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Bai L, Li P, Xiang Y, Jiao X, Chen J, Song L, Liang Z, Liu Y, Zhu Y, Lu LY. BRCA1 safeguards genome integrity by activating chromosome asynapsis checkpoint to eliminate recombination-defective oocytes. Proc Natl Acad Sci U S A 2024; 121:e2401386121. [PMID: 38696471 PMCID: PMC11087798 DOI: 10.1073/pnas.2401386121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 03/14/2024] [Indexed: 05/04/2024] Open
Abstract
In the meiotic prophase, programmed DNA double-strand breaks are repaired by meiotic recombination. Recombination-defective meiocytes are eliminated to preserve genome integrity in gametes. BRCA1 is a critical protein in somatic homologous recombination, but studies have suggested that BRCA1 is dispensable for meiotic recombination. Here we show that BRCA1 is essential for meiotic recombination. Interestingly, BRCA1 also has a function in eliminating recombination-defective oocytes. Brca1 knockout (KO) rescues the survival of Dmc1 KO oocytes far more efficiently than removing CHK2, a vital component of the DNA damage checkpoint in oocytes. Mechanistically, BRCA1 activates chromosome asynapsis checkpoint by promoting ATR activity at unsynapsed chromosome axes in Dmc1 KO oocytes. Moreover, Brca1 KO also rescues the survival of asynaptic Spo11 KO oocytes. Collectively, our study not only unveils an unappreciated role of chromosome asynapsis in eliminating recombination-defective oocytes but also reveals the dual functions of BRCA1 in safeguarding oocyte genome integrity.
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Affiliation(s)
- Long Bai
- Key Laboratory of Reproductive Genetics (Ministry of Education) and Women’s Reproductive Health Laboratory of Zhejiang Province, Women’s Hospital, Zhejiang University School of Medicine, Hangzhou310006, China
| | - Peng Li
- Key Laboratory of Reproductive Genetics (Ministry of Education) and Women’s Reproductive Health Laboratory of Zhejiang Province, Women’s Hospital, Zhejiang University School of Medicine, Hangzhou310006, China
| | - Yu Xiang
- Key Laboratory of Reproductive Genetics (Ministry of Education) and Women’s Reproductive Health Laboratory of Zhejiang Province, Women’s Hospital, Zhejiang University School of Medicine, Hangzhou310006, China
| | - Xiaofei Jiao
- Key Laboratory of Reproductive Genetics (Ministry of Education) and Women’s Reproductive Health Laboratory of Zhejiang Province, Women’s Hospital, Zhejiang University School of Medicine, Hangzhou310006, China
- Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou310029, China
| | - Jiyuan Chen
- Key Laboratory of Reproductive Genetics (Ministry of Education) and Women’s Reproductive Health Laboratory of Zhejiang Province, Women’s Hospital, Zhejiang University School of Medicine, Hangzhou310006, China
- Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou310029, China
| | - Licun Song
- Key Laboratory of Reproductive Genetics (Ministry of Education) and Women’s Reproductive Health Laboratory of Zhejiang Province, Women’s Hospital, Zhejiang University School of Medicine, Hangzhou310006, China
- Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou310029, China
| | - Zhongyang Liang
- Key Laboratory of Reproductive Genetics (Ministry of Education) and Women’s Reproductive Health Laboratory of Zhejiang Province, Women’s Hospital, Zhejiang University School of Medicine, Hangzhou310006, China
- Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou310029, China
| | - Yidan Liu
- Zhejiang Provincial Key Laboratory of Precision Diagnosis and Therapy for Major Gynecological Diseases, Women’s Hospital, Zhejiang University School of Medicine, Hangzhou310006, China
| | - Yimin Zhu
- Key Laboratory of Reproductive Genetics (Ministry of Education) and Women’s Reproductive Health Laboratory of Zhejiang Province, Women’s Hospital, Zhejiang University School of Medicine, Hangzhou310006, China
- Department of Reproductive Endocrinology, Women’s Hospital, Zhejiang University School of Medicine, Hangzhou310006, China
| | - Lin-Yu Lu
- Key Laboratory of Reproductive Genetics (Ministry of Education) and Women’s Reproductive Health Laboratory of Zhejiang Province, Women’s Hospital, Zhejiang University School of Medicine, Hangzhou310006, China
- Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou310029, China
- Zhejiang University Cancer Center, Hangzhou310029, China
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2
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Haruna S, Okuda K, Shibata A, Isono M, Tateno K, Sato H, Oike T, Uchihara Y, Kato Y, Shibata A. Characterization of the signal transduction cascade for inflammatory gene expression in fibroblasts with ATM-ATR deficiencies after Ionizing radiation. Radiother Oncol 2024; 194:110198. [PMID: 38438016 DOI: 10.1016/j.radonc.2024.110198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 02/20/2024] [Accepted: 02/28/2024] [Indexed: 03/06/2024]
Abstract
BACKGROUND AND PURPOSE Ionizing radiation (IR) induces DNA double-strand breaks (DSBs), leading to micronuclei formation, which has emerged as a key mediator of inflammatory responses after IR. This study aimed to investigate the signaling cascade in inflammatory gene expression using fibroblasts harboring DNA damage response deficiency after exposure to IR. MATERIALS AND METHODS Micronuclei formation was examined in human dermal fibroblasts derived from patients with deficiencies in ATM, ATR, MRE11, XLF, Artemis, or BRCA2 after IR. RNA-sequencing analysis was performed to assess gene expression, pathway mapping, and the balance of transcriptional activity using the transcription factor-based downstream gene expression mapping (TDEM) method developed in this study. RESULTS Deficiencies in ATM, ATR, or MRE11 led to increased micronuclei formation after IR compared to normal cells. RNA-seq analysis revealed significant upregulation of inflammatory expression in cells deficient in ATM, ATR, or MRE11 following IR. Pathway mapping analysis identified the upregulation of RIG-I, MDA-5, IRF7, IL6, and interferon stimulated gene expression after IR. These changes were pronounced in cells deficient in ATM, ATR, or MRE11. TDEM analysis suggested the differential activation of STAT1/3-pathway between ATM and ATR deficiency. CONCLUSION Enhanced micronuclei formation upon ATM, ATR, or MRE11 deficiency activated the cGAS/STING, RIG-I-MDA-5-IRF7-IL6 pathway, resulting in its downstream interferon stimulated gene expression following exposure to IR. Our study provides comprehensive information regarding the status of inflammation-related gene expression under DSB repair deficiency after IR. The generated dataset may be useful in developing functional biomarkers to accurately identify patients sensitive to radiotherapy.
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Affiliation(s)
- Shunji Haruna
- Division of Molecular Oncological Pharmacy, Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo 105-8512, Japan
| | - Ken Okuda
- Division of Molecular Oncological Pharmacy, Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo 105-8512, Japan
| | - Akiko Shibata
- Gunma University Heavy Ion Medical Center, 3-39-22, Showa-machi, Maebashi, Gunma 371-8511, Japan
| | - Mayu Isono
- Division of Molecular Oncological Pharmacy, Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo 105-8512, Japan
| | - Kohei Tateno
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, 3-39-22, Showa-machi, Maebashi 371-8511, Japan
| | - Hiro Sato
- Gunma University Heavy Ion Medical Center, 3-39-22, Showa-machi, Maebashi, Gunma 371-8511, Japan; Department of Radiation Oncology, Gunma University Graduate School of Medicine, 3-39-22, Showa-machi, Maebashi, Gunma 371-8511, Japan
| | - Takahiro Oike
- Gunma University Heavy Ion Medical Center, 3-39-22, Showa-machi, Maebashi, Gunma 371-8511, Japan; Department of Radiation Oncology, Gunma University Graduate School of Medicine, 3-39-22, Showa-machi, Maebashi, Gunma 371-8511, Japan
| | - Yuki Uchihara
- Division of Molecular Oncological Pharmacy, Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo 105-8512, Japan
| | - Yu Kato
- Division of Molecular Oncological Pharmacy, Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo 105-8512, Japan.
| | - Atsushi Shibata
- Division of Molecular Oncological Pharmacy, Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo 105-8512, Japan.
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3
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Takada S, Weitering TJ, van Os NJH, Du L, Pico-Knijnenburg I, Kuipers TB, Mei H, Salzer E, Willemsen MAAP, Weemaes CMR, Pan-Hammarstrom Q, van der Burg M. Causative mechanisms and clinical impact of immunoglobulin deficiencies in ataxia telangiectasia. J Allergy Clin Immunol 2024; 153:1392-1405. [PMID: 38280573 DOI: 10.1016/j.jaci.2023.12.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 12/07/2023] [Accepted: 12/19/2023] [Indexed: 01/29/2024]
Abstract
BACKGROUND Ataxia telangiectasia (AT) is characterized by cerebellar ataxia, telangiectasia, immunodeficiency, and increased cancer susceptibility and is caused by mutations in the ataxia telangiectasia mutated (ATM) gene. The immunodeficiency comprises predominantly immunoglobulin deficiency, mainly IgA and IgG2, with a variable severity. So far, the exact mechanisms underlying the immunoglobulin deficiency, especially the variable severity, remain unelucidated. OBJECTIVE We characterized the clinical impact of immunoglobulin deficiencies in AT and elucidated their mechanisms in AT. METHODS We analyzed long-term immunoglobulin levels, immunophenotyping, and survival time in our cohort (n = 87, median age 16 years; maximum 64 years). Somatic hypermutation and class-switch junctions in B cells were analyzed by next-generation sequencing. Furthermore, an in vitro class-switching induction assay was performed, followed by RNA sequencing, to assess the effect of ATM inhibition. RESULTS Only the hyper-IgM AT phenotype significantly worsened survival time, while IgA or IgG2 deficiencies did not. The immunoglobulin levels showed predominantly decreased IgG2 and IgA. Moreover, flow cytometric analysis demonstrated reduced naive B and T lymphocytes and a deficiency of class-switched IgG2 and IgA memory B cells. Somatic hypermutation frequencies were lowered in IgA- and IgG2-deficient patients, indicating hampered germinal center reaction. In addition, the microhomology of switch junctions was elongated, suggesting alternative end joining during class-switch DNA repair. The in vitro class switching and proliferation were negatively affected by ATM inhibition. RNA sequencing analysis showed that ATM inhibitor influenced expression of germinal center reaction genes. CONCLUSION Immunoglobulin deficiency in AT is caused by disturbed development of class-switched memory B cells. ATM deficiency affects both germinal center reaction and choice of DNA-repair pathway in class switching.
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Affiliation(s)
- Sanami Takada
- Department of Pediatrics, Laboratory for Pediatric Immunology, Willem-Alexander Children's Hospital, Leiden University Medical Center, Leiden, The Netherlands
| | - Thomas J Weitering
- Department of Pediatrics, Laboratory for Pediatric Immunology, Willem-Alexander Children's Hospital, Leiden University Medical Center, Leiden, The Netherlands
| | - Nienke J H van Os
- Department of Pediatric Neurology, Amalia Children's Hospital, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands; Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Likun Du
- Department of Biosciences and Nutrition, Karolinska Institute, Stockholm, Sweden
| | - Ingrid Pico-Knijnenburg
- Department of Pediatrics, Laboratory for Pediatric Immunology, Willem-Alexander Children's Hospital, Leiden University Medical Center, Leiden, The Netherlands
| | - Thomas B Kuipers
- Sequencing Analysis Support Core Department of Biomedical Data Sciences, Leiden University Medical Center, Leiden, The Netherlands
| | - Hailiang Mei
- Sequencing Analysis Support Core Department of Biomedical Data Sciences, Leiden University Medical Center, Leiden, The Netherlands
| | - Elisabeth Salzer
- Department of Pediatrics, Laboratory for Pediatric Immunology, Willem-Alexander Children's Hospital, Leiden University Medical Center, Leiden, The Netherlands
| | - Michèl A A P Willemsen
- Department of Pediatric Neurology, Amalia Children's Hospital, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Corry M R Weemaes
- Department of Pediatrics, Amalia Children's Hospital, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Qiang Pan-Hammarstrom
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Mirjam van der Burg
- Department of Pediatrics, Laboratory for Pediatric Immunology, Willem-Alexander Children's Hospital, Leiden University Medical Center, Leiden, The Netherlands.
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Lukaszewicz A, Lange J, Keeney S, Jasin M. De novo deletions and duplications at recombination hotspots in mouse germlines. Cell 2021; 184:5970-5984.e18. [PMID: 34793701 PMCID: PMC8616837 DOI: 10.1016/j.cell.2021.10.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 08/10/2021] [Accepted: 10/27/2021] [Indexed: 11/23/2022]
Abstract
Numerous DNA double-strand breaks (DSBs) arise during meiosis to initiate homologous recombination. These DSBs are usually repaired faithfully, but here, we uncover a distinct type of mutational event in which deletions form via joining of ends from two closely spaced DSBs (double cuts) within a single hotspot or at adjacent hotspots on the same or different chromatids. Deletions occur in normal meiosis but are much more frequent when DSB formation is dysregulated in the absence of the ATM kinase. Events between chromosome homologs point to multi-chromatid damage and aborted gap repair. Some deletions contain DNA from other hotspots, indicating that double cutting at distant sites creates substrates for insertional mutagenesis. End joining at double cuts can also yield tandem duplications or extrachromosomal circles. Our findings highlight the importance of DSB regulation and reveal a previously hidden potential for meiotic mutagenesis that is likely to affect human health and genome evolution.
