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Chen PL, Chen CF, Lin HYH, Riley DJ, Chen Y. The Link between Autosomal Dominant Polycystic Kidney Disease and Chromosomal Instability: Exploring the Relationship. Int J Mol Sci 2024; 25:2936. [PMID: 38474184 PMCID: PMC10932443 DOI: 10.3390/ijms25052936] [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: 01/29/2024] [Revised: 02/27/2024] [Accepted: 03/01/2024] [Indexed: 03/14/2024] Open
Abstract
In autosomal dominant polycystic kidney disease (ADPKD) with germline mutations in a PKD1 or PKD2 gene, innumerable cysts develop from tubules, and renal function deteriorates. Second-hit somatic mutations and renal tubular epithelial (RTE) cell death are crucial features of cyst initiation and disease progression. Here, we use established RTE lines and primary ADPKD cells with disease-associated PKD1 mutations to investigate genomic instability and DNA damage responses. We found that ADPKD cells suffer severe chromosome breakage, aneuploidy, heightened susceptibility to DNA damage, and delayed checkpoint activation. Immunohistochemical analyses of human kidneys corroborated observations in cultured cells. DNA damage sensors (ATM/ATR) were activated but did not localize at nuclear sites of damaged DNA and did not properly activate downstream transducers (CHK1/CHK2). ADPKD cells also had the ability to transform, as they achieved high saturation density and formed colonies in soft agar. Our studies indicate that defective DNA damage repair pathways and the somatic mutagenesis they cause contribute fundamentally to the pathogenesis of ADPKD. Acquired mutations may alternatively confer proliferative advantages to the clonally expanded cell populations or lead to apoptosis. Further understanding of the molecular details of aberrant DNA damage responses in ADPKD is ongoing and holds promise for targeted therapies.
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Affiliation(s)
- Phang-Lang Chen
- Department of Biological Chemistry, University of California, Irvine, CA 92697, USA; (P.-L.C.); (C.-F.C.)
| | - Chi-Fen Chen
- Department of Biological Chemistry, University of California, Irvine, CA 92697, USA; (P.-L.C.); (C.-F.C.)
| | - Hugo Y.-H. Lin
- Division of Nephrology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 807, Taiwan;
- Internal Medicine, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Department of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Daniel J. Riley
- Department of Medicine, Division of Nephrology, University of Texas Health, San Antonio, TX 78245, USA;
| | - Yumay Chen
- Department of Medicine, Division of Endocrinology, University of California, Irvine, CA 92697, USA
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Chuang TC, Shao WS, Hsu SC, Lee SL, Kao MC, Wang V. Baicalein Induces G 2/M Cell Cycle Arrest Associated with ROS Generation and CHK2 Activation in Highly Invasive Human Ovarian Cancer Cells. Molecules 2023; 28:molecules28031039. [PMID: 36770705 PMCID: PMC9919047 DOI: 10.3390/molecules28031039] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 01/13/2023] [Accepted: 01/18/2023] [Indexed: 01/21/2023] Open
Abstract
Ovarian cancer is a lethal gynecological cancer because drug resistance often results in treatment failure. The CHK2, a tumor suppressor, is considered to be an important molecular target in ovarian cancer due to its role in DNA repair. Dysfunctional CHK2 impairs DNA damage-induced checkpoints, reduces apoptosis, and confers resistance to chemotherapeutic drugs and radiation therapy in ovarian cancer cells. This provides a basis for finding new effective agents targeting CHK2 upregulation or activation to treat or prevent the progression of advanced ovarian cancer. Here, the results show that baicalein (5,6,7-trihydroxyflavone) treatment inhibits the growth of highly invasive ovarian cancer cells, and that baicalein-induced growth inhibition is mediated by the cell cycle arrest in the G2/M phase. Baicalein-induced G2/M phase arrest is associated with an increased reactive oxygen species (ROS) production, DNA damage, and CHK2 upregulation and activation. Thus, baicalein modulates the expression of DNA damage response proteins and G2/M phase regulatory molecules. Blockade of CHK2 activation by CHK2 inhibitors protects cells from baicalein-mediated G2/M cell cycle arrest. All the results suggest that baicalein has another novel growth inhibitory effect on highly invasive ovarian cancer cells, which is partly related to G2/M cell cycle arrest through the ROS-mediated DNA breakage damage and CHK2 activation. Collectively, our findings provide a molecular basis for the potential of baicalein as an adjuvant therapeutic agent in the treatment of metastatic ovarian cancer.
