studies have indicated that genetic variants are associated with adverse effects of radiotherapy. Methods A large-scale genome-wide scan was performed in 1467 nasopharyngeal carcinoma patients, including 753 treated with 2D-CRT from Genetic Architecture of the Radiotherapy Toxicity and Prognosis (GARTP) cohort and 714 treated with IMRT (192 from the GARTP and 522 newly recruited). Subgroup analysis by radiotherapy technique was further performed in the top associations. We also performed physical and regulatory mapping of the risk loci and gene set enrichment analysis of the candidate target genes. Results We identified 50 associated genomic loci and 64 genes via positional mapping, expression quantitative trait locus (eQTL) mapping, chromatin interaction mapping and gene-based analysis, and 36 of these loci were replicated in subgroup analysis. Interestingly, one of the top loci located in TNKS, a gene relevant to radiation toxicity, was associated with increased OM risk with OR = 3.72 of the lead SNP rs117157809 (95% CI 2.10–6.57; P = 6.33 × 10−6). Gene set analyses showed that the 64 candidate target genes were enriched in the biological processes of regulating telomere capping and maintenance and telomerase activity (Top P = 7.73 × 10−7). Conclusions These results enhance the biological understanding of radiotherapy toxicity. The association signals enriched in telomere function regulation implicate the potential underlying mechanism and warrant further functional investigation and potential individual radiotherapy applications.
Collapse
Affiliation(s)
- Da-Wei Yang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China.,School of Public Health, Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Tong-Min Wang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China
| | - Jiang-Bo Zhang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China
| | - Xi-Zhao Li
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China
| | - Yong-Qiao He
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China
| | - Ruowen Xiao
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China
| | - Wen-Qiong Xue
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China
| | - Xiao-Hui Zheng
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China
| | - Pei-Fen Zhang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China
| | - Shao-Dan Zhang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China
| | - Ye-Zhu Hu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China
| | - Guo-Ping Shen
- Department of Radiation Oncology, Sun Yat-sen University First Affiliated Hospital, Guangzhou, People's Republic of China
| | - Mingyuan Chen
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China.,Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China
| | - Ying Sun
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China.,Department of Radiation Oncology, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China
| | - Wei-Hua Jia
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China. .,School of Public Health, Sun Yat-sen University, Guangzhou, People's Republic of China. .,Department of Radiation Oncology, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, People's Republic of China.
| |
Collapse
|
15
|
Ha GH, Ji JH, Chae S, Park J, Kim S, Lee JK, Kim Y, Min S, Park JM, Kang TH, Lee H, Cho H, Lee CW. Pellino1 regulates reversible ATM activation via NBS1 ubiquitination at DNA double-strand breaks. Nat Commun 2019; 10:1577. [PMID: 30952868 PMCID: PMC6450972 DOI: 10.1038/s41467-019-09641-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 03/20/2019] [Indexed: 01/10/2023] Open
Abstract
DNA double-strand break (DSB) signaling and repair are critical for genome integrity. They rely on highly coordinated processes including posttranslational modifications of proteins. Here we show that Pellino1 (Peli1) is a DSB-responsive ubiquitin ligase required for the accumulation of DNA damage response proteins and efficient homologous recombination (HR) repair. Peli1 is activated by ATM-mediated phosphorylation. It is recruited to DSB sites in ATM- and γH2AX-dependent manners. Interaction of Peli1 with phosphorylated histone H2AX enables it to bind to and mediate the formation of K63-linked ubiquitination of NBS1, which subsequently results in feedback activation of ATM and promotes HR repair. Collectively, these results provide a DSB-responsive factor underlying the connection between ATM kinase and DSB-induced ubiquitination. Occurrence of DNA double-strand break (DSB) repair is important for genome integrity. Here, the authors reveal that Pellino1 is a DSB-responsive ubiquitin ligase required for promoting the accumulation of ATM and MRN complex at DSB sites via NBS1 ubiquitination.
Collapse
Affiliation(s)
- Geun-Hyoung Ha
- Department of Molecular Cell Biology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Suwon, 16419, Republic of Korea
| | - Jae-Hoon Ji
- Genomic Instability Research Center, Ajou University School of Medicine, Suwon, 16499, Republic of Korea.
| | - Sunyoung Chae
- Institute of Medical Science, Ajou University School of Medicine, Suwon, 16499, Republic of Korea
| | - Jihyun Park
- Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, Seoul, 06351, Republic of Korea
| | - Suhyeon Kim
- Department of Molecular Cell Biology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Suwon, 16419, Republic of Korea
| | - Jin-Kwan Lee
- Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, Seoul, 06351, Republic of Korea
| | - Yonghyeon Kim
- Department of Biochemistry and Molecular Biology, Ajou University School of Medicine, Suwon, 16499, Republic of Korea
| | - Sunwoo Min
- Genomic Instability Research Center, Ajou University School of Medicine, Suwon, 16499, Republic of Korea.,Department of Biochemistry and Molecular Biology, Ajou University School of Medicine, Suwon, 16499, Republic of Korea
| | - Jeong-Min Park
- Department of Biological Science, Dong-A University, Pusan, 49201, Republic of Korea
| | - Tae-Hong Kang
- Department of Biological Science, Dong-A University, Pusan, 49201, Republic of Korea
| | - Ho Lee
- Graduate School of Cancer Science and Policy, Research Institute, National Cancer Center, Goyang, 10408, Republic of Korea
| | - Hyeseong Cho
- Genomic Instability Research Center, Ajou University School of Medicine, Suwon, 16499, Republic of Korea. .,Department of Biochemistry and Molecular Biology, Ajou University School of Medicine, Suwon, 16499, Republic of Korea.
| | - Chang-Woo Lee
- Department of Molecular Cell Biology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Suwon, 16419, Republic of Korea. .,Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, Seoul, 06351, Republic of Korea.
| |
Collapse
|
16
|
Croft LV, Bolderson E, Adams MN, El-Kamand S, Kariawasam R, Cubeddu L, Gamsjaeger R, Richard DJ. Human single-stranded DNA binding protein 1 (hSSB1, OBFC2B), a critical component of the DNA damage response. Semin Cell Dev Biol 2019; 86:121-128. [DOI: 10.1016/j.semcdb.2018.03.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 03/21/2018] [Accepted: 03/22/2018] [Indexed: 12/18/2022]
|
17
|
Mechanistic link between DNA damage sensing, repairing and signaling factors and immune signaling. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2019; 115:297-324. [PMID: 30798935 DOI: 10.1016/bs.apcsb.2018.11.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Previously, DNA damage sensing, repairing and signaling machineries were thought to mainly suppress genomic instability in response to genotoxic stress. Emerging evidence indicates a crosstalk between DNA repair machinery and the immune system. In this chapter, we attempt to decipher the molecular choreography of how factors, including ATM, BRCA1, DNA-PK, FANCA/D2, MRE11, MUS81, NBS1, RAD51 and TREX1, of multiple DNA metabolic processes are directly or indirectly involved in suppressing cytosolic DNA sensing pathway-mediated immune signaling. We provide systematic details showing how different DDR factors' roles in modulating immune signaling are not direct, but are rather a consequence of their inherent ability to sense, repair and signal in response to DNA damage. Unexpectedly, most DDR factors negatively impact the immune system; that is, the immune system shows defective signaling if there are defects in DNA repair pathways. Thus, in addition to their known DNA repair and replication functions, DDR factors help prevent erroneous activation of immune signaling. A more precise understanding of the mechanisms by which different DDR factors function in immune signaling can be exploited to redirect the immune system for both preventing and treating autoimmunity, cellular senescence and cancer in humans.
Collapse
|
18
|
Chen MY, Hsu WC, Hsu SC, Yang YS, Chuang TH, Lin WJ, Tan TH, Su YW. PP4 deficiency leads to DNA replication stress that impairs immunoglobulin class switch efficiency. Cell Death Differ 2018; 26:1221-1234. [PMID: 30237510 PMCID: PMC6748143 DOI: 10.1038/s41418-018-0199-z] [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: 02/20/2018] [Revised: 07/30/2018] [Accepted: 08/27/2018] [Indexed: 01/02/2023] Open
Abstract
The serine/threonine phosphatase PP4 has been implicated in DNA damage repair and cell cycle regulation through its dephosphorylation of specific substrates. We previously showed that PP4 is required for mouse B cell development, germinal center (GC) formation and immunoglobulin (Ig) class switch recombination (CSR). Here, we investigate the mechanisms underlying this requirement and demonstrate that murine PP4-deficient B lymphocytes have a defect in cell proliferation. Strikingly, the DNA damage response pathway that involves ATM/p53 and is linked to cell cycle arrest and impaired cell survival is strongly induced in these mutant B cells. In response to LPS + IL-4, stimuli that trigger IgG1 production, these PP4-deficient B cells show inefficient phosphorylation of ATR, leading to reduced retention of γH2AX-NBS1 complexes at sites of DNA damage, and compromised switching to IgG1. However, beyond the cell proliferation phase, conditional deletion of PP4 under the control of AID/cre completely restores normal IgG1 production in mutant B cell cultures. In vivo, co-deletion of PP4 and p53 by AID/cre partially rescues switching to IgG1 in B cells of mice immunized with TNP-KLH. Our findings establish that PP4 is indispensable for preventing DNA replication stress that could interfere with CSR, thereby promoting antibody switching during the humoral immune response.