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Affiliation(s)
- Agnieszka Lukaszewicz
- Developmental Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Julian Lange
- Molecular Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Scott Keeney
- Molecular Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Memorial Sloan Kettering Cancer Center, Howard Hughes Medical Institute, New York, NY 10065, USA.
| | - Maria Jasin
- Developmental Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.
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5
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Duecker RP, Gronau L, Baer PC, Zielen S, Schubert R. Survival and Functional Immune Reconstitution After Haploidentical Stem Cell Transplantation in Atm-Deficient Mice. Front Immunol 2021; 12:693897. [PMID: 34267759 PMCID: PMC8276263 DOI: 10.3389/fimmu.2021.693897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 06/16/2021] [Indexed: 11/13/2022] Open
Abstract
Hematopoietic stem cell transplantation (HSCT) has been proposed as a promising therapeutic opportunity to improve immunity and prevent hematologic malignancies in Ataxia-telangiectasia (A-T). However, experience in the transplantation strategy for A-T patients is still scarce. The aim of this study was to investigate whether different approaches of HSCT are feasible in regard to graft versus host response and sufficient concerning functional immune reconstitution. Atm-deficient mice were treated with a clinically relevant non-myeloablative host-conditioning regimen and transplanted with CD90.2-depleted, green fluorescent protein (GFP)-expressing, and ataxia telangiectasia mutated (ATM)-competent bone marrow donor cells in a syngeneic, haploidentical or allogeneic setting. Like syngeneic HSCT, haploidentical HSCT, but not allogeneic HSCT extended the lifespan of Atm-deficient mice through the reduction of thymic tumors and normalized T-cell numbers. Donor-derived splenocytes isolated from transplanted Atm-deficient mice filled the gap of cell loss in the naïve T-cell population and raised CD4 cell functionality up to wild-type level. Interestingly, HSCT using heterozygous donor cells let to a significantly improved survival of Atm-deficient mice and increased CD4 cell numbers as well as CD4 cell functionality equivalent to HSCT using with wild-type donor cells. Our data provided evidence that haploidentical HSCT could be a feasible strategy for A-T, possibly even if the donor is heterozygous for ATM. However, this basic research cannot substitute any research in humans.
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Affiliation(s)
- Ruth Pia Duecker
- Division for Allergy, Pneumology and Cystic Fibrosis, Department for Children and Adolescence, Goethe-University, Frankfurt am Main, Germany
| | - Lucia Gronau
- Division for Allergy, Pneumology and Cystic Fibrosis, Department for Children and Adolescence, Goethe-University, Frankfurt am Main, Germany
| | - Patrick C. Baer
- Division of Nephrology, Department of Internal Medicine III, Goethe-University, Frankfurt am Main, Germany
| | - Stefan Zielen
- Division for Allergy, Pneumology and Cystic Fibrosis, Department for Children and Adolescence, Goethe-University, Frankfurt am Main, Germany
| | - Ralf Schubert
- Division for Allergy, Pneumology and Cystic Fibrosis, Department for Children and Adolescence, Goethe-University, Frankfurt am Main, Germany
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Almozyan S, Coulton J, Babaei-Jadidi R, Nateri AS. FLYWCH1, a Multi-Functional Zinc Finger Protein Contributes to the DNA Repair Pathway. Cells 2021; 10:cells10040889. [PMID: 33924684 PMCID: PMC8069811 DOI: 10.3390/cells10040889] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 04/05/2021] [Accepted: 04/12/2021] [Indexed: 12/12/2022] Open
Abstract
Over recent years, several Cys2-His2 (C2H2) domain-containing proteins have emerged as critical players in repairing DNA-double strand breaks. Human FLYWCH1 is a newly characterised nuclear transcription factor with (C2H2)-type zinc-finger DNA-binding domains. Yet, our knowledge about FLYWCH1 is still in its infancy. This study explores the expression, role and regulation of FLYWCH1 in the context of DNA damage and repair. We provide evidence suggesting a potential contribution of FLYWCH1 in facilitating the recruitment of DNA-damage response proteins (DDRPs). We found that FLYWCH1 colocalises with γH2AX in normal fibroblasts and colorectal cancer (CRC) cell lines. Importantly, our results showed that enforced expression of FLYWCH1 induces the expression of γH2AX, ATM and P53 proteins. Using an ATM-knockout (ATMKO) model, we indicated that FLYWCH1 mediates the phosphorylation of H2AX (Ser139) independently to ATM expression. On the other hand, the induction of DNA damage using UV-light induces the endogenous expression of FLYWCH1. Conversely, cisplatin treatment reduces the endogenous level of FLYWCH1 in CRC cell lines. Together, our findings uncover a novel FLYWCH1/H2AX phosphorylation axis in steady-state conditions and during the induction of the DNA-damage response (DDR). Although the role of FLYWCH1 within the DDR machinery remains largely uncharacterised and poorly understood, we here report for the first-time findings that implicate FLYWCH1 as a potential participant in the DNA damage response signaling pathways.
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Affiliation(s)
- Sheema Almozyan
- Cancer Genetics & Stem Cell Group, BioDiscovery Institute, Division of Cancer and Stem Cells, School of Medicine, University of Nottingham, Nottingham NG7 2UH, UK; (S.A.); (J.C.)
| | - James Coulton
- Cancer Genetics & Stem Cell Group, BioDiscovery Institute, Division of Cancer and Stem Cells, School of Medicine, University of Nottingham, Nottingham NG7 2UH, UK; (S.A.); (J.C.)
| | - Roya Babaei-Jadidi
- Respiratory Medicine, School of Medicine, University of Nottingham, Nottingham NG7 2UH, UK;
| | - Abdolrahman S. Nateri
- Cancer Genetics & Stem Cell Group, BioDiscovery Institute, Division of Cancer and Stem Cells, School of Medicine, University of Nottingham, Nottingham NG7 2UH, UK; (S.A.); (J.C.)
- Correspondence:
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7
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Martin OCB, Bergonzini A, Lopez Chiloeches M, Paparouna E, Butter D, Theodorou SDP, Haykal MM, Boutet-Robinet E, Tebaldi T, Wakeham A, Rhen M, Gorgoulis VG, Mak T, Pateras IS, Frisan T. Influence of the microenvironment on modulation of the host response by typhoid toxin. Cell Rep 2021; 35:108931. [PMID: 33826883 DOI: 10.1016/j.celrep.2021.108931] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 10/28/2020] [Accepted: 03/11/2021] [Indexed: 01/10/2023] Open
Abstract
Bacterial genotoxins cause DNA damage in eukaryotic cells, resulting in activation of the DNA damage response (DDR) in vitro. These toxins are produced by Gram-negative bacteria, enriched in the microbiota of inflammatory bowel disease (IBD) and colorectal cancer (CRC) patients. However, their role in infection remains poorly characterized. We address the role of typhoid toxin in modulation of the host-microbial interaction in health and disease. Infection with a genotoxigenic Salmonella protects mice from intestinal inflammation. We show that the presence of an active genotoxin promotes DNA fragmentation and senescence in vivo, which is uncoupled from an inflammatory response and unexpectedly associated with induction of an anti-inflammatory environment. The anti-inflammatory response is lost when infection occurs in mice with acute colitis. These data highlight a complex context-dependent crosstalk between bacterial-genotoxin-induced DDR and the host immune response, underlining an unexpected role for bacterial genotoxins.
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Affiliation(s)
- Océane C B Martin
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Anna Bergonzini
- Department of Molecular Biology, Umeå University, Umeå, Sweden; Umeå Centre for Microbial Research (UCMR), Umeå University, Umeå, Sweden
| | - Maria Lopez Chiloeches
- Department of Molecular Biology, Umeå University, Umeå, Sweden; Umeå Centre for Microbial Research (UCMR), Umeå University, Umeå, Sweden
| | - Eleni Paparouna
- Department of Histology and Embryology, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Deborah Butter
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Sofia D P Theodorou
- Department of Histology and Embryology, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Maria M Haykal
- Université Paris-Saclay, Institut Gustave Roussy, Inserm U981, Biomarqueurs prédictifs et nouvelles stratégies thérapeutiques en oncologie, 94800 Villejuif, France
| | - Elisa Boutet-Robinet
- Toxalim (Research Centre in Food Toxicology), Université de Toulouse, INRAE, ENVT, INP-Purpan, UPS, Toulouse, France
| | - Toma Tebaldi
- Center for Biomedical Data Science, Yale School of Medicine, New Haven, CT, USA
| | - Andrew Wakeham
- The Campbell Family Institute for Breast Cancer Research, Princess Margaret Hospital, University of Toronto, Toronto, ON, Canada
| | - Mikael Rhen
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - Vassilis G Gorgoulis
- Department of Histology and Embryology, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece; Biomedical Research Foundation, Academy of Athens, Athens, Greece; Institute for Cancer Sciences, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK; Manchester Centre for Cellular Metabolism, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - Tak Mak
- The Campbell Family Institute for Breast Cancer Research, Princess Margaret Hospital, University of Toronto, Toronto, ON, Canada
| | - Ioannis S Pateras
- Department of Histology and Embryology, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Teresa Frisan
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden; Department of Molecular Biology, Umeå University, Umeå, Sweden; Umeå Centre for Microbial Research (UCMR), Umeå University, Umeå, Sweden.
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8
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Deland K, Starr BF, Mercer JS, Byemerwa J, Crabtree DM, Williams NT, Luo L, Ma Y, Chen M, Becher OJ, Kirsch DG. Tumor genotype dictates radiosensitization after Atm deletion in primary brainstem glioma models. J Clin Invest 2021; 131:142158. [PMID: 32990677 PMCID: PMC7773366 DOI: 10.1172/jci142158] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 09/23/2020] [Indexed: 12/31/2022] Open
Abstract
Diffuse intrinsic pontine glioma (DIPG) kills more children than any other type of brain tumor. Despite clinical trials testing many chemotherapeutic agents, palliative radiotherapy remains the standard treatment. Here, we utilized Cre/loxP technology to show that deleting Ataxia telangiectasia mutated (Atm) in primary mouse models of DIPG can enhance tumor radiosensitivity. Genetic deletion of Atm improved survival of mice with p53-deficient but not p53 wild-type gliomas after radiotherapy. Similar to patients with DIPG, mice with p53 wild-type tumors had improved survival after radiotherapy independent of Atm deletion. Primary p53 wild-type tumor cell lines induced proapoptotic genes after radiation and repressed the NRF2 target, NAD(P)H quinone dehydrogenase 1 (Nqo1). Tumors lacking p53 and Ink4a/Arf expressed the highest level of Nqo1 and were most resistant to radiation, but deletion of Atm enhanced the radiation response. These results suggest that tumor genotype may determine whether inhibition of ATM during radiotherapy will be an effective clinical approach to treat DIPGs.
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Affiliation(s)
| | | | | | | | | | | | | | - Yan Ma
- Department of Radiation Oncology
| | - Mark Chen
- Department of Pharmacology & Cancer Biology
- Medical Scientist Training Program, Duke University Medical Center, Durham, North Carolina, USA
| | - Oren J. Becher
- Department of Pediatrics and
- Department of Biochemistry and Molecular Genetics, Northwestern University, Chicago, Illinois, USA
- Ann and Robert H. Lurie Children’s Hospital of Chicago, Chicago, Illinois, USA
| | - David G. Kirsch
- Department of Radiation Oncology
- Department of Pharmacology & Cancer Biology
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Abstract
Heart failure is a leading cause of death in the United States. Diabetes, also known as diabetes mellitus (DM), exponentially increases the risk of heart failure. The increase in oxidative stress and metabolic dysfunction caused by DM can lead to DNA damage and the development of diabetic cardiomyopathy. Ataxia telangiectasia mutated kinase (ATM) is a DNA damage response protein with a primary nuclear function to regulate cell cycle progression in response to double-strand DNA breaks, acts as a redox sensor, and facilitates DNA repair. ATM deficiency associates with the development of insulin resistance and DM. Consequently, patients with Ataxia telangiectasia, a rare autosomal recessive disorder, have an increased risk of developing heart failure. The main objective of this review is to summarize the shared metabolic and cardiac abnormalities associated with DM and ATM deficiency, with a focus on the development of heart failure.