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Affiliation(s)
- Tzu-Chao Chuang
- Department of Chemistry, Tamkang University, New Taipei 251301, Taiwan
- Correspondence:
| | - Wei-Syun Shao
- Department of Chemistry, Tamkang University, New Taipei 251301, Taiwan
| | - Shih-Chung Hsu
- Department of Early Childhood Care and Education, University of Kang Ning, Taipei 114311, Taiwan
| | - Shou-Lun Lee
- Department of Biological Science and Technology, China Medical University, Taichung 406040, Taiwan
| | - Ming-Ching Kao
- Department of Biological Science and Technology, China Medical University, Taichung 406040, Taiwan
| | - Vinchi Wang
- Department of Neurology, Cardinal Tien Hospital, New Taipei 231009, Taiwan
- School of Medicine, College of Medicine, Fu-Jen Catholic University, New Taipei 242062, Taiwan
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Tsoi H, Tsang WC, Man EPS, Leung MH, You CP, Chan SY, Chan WL, Khoo US. Checkpoint Kinase 2 Inhibition Can Reverse Tamoxifen Resistance in ER-Positive Breast Cancer. Int J Mol Sci 2022; 23:ijms232012290. [PMID: 36293165 PMCID: PMC9604393 DOI: 10.3390/ijms232012290] [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: 09/07/2022] [Revised: 10/11/2022] [Accepted: 10/13/2022] [Indexed: 11/06/2022] Open
Abstract
Breast cancer is a heterogeneous disease. Tamoxifen is frequently used to treat ER-positive breast cancer. Our team has identified a novel splice variant of NCOR2, BQ323636.1 (BQ), that mediates tamoxifen resistance. However, the upstream factors that modulate BQ expression are not apparent. This study reveals that tamoxifen treatment causes induction of DNA damage which can enhance BQ expression. We show that DNA damage can activate the ATM/CHK2 and ATR/CHK1 signalling cascades and confirm that ATM/CHK2 signalling is responsible for enhancing the protein stability of BQ. siRNA or a small inhibitor targeting CHK2 resulted in the reduction in BQ expression through reduced phosphorylation and enhanced poly-ubiquitination of BQ. Inhibition of CHK2 by CCT241533 could reverse tamoxifen resistance in vitro and in vivo. Using clinical samples in the tissue microarray, we confirmed that high p-CHK2 expression was significantly associated with high nuclear BQ expression, tamoxifen resistance and poorer overall and disease-specific survival. In conclusion, tamoxifen treatment can enhance BQ expression in ER-positive breast cancer by activating the ATM/CHK2 axis. Targeting CHK2 is a promising approach to overcoming tamoxifen resistance in ER-positive breast cancer.
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Affiliation(s)
- Ho Tsoi
- Department of Pathology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Wai-Chung Tsang
- Department of Pathology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Ellen P. S. Man
- Department of Pathology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Man-Hong Leung
- Department of Pathology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Chan-Ping You
- Department of Pathology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Sum-Yin Chan
- Department of Clinical Oncology, Queen Mary Hospital, Hong Kong SAR, China
| | - Wing-Lok Chan
- Department of Clinical Oncology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Ui-Soon Khoo
- Department of Pathology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
- Correspondence: ; Tel.: +852-2255-2664; Fax: +852-2218-5205
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Mahjabeen I, Sheshe S, Shakoor T, Hussain MZ, Rizwan M, Mehmood A, Haris MS, Fazal F, Burki A, Kayani MA. Role of genetic variations of DNA damage response pathway genes and heat-shock proteins in increased head and neck cancer risk. Future Oncol 2022; 18:3519-3535. [PMID: 36200797 DOI: 10.2217/fon-2022-0750] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Aim: The present study was designed to evaluate the role of DNA damage response pathway genes and heat-shock proteins in head and neck cancer (HNC) risk. Methods: For this purpose, two study cohorts were used. Cohort 1 (blood samples of 250 HNC patients and 250 controls) was used for polymorphism screening of selected genes using tetra-primer amplification refractory mutation system-polymerase chain (Tetra-ARMS PCR). Cohort 2 (200 HNC tumors and adjacent controls) was used for expression analysis, using quantitative PCR. Results: Analysis showed that mutant allele frequency of selected polymorphisms was found associated with increased HNC risk. Expression analysis showed the significant deregulation of selected genes in patients. Conclusion: The present study showed that selected genes (CHK1, CHK2, HSP70 and HSP90) can act as good diagnostic/prognostic markers in HNC.