Collapse
Affiliation(s)
- Ming-Yu Chen
- Immunology Research Center, National Health Research Institutes (NHRI), Zhunan, Miaoli County, Taiwan
| | - Wei-Chan Hsu
- Immunology Research Center, National Health Research Institutes (NHRI), Zhunan, Miaoli County, Taiwan
| | - Shu-Ching Hsu
- National Institute of Infectious Diseases and Vaccinology, NHRI, Zhunan, Miaoli County, Taiwan.,Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Medical Research and Development, Chang Bing Show Chwan Memorial Hospital, Chang Hua, Taiwan
| | - Yu-Shao Yang
- National Institute of Infectious Diseases and Vaccinology, NHRI, Zhunan, Miaoli County, Taiwan
| | - Tsung-Hsien Chuang
- Immunology Research Center, National Health Research Institutes (NHRI), Zhunan, Miaoli County, Taiwan
| | - Wen-Jye Lin
- Immunology Research Center, National Health Research Institutes (NHRI), Zhunan, Miaoli County, Taiwan
| | - Tse-Hua Tan
- Immunology Research Center, National Health Research Institutes (NHRI), Zhunan, Miaoli County, Taiwan.,Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX, USA
| | - Yu-Wen Su
- Immunology Research Center, National Health Research Institutes (NHRI), Zhunan, Miaoli County, Taiwan.
| |
Collapse
|
19
|
Oxidative stress, mitochondrial abnormalities and antioxidant defense in Ataxia-telangiectasia, Bloom syndrome and Nijmegen breakage syndrome. Redox Biol 2016; 11:375-383. [PMID: 28063379 PMCID: PMC5219618 DOI: 10.1016/j.redox.2016.12.030] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 12/27/2016] [Indexed: 12/31/2022] Open
Abstract
Rare pleiotropic genetic disorders, Ataxia-telangiectasia (A-T), Bloom syndrome (BS) and Nijmegen breakage syndrome (NBS) are characterised by immunodeficiency, extreme radiosensitivity, higher cancer susceptibility, premature aging, neurodegeneration and insulin resistance. Some of these functional abnormalities can be explained by aberrant DNA damage response and chromosomal instability. It has been suggested that one possible common denominator of these conditions could be chronic oxidative stress caused by endogenous ROS overproduction and impairment of mitochondrial homeostasis. Recent studies indicate new, alternative sources of oxidative stress in A-T, BS and NBS cells, including NADPH oxidase 4 (NOX4), oxidised low-density lipoprotein (ox-LDL) or Poly (ADP-ribose) polymerases (PARP). Mitochondrial abnormalities such as changes in the ultrastructure and function of mitochondria, excess mROS production as well as mitochondrial damage have also been reported in A-T, BS and NBS cells. A-T, BS and NBS cells are inextricably linked to high levels of reactive oxygen species (ROS), and thereby, chronic oxidative stress may be a major phenotypic hallmark in these diseases. Due to the presence of mitochondrial disturbances, A-T, BS and NBS may be considered mitochondrial diseases. Excess activity of antioxidant enzymes and an insufficient amount of low molecular weight antioxidants indicate new pharmacological strategies for patients suffering from the aforementioned diseases. However, at the current stage of research we are unable to ascertain if antioxidants and free radical scavengers can improve the condition or prolong the survival time of A-T, BS and NBS patients. Therefore, it is necessary to conduct experimental studies in a human model.
Collapse
|
20
|
Zhang XY, Zhang P. Sensitization strategies in lung cancer. Oncol Lett 2016; 12:3669-3673. [PMID: 27900051 PMCID: PMC5104149 DOI: 10.3892/ol.2016.5146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 09/06/2016] [Indexed: 01/03/2023] Open
Abstract
The commonly used treatment avenues employed by cancer physicians include surgery, radiotherapy (RT) and chemotherapy in addition to rapid developmental and confirmatory studies on the efficacy of targeted therapies. However, the success rate in these commonly used treatments remains relatively low due to associated side effects, such as normal cell targeting/toxicity and resistance. In addition, investigators are continuing their efforts to enhance the efficacy of RT and chemotherapy to prevent associated side effects and improve the survival rate of the affected patient in order to increase patient survival. In the present study, we have reviewed the sensitization approaches used to improve chemotherapy and RT sensitivity in tumors.
Collapse
Affiliation(s)
- Xiao-Ying Zhang
- Nanjing University of Chinese Medicine, Information Institute, Nanjing, Jiangsu 210029, P.R. China
| | - Peiying Zhang
- Department of Cardiology, Xuzhou Central Hospital, The Affiliated Xuzhou Hospital of Medical College of Southeast University, Xuzhou, Jiangsu 221009, P.R. China
| |
Collapse
|
21
|
Komatsu K. NBS1 and multiple regulations of DNA damage response. JOURNAL OF RADIATION RESEARCH 2016; 57 Suppl 1:i11-i17. [PMID: 27068998 PMCID: PMC4990113 DOI: 10.1093/jrr/rrw031] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Revised: 02/09/2016] [Accepted: 02/13/2016] [Indexed: 05/19/2023]
Abstract
DNA damage response is finely tuned, with several pathways including those for DNA repair, chromatin remodeling and cell cycle checkpoint, although most studies to date have focused on single pathways. Genetic diseases characterized by genome instability have provided novel insights into the underlying mechanisms of DNA damage response. NBS1, a protein responsible for the radiation-sensitive autosomal recessive disorder Nijmegen breakage syndrome, is one of the first factors to accumulate at sites of DNA double-strand breaks (DSBs). NBS1 binds to at least five key proteins, including ATM, RPA, MRE11, RAD18 and RNF20, in the conserved regions within a limited span of the C terminus, functioning in the regulation of chromatin remodeling, cell cycle checkpoint and DNA repair in response to DSBs. In this article, we reviewed the functions of these binding proteins and their comprehensive association with NBS1.
Collapse
Affiliation(s)
- Kenshi Komatsu
- Division of Genome Repair Dynamics, Radiation Biology Center, Kyoto University, Yoshida-Konoecho, Sakyo-Ku, Kyoto 606-8501, Japan
| |
Collapse
|
22
|
Shimada M, Matsuzaki F, Kato A, Kobayashi J, Matsumoto T, Komatsu K. Induction of Excess Centrosomes in Neural Progenitor Cells during the Development of Radiation-Induced Microcephaly. PLoS One 2016; 11:e0158236. [PMID: 27367050 PMCID: PMC4930206 DOI: 10.1371/journal.pone.0158236] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 06/12/2016] [Indexed: 11/19/2022] Open
Abstract
The embryonic brain is one of the tissues most vulnerable to ionizing radiation. In this study, we showed that ionizing radiation induces apoptosis in the neural progenitors of the mouse cerebral cortex, and that the surviving progenitor cells subsequently develop a considerable amount of supernumerary centrosomes. When mouse embryos at Day 13.5 were exposed to γ-rays, brains sizes were reduced markedly in a dose-dependent manner, and these size reductions persisted until birth. Immunostaining with caspase-3 antibodies showed that apoptosis occurred in 35% and 40% of neural progenitor cells at 4 h after exposure to 1 and 2 Gy, respectively, and this was accompanied by a disruption of the apical layer in which mitotic spindles were positioned in unirradiated mice. At 24 h after 1 Gy irradiation, the apoptotic cells were completely eliminated and proliferation was restored to a level similar to that of unirradiated cells, but numerous spindles were localized outside the apical layer. Similarly, abnormal cytokinesis, which included multipolar division and centrosome clustering, was observed in 19% and 24% of the surviving neural progenitor cells at 48 h after irradiation with 1 and 2 Gy, respectively. Because these cytokinesis aberrations derived from excess centrosomes result in growth delay and mitotic catastrophe-mediated cell elimination, our findings suggest that, in addition to apoptosis at an early stage of radiation exposure, radiation-induced centrosome overduplication could contribute to the depletion of neural progenitors and thereby lead to microcephaly.