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Affiliation(s)
- Mary C Wingard
- Department of Biomedical Sciences, James H Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
| | - Chad R Frasier
- Department of Biomedical Sciences, James H Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
| | - Mahipal Singh
- Department of Biomedical Sciences, James H Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
| | - Krishna Singh
- Department of Biomedical Sciences, James H Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA; Center of Excellence for Inflammation, Infectious Disease and Immunity, East Tennessee State University, Johnson City, TN 37614, USA; James H Quillen Veterans Affairs Medical Center, Mountain Home, TN 37684, USA.
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10
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Roger E, Gout J, Arnold F, Beutel AK, Müller M, Abaei A, Barth TFE, Rasche V, Seufferlein T, Perkhofer L, Kleger A. Maintenance Therapy for ATM-Deficient Pancreatic Cancer by Multiple DNA Damage Response Interferences after Platinum-Based Chemotherapy. Cells 2020; 9:cells9092110. [PMID: 32948057 PMCID: PMC7563330 DOI: 10.3390/cells9092110] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/11/2020] [Accepted: 09/14/2020] [Indexed: 12/12/2022] Open
Abstract
Personalized medicine in treating pancreatic ductal adenocarcinoma (PDAC) is still in its infancy, albeit PDAC-related deaths are projected to rise over the next decade. Only recently, maintenance therapy with the PARP inhibitor olaparib showed improved progression-free survival in germline BRCA1/2-mutated PDAC patients after platinum-based induction for the first time. Transferability of such a concept to other DNA damage response (DDR) genes remains unclear. Here, we conducted a placebo-controlled, three-armed preclinical trial to evaluate the efficacy of multi-DDR interference (mDDRi) as maintenance therapy vs. continuous FOLFIRINOX treatment, implemented with orthotopically transplanted ATM-deficient PDAC cell lines. Kaplan–Meier analysis, cross-sectional imaging, histology, and in vitro analysis served as analytical readouts. Median overall survival was significantly longer in the mDDRi maintenance arm compared to the maintained FOLFIRINOX treatment. This survival benefit was mirrored in the highest DNA-damage load, accompanied by superior disease control and reduced metastatic burden. In vitro analysis suggests FOLFIRINOX-driven selection of invasive subclones, erased by subsequent mDDRi treatment. Collectively, this preclinical trial substantiates mDDRi in a maintenance setting as a novel therapeutic option and extends the concept to non-germline BRCA1/2-mutant PDAC.
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Affiliation(s)
- Elodie Roger
- Department of Internal Medicine 1, University Medical Center Ulm, Albert-Einstein-Allee 23, 89081 Ulm, Germany; (E.R.); (J.G.); (F.A.); (A.K.B.); (T.S.)
| | - Johann Gout
- Department of Internal Medicine 1, University Medical Center Ulm, Albert-Einstein-Allee 23, 89081 Ulm, Germany; (E.R.); (J.G.); (F.A.); (A.K.B.); (T.S.)
| | - Frank Arnold
- Department of Internal Medicine 1, University Medical Center Ulm, Albert-Einstein-Allee 23, 89081 Ulm, Germany; (E.R.); (J.G.); (F.A.); (A.K.B.); (T.S.)
| | - Alica K. Beutel
- Department of Internal Medicine 1, University Medical Center Ulm, Albert-Einstein-Allee 23, 89081 Ulm, Germany; (E.R.); (J.G.); (F.A.); (A.K.B.); (T.S.)
| | - Martin Müller
- Department of Internal Medicine 1, University Medical Center Ulm, Albert-Einstein-Allee 23, 89081 Ulm, Germany; (E.R.); (J.G.); (F.A.); (A.K.B.); (T.S.)
| | - Alireza Abaei
- Center for Translational Imaging (MoMAN), Ulm University, 89081 Ulm, Germany; (A.A.); (V.R.)
| | - Thomas F. E. Barth
- Institute of Pathology, University Medical Center Ulm, 89081 Ulm, Germany;
| | - Volker Rasche
- Center for Translational Imaging (MoMAN), Ulm University, 89081 Ulm, Germany; (A.A.); (V.R.)
| | - Thomas Seufferlein
- Department of Internal Medicine 1, University Medical Center Ulm, Albert-Einstein-Allee 23, 89081 Ulm, Germany; (E.R.); (J.G.); (F.A.); (A.K.B.); (T.S.)
| | - Lukas Perkhofer
- Department of Internal Medicine 1, University Medical Center Ulm, Albert-Einstein-Allee 23, 89081 Ulm, Germany; (E.R.); (J.G.); (F.A.); (A.K.B.); (T.S.)
- Correspondence: (L.P.); (A.K.); Tel.: +49-731-500 44769 (L.P.); +49-731-500 44728 (A.K.)
| | - Alexander Kleger
- Department of Internal Medicine 1, University Medical Center Ulm, Albert-Einstein-Allee 23, 89081 Ulm, Germany; (E.R.); (J.G.); (F.A.); (A.K.B.); (T.S.)
- Correspondence: (L.P.); (A.K.); Tel.: +49-731-500 44769 (L.P.); +49-731-500 44728 (A.K.)
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11
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Kaur H, Salles DC, Murali S, Hicks JL, Nguyen M, Pritchard CC, De Marzo AM, Lanchbury JS, Trock BJ, Isaacs WB, Timms KM, Antonarakis ES, Lotan TL. Genomic and Clinicopathologic Characterization of ATM-deficient Prostate Cancer. Clin Cancer Res 2020; 26:4869-4881. [PMID: 32694154 PMCID: PMC7501149 DOI: 10.1158/1078-0432.ccr-20-0764] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 05/28/2020] [Accepted: 07/15/2020] [Indexed: 01/06/2023]
Abstract
PURPOSE The ATM (ataxia telangiectasia mutated) gene is mutated in a subset of prostate cancers, and ATM mutation may confer specific therapeutic vulnerabilities, although ATM-deficient prostate cancers have not been well-characterized. EXPERIMENTAL DESIGN We genetically validated a clinical grade IHC assay to detect ATM protein loss and examined the frequency of ATM loss among tumors with pathogenic germline ATM mutations and genetically unselected primary prostate carcinomas using tissue microarrays (TMAs). Immunostaining results were correlated with targeted somatic genomic sequencing and clinical outcomes. RESULTS ATM protein loss was found in 13% (7/52) of primary Gleason pattern 5 cancers with available sequencing data and was 100% sensitive for biallelic ATM inactivation. In a separate cohort with pathogenic germline ATM mutations, 74% (14/19) had ATM protein loss of which 70% (7/10) of evaluable cases had genomic evidence of biallelic inactivation, compared with zero of four of cases with intact ATM expression. By TMA screening, ATM loss was identified in 3% (25/831) of evaluable primary tumors, more commonly in grade group 5 (17/181; 9%) compared with all other grades (8/650; 1%; P < 0.0001). Of those with available sequencing, 80% (4/5) with homogeneous ATM protein loss and 50% (6/12) with heterogeneous ATM protein loss had detectable pathogenic ATM alterations. In surgically treated patients, ATM loss was not significantly associated with clinical outcomes in random-effects Cox models after adjusting for clinicopathologic variables. CONCLUSIONS ATM loss is enriched among high-grade prostate cancers. Optimal evaluation of ATM status requires both genomic and IHC studies and will guide development of molecularly targeted therapies.
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Affiliation(s)
- Harsimar Kaur
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, Maryland
| | - Daniela C Salles
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, Maryland
| | - Sanjana Murali
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, Maryland
| | - Jessica L Hicks
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, Maryland
| | | | - Colin C Pritchard
- Department of Laboratory Medicine, University of Washington, Seattle, Washington
| | - Angelo M De Marzo
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, Maryland
| | | | - Bruce J Trock
- Department of Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - William B Isaacs
- Department of Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | | | - Emmanuel S Antonarakis
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Tamara L Lotan
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, Maryland.
- Department of Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
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12
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Sunderland P, Augustyniak J, Lenart J, Bużańska L, Carlessi L, Delia D, Sikora E. ATM-deficient neural precursors develop senescence phenotype with disturbances in autophagy. Mech Ageing Dev 2020; 190:111296. [PMID: 32621937 DOI: 10.1016/j.mad.2020.111296] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 05/29/2020] [Accepted: 06/22/2020] [Indexed: 01/09/2023]
Abstract
ATM is a kinase involved in DNA damage response (DDR), regulation of response to oxidative stress, autophagy and mitophagy. Mutations in the ATM gene in humans result in ataxi A-Telangiectasia disease (A-T) characterized by a variety of symptoms with neurodegeneration and premature ageing among them. Since brain is one of the most affected organs in A-T, we have focused on senescence of neural progenitor cells (NPCs) derived from A-T reprogrammed fibroblasts. Accordingly, A-T NPCs obtained through neural differentiation of iPSCs in 5% oxygen possessed some features of senescence including increased activity of SA-β-gal and secretion of IL6 and IL8 in comparison to control NPCs. This phenotype of A-T NPC was accompanied by elevated oxidative stress. A-T NPCs exhibited symptoms of impaired autophagy and mitophagy with lack of response to chloroquine treatment. Additional sources of oxidative stress like increased oxygen concentration (20 %) and H2O2 respectively aggravated the phenotype of senescence and additionally disturbed the process of mitophagy. In both cases only A-T NPCs reacted to the treatment. We conclude that oxidative stress may be responsible for the phenotype of senescence and impairment of autophagy in A-T NPCs. Our results point to senescent A-T cells as a potential therapeutic target in this disease.
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Affiliation(s)
- Piotr Sunderland
- Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland.
| | - Justyna Augustyniak
- Mossakowski Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland
| | - Jacek Lenart
- Mossakowski Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland
| | - Leonora Bużańska
- Mossakowski Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland
| | - Luigi Carlessi
- Department of Research, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy
| | - Domenico Delia
- Department of Research, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy; IFOM, FIRC Institute of Molecular Oncology, Milano, Italy
| | - Ewa Sikora
- Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland.
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13
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Lloyd RL, Wijnhoven PWG, Ramos-Montoya A, Wilson Z, Illuzzi G, Falenta K, Jones GN, James N, Chabbert CD, Stott J, Dean E, Lau A, Young LA. Combined PARP and ATR inhibition potentiates genome instability and cell death in ATM-deficient cancer cells. Oncogene 2020; 39:4869-4883. [PMID: 32444694 PMCID: PMC7299845 DOI: 10.1038/s41388-020-1328-y] [Citation(s) in RCA: 97] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 05/01/2020] [Accepted: 05/07/2020] [Indexed: 12/11/2022]
Abstract
The poly (ADP-ribose) polymerase (PARP) inhibitor olaparib is FDA approved for the treatment of BRCA-mutated breast, ovarian and pancreatic cancers. Olaparib inhibits PARP1/2 enzymatic activity and traps PARP1 on DNA at single-strand breaks, leading to replication-induced DNA damage that requires BRCA1/2-dependent homologous recombination repair. Moreover, DNA damage response pathways mediated by the ataxia-telangiectasia mutated (ATM) and ataxia-telangiectasia mutated and Rad3-related (ATR) kinases are hypothesised to be important survival pathways in response to PARP-inhibitor treatment. Here, we show that olaparib combines synergistically with the ATR-inhibitor AZD6738 (ceralasertib), in vitro, leading to selective cell death in ATM-deficient cells. We observe that 24 h olaparib treatment causes cells to accumulate in G2-M of the cell cycle, however, co-administration with AZD6738 releases the olaparib-treated cells from G2 arrest. Selectively in ATM-knockout cells, we show that combined olaparib/AZD6738 treatment induces more chromosomal aberrations and achieves this at lower concentrations and earlier treatment time-points than either monotherapy. Furthermore, single-agent olaparib efficacy in vitro requires PARP inhibition throughout multiple rounds of replication. Here, we demonstrate in several ATM-deficient cell lines that the olaparib and AZD6738 combination induces cell death within 1-2 cell divisions, suggesting that combined treatment could circumvent the need for prolonged drug exposure. Finally, we demonstrate in vivo combination activity of olaparib and AZD6738 in xenograft and PDX mouse models with complete ATM loss. Collectively, these data provide a mechanistic understanding of combined PARP and ATR inhibition in ATM-deficient models, and support the clinical development of AZD6738 in combination with olaparib.
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Affiliation(s)
- Rebecca L Lloyd
- Bioscience, Oncology R&D, AstraZeneca, Cambridge, UK
- The Wellcome trust and CRUK Gurdon Institute, and Department of Biochemistry, University of Cambridge, Cambridge, UK
| | | | | | - Zena Wilson
- Bioscience, Oncology R&D, AstraZeneca, Alderley Park, UK
| | | | | | - Gemma N Jones
- Translational Medicine, Oncology R&D, AstraZeneca, Cambridge, UK
| | - Neil James
- Bioscience, Oncology R&D, AstraZeneca, Alderley Park, UK
| | | | - Jonathan Stott
- Quantitative Biology, Discovery Science, Oncology R&D, AstraZeneca, Cambridge, UK
| | - Emma Dean
- Research and Early Development, Oncology R&D, AstraZeneca, Cambridge, UK
| | - Alan Lau
- Bioscience, Oncology R&D, AstraZeneca, Cambridge, UK
| | - Lucy A Young
- Bioscience, Oncology R&D, AstraZeneca, Cambridge, UK.