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Affiliation(s)
- Ishrat Mahjabeen
- Cancer Genetics and Epigenetics Lab, Department of Biosciences, COMSATS University Islamabad, Islamabad, Pakistan
| | - Sadeeq Sheshe
- Cancer Genetics and Epigenetics Lab, Department of Biosciences, COMSATS University Islamabad, Islamabad, Pakistan
| | - Tehmina Shakoor
- Cancer Genetics and Epigenetics Lab, Department of Biosciences, COMSATS University Islamabad, Islamabad, Pakistan
| | | | - Muhammad Rizwan
- Cancer Genetics and Epigenetics Lab, Department of Biosciences, COMSATS University Islamabad, Islamabad, Pakistan
| | - Azher Mehmood
- Cancer Genetics and Epigenetics Lab, Department of Biosciences, COMSATS University Islamabad, Islamabad, Pakistan
| | - Muhammad Shahbaz Haris
- Cancer Genetics and Epigenetics Lab, Department of Biosciences, COMSATS University Islamabad, Islamabad, Pakistan
| | - Falak Fazal
- Cancer Genetics and Epigenetics Lab, Department of Biosciences, COMSATS University Islamabad, Islamabad, Pakistan
| | - Ayesha Burki
- Cancer Genetics and Epigenetics Lab, Department of Biosciences, COMSATS University Islamabad, Islamabad, Pakistan
| | - Mahmood Akhtar Kayani
- Cancer Genetics and Epigenetics Lab, Department of Biosciences, COMSATS University Islamabad, Islamabad, Pakistan
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Guo R, Wang SS, Jiang XY, Zhang Y, Guo Y, Cui HY, Guo QQ, Cao L, Xie XC. CHK2 Promotes Metabolic Stress-Induced Autophagy through ULK1 Phosphorylation. Antioxidants (Basel) 2022; 11:1166. [PMID: 35740063 DOI: 10.3390/antiox11061166] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 06/03/2022] [Accepted: 06/09/2022] [Indexed: 01/27/2023] Open
Abstract
Reactive oxygen species (ROS) act as a signaling intermediate to promote cellular adaptation to maintain homeostasis by regulating autophagy during pathophysiological stress. However, the mechanism by which ROS promotes autophagy is still largely unknown. Here, we show that the ATM/CHK2/ULK1 axis initiates autophagy to maintain cellular homeostasis by sensing ROS signaling under metabolic stress. We report that ULK1 is a physiological substrate of CHK2, and that the binding of CHK2 to ULK1 depends on the ROS signal and the phosphorylation of threonine 68 of CHK2 under metabolic stress. Further, CHK2 phosphorylates ULK1 on serine 556, and this phosphorylation is dependent on the ATM/CHK2 signaling pathway. CHK2-mediated phosphorylation of ULK1 promotes autophagic flux and inhibits apoptosis induced by metabolic stress. Taken together, these results demonstrate that the ATM/CHK2/ULK1 axis initiates an autophagic adaptive response by sensing ROS, and it protects cells from metabolic stress-induced cellular damage.
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Tikhomirova M, Topchu I, Mazitova A, Barmin V, Ratner E, Sabirov A, Abramova Z, Deneka AY. NEDD9 Restrains dsDNA Damage Response during Non-Small Cell Lung Cancer (NSCLC) Progression. Cancers (Basel) 2022; 14:2517. [PMID: 35626121 PMCID: PMC9139181 DOI: 10.3390/cancers14102517] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 05/05/2022] [Accepted: 05/18/2022] [Indexed: 12/10/2022] Open
Abstract
DNA damaging modalities are the backbone of treatments for non-small cell lung cancer (NSCLC). Alterations in DNA damage response (DDR) in tumor cells commonly contribute to emerging resistance to platinating agents, other targeted therapies, and radiation. The goal of this study is to identify the previously unreported role of NEDD9 scaffolding protein in controlling DDR processes and sensitivity to DNA damaging therapies. Using a siRNA-mediated approach to deplete NEDD9 in a group of human and murine KRAS/TP53-mutant NSCLC cell lines, coupled with a set of cell viability and clonogenic assays, flow cytometry analysis, and Western blotting, we evaluated the effects of NEDD9 silencing on cellular proliferation, DDR and epithelial-to-mesenchymal transition (EMT) signaling, cell cycle, and sensitivity to cisplatin and UV irradiation. Using publicly available NSCLC datasets (TCGA) and an independent cohort of primary NSCLC tumors, subsequent in silico and immunohistochemical (IHC) analyses were performed to assess relevant changes in NEDD9 RNA and protein expression across different stages of NSCLC. The results of our study demonstrate that NEDD9 depletion is associated with the increased tumorigenic capacity of NSCLC cells. These phenotypes were accompanied by significantly upregulated ATM-CHK2 signaling, shifting towards a more mesenchymal phenotype in NEDD9 depleted cells and elevated sensitivity to UV-irradiation. IHC analyses revealed an association between reduced NEDD9 protein expression and a decrease in overall (OS) and progression-free survival (PFS) of the NSCLC patients. These data, for the first time, identified NEDD9 as a negative regulator of ATM kinase activity and related DDR signaling in numerous KRAS/TP53 mutated NSCLC, with its effects on the regulation of DDR-dependent EMT signaling, sensitivity to DNA damaging modalities in tumor cells, and the survival of the patients.