Collapse
Affiliation(s)
- Mikio Shimada
- Department of Genome Repair Dynamics, Radiation Biology Center, Kyoto University, Kyoto, Japan
| | - Fumio Matsuzaki
- Laboratory for Cell Asymmetry, Center for Developmental Biology, RIKEN, Kobe, Japan
| | - Akihiro Kato
- Department of Genome Repair Dynamics, Radiation Biology Center, Kyoto University, Kyoto, Japan
| | - Junya Kobayashi
- Department of Genome Repair Dynamics, Radiation Biology Center, Kyoto University, Kyoto, Japan
| | - Tomohiro Matsumoto
- Department of Radiation System Biology, Radiation Biology Center, Kyoto University, Kyoto, Japan
| | - Kenshi Komatsu
- Department of Genome Repair Dynamics, Radiation Biology Center, Kyoto University, Kyoto, Japan
- * E-mail:
| |
Collapse
|
23
|
Sakai D, Dixon J, Achilleos A, Dixon M, Trainor PA. Prevention of Treacher Collins syndrome craniofacial anomalies in mouse models via maternal antioxidant supplementation. Nat Commun 2016; 7:10328. [PMID: 26792133 PMCID: PMC4735750 DOI: 10.1038/ncomms10328] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Accepted: 12/02/2015] [Indexed: 12/25/2022] Open
Abstract
Craniofacial anomalies account for approximately one-third of all birth defects and are a significant cause of infant mortality. Since the majority of the bones, cartilage and connective tissues that comprise the head and face are derived from a multipotent migratory progenitor cell population called the neural crest, craniofacial disorders are typically attributed to defects in neural crest cell development. Treacher Collins syndrome (TCS) is a disorder of craniofacial development and although TCS arises primarily through autosomal dominant mutations in TCOF1, no clear genotype-phenotype correlation has been documented. Here we show that Tcof1 haploinsufficiency results in oxidative stress-induced DNA damage and neuroepithelial cell death. Consistent with this discovery, maternal treatment with antioxidants minimizes cell death in the neuroepithelium and substantially ameliorates or prevents the pathogenesis of craniofacial anomalies in Tcof1(+/-) mice. Thus maternal antioxidant dietary supplementation may provide an avenue for protection against the pathogenesis of TCS and similar neurocristopathies.
Collapse
Affiliation(s)
- Daisuke Sakai
- Organization for Research Initiatives and Development, Doshisha University, Karasuma Higashi-iru, Imadegawa-dori, Kamigyo, Kyoto 602-8580, Japan
| | - Jill Dixon
- Dental School, Faculty of Medical and Human Sciences, Manchester Academic Health Sciences Centre, Michael Smith Building, University of Manchester, Oxford Road, Manchester M13 9PT, UK
| | - Annita Achilleos
- Stowers Institute for Medical Research, 1000 E. 50th Street, Kansas City, Missouri 64110, USA
| | - Michael Dixon
- Dental School, Faculty of Medical and Human Sciences, Manchester Academic Health Sciences Centre, Michael Smith Building, University of Manchester, Oxford Road, Manchester M13 9PT, UK
- Faculty of Life Sciences, Michael Smith Building, University of Manchester, Oxford Road, Manchester M13 9PT, UK
| | - Paul A. Trainor
- Stowers Institute for Medical Research, 1000 E. 50th Street, Kansas City, Missouri 64110, USA
- Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City, Kansas 66160, USA
| |
Collapse
|
24
|
Teng YC, Shen ZQ, Kao CH, Tsai TF. Hepatocellular carcinoma mouse models: Hepatitis B virus-associated hepatocarcinogenesis and haploinsufficient tumor suppressor genes. World J Gastroenterol 2016; 22:300-325. [PMID: 26755878 PMCID: PMC4698494 DOI: 10.3748/wjg.v22.i1.300] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 10/14/2015] [Accepted: 11/24/2015] [Indexed: 02/06/2023] Open
Abstract
The multifactorial and multistage pathogenesis of hepatocellular carcinoma (HCC) has fascinated a wide spectrum of scientists for decades. While a number of major risk factors have been identified, their mechanistic roles in hepatocarcinogenesis still need to be elucidated. Many tumor suppressor genes (TSGs) have been identified as being involved in HCC. These TSGs can be classified into two groups depending on the situation with respect to allelic mutation/loss in the tumors: the recessive TSGs with two required mutated alleles and the haploinsufficient TSGs with one required mutated allele. Hepatitis B virus (HBV) is one of the most important risk factors associated with HCC. Although mice cannot be infected with HBV due to the narrow host range of HBV and the lack of a proper receptor, one advantage of mouse models for HBV/HCC research is the numerous and powerful genetic tools that help investigate the phenotypic effects of viral proteins and allow the dissection of the dose-dependent action of TSGs. Here, we mainly focus on the application of mouse models in relation to HBV-associated HCC and on TSGs that act either in a recessive or in a haploinsufficient manner. Discoveries obtained using mouse models will have a great impact on HCC translational medicine.
Collapse
|
25
|
Acetylation of Histone H2AX at Lys 5 by the TIP60 Histone Acetyltransferase Complex Is Essential for the Dynamic Binding of NBS1 to Damaged Chromatin. Mol Cell Biol 2015; 35:4147-57. [PMID: 26438602 DOI: 10.1128/mcb.00757-15] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 10/02/2015] [Indexed: 11/20/2022] Open
Abstract
The association and dissociation of DNA damage response (DDR) factors with damaged chromatin occurs dynamically, which is crucial for the activation of DDR signaling in a spatiotemporal manner. We previously showed that the TIP60 histone acetyltransferase complex acetylates histone H2AX, to facilitate H2AX exchange at sites of DNA damage. However, it remained unclear how the acetylation of histone H2AX by TIP60 is related to the DDR signaling. We found that the acetylation but not the phosphorylation of H2AX is essential for the turnover of NBS1 on damaged chromatin. The loss of H2AX acetylation at Lys 5 by TIP60 in cells disturbed the accumulation of NBS1 at sites of DNA damage. Although the phosphorylation of H2AX is also reportedly required for the retention of NBS1 at damage sites, our data indicated that the acetylation-dependent NBS1 turnover by TIP60 on damaged chromatin restricts the dispersal of NBS1 foci from the sites of DNA damage. These findings indicate the importance of the acetylation-dependent dynamic binding of NBS1 to damaged chromatin, created by histone H2AX exchange, for the proper accumulation of NBS1 at DNA damage sites.
Collapse
|
26
|
Kałużna EM, Rembowska J, Ziółkowska-Suchanek I, Świątek-Kościelna B, Gabryel P, Dyszkiewicz W, Nowak JS. Heterozygous p.I171V mutation of the NBN gene as a risk factor for lung cancer development. Oncol Lett 2015; 10:3300-3304. [PMID: 26722329 DOI: 10.3892/ol.2015.3715] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Accepted: 08/17/2015] [Indexed: 11/06/2022] Open
Abstract
The NBN gene, also known as NBS1, is located on the chromosome band 8q21.3, and encodes a 754-amino acid-long protein named nibrin. This protein is a member of the MRE1-RAD50-NBN nuclear complex, and is involved in numerous cell processes essential for maintaining genomic stability. Heterozygous variants in the NBN gene, including p.I171V, c.657del5 and p.R215W, have been described as risk factors for the development of several malignancies. However, there is no report regarding the association of these mutations with lung cancer thus far. Therefore, the present study aimed to evaluate whether there is an association between the heterozygous p.I171V, c.657del5 and p.R215W variants of the NBN gene and the risk of developing lung cancer. The frequency of these variants was estimated in a group of 453 adults diagnosed with non-small cell lung cancer (NSCLC) and in healthy controls (2,400 for p.I171V, 2,090 for c.657del5 and 498 for p.R215W). The p.I171V variant was assessed by restriction fragment length polymorphism analysis of polymerase chain reaction (PCR) products, using MunI (MfeI) restriction enzyme, whereas the c.657del5 and p.R215W variants were assessed by the PCR single-strand conformation polymorphism method. A significantly increased risk of developing lung cancer was observed for the p.I171V variant, which was present in 17 (3.75%) of the 453 cases of lung cancer and in 12 (0.5%) of the 2,400 healthy individuals (odds ratio, 7.759; P<0.0001). The results obtained indicated an association between the p.I171V mutation and the development of lung cancer. Therefore, this variant may be considered a risk factor for NSCLC. Prospective studies with larger groups of patients may reveal the potential impact of the p.I171V variant in the occurrence of lung cancer.