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14
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Zhao J, Nguyen LNT, Nguyen LN, Dang X, Cao D, Khanal S, Schank M, Thakuri BKC, Ogbu SC, Morrison ZD, Wu XY, Li Z, Zou Y, El Gazzar M, Ning S, Wang L, Moorman JP, Yao ZQ. ATM Deficiency Accelerates DNA Damage, Telomere Erosion, and Premature T Cell Aging in HIV-Infected Individuals on Antiretroviral Therapy. Front Immunol 2019; 10:2531. [PMID: 31781094 PMCID: PMC6856652 DOI: 10.3389/fimmu.2019.02531] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Accepted: 10/11/2019] [Indexed: 12/27/2022] Open
Abstract
HIV infection leads to a phenomenon of inflammaging, in which chronic inflammation induces an immune aged phenotype, even in individuals on combined antiretroviral therapy (cART) with undetectable viremia. In this study, we investigated T cell homeostasis and telomeric DNA damage and repair machineries in cART-controlled HIV patients at risk for inflammaging. We found a significant depletion of CD4 T cells, which was inversely correlated with the cell apoptosis in virus-suppressed HIV subjects compared to age-matched healthy subjects (HS). In addition, HIV CD4 T cells were prone to DNA damage that extended to chromosome ends-telomeres, leading to accelerated telomere erosion-a hallmark of cell senescence. Mechanistically, the DNA double-strand break (DSB) sensors MRE11, RAD50, and NBS1 (MRN complex) remained intact, but both expression and activity of the DNA damage checkpoint kinase ataxia-telangiectasia mutated (ATM) and its downstream checkpoint kinase 2 (CHK2) were significantly suppressed in HIV CD4 T cells. Consistently, ATM/CHK2 activation, DNA repair, and cellular functions were also impaired in healthy CD4 T cells following ATM knockdown or exposure to the ATM inhibitor KU60019 in vitro, recapitulating the biological effects observed in HIV-derived CD4 T cells in vivo. Importantly, ectopic expression of ATM was essential and sufficient to reduce the DNA damage, apoptosis, and cellular dysfunction in HIV-derived CD4 T cells. These results demonstrate that failure of DSB repair due to ATM deficiency leads to increased DNA damage and renders CD4 T cells prone to senescence and apoptotic death, contributing to CD4 T cell depletion or dysfunction in cART-controlled, latent HIV infection.
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Affiliation(s)
- Juan Zhao
- Center of Excellence in Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
- Division of Infectious, Inflammatory and Immunologic Diseases, Department of Internal Medicine, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
| | - Lam Ngoc Thao Nguyen
- Center of Excellence in Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
- Division of Infectious, Inflammatory and Immunologic Diseases, Department of Internal Medicine, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
| | - Lam Nhat Nguyen
- Center of Excellence in Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
- Division of Infectious, Inflammatory and Immunologic Diseases, Department of Internal Medicine, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
| | - Xindi Dang
- Center of Excellence in Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
- Division of Infectious, Inflammatory and Immunologic Diseases, Department of Internal Medicine, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
| | - Dechao Cao
- Center of Excellence in Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
- Division of Infectious, Inflammatory and Immunologic Diseases, Department of Internal Medicine, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
| | - Sushant Khanal
- Center of Excellence in Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
- Division of Infectious, Inflammatory and Immunologic Diseases, Department of Internal Medicine, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
| | - Madison Schank
- Center of Excellence in Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
- Division of Infectious, Inflammatory and Immunologic Diseases, Department of Internal Medicine, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
| | - Bal Krishna Chand Thakuri
- Center of Excellence in Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
- Division of Infectious, Inflammatory and Immunologic Diseases, Department of Internal Medicine, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
| | - Stella C. Ogbu
- Center of Excellence in Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
- Division of Infectious, Inflammatory and Immunologic Diseases, Department of Internal Medicine, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
| | - Zheng D. Morrison
- Center of Excellence in Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
- Division of Infectious, Inflammatory and Immunologic Diseases, Department of Internal Medicine, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
| | - Xiao Y. Wu
- Center of Excellence in Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
- Division of Infectious, Inflammatory and Immunologic Diseases, Department of Internal Medicine, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
| | - Zhengke Li
- Center of Excellence in Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
- Division of Infectious, Inflammatory and Immunologic Diseases, Department of Internal Medicine, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
| | - Yue Zou
- Center of Excellence in Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
| | - Mohamed El Gazzar
- Center of Excellence in Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
| | - Shunbin Ning
- Center of Excellence in Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
- Division of Infectious, Inflammatory and Immunologic Diseases, Department of Internal Medicine, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
| | - Ling Wang
- Center of Excellence in Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
- Division of Infectious, Inflammatory and Immunologic Diseases, Department of Internal Medicine, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
| | - Jonathan P. Moorman
- Center of Excellence in Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
- Division of Infectious, Inflammatory and Immunologic Diseases, Department of Internal Medicine, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
- Hepatitis (HCV/HBV/HIV) Program, James H. Quillen VA Medical Center, Department of Veterans Affairs, Johnson City, TN, United States
| | - Zhi Q. Yao
- Center of Excellence in Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
- Division of Infectious, Inflammatory and Immunologic Diseases, Department of Internal Medicine, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
- Hepatitis (HCV/HBV/HIV) Program, James H. Quillen VA Medical Center, Department of Veterans Affairs, Johnson City, TN, United States
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15
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Yin S, Gambe RG, Sun J, Martinez AZ, Cartun ZJ, Regis FFD, Wan Y, Fan J, Brooks AN, Herman SEM, Ten Hacken E, Taylor-Weiner A, Rassenti LZ, Ghia EM, Kipps TJ, Obeng EA, Cibulskis CL, Neuberg D, Campagna DR, Fleming MD, Ebert BL, Wiestner A, Leshchiner I, DeCaprio JA, Getz G, Reed R, Carrasco RD, Wu CJ, Wang L. A Murine Model of Chronic Lymphocytic Leukemia Based on B Cell-Restricted Expression of Sf3b1 Mutation and Atm Deletion. Cancer Cell 2019; 35:283-296.e5. [PMID: 30712845 PMCID: PMC6372356 DOI: 10.1016/j.ccell.2018.12.013] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 10/24/2018] [Accepted: 12/28/2018] [Indexed: 12/26/2022]
Abstract
SF3B1 is recurrently mutated in chronic lymphocytic leukemia (CLL), but its role in the pathogenesis of CLL remains elusive. Here, we show that conditional expression of Sf3b1-K700E mutation in mouse B cells disrupts pre-mRNA splicing, alters cell development, and induces a state of cellular senescence. Combination with Atm deletion leads to the overcoming of cellular senescence and the development of CLL-like disease in elderly mice. These CLL-like cells show genome instability and dysregulation of multiple CLL-associated cellular processes, including deregulated B cell receptor signaling, which we also identified in human CLL cases. Notably, human CLLs harboring SF3B1 mutations exhibit altered response to BTK inhibition. Our murine model of CLL thus provides insights into human CLL disease mechanisms and treatment.
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MESH Headings
- Adenine/analogs & derivatives
- Agammaglobulinaemia Tyrosine Kinase/antagonists & inhibitors
- Agammaglobulinaemia Tyrosine Kinase/metabolism
- Alternative Splicing
- Animals
- Antineoplastic Agents/pharmacology
- Ataxia Telangiectasia Mutated Proteins/deficiency
- Ataxia Telangiectasia Mutated Proteins/genetics
- Ataxia Telangiectasia Mutated Proteins/metabolism
- B-Lymphocytes/drug effects
- B-Lymphocytes/immunology
- B-Lymphocytes/metabolism
- Cellular Senescence/drug effects
- DNA Damage
- Gene Deletion
- Genetic Predisposition to Disease
- Genomic Instability
- Humans
- Leukemia, Lymphocytic, Chronic, B-Cell/drug therapy
- Leukemia, Lymphocytic, Chronic, B-Cell/genetics
- Leukemia, Lymphocytic, Chronic, B-Cell/immunology
- Leukemia, Lymphocytic, Chronic, B-Cell/metabolism
- Mice, 129 Strain
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, Mutant Strains
- Mutation
- Neoplasms, Experimental/drug therapy
- Neoplasms, Experimental/genetics
- Neoplasms, Experimental/immunology
- Neoplasms, Experimental/metabolism
- Phenotype
- Phosphoproteins/genetics
- Phosphoproteins/metabolism
- Piperidines
- Protein Kinase Inhibitors/pharmacology
- Pyrazoles/pharmacology
- Pyrimidines/pharmacology
- RNA Splicing Factors/genetics
- RNA Splicing Factors/metabolism
- Receptors, Antigen, B-Cell/immunology
- Receptors, Antigen, B-Cell/metabolism
- Signal Transduction
- Tumor Cells, Cultured
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Affiliation(s)
- Shanye Yin
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA; Department of Cell Biology, Harvard Medical School, Boston, MA, USA
| | - Rutendo G Gambe
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Jing Sun
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | | | - Zachary J Cartun
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Fara Faye D Regis
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Youzhong Wan
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Jean Fan
- Department of Biomedical Informatics, Harvard Medical School, Boston, MA, USA
| | | | - Sarah E M Herman
- Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Elisa Ten Hacken
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | | | - Laura Z Rassenti
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
| | - Emanuela M Ghia
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
| | - Thomas J Kipps
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
| | | | | | - Donna Neuberg
- Biostatistics and Computational Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Dean R Campagna
- Department of Pathology, Boston Children's Hospital, Boston, MA, USA
| | - Mark D Fleming
- Department of Pathology, Boston Children's Hospital, Boston, MA, USA
| | - Benjamin L Ebert
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA; Department of Medicine, Brigham and Women's Hospital, Boston, MA, USA
| | - Adrian Wiestner
- Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | | | - James A DeCaprio
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Gad Getz
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Robin Reed
- Department of Cell Biology, Harvard Medical School, Boston, MA, USA
| | - Ruben D Carrasco
- Department of Medicine, Brigham and Women's Hospital, Boston, MA, USA; Department of Oncologic Pathology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Catherine J Wu
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA; Department of Medicine, Brigham and Women's Hospital, Boston, MA, USA.
| | - Lili Wang
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA; Department of Systems Biology, Beckman Research Institute, City of Hope, Monrovia, CA, USA.
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16
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Xu L, Ma E, Zeng T, Zhao R, Tao Y, Chen X, Groth J, Liang C, Hu H, Huang J. ATM deficiency promotes progression of CRPC by enhancing Warburg effect. Endocr Relat Cancer 2019; 26:59-71. [PMID: 30400006 PMCID: PMC6226046 DOI: 10.1530/erc-18-0196] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 08/07/2018] [Indexed: 12/16/2022]
Abstract
ATM is a well-known master regulator of double strand break (DSB) DNA repair and the defective DNA repair has been therapeutically exploited to develop PARP inhibitors based on the synthetic lethality strategy. ATM mutation is found with increased prevalence in advanced metastatic castration-resistant prostate cancer (mCRPC). However, the molecular mechanisms underlying ATM mutation-driving disease progression are still largely unknown. Here, we report that ATM mutation contributes to the CRPC progression through a metabolic rather than DNA repair mechanism. We showed that ATM deficiency generated by CRISPR/Cas9 editing promoted CRPC cell proliferation and xenograft tumor growth. ATM deficiency altered cellular metabolism and enhanced Warburg effect in CRPC cells. We demonstrated that ATM deficiency shunted the glucose flux to aerobic glycolysis by upregulating LDHA expression, which generated more lactate and produced less mitochondrial ROS to promote CRPC cell growth. Inhibition of LDHA by siRNA or inhibitor FX11 generated less lactate and accumulated more ROS in ATM-deficient CRPC cells and therefore potentiated the cell death of ATM-deficient CRPC cells. These findings suggest a new therapeutic strategy for ATM-mutant CRPC patients by targeting LDHA-mediated glycolysis metabolism, which might be effective for the PARP inhibitor resistant mCRPC tumors.