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Affiliation(s)
- Mariya Tikhomirova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420000 Kazan, Russia; (M.T.); (I.T.); (A.M.); (Z.A.)
| | - Iuliia Topchu
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420000 Kazan, Russia; (M.T.); (I.T.); (A.M.); (Z.A.)
- Feinberg School of Medicine, Northwestern University, Chicago, IL 60610, USA
| | - Aleksandra Mazitova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420000 Kazan, Russia; (M.T.); (I.T.); (A.M.); (Z.A.)
- Department of Medicine and Biomedical Science, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Vitaly Barmin
- Moscow P.A. Gertsen Oncological Research Institute, 125284 Moscow, Russia;
| | - Ekaterina Ratner
- Republican M.Z.Sigal Clinical Oncology Hospital, 420029 Kazan, Russia; (E.R.); (A.S.)
| | - Alexey Sabirov
- Republican M.Z.Sigal Clinical Oncology Hospital, 420029 Kazan, Russia; (E.R.); (A.S.)
| | - Zinaida Abramova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420000 Kazan, Russia; (M.T.); (I.T.); (A.M.); (Z.A.)
| | - Alexander Y. Deneka
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420000 Kazan, Russia; (M.T.); (I.T.); (A.M.); (Z.A.)
- Program in Molecular Therapeutics, Fox Chase Cancer Center, Philadelphia, PA 19111, USA
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Raafat Elsayed AA, Al-Marsoummi S, Vomhof-Dekrey EE, Basson MD. SLFN12 Over-expression Sensitizes Triple Negative Breast Cancer Cells to Chemotherapy Drugs and Radiotherapy. Cancer Genomics Proteomics 2022; 19:328-338. [PMID: 35430566 PMCID: PMC9016483 DOI: 10.21873/cgp.20323] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 01/19/2022] [Revised: 01/31/2022] [Accepted: 02/02/2022] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND/AIM Schlafen 12 (SLFN12) expression correlates with survival in triple negative breast cancer (TNBC). SLFN12 slows TNBC proliferation and induces TNBC differentiation, but whether SLFN12 affects the tumoral response to chemotherapy or radiation is unknown. MATERIALS AND METHODS We over-expressed SLFN12 in MDA-MB-231 cells using two different lentiviral vectors. We assessed viable cell numbers via crystal violet assay after treatment with carboplatin, paclitaxel, olaparib, zoledronic acid, camptothecin, or cesium irradiation. CHK1 and CHK2 phosphorylation was assessed by western blot and the effects of inhibiting CHK1/CHK2 by AZD7762 were examined. Key findings were confirmed in Hs578t and BT549 TNBC cells after adenoviral SLFN12 over-expression. RESULTS SLFN12 over-expression increased TNBC sensitivity to radiation, carboplatin, paclitaxel, zoledronic acid, and camptothecin, but not to olaparib. SLFN12 over-expression decreased CHK1 and CHK2 phosphorylation after treatment with the DNA damaging agent camptothecin (CPT). The CHK1/CHK2 inhibitor diminished the significant cytotoxicity difference between over-expression and baseline SLFN12 levels in response to carboplatin. CONCLUSION SLFN12 increases TNBC sensitivity to DNA-damaging agents at least in part by reducing CHK1/2 phosphorylation. This may contribute to improved survival in patients whose TNBC over-expresses SLFN12. Therefore, SLFN12 levels may be used to customize or predict radiotherapy and chemotherapy effects in TNBC.