Collapse
Affiliation(s)
- Ewelina Maria Kałużna
- Department of Molecular Pathology, Institute of Human Genetics of the Polish Academy of Sciences, Poznań 60-479, Poland
| | - Jolanta Rembowska
- Department of Molecular Pathology, Institute of Human Genetics of the Polish Academy of Sciences, Poznań 60-479, Poland
| | - Iwona Ziółkowska-Suchanek
- Department of Molecular Pathology, Institute of Human Genetics of the Polish Academy of Sciences, Poznań 60-479, Poland
| | - Bogna Świątek-Kościelna
- Department of Molecular Pathology, Institute of Human Genetics of the Polish Academy of Sciences, Poznań 60-479, Poland
| | - Piotr Gabryel
- Department of Thoracic Surgery, University of Medical Sciences, Poznań 60-569, Poland
| | - Wojciech Dyszkiewicz
- Department of Thoracic Surgery, University of Medical Sciences, Poznań 60-569, Poland
| | - Jerzy Stanisław Nowak
- Department of Molecular Pathology, Institute of Human Genetics of the Polish Academy of Sciences, Poznań 60-479, Poland
| |
Collapse
|
27
|
Bhattacharjee V, Zhou Y, Yen TJ. A synthetic lethal screen identifies the Vitamin D receptor as a novel gemcitabine sensitizer in pancreatic cancer cells. Cell Cycle 2015; 13:3839-56. [PMID: 25558828 DOI: 10.4161/15384101.2014.967070] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Overcoming chemoresistance of pancreatic cancer (PCa) cells should significantly extend patient survival. The current treatment modalities rely on a variety of DNA damaging agents including gemcitabine, FOLFIRINOX, and Abraxane that activate cell cycle checkpoints, which allows cells to survive these drug treaments. Indeed, these treatment regimens have only extended patient survival by a few months. The complex microenvironment of PCa tumors has been shown to complicate drug delivery thus decreasing the sensitivity of PCa tumors to chemotherapy. In this study, a genome-wide siRNA library was used to conduct a synthetic lethal screen of Panc1 cells that was treated with gemcitabine. A sublethal dose (50 nM) of the drug was used to model situations of limiting drug availability to PCa tumors in vivo. Twenty-seven validated sensitizer genes were identified from the screen including the Vitamin D receptor (VDR). Gemcitabine sensitivity was shown to be VDR dependent in multiple PCa cell lines in clonogenic survival assays. Sensitization was not achieved through checkpoint override but rather through disrupting DNA repair. VDR knockdown disrupted the cells' ability to form phospho-γH2AX and Rad51 foci in response to gemcitabine treatment. Disruption of Rad51 foci formation, which compromises homologous recombination, was consistent with increased sensitivity of PCa cells to the PARP inhibitor Rucaparib. Thus inhibition of VDR in PCa cells provides a new way to enhance the efficacy of genotoxic drugs.
Collapse
Affiliation(s)
- V Bhattacharjee
- a Fox Chase Cancer Center ; Institute for Cancer Research ; Philadelphia , PA USA
| | | | | |
Collapse
|
28
|
Saito Y, Komatsu K. Functional Role of NBS1 in Radiation Damage Response and Translesion DNA Synthesis. Biomolecules 2015; 5:1990-2002. [PMID: 26308066 PMCID: PMC4598784 DOI: 10.3390/biom5031990] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 08/11/2015] [Accepted: 08/13/2015] [Indexed: 12/15/2022] Open
Abstract
Nijmegen breakage syndrome (NBS) is a recessive genetic disorder characterized by increased sensitivity to ionizing radiation (IR) and a high frequency of malignancies. NBS1, a product of the mutated gene in NBS, contains several protein interaction domains in the N-terminus and C-terminus. The C-terminus of NBS1 is essential for interactions with MRE11, a homologous recombination repair nuclease, and ATM, a key player in signal transduction after the generation of DNA double-strand breaks (DSBs), which is induced by IR. Moreover, NBS1 regulates chromatin remodeling during DSB repair by histone H2B ubiquitination through binding to RNF20 at the C-terminus. Thus, NBS1 is considered as the first protein to be recruited to DSB sites, wherein it acts as a sensor or mediator of DSB damage responses. In addition to DSB response, we showed that NBS1 initiates Polη-dependent translesion DNA synthesis by recruiting RAD18 through its binding at the NBS1 C-terminus after UV exposure, and it also functions after the generation of interstrand crosslink DNA damage. Thus, NBS1 has multifunctional roles in response to DNA damage from a variety of genotoxic agents, including IR.
Collapse
Affiliation(s)
- Yuichiro Saito
- Genome Repair Dynamics, Radiation Biology Center, Kyoto University, Yoshida Konoe, Sakyo-ku, Kyoto 606-8501, Japan.
| | - Kenshi Komatsu
- Genome Repair Dynamics, Radiation Biology Center, Kyoto University, Yoshida Konoe, Sakyo-ku, Kyoto 606-8501, Japan.
| |
Collapse
|
29
|
Saito Y, Zhou H, Kobayashi J. Chromatin modification and NBS1: their relationship in DNA double-strand break repair. Genes Genet Syst 2015; 90:195-208. [DOI: 10.1266/ggs.15-00010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Affiliation(s)
- Yuichiro Saito
- Department of Genome Repair Dynamics, Radiation Biology Center, Kyoto University
| | - Hui Zhou
- Department of Genome Repair Dynamics, Radiation Biology Center, Kyoto University
| | - Junya Kobayashi
- Department of Genome Repair Dynamics, Radiation Biology Center, Kyoto University
| |
Collapse
|
30
|
Jamsai D, O'Connor AE, O'Donnell L, Lo JCY, O'Bryan MK. Uncoupling of transcription and translation of Fanconi anemia (FANC) complex proteins during spermatogenesis. SPERMATOGENESIS 2014; 5:e979061. [PMID: 26413409 DOI: 10.4161/21565562.2014.979061] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Revised: 10/13/2014] [Accepted: 10/15/2014] [Indexed: 01/25/2023]
Abstract
Male germ cell genome integrity is critical for spermatogenesis, fertility and normal development of the offspring. Several DNA repair pathways exist in male germ cells. One such important pathway is the Fanconi anemia (FANC) pathway. Unlike in somatic cells, expression profiles and the role of the FANC pathway in germ cells remain largely unknown. In this study, we undertook an extensive expression analyses at both mRNA and protein levels of key components of the FANC pathway during spermatogenesis in the mouse. Herein we show that Fanc mRNAs and proteins displayed developmental enrichment within particular male germ cell types. Spermatogonia and pre-leptotene spermatocytes contained the majority of the FANC components examined i.e. complex I members FANCB, FANCG and FANCM, complex II members FANCD2 and FANCI, and complex III member FANCJ. Leptotene, zygotene and early pachytene spermatocytes contained FANCB, FANCG, FANCM and FANCD2. With the exception of FANCL, all FANC proteins examined were not detected in round spermatids. Elongating and elongated spermatids contained FANCB, FANCG, FANCL and FANCJ. qPCR analysis on isolated spermatocytes and round spermatids showed that Fancg, Fancl, Fancm, Fancd2, Fanci and Fancj mRNAs were expressed in both of these germ cell types, indicating that some degree of translational repression of these FANC proteins occurs during the transition from meiosis to spermiogenesis. Taken together, our findings raise the possibility that the assembly of FANC protein complexes in each of the male germ cell type is unique and may be distinct from the proposed model in mitotic cells.