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Affiliation(s)
- Lingfan Xu
- Department of Urology, the First Affiliated Hospital of Anhui Medical University, Hefei, China, 230022
- Department of Pathology, Duke University School of Medicine, Durham, NC, USA, 27710
| | - Enze Ma
- Depaertment of Neuroscience, Duke University, Durham, NC, USA, 27710
| | - Tao Zeng
- Department of Pathology, Duke University School of Medicine, Durham, NC, USA, 27710
- Department of Urology, Jiangxi Province People’s Hospital, Nanchang, China
| | - Ruya Zhao
- Department of Dermatology, Duke School of Medicine, Durham, NC, USA, 27710
| | - Yulei Tao
- Department of Pathology, Duke University School of Medicine, Durham, NC, USA, 27710
| | - Xufeng Chen
- Department of Pathology, Duke University School of Medicine, Durham, NC, USA, 27710
| | - Jeff Groth
- Department of Pathology, Duke University School of Medicine, Durham, NC, USA, 27710
| | - Chaozhao Liang
- Department of Urology, the First Affiliated Hospital of Anhui Medical University, Hefei, China, 230022
- corresponding author: Hailiang Hu, Ph.D. , Department of Pathology, Duke University School of Medicine, DUMC box 103864, 905 S. Lasalle Street, Durham, NC 27710., Chaozhao Liang, M.D., Ph.D. , Department of Urology, the First Affiliated Hospital of Anhui Medical University, Hefei, China, 230022, Jiaoti Huang, M.D., Ph.D. , Department of Pathology, Duke University School of Medicine, Room 301M, Duke South, 40 Duke Medicine Circle, DUMC 3712, Durham, NC 27710
| | - Hailiang Hu
- Department of Pathology, Duke University School of Medicine, Durham, NC, USA, 27710
- Duke Cancer Institute, Duke University School of Medicine, Durham, NC, USA, 27710
- corresponding author: Hailiang Hu, Ph.D. , Department of Pathology, Duke University School of Medicine, DUMC box 103864, 905 S. Lasalle Street, Durham, NC 27710., Chaozhao Liang, M.D., Ph.D. , Department of Urology, the First Affiliated Hospital of Anhui Medical University, Hefei, China, 230022, Jiaoti Huang, M.D., Ph.D. , Department of Pathology, Duke University School of Medicine, Room 301M, Duke South, 40 Duke Medicine Circle, DUMC 3712, Durham, NC 27710
| | - Jiaoti Huang
- Department of Pathology, Duke University School of Medicine, Durham, NC, USA, 27710
- Duke Cancer Institute, Duke University School of Medicine, Durham, NC, USA, 27710
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC, USA, 27710
- corresponding author: Hailiang Hu, Ph.D. , Department of Pathology, Duke University School of Medicine, DUMC box 103864, 905 S. Lasalle Street, Durham, NC 27710., Chaozhao Liang, M.D., Ph.D. , Department of Urology, the First Affiliated Hospital of Anhui Medical University, Hefei, China, 230022, Jiaoti Huang, M.D., Ph.D. , Department of Pathology, Duke University School of Medicine, Room 301M, Duke South, 40 Duke Medicine Circle, DUMC 3712, Durham, NC 27710
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Hui CW, Song X, Ma F, Shen X, Herrup K. Ibuprofen prevents progression of ataxia telangiectasia symptoms in ATM-deficient mice. J Neuroinflammation 2018; 15:308. [PMID: 30400801 PMCID: PMC6220455 DOI: 10.1186/s12974-018-1338-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2018] [Accepted: 10/18/2018] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Inflammation plays a critical role in accelerating the progression of neurodegenerative diseases, such as Alzheimer's disease (AD) and ataxia telangiectasia (A-T). In A-T mouse models, LPS-induced neuroinflammation advances the degenerative changes found in cerebellar Purkinje neurons both in vivo and in vitro. In the current study, we ask whether ibuprofen, a non-steroidal anti-inflammatory drug (NSAID), can have the opposite effect and delay the symptoms of the disease. METHODS We tested the beneficial effects of ibuprofen in both in vitro and in vivo models. Conditioned medium from LPS stimulated primary microglia (LM) applied to cultures of dissociated cortical neurons leads to numerous degenerative changes. Pretreatment of the neurons with ibuprofen, however, blocked this damage. Systemic injection of LPS into either adult wild-type or adult Atm-/- mice produced an immune challenge that triggered profound behavioral, biochemical, and histological effects. We used a 2-week ibuprofen pretreatment regimen to investigate whether these LPS effects could be blocked. We also treated young presymptomatic Atm-/- mice to determine if ibuprofen could delay the appearance of symptoms. RESULTS Adding ibuprofen directly to neuronal cultures significantly reduced LM-induced degeneration. Curiously, adding ibuprofen to the microglia cultures before the LPS challenge had little effect, thus implying a direct effect of the NSAID on the neuronal cultures. In vivo administration of ibuprofen to Atm-/- animals before a systemic LPS immune challenge suppressed cytological damage. The ibuprofen effects were widespread as microglial activation, p38 phosphorylation, DNA damage, and neuronal cell cycle reentry were all reduced. Unfortunately, ibuprofen only slightly improved the LPS-induced behavioral deficits. Yet, while the behavioral symptoms could not be reversed once they were established in adult Atm-/- animals, administration of ibuprofen to young mutant pups prevented their symptoms from appearing. CONCLUSION Inflammatory processes impact the normal progression of A-T implying that modulation of the immune system can have therapeutic benefit for both the behavioral and cellular symptoms of this neurodegenerative disease.
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Affiliation(s)
- Chin Wai Hui
- Division of Life Science and State Key Laboratory of Molecular Neurobiology, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Xuan Song
- Division of Life Science and State Key Laboratory of Molecular Neurobiology, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Fulin Ma
- Division of Life Science and State Key Laboratory of Molecular Neurobiology, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Xuting Shen
- Division of Life Science and State Key Laboratory of Molecular Neurobiology, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
- Present address: School of Biomedical Sciences, The University of Hong Kong, Pokfulam, Hong Kong
| | - Karl Herrup
- Division of Life Science and State Key Laboratory of Molecular Neurobiology, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
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Tal E, Alfo M, Zha S, Barzilai A, De Zeeuw CI, Ziv Y, Shiloh Y. Inactive Atm abrogates DSB repair in mouse cerebellum more than does Atm loss, without causing a neurological phenotype. DNA Repair (Amst) 2018; 72:10-17. [PMID: 30348496 DOI: 10.1016/j.dnarep.2018.10.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Revised: 09/22/2018] [Accepted: 10/04/2018] [Indexed: 12/11/2022]
Abstract
The genome instability syndrome, ataxia-telangiectasia (A-T) is caused by null mutations in the ATM gene, that lead to complete loss or inactivation of the gene's product, the ATM protein kinase. ATM is the primary mobilizer of the cellular response to DNA double-strand breaks (DSBs) - a broad signaling network in which many components are ATM targets. The major clinical feature of A-T is cerebellar atrophy, characterized by relentless loss of Purkinje and granule cells. In Atm-knockout (Atm-KO) mice, complete loss of Atm leads to a very mild neurological phenotype, suggesting that Atm loss is not sufficient to markedly abrogate cerebellar structure and function in this organism. Expression of inactive ("kinase-dead") Atm (AtmKD) in mice leads to embryonic lethality, raising the question of whether conditional expression of AtmKD in the murine nervous system would lead to a more pronounced neurological phenotype than Atm loss. We generated two mouse strains in which AtmKD was conditionally expressed as the sole Atm species: one in the CNS and one specifically in Purkinje cells. Focusing our analysis on Purkinje cells, the dynamics of DSB readouts indicated that DSB repair was delayed longer in the presence of AtmKD compared to Atm loss. However, both strains exhibited normal life span and displayed no gross cerebellar histological abnormalities or significant neurological phenotype. We conclude that the presence of AtmKD is indeed more harmful to DSB repair than Atm loss, but the murine central nervous system can reasonably tolerate the extent of this DSB repair impairment. Greater pressure needs to be exerted on genome stability to obtain a mouse model that recapitulates the severe A-T neurological phenotype.
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Affiliation(s)
- Efrat Tal
- The David and Inez Myers Laboratory for Cancer Research, Department of Human Molecular Genetics and Biochemistry, Sackler School of Medicine, New York, United States
| | - Marina Alfo
- The David and Inez Myers Laboratory for Cancer Research, Department of Human Molecular Genetics and Biochemistry, Sackler School of Medicine, New York, United States
| | - Shan Zha
- Institute for Cancer Genetics, Department of Pathology and Cell Biology, College of Physicians and Surgeons, Columbia University, New York, NY, United States
| | - Ari Barzilai
- Department of Neurobiology, George S. Wise Faculty of Life Sciences, and Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel
| | - Chris I De Zeeuw
- Department of Neuroscience, Erasmus Medical Center, Rotterdam, and the Royal Netherlands Academy of Art & Science, Amsterdam, Netherlands
| | - Yael Ziv
- The David and Inez Myers Laboratory for Cancer Research, Department of Human Molecular Genetics and Biochemistry, Sackler School of Medicine, New York, United States
| | - Yosef Shiloh
- The David and Inez Myers Laboratory for Cancer Research, Department of Human Molecular Genetics and Biochemistry, Sackler School of Medicine, New York, United States.
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Thrasher PR, Scofield SLC, Dalal S, Crawford CC, Singh M, Singh K. Ataxia telangiectasia mutated kinase deficiency impairs the autophagic response early during myocardial infarction. Am J Physiol Heart Circ Physiol 2018; 315:H48-H57. [PMID: 29652546 PMCID: PMC6087781 DOI: 10.1152/ajpheart.00042.2018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 03/29/2018] [Accepted: 04/09/2018] [Indexed: 12/19/2022]
Abstract
Ataxia telangiectasia mutated kinase (ATM) is activated in response to DNA damage. We have previously shown that ATM plays a critical role in myocyte apoptosis and cardiac remodeling after myocardial infarction (MI). Here, we tested the hypothesis that ATM deficiency results in autophagic impairment in the heart early during MI. MI was induced in wild-type (WT) and ATM heterozygous knockout (hKO) mice by ligation of the left anterior descending artery. Structural and biochemical parameters of the heart were measured 4 h after left anterior descending artery ligation. M-mode echocardiography revealed that MI worsens heart function, as evidenced by reduced percent ejection fraction and fractional shortening in both groups. However, MI-induced increase in left ventricular end-diastolic and end-systolic diameters and volumes were significantly lower in hKO hearts. ATM deficiency resulted in autophagic impairment during MI, as evidenced by decreased microtubule-associated protein light chain 3-II increased p62, decreased cathepsin D protein levels, and increased aggresome accumulation. ERK1/2 activation was only observed in WT-MI hearts. Activation of Akt and AMP-activated protein kinase (AMPK) was lower, whereas activation of glycogen synthase kinase (GSK)-3β and mammalian target of rapamycin (mTOR) was higher in hKO-MI hearts. Inhibition of ATM using KU-55933 resulted in autophagic impairment in cardiac fibroblasts, as evidenced by decreased light chain 3-II protein levels and formation of acidic vesicular organelles. This impairment was associated with decreased activation of Akt and AMPK but enhanced activation of GSK-3β and mTOR in KU-55933-treated fibroblasts. Thus, ATM deficiency results in autophagic impairment in the heart during MI and cardiac fibroblasts. This autophagic impairment may occur via the activation of GSK-3β and mTOR and inactivation of Akt and AMPK. NEW & NOTEWORTHY Ataxia telangiectasia mutated kinase (ATM) plays a critical role in myocyte apoptosis and cardiac remodeling after myocardial infarction (MI). Here, we provide evidence that ATM deficiency results in autophagic impairment during MI. Further investigation of the role of ATM in autophagy post-MI may provide novel therapeutic targets for patients with ataxia telangiectasia suffering from heart disease.
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Affiliation(s)
- Patsy R Thrasher
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee
| | - Stephanie L C Scofield
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee
| | - Suman Dalal
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee
| | - Claire C Crawford
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee
| | - Mahipal Singh
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee
| | - Krishna Singh
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee
- Center for Inflammation, Infectious Disease, and Immunity, East Tennessee State University, Johnson City, Tennessee
- James H. Quillen Veterans Affairs Medical Center, Mountain Home, Tennessee
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20
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Abstract
Maintenance of genomic integrity is one of the critical features for proper neurodevelopment and inhibition of neurological diseases. The signals from both ATM and ATR to TP53 are well-known mechanisms to remove neural cells with DNA damage during neurogenesis. Here we examined the involvement of Atm and Atr in genomic instability due to Terf2 inactivation during mouse brain development. Selective inactivation of Terf2 in neural progenitors induced apoptosis, resulting in a complete loss of the brain structure. This neural loss was rescued partially in both Atm and Trp53 deficiency, but not in an Atr-deficient background in the mouse. Atm inactivation resulted in incomplete brain structures, whereas p53 deficiency led to the formation of multinucleated giant neural cells and the disruption of the brain structure. These giant neural cells disappeared in Lig4 deficiency. These data demonstrate ATM and TP53 are important for the maintenance of telomere homeostasis and the surveillance of telomere dysfunction during neurogenesis.
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Affiliation(s)
- Jusik Kim
- Genomic Instability Research Center, School of Medicine, Ajou University, Suwon, 16499, Republic of Korea
- Department of Biomedical Sciences, The Graduate School, Ajou University, Suwon, 16499, Republic of Korea
| | - Inseo Choi
- Genomic Instability Research Center, School of Medicine, Ajou University, Suwon, 16499, Republic of Korea
- Department of Biomedical Sciences, The Graduate School, Ajou University, Suwon, 16499, Republic of Korea
| | - Youngsoo Lee
- Genomic Instability Research Center, School of Medicine, Ajou University, Suwon, 16499, Republic of Korea.