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Affiliation(s)
- Ahmed Adham Raafat Elsayed
- Department of Surgery, School of Medicine and the Health Sciences, University of North Dakota, Grand Forks, ND, U.S.A
| | - Sarmad Al-Marsoummi
- Department of Pathology, School of Medicine and the Health Sciences, University of North Dakota, Grand Forks, ND, U.S.A
| | - Emilie E Vomhof-Dekrey
- Department of Surgery, School of Medicine and the Health Sciences, University of North Dakota, Grand Forks, ND, U.S.A
- Department of Biomedical Sciences, School of Medicine and the Health Sciences, University of North Dakota, Grand Forks, ND, U.S.A
| | - Marc D Basson
- Department of Surgery, School of Medicine and the Health Sciences, University of North Dakota, Grand Forks, ND, U.S.A.;
- Department of Pathology, School of Medicine and the Health Sciences, University of North Dakota, Grand Forks, ND, U.S.A
- Department of Biomedical Sciences, School of Medicine and the Health Sciences, University of North Dakota, Grand Forks, ND, U.S.A
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Pescatori S, Leone S, Cipolletti M, Bartoloni S, di Masi A, Acconcia F. Clinically relevant CHK1 inhibitors abrogate wild-type and Y537S mutant ERα expression and proliferation in luminal primary and metastatic breast cancer cells. J Exp Clin Cancer Res 2022; 41:141. [PMID: 35418303 PMCID: PMC9006609 DOI: 10.1186/s13046-022-02360-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [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: 02/05/2022] [Accepted: 04/07/2022] [Indexed: 04/12/2023] Open
Abstract
BACKGROUND Challenges exist in the clinical treatment of luminal estrogen receptor α (ERα)-positive breast cancers (BCs) both to prevent resistance to endocrine therapy (ET) and to treat ET-resistant metastatic BCs (MBC). Therefore, we evaluated if kinases could be new targets for the treatment of luminal primary and MBCs. METHODS ~ 170 kinase inhibitors were applied to MCF-7 cells either with adaptative or genetic resistance to ET drugs and both ERα levels and cell proliferation were measured. Robust-Z-score calculation identified AZD7762 (CHK1/CHK2 inhibitor) as a positive hit. Subsequently, Kaplan-Meier analyses of CHK1 and CHK2 impact on ERα-positive BC patients relapse-free-survival (RFS), bioinformatic evaluations of CHK1 and CHK2 expression and activation status as a function of ERα activation status as well as drug sensitivity studies in ERα-positive BC cell lines, validation of the impact of the ATR:CHK1 and ATM:CHK2 pathways on the control of ERα stability and BC cell proliferation via inhibitor- and siRNA-based approaches, identification of the molecular mechanism required for inhibitor-dependent ERα degradation in BC and the impact of CHK1 and CHK2 inhibition on the 17β-estradiol (E2):ERα signaling, synergy proliferation studies between ET-drugs and clinically relevant CHK1 inhibitors in different luminal BC cell lines, were performed. RESULTS A reduced CHK1 expression correlates with a longer RFS in women with ERα-positive BCs. Interestingly, women carrying luminal A BC display an extended RFS when expressing low CHK1 levels. Accordingly, CHK1 and ERα activations are correlated in ERα-positive BC cell lines, and the ATR:CHK1 pathway controls ERα stability and cell proliferation in luminal A BC cells. Mechanistically, the generation of DNA replication stress rather than DNA damage induced by ATR:CHK1 pathway inhibition is a prerequisite for ERα degradation. Furthermore, CHK1 inhibition interferes with E2:ERα signaling to cell proliferation, and drugs approved for clinical treatment of primary and MBC (4OH-tamoxifen and the CDK4/CDK6 inhibitors abemaciclib and palbociclib) exert synergic effects with the CHK1 inhibitors in clinical trials for the treatment of solid tumors (AZD7762, MK8776, prexasertib) in preventing the proliferation of cells modeling primary and MBC. CONCLUSIONS CHK1 could be considered as an appealing novel pharmacological target for the treatment of luminal primary and MBCs.