Collapse
Affiliation(s)
- Duangporn Jamsai
- The Department of Anatomy and Developmental Biology; School of Biomedical Sciences; Faculty of Medicine; Nursing and Health Sciences; Monash University ; Victoria, Australia
| | - Anne E O'Connor
- The Department of Anatomy and Developmental Biology; School of Biomedical Sciences; Faculty of Medicine; Nursing and Health Sciences; Monash University ; Victoria, Australia
| | - Liza O'Donnell
- The Department of Anatomy and Developmental Biology; School of Biomedical Sciences; Faculty of Medicine; Nursing and Health Sciences; Monash University ; Victoria, Australia ; MIMR-PHI Institute of Medical Research ; Clayton, Victoria, Australia
| | - Jennifer Chi Yi Lo
- The Department of Anatomy and Developmental Biology; School of Biomedical Sciences; Faculty of Medicine; Nursing and Health Sciences; Monash University ; Victoria, Australia
| | - Moira K O'Bryan
- The Department of Anatomy and Developmental Biology; School of Biomedical Sciences; Faculty of Medicine; Nursing and Health Sciences; Monash University ; Victoria, Australia
| |
Collapse
|
31
|
Erbaykent-Tepedelen B, Karamil S, Gonen-Korkmaz C, Korkmaz KS. DNA damage response (DDR) via NKX3.1 expression in prostate cells. J Steroid Biochem Mol Biol 2014; 141:26-36. [PMID: 24434284 DOI: 10.1016/j.jsbmb.2014.01.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Revised: 01/03/2014] [Accepted: 01/06/2014] [Indexed: 01/19/2023]
Abstract
It has been reported that NKX3.1 an androgen-regulated homeobox gene restricted to prostate and testicular tissues, encodes a homeobox protein, which transcriptionally regulates oxidative damage responses and enhances topoisomerase I re-ligation by a direct interaction with the ATM protein in prostate cells. In this study, we aimed to investigate the role of NKX3.1 in DNA double-strand break (DSB) repair. We demonstrate that the DNA damage induced by CPT-11 (irinotecan, a topo I inhibitor), doxorubicin (a topo II inhibitor), and H2O2 (a mediator of oxidative damage), but not by etoposide (another topo II inhibitor), is negatively influenced by NKX3.1 expression. We also examined γH2AX((S139)) foci formation and observed that the overexpression of NKX3.1 resulted a remarkable decrease in the formation of γH2AX((S139)) foci. Intriguingly, we observed in NKX3.1 silencing studies that the depletion of NKX3.1 correlated with a significant decrease in the levels of p-ATM((S1981)) and γH2AX((S139)). The data imply that the DNA damage response (DDR) can be altered, perhaps via a decrease in the topoisomerase I re-ligation function; this is consistent with the physical association of NKX3.1 with DDR mediators upon treatment of both PC-3 and LNCaP cells with CPT-11. Furthermore, the depletion of NKX3.1 resulted in a G1/S progression via the facilitation of an increase in E2F stabilization concurrent with the suppressed DDR. Thus, the topoisomerase I inhibitor-mediated DNA damage enhanced the physical association of NKX3.1 with γH2AX((S139)) on the chromatin in LNCaP cells, whereas NKX3.1 in the soluble fraction was associated with p-ATM((S1981)) and RAD50 in these cells. Overall, the data suggest that androgens and NKX3.1 expression regulate the progression of the cell cycle and concurrently activate the DDR. Therefore, androgen withdrawal may augment the development of an error-prone phenotype and, subsequently, the loss of DNA damage control during prostate cancer progression.
Collapse
Affiliation(s)
- Burcu Erbaykent-Tepedelen
- Ege University, Faculty of Engineering, Department of Bioengineering, Cancer Biology Laboratory, Bornova, Izmir, Turkey.
| | - Selda Karamil
- Ege University, Faculty of Engineering, Department of Bioengineering, Cancer Biology Laboratory, Bornova, Izmir, Turkey.
| | - Ceren Gonen-Korkmaz
- Ege University, Faculty of Pharmacy, Department of Pharmacology, Bornova, Izmir, Turkey.
| | - Kemal S Korkmaz
- Ege University, Faculty of Engineering, Department of Bioengineering, Cancer Biology Laboratory, Bornova, Izmir, Turkey.
| |
Collapse
|
32
|
The ATM-mediated DNA-damage response. Mol Oncol 2013. [DOI: 10.1017/cbo9781139046947.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
33
|
Zhang G, Zeng Y, Liu Z, Wei W. Significant association between Nijmegen breakage syndrome 1 657del5 polymorphism and breast cancer risk. Tumour Biol 2013; 34:2753-7. [PMID: 23765759 DOI: 10.1007/s13277-013-0830-z] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Accepted: 04/29/2013] [Indexed: 11/30/2022] Open
Abstract
Many studies were published to evaluate the association between Nijmegen breakage syndrome 1 (NBS1) 657del5 polymorphism and breast cancer risk, but the results remained inconsistent. To derive a more precise estimation on the possible association, we performed a meta-analysis of previous published studies. Case-control studies on the association between NBS1 657del5 polymorphisms and breast cancer risk were included into this meta-analysis. We used the odds ratio (OR) with 95 % confidence interval (95 % CI) to assess the strength of the association. Ten studies with a total of 25,365 subjects were identified and included into this meta-analysis. Meta-analysis of those ten studies showed that there was a significant association between NBS1 657del5 polymorphisms and breast cancer risk (pooled OR = 2.66, 95 % CI 1.82-3.90, P < 0.001). The cumulative meta-analyses showed a trend of a more significant association between NBS1 657del5 polymorphisms and breast cancer risk as data accumulated by publication year. Thus, our meta-analysis suggests that there was a significant association between NBS1 657del5 polymorphisms and breast cancer risk, and NBS1 657del5 polymorphism results in an increased risk of breast cancer.
Collapse
Affiliation(s)
- Guofeng Zhang
- Department of General Surgery, Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065, China,
| | | | | | | |
Collapse
|
34
|
Abstract
Copy number variations (CNVs) encompass a variety of genetic alterations including deletions and amplifications and cluster in regions of the human genome with intrinsic instability. Small-sized CNVs can act as initial genetic changes giving rise to larger CNVs such as acquired somatic copy number aberrations (CNAs) promoting cancer formation. Previous studies provided evidence for CNVs as an underlying cause of elevated breast cancer risk when targeting breast cancer susceptibility genes and of accelerated breast cancer progression when targeting oncogenes. With the development of novel techniques for genome-wide detection of CNVs at increasingly higher resolution, it became possible to qualitatively and quantitatively analyse manifestation of DNA damage resulting from defects in any of the large variety of DNA double-strand break (DSB) repair mechanisms. Breast carcinogenesis, particularly in familial cases, has been linked with a defect in the homologous recombination (HR) pathway, which in turn switches damage removal towards alternative, more error-prone DSB repair pathways such as microhomology-mediated non-homologous end joining (mmNHEJ). Indeed, increased error-prone DSB repair activities were detected in peripheral blood lymphocytes from individuals with familial breast cancer risk independently of specific gene mutations. Intriguingly, sequence analysis of breakpoint regions revealed that the majority of genome aberrations found in breast cancer specimens are formed by mmNHEJ. Detection of pathway-specific error-prone DSB repair activities by functional testing was proposed to serve as biomarker for hereditary breast cancer risk and responsiveness to therapies targeting HR dysfunction. Identification of specific error-prone DSB repair mechanisms underlying CNAs and ultimately mammary tumour formation highlights potential targets for future breast cancer prevention regimens.
Collapse
|
35
|
Ota I, Okamoto N, Yane K, Takahashi A, Masui T, Hosoi H, Ohnishi T. Therapeutic strategies for head and neck cancer based on p53 status. Exp Ther Med 2012; 3:585-591. [PMID: 22969933 DOI: 10.3892/etm.2012.474] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Accepted: 12/19/2011] [Indexed: 12/15/2022] Open
Abstract
Squamous cell carcinomas of the head and neck (HNSCC) are one of the most common types of cancers worldwide, and despite advances in treatment, they still represent a clinical challenge. Inactivation of one or more components in the p53 signaling pathway is an extremely common event in human neoplasia, including HNSCC. The loss of p53 function is responsible for increased aggressiveness in cancers, while tumor chemoresistance and radioresistance can depend on deleted p53 expression, or on the expression of mutated-p53 proteins. Thus, consideration and manipulation of the p53 status during HNSCC cancer therapy should be considered. This review discusses the p53 signaling pathways activated by various cellular stresses, including exposure to cancer therapies. The recognition of the p53 status in cancer cells is a significant factor and could provide valuable assistance during the selection of an effective therapeutic approach.
Collapse
Affiliation(s)
- Ichiro Ota
- Department of Otolaryngology-Head and Neck Surgery, Nara Medical University, Kashihara, Nara 634-8522
| | | | | | | | | | | | | |
Collapse
|
36
|
Kim JH, Kononenko A, Erliandri I, Kim TA, Nakano M, Iida Y, Barrett JC, Oshimura M, Masumoto H, Earnshaw WC, Larionov V, Kouprina N. Human artificial chromosome (HAC) vector with a conditional centromere for correction of genetic deficiencies in human cells. Proc Natl Acad Sci U S A 2011; 108:20048-53. [PMID: 22123967 PMCID: PMC3250132 DOI: 10.1073/pnas.1114483108] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Human artificial chromosome (HAC)-based vectors offer a promising system for delivery and expression of full-length human genes of any size. HACs avoid the limited cloning capacity, lack of copy number control, and insertional mutagenesis caused by integration into host chromosomes that plague viral vectors. We previously described a synthetic HAC that can be easily eliminated from cell populations by inactivation of its conditional kinetochore. Here, we demonstrate the utility of this HAC, which has a unique gene acceptor site, for delivery of full-length genes and correction of genetic deficiencies in human cells. A battery of functional tests was performed to demonstrate expression of NBS1 and VHL genes from the HAC at physiological levels. We also show that phenotypes arising from stable gene expression can be reversed when cells are "cured" of the HAC by inactivating its kinetochore in proliferating cell populations, a feature that provides a control for phenotypic changes attributed to expression of HAC-encoded genes. This generation of human artificial chromosomes should be suitable for studies of gene function and therapeutic applications.