- Department of Biomedical Sciences, The Graduate School, Ajou University, Suwon, 16499, Republic of Korea.
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21
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Min A, Im SA, Jang H, Kim S, Lee M, Kim DK, Yang Y, Kim HJ, Lee KH, Kim JW, Kim TY, Oh DY, Brown J, Lau A, O'Connor MJ, Bang YJ. AZD6738, A Novel Oral Inhibitor of ATR, Induces Synthetic Lethality with ATM Deficiency in Gastric Cancer Cells. Mol Cancer Ther 2017; 16:566-577. [PMID: 28138034 DOI: 10.1158/1535-7163.mct-16-0378] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 11/01/2016] [Accepted: 12/08/2016] [Indexed: 11/16/2022]
Abstract
Ataxia telangiectasia and Rad3-related (ATR) can be considered an attractive target for cancer treatment due to its deleterious effect on cancer cells harboring a homologous recombination defect. The aim of this study was to investigate the potential use of the ATR inhibitor, AZD6738, to treat gastric cancer.In SNU-601 cells with dysfunctional ATM, AZD6738 treatment led to an accumulation of DNA damage due to dysfunctional RAD51 foci formation, S phase arrest, and caspase 3-dependent apoptosis. In contrast, SNU-484 cells with functional ATM were not sensitive to AZD6738. Inhibition of ATM in SNU-484 cells enhanced AZD6738 sensitivity to a level comparable with that observed in SNU-601 cells, showing that activation of the ATM-Chk2 signaling pathway attenuates AZD6738 sensitivity. In addition, decreased HDAC1 expression was found to be associated with ATM inactivation in SNU-601 cells, demonstrating the interaction between HDAC1 and ATM can affect sensitivity to AZD6738. Furthermore, in an in vivo tumor xenograft mouse model, AZD6738 significantly suppressed tumor growth and increased apoptosis.These findings suggest synthetic lethality between ATR inhibition and ATM deficiency in gastric cancer cells. Further clinical studies on the interaction between AZD 6738 and ATM deficiency are warranted to develop novel treatment strategies for gastric cancer. Mol Cancer Ther; 16(4); 566-77. ©2017 AACR.
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Affiliation(s)
- Ahrum Min
- Cancer Research Institute, Seoul National University, Seoul, Korea
- Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea
| | - Seock-Ah Im
- Cancer Research Institute, Seoul National University, Seoul, Korea.
- Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Hyemin Jang
- Cancer Research Institute, Seoul National University, Seoul, Korea
| | - Seongyeong Kim
- Cancer Research Institute, Seoul National University, Seoul, Korea
| | - Miso Lee
- Cancer Research Institute, Seoul National University, Seoul, Korea
| | | | - Yaewon Yang
- Cancer Research Institute, Seoul National University, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Hee-Jun Kim
- Cancer Research Institute, Seoul National University, Seoul, Korea
- Department of Internal Medicine, Chung Ang University College of Medicine, Seoul, Korea
| | - Kyung-Hun Lee
- Cancer Research Institute, Seoul National University, Seoul, Korea
- Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Jin Won Kim
- Cancer Research Institute, Seoul National University, Seoul, Korea
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Tae-Yong Kim
- Cancer Research Institute, Seoul National University, Seoul, Korea
- Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Do-Youn Oh
- Cancer Research Institute, Seoul National University, Seoul, Korea
- Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Jeff Brown
- AstraZeneca R&D Boston, Waltham, Massachusetts
| | - Alan Lau
- AstraZeneca UK Ltd., Macclesfield, Cheshire, United Kingdom
| | | | - Yung-Jue Bang
- Cancer Research Institute, Seoul National University, Seoul, Korea
- Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
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Barazzuol L, Jeggo PA. In vivo sensitivity of the embryonic and adult neural stem cell compartments to low-dose radiation. J Radiat Res 2016; 57 Suppl 1:i2-i10. [PMID: 27125639 PMCID: PMC4990107 DOI: 10.1093/jrr/rrw013] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 01/12/2016] [Accepted: 01/17/2016] [Indexed: 05/26/2023]
Abstract
The embryonic brain is radiation-sensitive, with cognitive deficits being observed after exposure to low radiation doses. Exposure of neonates to radiation can cause intracranial carcinogenesis. To gain insight into the basis underlying these outcomes, we examined the response of the embryonic, neonatal and adult brain to low-dose radiation, focusing on the neural stem cell compartments. This review summarizes our recent findings. At E13.5-14.5 the embryonic neocortex encompasses rapidly proliferating stem and progenitor cells. Exploiting mice with a hypomorphic mutation in DNA ligase IV (Lig4(Y288C) ), we found a high level of DNA double-strand breaks (DSBs) at E14.5, which we attribute to the rapid proliferation. We observed endogenous apoptosis in Lig4(Y288C) embryos and in WT embryos following exposure to low radiation doses. An examination of DSB levels and apoptosis in adult neural stem cell compartments, the subventricular zone (SVZ) and the subgranular zone (SGZ) revealed low DSB levels in Lig4(Y288C) mice, comparable with the levels in differentiated neuronal tissues. We conclude that the adult SVZ does not incur high levels of DNA breakage, but sensitively activates apoptosis; apoptosis was less sensitively activated in the SGZ, and differentiated neuronal tissues did not activate apoptosis. P5/P15 mice showed intermediate DSB levels, suggesting that DSBs generated in the embryo can be transmitted to neonates and undergo slow repair. Interestingly, this analysis revealed a stage of high endogenous apoptosis in the neonatal SVZ. Collectively, these studies reveal that the adult neural stem cell compartment, like the embryonic counterpart, can sensitively activate apoptosis.
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Affiliation(s)
- Lara Barazzuol
- Genome Damage and Stability Centre, Life Sciences, University of Sussex, Brighton, East Sussex BN19RQ, UK
| | - Penny A Jeggo
- Genome Damage and Stability Centre, Life Sciences, University of Sussex, Brighton, East Sussex BN19RQ, UK
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Kaminsky N, Bihari O, Kanner S, Barzilai A. Connecting Malfunctioning Glial Cells and Brain Degenerative Disorders. Genomics Proteomics Bioinformatics 2016; 14:155-165. [PMID: 27245308 PMCID: PMC4936608 DOI: 10.1016/j.gpb.2016.04.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 04/21/2016] [Accepted: 04/22/2016] [Indexed: 12/19/2022]
Abstract
The DNA damage response (DDR) is a complex biological system activated by different types of DNA damage. Mutations in certain components of the DDR machinery can lead to genomic instability disorders that culminate in tissue degeneration, premature aging, and various types of cancers. Intriguingly, malfunctioning DDR plays a role in the etiology of late onset brain degenerative disorders such as Parkinson’s, Alzheimer’s, and Huntington’s diseases. For many years, brain degenerative disorders were thought to result from aberrant neural death. Here we discuss the evidence that supports our novel hypothesis that brain degenerative diseases involve dysfunction of glial cells (astrocytes, microglia, and oligodendrocytes). Impairment in the functionality of glial cells results in pathological neuro-glial interactions that, in turn, generate a “hostile” environment that impairs the functionality of neuronal cells. These events can lead to systematic neural demise on a scale that appears to be proportional to the severity of the neurological deficit.
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Affiliation(s)
- Natalie Kaminsky
- Department of Neurobiology, George S. Wise, Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Ofer Bihari
- Department of Neurobiology, George S. Wise, Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel; Sagol School of Neuroscience, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Sivan Kanner
- Department of Neurobiology, George S. Wise, Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel.
| | - Ari Barzilai
- Department of Neurobiology, George S. Wise, Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel; Sagol School of Neuroscience, Tel Aviv University, Tel Aviv 6997801, Israel.
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Bednarski JJ, Pandey R, Schulte E, White LS, Chen BR, Sandoval GJ, Kohyama M, Haldar M, Nickless A, Trott A, Cheng G, Murphy KM, Bassing CH, Payton JE, Sleckman BP. RAG-mediated DNA double-strand breaks activate a cell type-specific checkpoint to inhibit pre-B cell receptor signals. J Exp Med 2016; 213:209-23. [PMID: 26834154 PMCID: PMC4749927 DOI: 10.1084/jem.20151048] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 12/03/2015] [Indexed: 01/17/2023] Open
Abstract
DNA double-strand breaks (DSBs) activate a canonical DNA damage response, including highly conserved cell cycle checkpoint pathways that prevent cells with DSBs from progressing through the cell cycle. In developing B cells, pre-B cell receptor (pre-BCR) signals initiate immunoglobulin light (Igl) chain gene assembly, leading to RAG-mediated DNA DSBs. The pre-BCR also promotes cell cycle entry, which could cause aberrant DSB repair and genome instability in pre-B cells. Here, we show that RAG DSBs inhibit pre-BCR signals through the ATM- and NF-κB2-dependent induction of SPIC, a hematopoietic-specific transcriptional repressor. SPIC inhibits expression of the SYK tyrosine kinase and BLNK adaptor, resulting in suppression of pre-BCR signaling. This regulatory circuit prevents the pre-BCR from inducing additional Igl chain gene rearrangements and driving pre-B cells with RAG DSBs into cycle. We propose that pre-B cells toggle between pre-BCR signals and a RAG DSB-dependent checkpoint to maintain genome stability while iteratively assembling Igl chain genes.
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Affiliation(s)
- Jeffrey J Bednarski
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110
| | - Ruchi Pandey
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
| | - Emily Schulte
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110
| | - Lynn S White
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110
| | - Bo-Ruei Chen
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
| | - Gabriel J Sandoval
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
| | - Masako Kohyama
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
| | - Malay Haldar
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
| | - Andrew Nickless
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110
| | - Amanda Trott
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110
| | - Genhong Cheng
- Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, CA 90095
| | - Kenneth M Murphy
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
| | - Craig H Bassing
- Division of Cancer Pathobiology, Department of Pathology and Laboratory Medicine, Center for Childhood Cancer Research, Children's Hospital of Philadelphia, Philadelphia, PA 19104
| | - Jacqueline E Payton
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
| | - Barry P Sleckman
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
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Kulinski JM, Darrah EJ, Broniowska KA, Mboko WP, Mounce BC, Malherbe LP, Corbett JA, Gauld SB, Tarakanova VL. ATM facilitates mouse gammaherpesvirus reactivation from myeloid cells during chronic infection. Virology 2015; 483:264-74. [PMID: 26001649 PMCID: PMC4516584 DOI: 10.1016/j.virol.2015.04.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Revised: 03/22/2015] [Accepted: 04/30/2015] [Indexed: 12/28/2022]
Abstract
Gammaherpesviruses are cancer-associated pathogens that establish life-long infection in most adults. Insufficiency of Ataxia-Telangiectasia mutated (ATM) kinase leads to a poor control of chronic gammaherpesvirus infection via an unknown mechanism that likely involves a suboptimal antiviral response. In contrast to the phenotype in the intact host, ATM facilitates gammaherpesvirus reactivation and replication in vitro. We hypothesized that ATM mediates both pro- and antiviral activities to regulate chronic gammaherpesvirus infection in an immunocompetent host. To test the proposed proviral activity of ATM in vivo, we generated mice with ATM deficiency limited to myeloid cells. Myeloid-specific ATM deficiency attenuated gammaherpesvirus infection during the establishment of viral latency. The results of our study uncover a proviral role of ATM in the context of gammaherpesvirus infection in vivo and support a model where ATM combines pro- and antiviral functions to facilitate both gammaherpesvirus-specific T cell immune response and viral reactivation in vivo.
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Affiliation(s)
| | | | | | | | | | | | - John A Corbett
- Biochemistry, Medical College of Wisconsin, United States
| | - Stephen B Gauld
- Division of Allergy and Clinical Immunology, Department of Pediatrics, United States
| | - Vera L Tarakanova
- Microbiology and Molecular Genetics, United States; Cancer Center, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, United States.