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Affiliation(s)
- Sara Pescatori
- Department of Sciences, Section Biomedical Sciences, and Technology, University Roma Tre, Viale Guglielmo Marconi, 446, I-00146, Rome, Italy
| | - Stefano Leone
- Department of Sciences, Section Biomedical Sciences, and Technology, University Roma Tre, Viale Guglielmo Marconi, 446, I-00146, Rome, Italy
| | - Manuela Cipolletti
- Department of Sciences, Section Biomedical Sciences, and Technology, University Roma Tre, Viale Guglielmo Marconi, 446, I-00146, Rome, Italy
| | - Stefania Bartoloni
- Department of Sciences, Section Biomedical Sciences, and Technology, University Roma Tre, Viale Guglielmo Marconi, 446, I-00146, Rome, Italy
| | - Alessandra di Masi
- Department of Sciences, Section Biomedical Sciences, and Technology, University Roma Tre, Viale Guglielmo Marconi, 446, I-00146, Rome, Italy
| | - Filippo Acconcia
- Department of Sciences, Section Biomedical Sciences, and Technology, University Roma Tre, Viale Guglielmo Marconi, 446, I-00146, Rome, Italy.
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Zhou S, Zhao A, Wu Y, Bao T, Mi Y, Zhang C. Protective Effect of Follicle-Stimulating Hormone on DNA Damage of Chicken Follicular Granulosa Cells by Inhibiting CHK2/p53. Cells 2022; 11:1291. [PMID: 35455970 DOI: 10.3390/cells11081291] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 04/06/2022] [Accepted: 04/07/2022] [Indexed: 01/13/2023] Open
Abstract
The increase in follicular atresia and the decrease in the fecundity of laying hens occur with the aging process. Therefore, the key measure for maintaining high laying performance is to alleviate follicular atresia in the aging poultry. Follicle-stimulating hormone (FSH), as an important pituitary hormone to promote follicle development and maturation, plays an important role in preventing reproductive aging in diverse animals. In this study, the physiological state of the prehierarchical small white follicles (SWFs) and atretic SWFs (ASWFs) were compared, followed by an exploration of the possible capacity of FSH to delay ASWFs’ progression in the hens. The results showed that the DNA damage within follicles increased with aging, along with Golgi complex disintegration, cell cycle arrest, increased apoptosis and autophagy in the ASWFs. Subsequently, the ACNU-induced follicular atresia model was established to evaluate the enhancing capacity of FSH on increasing cell proliferation and attenuating apoptosis in ASWFs. FSH inhibited DNA damage and promoted DNA repair by regulating the CHK2/p53 pathway. Furthermore, FSH inhibited CHK2/p53, thus, suppressing the disintegration of the Golgi complex, cell cycle arrest, and increased autophagy in the atretic follicles. Moreover, these effects from FSH treatment in ACNU-induced granulosa cells were similar to the treatment by a DNA repair agent AV-153. These results indicate that FSH protects aging-resulted DNA damage in granulosa cells by inhibiting CHK2/p53 in chicken prehierarchical follicles.
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Abstract
DNA damage response (DDR) is critical to ensure genome stability, and defects in this signaling pathway are highly associated with carcinogenesis and tumor progression. Nevertheless, this also provides therapeutic opportunities, as cells with defective DDR signaling are directed to rely on compensatory survival pathways, and these vulnerabilities have been exploited for anticancer treatments. Following the impressive success of PARP inhibitors in the treatment of BRCA-mutated breast and ovarian cancers, extensive research has been conducted toward the development of pharmacologic inhibitors of the key components of the DDR signaling pathway. In this review, we discuss the key elements of the DDR pathway and how these molecular components may serve as anticancer treatment targets. We also summarize the recent promising developments in the field of DDR pathway inhibitors, focusing on novel agents beyond PARP inhibitors. Furthermore, we discuss biomarker studies to identify target patients expected to derive maximal clinical benefits as well as combination strategies with other classes of anticancer agents to synergize and optimize the clinical benefits.