Collapse
MESH Headings
- Animals
- Autoantigens/metabolism
- CHO Cells
- Cell Cycle Proteins/genetics
- Centromere/genetics
- Centromere Protein A
- Chromosomal Proteins, Non-Histone/metabolism
- Chromosomes, Artificial, Human/genetics
- Chromosomes, Artificial, Yeast/genetics
- Cloning, Molecular
- Cricetinae
- Cricetulus
- Gene Expression
- Genetic Complementation Test
- Genetic Therapy/methods
- Genetic Vectors/genetics
- Genome, Human/genetics
- Humans
- In Situ Hybridization, Fluorescence
- Integrases/metabolism
- Mutagenesis, Insertional/genetics
- Nuclear Proteins/genetics
- Recombination, Genetic/genetics
- Von Hippel-Lindau Tumor Suppressor Protein/genetics
Collapse
Affiliation(s)
| | | | | | - Tae-Aug Kim
- Tumor and Stem Cell Biology, National Cancer Institute, Bethesda, MD 20892
| | - Megumi Nakano
- Kazusa DNA Research Institute, Kisarazu, Chiba 292-0818, Japan
| | - Yuichi Iida
- Institute of Regenerative Medicine and Biofunction, Tottori University, Tottori 683-8503, Japan
| | - J. Carl Barrett
- Translational Sciences for Oncology Innovative Medicine, AstraZeneca, Boston, MA 02451; and
| | - Mitsuo Oshimura
- Institute of Regenerative Medicine and Biofunction, Tottori University, Tottori 683-8503, Japan
| | | | - William C. Earnshaw
- Wellcome Trust Centre for Cell Biology, University of Edinburgh, Edinburgh EH14 4AS, Scotland
| | | | | |
Collapse
|
37
|
Hou YY, Toh MT, Wang X. NBS1 deficiency promotes genome instability by affecting DNA damage signaling pathway and impairing telomere integrity. Cell Biochem Funct 2011; 30:233-42. [PMID: 22161642 DOI: 10.1002/cbf.1840] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Revised: 11/03/2011] [Accepted: 11/10/2011] [Indexed: 11/06/2022]
Abstract
Studies revealed that Nijmegen Breakage Syndrome protein 1 (NBS1) plays an important role in maintaining genome stability, but the underlying mechanism is controversial and elusive. Our results using clinical samples showed that NBS1 was involved in ataxia-telangiectasia mutated (ATM)-dependent pathway. NBS1 deficiency severely affected the phosphorylation of ATM as well as its downstream targets. BrdU proliferation assay revealed a delay of NBS cells in inhibiting DNA synthesis after Doxorubicin (Dox) treatment. In addition, under higher concentrations of Dox, NBS cells exhibited a much lower level of apoptosis compared to their normal counterparts, indicating a resistance to Dox treatment. Accelerated telomere shortening was also observed in NBS fibroblasts, consistent with an early onset of cellular replicative senescence in vitro. This abnormality may be due to the shelterin protein telomeric binding factor 2 (TRF2) which was found to be upregulated in NBS fibroblasts. The dysregulation of telomere shortening rate and of TRF2 expression level leads to telomere fusions and cellular aneuploidy in NBS cells. Collectively, our results suggest a possible mechanism that NBS1 deficiency simultaneously affects ATM-dependent DNA damage signaling and TRF2-regulated telomere maintenance, which synergistically lead to genomic abnormalities.
Collapse
Affiliation(s)
- Yan Yan Hou
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | | | | |
Collapse
|
38
|
Haplotypes of DNA repair and cell cycle control genes, X-ray exposure, and risk of childhood acute lymphoblastic leukemia. Cancer Causes Control 2011; 22:1721-30. [PMID: 21987080 PMCID: PMC3206192 DOI: 10.1007/s10552-011-9848-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2011] [Accepted: 09/24/2011] [Indexed: 12/19/2022]
Abstract
BACKGROUND Acute leukemias of childhood are a heterogeneous group of malignancies characterized by cytogenetic abnormalities, such as translocations and changes in ploidy. These abnormalities may be influenced by altered DNA repair and cell cycle control processes. METHODS We examined the association between childhood acute lymphoblastic leukemia (ALL) and 32 genes in DNA repair and cell cycle pathways using a haplotype-based approach, among 377 childhood ALL cases and 448 controls enrolled during 1995-2002. RESULTS We found that haplotypes in APEX1, BRCA2, ERCC2, and RAD51 were significantly associated with total ALL, while haplotypes in NBN and XRCC4, and CDKN2A were associated with structural and numerical change subtypes, respectively. In addition, we observed statistically significant interaction between exposure to 3 or more diagnostic X-rays and haplotypes of XRCC4 on risk of structural abnormality-positive childhood ALL. CONCLUSIONS These results support a role of altered DNA repair and cell cycle processes in the risk of childhood ALL, and show that this genetic susceptibility can differ by cytogenetic subtype and may be modified by exposure to ionizing radiation. To our knowledge, our study is the first to broadly examine the DNA repair and cell cycle pathways using a haplotype approach in conjunction with X-ray exposures in childhood ALL risk. If confirmed, future studies are needed to identify specific functional SNPs in the regions of interest identified in this analysis.
Collapse
|
39
|
Erbaykent-Tepedelen B, Özmen B, Varisli L, Gonen-Korkmaz C, Debelec-Butuner B, Muhammed Syed H, Yilmazer-Cakmak O, Korkmaz KS. NKX3.1 contributes to S phase entry and regulates DNA damage response (DDR) in prostate cancer cell lines. Biochem Biophys Res Commun 2011; 414:123-8. [DOI: 10.1016/j.bbrc.2011.09.035] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2011] [Accepted: 09/07/2011] [Indexed: 12/15/2022]
|
40
|
Cal-Bakowska M, Litwin I, Bocer T, Wysocki R, Dziadkowiec D. The Swi2-Snf2-like protein Uls1 is involved in replication stress response. Nucleic Acids Res 2011; 39:8765-77. [PMID: 21764775 PMCID: PMC3203583 DOI: 10.1093/nar/gkr587] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The Saccharomyces cerevisiae Uls1 belongs to the Swi2–Snf2 family of DNA-dependent ATPases and a new protein family of SUMO-targeted ubiquitin ligases. Here, we examine a physiological role of Uls1 and report for the first time its involvement in response to replication stress. We found that deletion of ULS1 in cells lacking RAD52 caused a synthetic growth defect accompanied by prolonged S phase and aberrant cell morphology. uls1Δ also progressed slower through S phase upon MMS treatment and took longer to resolve replication intermediates during recovery. This suggests an important function for Uls1 during replication stress. Consistently, cells lacking Uls1 and endonuclease Mus81 were more sensitive to HU, MMS and CPT than single mus81Δ. Interestingly, deletion of ULS1 attenuated replication stress-related defects in sgs1Δ, such as sensitivity to HU and MMS while increasing the level of PCNA ubiquitination and Rad53 phosphorylation. Importantly, Uls1 interactions with Mus81 and Sgs1 were dependent on its helicase domain. We propose that Uls1 directs a subset of DNA structures arising during replication into the Sgs1-dependent pathway facilitating S phase progression. Thus, in the absence of Uls1 other modes of replication fork processing and repair are employed.
Collapse
Affiliation(s)
- Magdalena Cal-Bakowska
- Institute of Plant Biology, Faculty of Biological Sciences, University of Wrocław, 50-328 Wrocław, Poland
| | | | | | | | | |
Collapse
|
41
|
Smith TR, Liu-Mares W, Van Emburgh BO, Levine EA, Allen GO, Hill JW, Reis IM, Kresty LA, Pegram MD, Miller MS, Hu JJ. Genetic polymorphisms of multiple DNA repair pathways impact age at diagnosis and TP53 mutations in breast cancer. Carcinogenesis 2011; 32:1354-60. [PMID: 21700777 DOI: 10.1093/carcin/bgr117] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Defective DNA repair may contribute to early age and late stage at time of diagnosis and mutations in critical tumor suppressor genes, such as TP53 in breast cancer. Using DNA samples from 436 breast cancer cases (374 Caucasians and 62 African-Americans), we tested these associations with 18 non-synonymous single-nucleotide polymorphisms (nsSNPs) in four DNA repair pathways: (i) base excision repair: ADPRT V762A, APE1 D148E, XRCC1 R194W/R280H/R399Q and POLD1 R119H; (ii) double-strand break repair: NBS1 E185Q and XRCC3 T241M; (iii) mismatch repair: MLH1 I219V, MSH3 R940Q/T1036A and MSH6 G39E and (iv) nucleotide excision repair: ERCC2 D312N/K751Q, ERCC4 R415Q, ERCC5 D1104H and XPC A499V/K939Q. Younger age at diagnosis (<50) was associated with ERCC2 312 DN/NN genotypes [odds ratio (OR) = 1.76; 95% confidence interval (CI) = 1.10, 2.81] and NBS1 185 QQ genotype (OR = 3.09; 95% CI = 1.47, 6.49). The XPC 939 QQ genotype was associated with TP53 mutations (OR = 5.80; 95% CI = 2.23, 15.09). There was a significant trend associating younger age at diagnosis (<50) with increasing numbers of risk genotypes for ERCC2 312 DN/NN, MSH6 39 EE and NBS1 185 QQ (P(trend) < 0.001). A similar significant trend was also observed associating TP53 mutations with increasing numbers of risk genotypes for XRCC1 399 QQ, XPC 939 QQ, ERCC4 415 QQ and XPC 499 AA (P(trend) < 0.001). Our pilot data suggest that nsSNPs of multiple DNA repair pathways are associated with younger age at diagnosis and TP53 mutations in breast cancer and larger studies are warranted to further evaluate these associations.