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Ip LRH, Poulogiannis G, Viciano FC, Sasaki J, Kofuji S, Spanswick VJ, Hochhauser D, Hartley JA, Sasaki T, Gewinner CA. Loss of INPP4B causes a DNA repair defect through loss of BRCA1, ATM and ATR and can be targeted with PARP inhibitor treatment. Oncotarget 2015; 6:10548-62. [PMID: 25868852 PMCID: PMC4496374 DOI: 10.18632/oncotarget.3307] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Accepted: 02/08/2015] [Indexed: 12/18/2022] Open
Abstract
Treatment options for ovarian cancer patients remain limited and overall survival is less than 50% despite recent clinical advances. The lipid phosphatase inositol polyphosphate 4-phosphatase type II (INPP4B) has been described as a tumor suppressor in the PI3K/Akt pathway with loss of expression found most pronounced in breast, ovarian cancer and melanoma. Using microarray technology we identified a DNA repair defect in INPP4B-deficient cells, which we further characterized by comet assays and quantification of γH2AX, RAD51 and 53BP1 foci formation. INPP4B loss resulted in significantly increased sensitivity towards PARP inhibition, comparable to loss of BRCA1 in two- and three-dimensional in vitro models, as well as in in vivo xenograft models. Mechanistically, we discovered that INPP4B forms a protein complex with the key players of DNA repair, ATR and BRCA1, in GST pulldown and 293T overexpression assays, and INPP4B loss affects BRCA1, ATM and ATR protein stability resulting in the observed DNA repair defect. Given that INPP4B loss has been found in 40% of ovarian cancer patients, this study provides the rationale for establishing INPP4B as a biomarker of PARP inhibitor response, and consequently offers novel therapeutic options for a significant subset of patients. Loss of the tumor suppressor inositol polyphosphate 4-phosphatase type II (INPP4B) results in a DNA repair defect due to concomitant loss of BRCA1, ATR and ATM and can be therapeutically targeted with PARP inhibitors.
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Affiliation(s)
- Laura R H Ip
- Department of Cancer Biology, UCL Cancer Institute, University College London, London, UK
| | - George Poulogiannis
- The Institute of Cancer Research, Signalling and Cancer Metabolism, London, UK
| | - Felipe Cia Viciano
- Department of Cancer Biology, UCL Cancer Institute, University College London, London, UK
- Faculty of Infectious and Tropical Diseases, Immunology and Infection Department, London School of Hygiene & Tropical Diseases, London, UK
| | - Junko Sasaki
- Department of Medical Biology, Akita University School of Medicine, Akita, Japan
| | - Satoshi Kofuji
- Department of Medical Biology, Akita University School of Medicine, Akita, Japan
| | - Victoria J Spanswick
- Cancer Research UK Drug-DNA Interaction Research Group, UCL Cancer Institute, University College London, London, UK
| | - Daniel Hochhauser
- Cancer Research UK Drug-DNA Interaction Research Group, UCL Cancer Institute, University College London, London, UK
| | - John A Hartley
- Cancer Research UK Drug-DNA Interaction Research Group, UCL Cancer Institute, University College London, London, UK
| | - Takehiko Sasaki
- Department of Medical Biology, Akita University School of Medicine, Akita, Japan
| | - Christina A Gewinner
- Department of Cancer Biology, UCL Cancer Institute, University College London, London, UK
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Taylor AMR, Lam Z, Last JI, Byrd PJ. Ataxia telangiectasia: more variation at clinical and cellular levels. Clin Genet 2015; 87:199-208. [PMID: 25040471 DOI: 10.1111/cge.12453] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Revised: 06/06/2014] [Accepted: 06/30/2014] [Indexed: 01/02/2023]
Abstract
Ataxia telangiectasia (A-T) is a rare recessively inherited disorder resulting in a progressive neurological decline. It is caused by biallelic mutation of the ATM gene that encodes a 370 kDa serine/threonine protein kinase responsible for phosphorylating many target proteins. ATM is activated by auto(trans)phosphorylation in response to DNA double strand breaks and leads to the activation of cell cycle checkpoints and either DNA repair or apoptosis as part of the cellular response to DNA damage. The allelic heterogeneity in A-T is striking. While the majority of mutations are truncating, leading to instability and loss of the ATM protein from the allele, a significant proportion of patients carry one of a small number of mutations that are either missense or leaky splice site mutations resulting in retention of some ATM with activity. The allelic heterogeneity in ATM, therefore, results in an equally striking clinical heterogeneity. There is also locus heterogeneity because mutation of the MRE11 gene can cause an obvious A-T like disorder both clinically and also at the cellular level and mutation of the RNF168 gene results in a much milder clinical phenotype, neurologically, with the major clinical feature being an immunological defect.
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Affiliation(s)
- A M R Taylor
- School of Cancer Sciences, University of Birmingham, Birmingham, UK
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Abstract
SUMMARY In this issue of Cancer Discovery, AI-Ahmadie and colleagues identify a somatic mutation in the RAD50 gene as a likely contributing factor to an unusual curative response to systemic combination therapy employing the DNA-damaging agent irinotecan and a checkpoint kinase 1 inhibitor in a patient with recurrent, metastatic small-cell cancer. This study highlights the importance of in-depth analysis of exceptional responders to chemotherapy and targeted therapy in early-phase clinical trials and opens new avenues for developing cancer genome-based combination therapy to improve the efficacy of traditional chemotherapy through synthetically lethal interactions.
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Affiliation(s)
- Guang Peng
- Department of Clinical Cancer Prevention, The University of Texas MD Anderson Cancer Center, Houston, Texas.
| | - Scott E Woodman
- Department of Melanoma Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas. Department of Systems Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Gordon B Mills
- Department of Systems Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas
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Al-Ahmadie H, Iyer G, Hohl M, Asthana S, Inagaki A, Schultz N, Hanrahan AJ, Scott SN, Brannon AR, McDermott GC, Pirun M, Ostrovnaya I, Kim P, Socci ND, Viale A, Schwartz GK, Reuter V, Bochner BH, Rosenberg JE, Bajorin DF, Berger MF, Petrini JHJ, Solit DB, Taylor BS. Synthetic lethality in ATM-deficient RAD50-mutant tumors underlies outlier response to cancer therapy. Cancer Discov 2014; 4:1014-21. [PMID: 24934408 PMCID: PMC4155059 DOI: 10.1158/2159-8290.cd-14-0380] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
UNLABELLED Metastatic solid tumors are almost invariably fatal. Patients with disseminated small-cell cancers have a particularly unfavorable prognosis, with most succumbing to their disease within two years. Here, we report on the genetic and functional analysis of an outlier curative response of a patient with metastatic small-cell cancer to combined checkpoint kinase 1 (CHK1) inhibition and DNA-damaging chemotherapy. Whole-genome sequencing revealed a clonal hemizygous mutation in the Mre11 complex gene RAD50 that attenuated ATM signaling which in the context of CHK1 inhibition contributed, via synthetic lethality, to extreme sensitivity to irinotecan. As Mre11 mutations occur in a diversity of human tumors, the results suggest a tumor-specific combination therapy strategy in which checkpoint inhibition in combination with DNA-damaging chemotherapy is synthetically lethal in tumor cells but not normal cells with somatic mutations that impair Mre11 complex function. SIGNIFICANCE Strategies to effect deep and lasting responses to cancer therapy in patients with metastatic disease have remained difficult to attain, especially in early-phase clinical trials. Here, we present an in-depth genomic and functional genetic analysis identifying RAD50 hypomorphism as a contributing factor to a curative response to systemic combination therapy in a patient with recurrent, metastatic small-cell cancer.
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Affiliation(s)
- Hikmat Al-Ahmadie
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Gopa Iyer
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York. Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, New York. Department of Medicine, Weill Cornell Medical College, New York, New York
| | - Marcel Hohl
- Molecular Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Saurabh Asthana
- Department of Medicine, University of California, San Francisco, California. Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, California
| | - Akiko Inagaki
- Molecular Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Nikolaus Schultz
- Computational Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Aphrothiti J Hanrahan
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Sasinya N Scott
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - A Rose Brannon
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Gregory C McDermott
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Mono Pirun
- Bioinformatics Core Laboratory, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Irina Ostrovnaya
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Philip Kim
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, New York. Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Nicholas D Socci
- Bioinformatics Core Laboratory, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Agnes Viale
- Genomics Core Laboratory, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Gary K Schwartz
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Victor Reuter
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Bernard H Bochner
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Jonathan E Rosenberg
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York. Department of Medicine, Weill Cornell Medical College, New York, New York
| | - Dean F Bajorin
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York. Department of Medicine, Weill Cornell Medical College, New York, New York
| | - Michael F Berger
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York. Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, New York
| | - John H J Petrini
- Molecular Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York.
| | - David B Solit
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York. Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, New York. Department of Medicine, Weill Cornell Medical College, New York, New York.
| | - Barry S Taylor
- Department of Medicine, University of California, San Francisco, California. Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, California. Department of Epidemiology and Biostatistics, University of California, San Francisco, California.
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Abstract
Numerous in vitro studies have shown that human cell lines lacking functional ATM are extremely radiosensitive. In this issue, Moding et al. demonstrate using a murine model of sarcoma that deletion of the Atm gene has much less of a radiosensitizing effect on normal cardiac endothelia than on rapidly proliferating tumor endothelia. This work confounds our assumptions about the generality of the role of ATM in radiation sensitivity and the potential use of ATM inhibitors as radiosensitizers.
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Moding EJ, Lee CL, Castle KD, Oh P, Mao L, Zha S, Min HD, Ma Y, Das S, Kirsch DG. Atm deletion with dual recombinase technology preferentially radiosensitizes tumor endothelium. J Clin Invest 2014; 124:3325-38. [PMID: 25036710 DOI: 10.1172/jci73932] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Accepted: 05/15/2014] [Indexed: 02/06/2023] Open
Abstract
Cells isolated from patients with ataxia telangiectasia are exquisitely sensitive to ionizing radiation. Kinase inhibitors of ATM, the gene mutated in ataxia telangiectasia, can sensitize tumor cells to radiation therapy, but concern that inhibiting ATM in normal tissues will also increase normal tissue toxicity from radiation has limited their clinical application. Endothelial cell damage can contribute to the development of long-term side effects after radiation therapy, but the role of endothelial cell death in tumor response to radiation therapy remains controversial. Here, we developed dual recombinase technology using both FlpO and Cre recombinases to generate primary sarcomas in mice with endothelial cell-specific deletion of Atm to determine whether loss of Atm in endothelial cells sensitizes tumors and normal tissues to radiation. Although deletion of Atm in proliferating tumor endothelial cells enhanced the response of sarcomas to radiation, Atm deletion in quiescent endothelial cells of the heart did not sensitize mice to radiation-induced myocardial necrosis. Blocking cell cycle progression reversed the effect of Atm loss on tumor endothelial cell radiosensitivity. These results indicate that endothelial cells must progress through the cell cycle in order to be radiosensitized by Atm deletion.
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32
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Carlessi L, Poli EF, Bechi G, Mantegazza M, Pascucci B, Narciso L, Dogliotti E, Sala C, Verpelli C, Lecis D, Delia D. Functional and molecular defects of hiPSC-derived neurons from patients with ATM deficiency. Cell Death Dis 2014; 5:e1342. [PMID: 25032865 PMCID: PMC4123100 DOI: 10.1038/cddis.2014.310] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Revised: 05/30/2014] [Accepted: 06/16/2014] [Indexed: 11/21/2022]
Abstract
Loss of ataxia telangiectasia mutated (ATM) kinase, a key factor of the DNA damage response (DDR) pathway, causes the cancer predisposing and neurodegenerative syndrome ataxia-telangiectasia (A-T). To investigate the mechanisms of neurodegeneration, we have reprogrammed fibroblasts from ATM-null A-T patients and normal controls to pluripotency (human-induced pluripotent stem cells), and derived from these neural precursor cells able to terminally differentiate into post-mitotic neurons positive to >90% for β-tubulin III+/microtubule-associated protein 2+. We show that A-T neurons display similar voltage-gated potassium and sodium currents and discharges of action potentials as control neurons, but defective expression of the maturation and synaptic markers SCG10, SYP and PSD95 (postsynaptic density protein 95). A-T neurons exhibited defective repair of DNA double-strand breaks (DSBs) and repressed phosphorylation of ATM substrates (e.g., γH2AX, Smc1-S966, Kap1-S824, Chk2-T68, p53-S15), but normal repair of single-strand breaks, and normal short- and long-patch base excision repair activities. Moreover, A-T neurons were resistant to apoptosis induced by the genotoxic agents camptothecin and trabectedin, but as sensitive as controls to the oxidative agents. Most notably, A-T neurons exhibited abnormal accumulation of topoisomerase 1-DNA covalent complexes (Top1-ccs). These findings reveal that ATM deficiency impairs neuronal maturation, suppresses the response and repair of DNA DSBs, and enhances Top1-cc accumulation. Top1-cc could be a risk factor for neurodegeneration as they may interfere with transcription elongation and promote transcriptional decline.