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Affiliation(s)
- Wonyoung Choi
- Research Institute, National Cancer Center, Goyang 10408, Korea;
- Center for Clinical Trials, National Cancer Center, Goyang 10408, Korea
| | - Eun Sook Lee
- Research Institute, National Cancer Center, Goyang 10408, Korea;
- Center for Breast Cancer, National Cancer Center, Goyang 10408, Korea
- Correspondence: ; Tel.: +82-31-920-1633
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Chen G, Wang M, Ruan Z, Zhu L, Tang C. Mesenchymal stem cell-derived exosomal miR-143-3p suppresses myocardial ischemia-reperfusion injury by regulating autophagy. Life Sci 2021; 280:119742. [PMID: 34166712 DOI: 10.1016/j.lfs.2021.119742] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [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: 02/24/2021] [Revised: 06/08/2021] [Accepted: 06/09/2021] [Indexed: 10/21/2022]
Abstract
AIMS Myocardial ischemia-reperfusion (I/R) injury is considered as a major obstacle of myocardial perfusion to save acute myocardial infarction, and causes a serious threat to human health. An extensive body of evidence has unveiled that mesenchymal stem cells (MSCs) as adult stem cells play a vital role in the field of damaged myocardial regeneration and repair. However, the biological role of MSCs derived-exosomes in the protection of myocardial I/R injury has not been elucidated. MAIN METHODS In this study, we isolated and characterized MSCs from the bone marrow of rats femur and tibia. H9c2 cells were administrated to established the cellular hypoxia-reoxygenation (H/R) model, and co-cultured with MSCs and MSCs-derived exosomes. KEY FINDINGS Functional experiments revealed that MSCs and MSCs-derived exosomes inhibited H/R-induced cell apoptosis and cell autophagy. Interestingly, rapamycin as an activator of autophagy reversed the positive effects of MSCs-derived exosomes, while 3-methyladenine (3-MA) as autophagy inhibitor further promoted the effects of MSCs-derived exosomes, indicating MSCs exerted its function on H/R injury by mediating autophagy. Subsequently, we found that CHK2-Beclin2 pathway participated in H/R-induced autophagy. Mechanistically, miR-143-3p directly targeted CHK2 and negatively regulated CHK2 expression. Moreover, repression of exosomal miR-143-3p promoted H/R-induced autophagy via CHK2-Beclin2 pathway. Consistent with the results of in vitro experiments, in vivo experiments confirmed that exosomal miR-143-3p effectively reduced cell apoptosis by regulating autophagy via CHK2-Beclin2 pathway. SIGNIFICANCE Collectively, our results indicated that MSCs-derived exosomal miR-143-3p might represent a promising option for the treatment of I/R injury.
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Affiliation(s)
- Gecai Chen
- Department of Cardiology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing Jiangsu Province 210009, China; Department of Cardiology, Taizhou People's Hospital, Taizhou, Jiangsu Province 225300, China.
| | - Meixiang Wang
- Department of Cardiology, Taizhou People's Hospital, Taizhou, Jiangsu Province 225300, China
| | - Zhongbao Ruan
- Department of Cardiology, Taizhou People's Hospital, Taizhou, Jiangsu Province 225300, China
| | - Li Zhu
- Department of Cardiology, Taizhou People's Hospital, Taizhou, Jiangsu Province 225300, China
| | - Chengchun Tang
- Department of Cardiology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing Jiangsu Province 210009, China.
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12
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García-Santisteban I, Llopis A, Krenning L, Vallejo-Rodríguez J, van den Broek B, Zubiaga AM, Medema RH. Sustained CHK2 activity, but not ATM activity, is critical to maintain a G1 arrest after DNA damage in untransformed cells. BMC Biol 2021; 19:35. [PMID: 33607997 PMCID: PMC7896382 DOI: 10.1186/s12915-021-00965-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 01/22/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The G1 checkpoint is a critical regulator of genomic stability in untransformed cells, preventing cell cycle progression after DNA damage. DNA double-strand breaks (DSBs) recruit and activate ATM, a kinase which in turn activates the CHK2 kinase to establish G1 arrest. While the onset of G1 arrest is well understood, the specific role that ATM and CHK2 play in regulating G1 checkpoint maintenance remains poorly characterized. RESULTS Here we examine the impact of ATM and CHK2 activities on G1 checkpoint maintenance in untransformed cells after DNA damage caused by DSBs. We show that ATM becomes dispensable for G1 checkpoint maintenance as early as 1 h after DSB induction. In contrast, CHK2 kinase activity is necessary to maintain the G1 arrest, independently of ATM, ATR, and DNA-PKcs, implying that the G1 arrest is maintained in a lesion-independent manner. Sustained CHK2 activity is achieved through auto-activation and its acute inhibition enables cells to abrogate the G1-checkpoint and enter into S-phase. Accordingly, we show that CHK2 activity is lost in cells that recover from the G1 arrest, pointing to the involvement of a phosphatase with fast turnover. CONCLUSION Our data indicate that G1 checkpoint maintenance relies on CHK2 and that its negative regulation is crucial for G1 checkpoint recovery after DSB induction.