Collapse
Affiliation(s)
- Tasha R Smith
- Sylvester Comprehensive Cancer Center, University of Miami Leonard Miller School of Medicine, Miami, FL 33136, USA
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Yin M, Liao Z, Huang YJ, Liu Z, Yuan X, Gomez D, Wang LE, Wei Q. Polymorphisms of homologous recombination genes and clinical outcomes of non-small cell lung cancer patients treated with definitive radiotherapy. PLoS One 2011; 6:e20055. [PMID: 21647442 PMCID: PMC3102071 DOI: 10.1371/journal.pone.0020055] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Accepted: 04/12/2011] [Indexed: 12/22/2022] Open
Abstract
The repair of DNA double-strand breaks (DSBs) is the major mechanism to maintain genomic stability in response to irradiation. We hypothesized that genetic polymorphisms in DSB repair genes may affect clinical outcomes among non-small cell lung cancer (NSCLC) patients treated with definitive radio(chemo)therapy. We genotyped six potentially functional single nucleotide polymorphisms (SNPs) (i.e., RAD51 −135G>C/rs1801320 and −172G>T/rs1801321, XRCC2 4234G>C/rs3218384 and R188H/rs3218536 G>A, XRCC3 T241M/rs861539 and NBN E185Q/rs1805794) and estimated their associations with overall survival (OS) and radiation pneumonitis (RP) in 228 NSCLC patients. We found a predictive role of RAD51 −135G>C SNP in RP development (adjusted hazard ratio [HR] = 0.52, 95% confidence interval [CI], 0.31–0.86, P = 0.010 for CG/CC vs. GG). We also found that RAD51 −135G>C and XRCC2 R188H SNPs were independent prognostic factors for overall survival (adjusted HR = 1.70, 95% CI, 1.14–2.62, P = 0.009 for CG/CC vs. GG; and adjusted HR = 1.70; 95% CI, 1.02–2.85, P = 0.043 for AG vs. GG, respectively) and that the SNP-survival association was most pronounced in the presence of RP. Our study suggests that HR genetic polymorphisms, particularly RAD51 −135G>C, may influence overall survival and radiation pneumonitis in NSCLC patients treated with definitive radio(chemo)therapy. Large studies are needed to confirm our findings.
Collapse
Affiliation(s)
- Ming Yin
- Department of Epidemiology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas, United States of America
| | - Zhongxing Liao
- Department of Radiation Oncology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas, United States of America
- * E-mail: (QW); (ZL)
| | - Yu-Jing Huang
- Department of Epidemiology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas, United States of America
| | - Zhensheng Liu
- Department of Epidemiology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas, United States of America
| | - Xianglin Yuan
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Daniel Gomez
- Department of Radiation Oncology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas, United States of America
| | - Li-E Wang
- Department of Epidemiology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas, United States of America
| | - Qingyi Wei
- Department of Epidemiology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas, United States of America
- * E-mail: (QW); (ZL)
| |
Collapse
|
43
|
Okamoto N, Takahashi A, Ota I, Ohnishi K, Mori E, Kondo N, Noda T, Nakagawa Y, Uemura H, Yane K, Hosoi H, Ohnishi T. siRNA targeted forNBS1enhances heat sensitivity in human anaplastic thyroid carcinoma cells. Int J Hyperthermia 2011; 27:297-304. [DOI: 10.3109/02656736.2010.545365] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
|
44
|
Nakada S. Abnormalities in DNA double-strand break response beyond primary immunodeficiency. Int J Hematol 2011; 93:425-433. [PMID: 21479981 DOI: 10.1007/s12185-011-0836-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2011] [Revised: 03/28/2011] [Accepted: 03/28/2011] [Indexed: 10/18/2022]
Abstract
V(D)J recombination and class switch recombination are achieved by the cooperative processes of recombination activation gene- or activation-induced cytidine deaminase-dependent DNA cleaving, DNA double-strand break (DSB) response signaling, and DNA repair. Primary immunodeficiency due to dysfunctional DNA recombination can be categorized as severe combined immunodeficiency or other conditions, based on the presence or absence of T cells. We can also classify these diseases as radiosensitive or non-radiosensitive immunodeficiencies. While diseases unable to trigger DNA cleavage do not exhibit radiosensitivity, dysfunction in DSB response signaling or repair does lead to radiosensitive immunodeficiency. Recent studies have begun to clarify the mechanisms underlying the molecular pathogenesis of such DNA DSB-related primary immunodeficiency.
Collapse
Affiliation(s)
- Shinichiro Nakada
- Center of Integrated Medical Research, School of Medicine, Keio University, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
| |
Collapse
|
45
|
Mosor M, Ziółkowska-Suchanek I, Roznowski K, Baranowska M, Januszkiewicz-Lewandowska D, Nowak J. RAD50 gene mutations are not likely a risk factor for breast cancer in Poland. Breast Cancer Res Treat 2010; 123:607-9. [PMID: 20571869 DOI: 10.1007/s10549-010-0992-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2010] [Accepted: 06/11/2010] [Indexed: 10/19/2022]
|
46
|
Jamil S, Stoica C, Hackett TL, Duronio V. MCL-1 localizes to sites of DNA damage and regulates DNA damage response. Cell Cycle 2010; 9:2843-55. [PMID: 20647761 DOI: 10.4161/cc.9.14.12354] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
MCL-1, a pro-survival member of the BCL-2 family, was previously shown to have functions in ATR-dependent Chk1 phosphorylation following DNA damage. To further delineate these functions, we explored possible differences in DNA damage response caused by lack of MCL-1 in mouse embryo fibroblasts (MEFs). As expected, Mcl-1(-/-) MEFs had delayed Chk1 phosphorylation following etoposide treatment, compared to wild type MEFs. However, their response to hydroxyurea, which causes a G(1)/S checkpoint response, was not significantly different. In addition, appearance of gamma-H2AX was delayed in the Mcl-1(-/-) MEFs treated with etoposide. We next investigated whether MCL-1 is present, together with other DNA damage response proteins, at the sites of DNA damage. Immunoprecipitation of etoposide-treated extracts with anti-MCL-1 antibody showed association of MCL-1 with gamma-H2AX as well as NBS1. Immunofluorescent staining for MCL-1 further showed increased co-staining of MCL-1 and NBS1 following DNA damage. By using a system that creates DNA double strand breaks at specific sites in the genome, we demonstrated that MCL-1 is recruited directly adjacent to the sites of damage. Finally, in a direct demonstration of the importance of MCL-1 in allowing proper repair of DNA damage, we found that treatment for two brief exposures to etoposide , followed by periods of recovery, which mimics the clinical situation of etoposide use, resulted in greater accumulation of chromosomal abnormalities in the MEFs that lacked MCL-1. Together, these data indicate an important role for MCL-1 in coordinating DNA damage mediated checkpoint response, and have broad implications for the importance of MCL-1 in maintenance of genome integrity.
Collapse
Affiliation(s)
- Sarwat Jamil
- Department of Medicine, University of British Columbia and Vancouver Coastal Health Research Institute, Vancouver, BC, Canada
| | | | | | | |
Collapse
|
47
|
Cha H, Lowe JM, Li H, Lee JS, Belova GI, Bulavin DV, Fornace AJ. Wip1 directly dephosphorylates gamma-H2AX and attenuates the DNA damage response. Cancer Res 2010; 70:4112-22. [PMID: 20460517 DOI: 10.1158/0008-5472.can-09-4244] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The integrity of DNA is constantly challenged throughout the life of a cell by both endogenous and exogenous stresses. A well-organized rapid damage response and proficient DNA repair, therefore, become critically important for maintaining genomic stability and cell survival. When DNA is damaged, the DNA damage response (DDR) can be initiated by alterations in chromosomal structure and histone modifications, such as the phosphorylation of the histone H2AX (the phosphorylated form is referred to as gamma-H2AX). gamma-H2AX plays a crucial role in recruiting DDR factors to damage sites for accurate DNA repair. On repair completion, gamma-H2AX must then be reverted to H2AX by dephosphorylation for attenuation of the DDR. Here, we report that the wild-type p53-induced phosphatase 1 (Wip1) phosphatase, which is often overexpressed in a variety of tumors, effectively dephosphorylates gamma-H2AX in vitro and in vivo. Ectopic expression of Wip1 significantly reduces the level of gamma-H2AX after ionizing as well as UV radiation. Forced premature dephosphorylation of gamma-H2AX by Wip1 disrupts recruitment of important DNA repair factors to damaged sites and delays DNA damage repair. Additionally, deletion of Wip1 enhances gamma-H2AX levels in cells undergoing constitutive oncogenic stress. Taken together, our studies show that Wip1 is an important mammalian phosphatase for gamma-H2AX and shows an additional mechanism for Wip1 in the tumor surveillance network.