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Affiliation(s)
- L Carlessi
- Department of Experimental Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Via Amadeo 42, 20133 Milano, Italy
| | - E Fusar Poli
- Department of Experimental Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Via Amadeo 42, 20133 Milano, Italy
| | - G Bechi
- Department of Neurophysiopathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Via Amadeo 42, 20133 Milano, Italy
| | - M Mantegazza
- Department of Neurophysiopathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Via Amadeo 42, 20133 Milano, Italy
- Institute of Molecular and Cellular Pharmacology (IPMC) CNRS UMR7275 and University of Nice-Sophia Antipolis, 660 Route des Lucioles, 06560 Valbonne, France
| | - B Pascucci
- CNR Institute of Crystallography, Via Salaria, Km. 29.300, 00016 Monterotondo Scalo, Roma, Italy
| | - L Narciso
- Department of Food Safety and Veterinary Public Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Roma, Italy
| | - E Dogliotti
- Department of Environment and Primary Prevention, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Roma, Italy
| | - C Sala
- CNR Institute of Neuroscience and Department of Biotechnology and Translational Medicine, Via Vanvitelli 32, 20129 Milano, Italy
| | - C Verpelli
- CNR Institute of Neuroscience and Department of Biotechnology and Translational Medicine, Via Vanvitelli 32, 20129 Milano, Italy
| | - D Lecis
- Department of Experimental Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Via Amadeo 42, 20133 Milano, Italy
| | - D Delia
- Department of Experimental Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Via Amadeo 42, 20133 Milano, Italy
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Foster CR, Daniel LL, Daniels CR, Dalal S, Singh M, Singh K. Deficiency of ataxia telangiectasia mutated kinase modulates cardiac remodeling following myocardial infarction: involvement in fibrosis and apoptosis. PLoS One 2013; 8:e83513. [PMID: 24358288 PMCID: PMC3865210 DOI: 10.1371/journal.pone.0083513] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 11/05/2013] [Indexed: 12/19/2022] Open
Abstract
Ataxia telangiectasia mutated kinase (ATM) is a cell cycle checkpoint protein activated in response to DNA damage. We recently reported that ATM plays a protective role in myocardial remodeling following β-adrenergic receptor stimulation. Here we investigated the role of ATM in cardiac remodeling using myocardial infarction (MI) as a model. Methods and Results: Left ventricular (LV) structure, function, apoptosis, fibrosis, and protein levels of apoptosis- and fibrosis-related proteins were examined in wild-type (WT) and ATM heterozygous knockout (hKO) mice 7 days post-MI. Infarct sizes were similar in both MI groups. However, infarct thickness was higher in hKO-MI group. Two dimensional M-mode echocardiography revealed decreased percent fractional shortening (%FS) and ejection fraction (EF) in both MI groups when compared to their respective sham groups. However, the decrease in %FS and EF was significantly greater in WT-MI vs hKO-MI. LV end systolic and diastolic diameters were greater in WT-MI vs hKO-MI. Fibrosis, apoptosis, and α-smooth muscle actin staining was significantly higher in hKO-MI vs WT-MI. MMP-2 protein levels and activity were increased to a similar extent in the infarct regions of both groups. MMP-9 protein levels were increased in the non-infarct region of WT-MI vs WT-sham. MMP-9 protein levels and activity were significantly lower in the infarct region of WT vs hKO. TIMP-2 protein levels similarly increased in both MI groups, whereas TIMP-4 protein levels were significantly lower in the infarct region of hKO group. Phosphorylation of p53 protein was higher, while protein levels of manganese superoxide dismutase were significantly lower in the infarct region of hKO vs WT. In vitro, inhibition of ATM using KU-55933 increased oxidative stress and apoptosis in cardiac myocytes.
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Affiliation(s)
- Cerrone R. Foster
- Department of Biomedical Sciences, James H Quillen College of Medicine, James H Quillen Veterans Affairs Medical Center, East Tennessee State University, Johnson City, Tennessee, United States of America
| | - Laura L. Daniel
- Department of Biomedical Sciences, James H Quillen College of Medicine, James H Quillen Veterans Affairs Medical Center, East Tennessee State University, Johnson City, Tennessee, United States of America
| | - Christopher R. Daniels
- Department of Biomedical Sciences, James H Quillen College of Medicine, James H Quillen Veterans Affairs Medical Center, East Tennessee State University, Johnson City, Tennessee, United States of America
| | - Suman Dalal
- Department of Biomedical Sciences, James H Quillen College of Medicine, James H Quillen Veterans Affairs Medical Center, East Tennessee State University, Johnson City, Tennessee, United States of America
| | - Mahipal Singh
- Department of Biomedical Sciences, James H Quillen College of Medicine, James H Quillen Veterans Affairs Medical Center, East Tennessee State University, Johnson City, Tennessee, United States of America
| | - Krishna Singh
- Department of Biomedical Sciences, James H Quillen College of Medicine, James H Quillen Veterans Affairs Medical Center, East Tennessee State University, Johnson City, Tennessee, United States of America
- * E-mail:
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Puccini J, Shalini S, Voss AK, Gatei M, Wilson CH, Hiwase DK, Lavin MF, Dorstyn L, Kumar S. Loss of caspase-2 augments lymphomagenesis and enhances genomic instability in Atm-deficient mice. Proc Natl Acad Sci U S A 2013; 110:19920-5. [PMID: 24248351 PMCID: PMC3856814 DOI: 10.1073/pnas.1311947110] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Caspase-2, the most evolutionarily conserved member of the caspase family, has been shown to be involved in apoptosis induced by various stimuli. Our recent work indicates that caspase-2 has putative functions in tumor suppression and protection against cellular stress. As such, the loss of caspase-2 enhances lymphomagenesis in Eµ-Myc transgenic mice, and caspase-2 KO (Casp2(-/-)) mice show characteristics of premature aging. However, the extent and specificity of caspase-2 function in tumor suppression is currently unclear. To further investigate this, ataxia telangiectasia mutated KO (Atm(-/-)) mice, which develop spontaneous thymic lymphomas, were used to generate Atm(-/-)Casp2(-/-) mice. Initial characterization revealed that caspase-2 deficiency enhanced growth retardation and caused synthetic perinatal lethality in Atm(-/-) mice. A comparison of tumor susceptibility demonstrated that Atm(-/-)Casp2(-/-) mice developed tumors with a dramatically increased incidence compared with Atm(-/-) mice. Atm(-/-)Casp2(-/-) tumor cells displayed an increased proliferative capacity and extensive aneuploidy that coincided with elevated oxidative damage. Furthermore, splenic and thymic T cells derived from premalignant Atm(-/-)Casp2(-/-) mice also showed increased levels of aneuploidy. These observations suggest that the tumor suppressor activity of caspase-2 is linked to its function in the maintenance of genomic stability and suppression of oxidative damage. Given that ATM and caspase-2 are important components of the DNA damage and antioxidant defense systems, which are essential for the maintenance of genomic stability, these proteins may synergistically function in tumor suppression by regulating these processes.
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Affiliation(s)
- Joseph Puccini
- Department of Hematology, Centre for Cancer Biology, SA Pathology, Adelaide, SA 5000, Australia
- Department of Medicine, University of Adelaide, Adelaide, SA 5005, Australia
| | - Sonia Shalini
- Department of Hematology, Centre for Cancer Biology, SA Pathology, Adelaide, SA 5000, Australia
| | - Anne K. Voss
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC 3052, Australia
- Department of Medical Biology, University of Melbourne, VIC 3050, Australia
| | - Magtouf Gatei
- Queensland Institute of Medical Research, Herston, QLD 4006, Australia
| | - Claire H. Wilson
- Department of Hematology, Centre for Cancer Biology, SA Pathology, Adelaide, SA 5000, Australia
| | - Devendra K. Hiwase
- Department of Hematology, Centre for Cancer Biology, SA Pathology, Adelaide, SA 5000, Australia
| | - Martin F. Lavin
- Queensland Institute of Medical Research, Herston, QLD 4006, Australia
- University of Queensland Centre for Clinical Research, Herston, QLD 4006, Australia; and
| | - Loretta Dorstyn
- Department of Hematology, Centre for Cancer Biology, SA Pathology, Adelaide, SA 5000, Australia
- Department of Medicine, University of Adelaide, Adelaide, SA 5005, Australia
- Division of Health Sciences, University of South Australia, Adelaide, SA 5001, Australia
| | - Sharad Kumar
- Department of Hematology, Centre for Cancer Biology, SA Pathology, Adelaide, SA 5000, Australia
- Department of Medicine, University of Adelaide, Adelaide, SA 5005, Australia
- Division of Health Sciences, University of South Australia, Adelaide, SA 5001, Australia
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35
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Rodrigues PMG, Grigaravicius P, Remus M, Cavalheiro GR, Gomes AL, Martins MR, Frappart L, Reuss D, McKinnon PJ, von Deimling A, Martins RAP, Frappart PO. Nbn and atm cooperate in a tissue and developmental stage-specific manner to prevent double strand breaks and apoptosis in developing brain and eye. PLoS One 2013; 8:e69209. [PMID: 23935957 PMCID: PMC3728324 DOI: 10.1371/journal.pone.0069209] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Accepted: 06/06/2013] [Indexed: 01/30/2023] Open
Abstract
Nibrin (NBN or NBS1) and ATM are key factors for DNA Double Strand Break (DSB) signaling and repair. Mutations in NBN or ATM result in Nijmegen Breakage Syndrome and Ataxia telangiectasia. These syndromes share common features such as radiosensitivity, neurological developmental defects and cancer predisposition. However, the functional synergy of Nbn and Atm in different tissues and developmental stages is not yet understood. Here, we show in vivo consequences of conditional inactivation of both genes in neural stem/progenitor cells using Nestin-Cre mice. Genetic inactivation of Atm in the central nervous system of Nbn-deficient mice led to reduced life span and increased DSBs, resulting in increased apoptosis during neural development. Surprisingly, the increase of DSBs and apoptosis was found only in few tissues including cerebellum, ganglionic eminences and lens. In sharp contrast, we showed that apoptosis associated with Nbn deletion was prevented by simultaneous inactivation of Atm in developing retina. Therefore, we propose that Nbn and Atm collaborate to prevent DSB accumulation and apoptosis during development in a tissue- and developmental stage-specific manner.
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Affiliation(s)
- Paulo M. G. Rodrigues
- Programa de Biologia Celular e do Desenvolvimento, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Paulius Grigaravicius
- Clinical Cooperation Unit Neuropathology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Martina Remus
- Clinical Cooperation Unit Neuropathology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Gabriel R. Cavalheiro
- Programa de Biologia Celular e do Desenvolvimento, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Anielle L. Gomes
- Programa de Biologia Celular e do Desenvolvimento, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Mauricio R. Martins
- Programa de Pós Graduação em Biofísica, IBCCF, Universidade Federal do Rio de Janeiro, CCS, Rio de Janeiro, Brazil
| | - Lucien Frappart
- Leibniz Institute for Age Research – Fritz Lipmann Institute (FLI), Jena, Germany
| | - David Reuss
- Clinical Cooperation Unit Neuropathology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Department of Neuropathology, Institute of Pathology, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
| | - Peter J. McKinnon
- Department of Genetics, St.Jude Children's Research Hospital, Memphis, Tennessee, United States of America
| | - Andreas von Deimling
- Clinical Cooperation Unit Neuropathology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Department of Neuropathology, Institute of Pathology, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
| | - Rodrigo A. P. Martins
- Programa de Biologia Celular e do Desenvolvimento, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
- * E-mail: (POF); (RAPM)
| | - Pierre-Olivier Frappart
- Clinical Cooperation Unit Neuropathology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- * E-mail: (POF); (RAPM)
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Yao Y, Bilichak A, Titov V, Golubov A, Kovalchuk I. Genome stability of Arabidopsis atm, ku80 and rad51b mutants: somatic and transgenerational responses to stress. Plant Cell Physiol 2013; 54:982-9. [PMID: 23574700 DOI: 10.1093/pcp/pct051] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
DNA double-strand breaks (DSBs) can be repaired via two main mechanisms: non-homologous end joining (NHEJ) and homologous recombination (HR). Our previous work showed that exposure to abiotic stresses resulted in an increase in point mutation frequency (PMF) and homologous recombination frequency (HRF), and these changes were heritable. We hypothesized that mutants impaired in DSB recognition and repair would also be deficient in somatic and transgenerational changes in PMF and HRF. To test this hypothesis, we analyzed the genome stability of the Arabidopsis thaliana mutants deficient in ATM (communication between DNA strand break recognition and the repair machinery), KU80 (deficient in NHEJ) and RAD51B (deficient in HR repair) genes. We found that all three mutants exhibited higher levels of DSBs. Plants impaired in ATM had a lower spontaneous PMF and HRF, whereas ku80 plants had higher frequencies. Plants impaired in RAD51B had a lower HRF. HRF in wild-type, atm and rad51b plants increased in response to several abiotic stressors, whereas it did not increase in ku80 plants. The progeny of stressed wild-type and ku80 plants exhibited an increase in HRF in response to all stresses, and the increase was higher in ku80 plants. The progeny of atm plants showed an increase in HRF only when the parental generation was exposed to cold or flood, whereas the progeny of rad51b plants completely lacked a transgenerational increase in HRF. Our experiments showed that mutants impaired in the recognition and repair of DSBs exhibited changes in the efficiency of DNA repair as reflected by changes in strand breaks, point mutation and HRF. They also showed that the HR RAD51B protein and the protein ATM that recognized damaged DNA might play an important role in transgenerational changes in HRF.
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Affiliation(s)
- Youli Yao
- Department of Biological Sciences, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada
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