Collapse
Affiliation(s)
- Hyukjin Cha
- Department of Biochemistry, Georgetown University, Washington, District of Columbia 20057-1468, USA.
| | | | | | | | | | | | | |
Collapse
|
48
|
Schuetz JM, MacArthur AC, Leach S, Lai AS, Gallagher RP, Connors JM, Gascoyne RD, Spinelli JJ, Brooks-Wilson AR. Genetic variation in the NBS1, MRE11, RAD50 and BLM genes and susceptibility to non-Hodgkin lymphoma. BMC MEDICAL GENETICS 2009; 10:117. [PMID: 19917125 PMCID: PMC2788526 DOI: 10.1186/1471-2350-10-117] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2009] [Accepted: 11/16/2009] [Indexed: 11/30/2022]
Abstract
BACKGROUND Translocations are hallmarks of non-Hodgkin lymphoma (NHL) genomes. Because lymphoid cell development processes require the creation and repair of double stranded breaks, it is not surprising that disruption of this type of DNA repair can cause cancer. The members of the MRE11-RAD50-NBS1 (MRN) complex and BLM have central roles in maintenance of DNA integrity. Severe mutations in any of these genes cause genetic disorders, some of which are characterized by increased risk of lymphoma. METHODS We surveyed the genetic variation in these genes in constitutional DNA of NHL patients by means of gene re-sequencing, then conducted genetic association tests for susceptibility to NHL in a population-based collection of 797 NHL cases and 793 controls. RESULTS 114 SNPs were discovered in our sequenced samples, 61% of which were novel and not previously reported in dbSNP. Although four variants, two in RAD50 and two in NBS1, showed association results suggestive of an effect on NHL, they were not significant after correction for multiple tests. CONCLUSION These results suggest an influence of RAD50 and NBS1 on susceptibility to diffuse large B-cell lymphoma and marginal zone lymphoma. Larger association and functional studies could confirm such a role.
Collapse
Affiliation(s)
- Johanna M Schuetz
- Canada's Michael Smith Genome Sciences Centre, BC Cancer Agency, Vancouver, BC, Canada
| | - Amy C MacArthur
- Cancer Control Research, BC Cancer Agency, Vancouver, BC, Canada
| | - Stephen Leach
- Canada's Michael Smith Genome Sciences Centre, BC Cancer Agency, Vancouver, BC, Canada
| | - Agnes S Lai
- Cancer Control Research, BC Cancer Agency, Vancouver, BC, Canada
| | | | - Joseph M Connors
- Division of Medical Oncology, BC Cancer Agency, Vancouver, BC, Canada
| | - Randy D Gascoyne
- Pathology, British Columbia Cancer Agency, Vancouver, BC, Canada
| | - John J Spinelli
- Cancer Control Research, BC Cancer Agency, Vancouver, BC, Canada
- School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada
| | - Angela R Brooks-Wilson
- Canada's Michael Smith Genome Sciences Centre, BC Cancer Agency, Vancouver, BC, Canada
- Department of Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, BC, Canada
| |
Collapse
|
49
|
Shimada M, Komatsu K. Emerging connection between centrosome and DNA repair machinery. JOURNAL OF RADIATION RESEARCH 2009; 50:295-301. [PMID: 19542690 DOI: 10.1269/jrr.09039] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Centrosomes function in proper cell division in animal cells. The centrosome consists of a pair of centrioles and the surrounding pericentriolar matrix (PCM). After cytokinesis, daughter cells each acquire one centrosome, which subsequently duplicates at the G1/S phase in a manner that is dependent upon CDK2/cyclin-E activity. Defects in the regulation of centrosome duplication lead to tumorigenesis through abnormal cell division and resulting inappropriate chromosome segregation. Therefore, maintenance of accurate centrosome number is important for cell fate. Excess number of centrosomes can be induced by several factors including ionizing radiation (IR). Recent studies have shown that several DNA repair proteins localize to the centrosome and are involved in the regulation of centrosome number possibly through cell cycle checkpoints or direct modification of centrosome proteins. Furthermore, it has been reported that the development of microcephaly is likely caused by defective expression of centrosome proteins, such as ASPM, which are also involved in the response to IR. The present review highlights centrosome duplication in association with genotoxic stresses and the regulatory mechanism mediated by DNA repair proteins.Translated and modified from Radiat. Biol. Res. Comm. Vol.43; 343-356 (2008.12, in Japanese).
Collapse
Affiliation(s)
- Mikio Shimada
- Department of Genome Repair Dynamics, Radiation Biology Center, Kyoto University, Kyoto, Japan.
| | | |
Collapse
|
50
|
Abuzeid WM, Jiang X, Shi G, Wang H, Paulson D, Araki K, Jungreis D, Carney J, O’Malley BW, Li D. Molecular disruption of RAD50 sensitizes human tumor cells to cisplatin-based chemotherapy. J Clin Invest 2009; 119:1974-85. [PMID: 19487811 PMCID: PMC2701852 DOI: 10.1172/jci33816] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2007] [Accepted: 03/19/2009] [Indexed: 11/17/2022] Open
Abstract
Platinum-based drugs that induce DNA damage are commonly used first-line chemotherapy agents for testicular, bladder, head and neck, lung, esophageal, stomach, and ovarian cancers. The inherent resistance of tumors to DNA damage often limits the therapeutic efficacy of these agents, such as cisplatin. An enhanced DNA repair and telomere maintenance response by the Mre11/Rad50/Nbs1 (MRN) complex is critical in driving this chemoresistance. We hypothesized therefore that the targeted impairment of native cellular MRN function could sensitize tumor cells to cisplatin. To test this, we designed what we believe to be a novel dominant-negative adenoviral vector containing a mutant RAD50 gene that significantly downregulated MRN expression and markedly disrupted MRN function in human squamous cell carcinoma cells. A combination of cisplatin and mutant RAD50 therapy produced significant tumor cytotoxicity in vitro, with a corresponding increase in DNA damage and telomere shortening. In cisplatin-resistant human squamous cell cancer xenografts in nude mice, this combination therapy caused dramatic tumor regression with increased apoptosis. Our findings suggest the use of targeted RAD50 disruption as what we believe to be a novel chemosensitizing approach for cancer therapy in the context of chemoresistance. This strategy is potentially applicable to several types of malignant tumors that demonstrate chemoresistance and may positively impact the treatment of these patients.
Collapse
Affiliation(s)
- Waleed M. Abuzeid
- Department of Otorhinolaryngology — Head and Neck Surgery, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
Department of Otolaryngology — Head and Neck Surgery, and
Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Xiaoling Jiang
- Department of Otorhinolaryngology — Head and Neck Surgery, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
Department of Otolaryngology — Head and Neck Surgery, and
Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Guoli Shi
- Department of Otorhinolaryngology — Head and Neck Surgery, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
Department of Otolaryngology — Head and Neck Surgery, and
Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Hui Wang
- Department of Otorhinolaryngology — Head and Neck Surgery, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
Department of Otolaryngology — Head and Neck Surgery, and
Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - David Paulson
- Department of Otorhinolaryngology — Head and Neck Surgery, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
Department of Otolaryngology — Head and Neck Surgery, and
Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Koji Araki
- Department of Otorhinolaryngology — Head and Neck Surgery, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
Department of Otolaryngology — Head and Neck Surgery, and
Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - David Jungreis
- Department of Otorhinolaryngology — Head and Neck Surgery, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
Department of Otolaryngology — Head and Neck Surgery, and
Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - James Carney
- Department of Otorhinolaryngology — Head and Neck Surgery, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
Department of Otolaryngology — Head and Neck Surgery, and
Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Bert W. O’Malley
- Department of Otorhinolaryngology — Head and Neck Surgery, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
Department of Otolaryngology — Head and Neck Surgery, and
Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Daqing Li
- Department of Otorhinolaryngology — Head and Neck Surgery, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
Department of Otolaryngology — Head and Neck Surgery, and
Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| |
Collapse
|