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Affiliation(s)
- Iraia García-Santisteban
- Department of Genetics, Physical Anthropology and Animal Physiology, University of the Basque Country (UPV/EHU), B/Sarriena s/n, 48940, Leioa, Basque Country, Spain.,Oncode Institute, Division of Cell Biology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066, CX, Amsterdam, The Netherlands
| | - Alba Llopis
- Oncode Institute, Division of Cell Biology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066, CX, Amsterdam, The Netherlands
| | - Lenno Krenning
- Oncode Institute, Division of Cell Biology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066, CX, Amsterdam, The Netherlands
| | - Jon Vallejo-Rodríguez
- Department of Genetics, Physical Anthropology and Animal Physiology, University of the Basque Country (UPV/EHU), B/Sarriena s/n, 48940, Leioa, Basque Country, Spain
| | - Bram van den Broek
- Oncode Institute, Division of Cell Biology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066, CX, Amsterdam, The Netherlands
| | - Ana M Zubiaga
- Department of Genetics, Physical Anthropology and Animal Physiology, University of the Basque Country (UPV/EHU), B/Sarriena s/n, 48940, Leioa, Basque Country, Spain.
| | - René H Medema
- Oncode Institute, Division of Cell Biology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066, CX, Amsterdam, The Netherlands.
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13
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Cuella-Martin R, Hayward SB, Fan X, Chen X, Huang JW, Taglialatela A, Leuzzi G, Zhao J, Rabadan R, Lu C, Shen Y, Ciccia A. Functional interrogation of DNA damage response variants with base editing screens. Cell 2021; 184:1081-1097.e19. [PMID: 33606978 PMCID: PMC8018281 DOI: 10.1016/j.cell.2021.01.041] [Citation(s) in RCA: 125] [Impact Index Per Article: 41.7] [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: 05/06/2020] [Revised: 11/16/2020] [Accepted: 01/22/2021] [Indexed: 12/13/2022]
Abstract
Mutations in DNA damage response (DDR) genes endanger genome integrity and predispose to cancer and genetic disorders. Here, using CRISPR-dependent cytosine base editing screens, we identify > 2,000 sgRNAs that generate nucleotide variants in 86 DDR genes, resulting in altered cellular fitness upon DNA damage. Among those variants, we discover loss- and gain-of-function mutants in the Tudor domain of the DDR regulator 53BP1 that define a non-canonical surface required for binding the deubiquitinase USP28. Moreover, we characterize variants of the TRAIP ubiquitin ligase that define a domain, whose loss renders cells resistant to topoisomerase I inhibition. Finally, we identify mutations in the ATM kinase with opposing genome stability phenotypes and loss-of-function mutations in the CHK2 kinase previously categorized as variants of uncertain significance for breast cancer. We anticipate that this resource will enable the discovery of additional DDR gene functions and expedite studies of DDR variants in human disease.
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Affiliation(s)
- Raquel Cuella-Martin
- Department of Genetics and Development, Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Samuel B Hayward
- Department of Genetics and Development, Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Xiao Fan
- Department of Systems Biology, Columbia University Irving Medical Center, New York, NY 10032, USA; Department of Biomedical Informatics, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Xiao Chen
- Department of Genetics and Development, Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Jen-Wei Huang
- Department of Genetics and Development, Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Angelo Taglialatela
- Department of Genetics and Development, Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Giuseppe Leuzzi
- Department of Genetics and Development, Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Junfei Zhao
- Department of Systems Biology, Columbia University Irving Medical Center, New York, NY 10032, USA; Department of Biomedical Informatics, Columbia University Irving Medical Center, New York, NY 10032, USA; Program for Mathematical Genomics, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Raul Rabadan
- Department of Systems Biology, Columbia University Irving Medical Center, New York, NY 10032, USA; Department of Biomedical Informatics, Columbia University Irving Medical Center, New York, NY 10032, USA; Program for Mathematical Genomics, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Chao Lu
- Department of Genetics and Development, Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Yufeng Shen
- Department of Systems Biology, Columbia University Irving Medical Center, New York, NY 10032, USA; Department of Biomedical Informatics, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Alberto Ciccia
- Department of Genetics and Development, Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA.
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14
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Petsalaki E, Zachos G. An ATM- CHK2-INCENP pathway prevents chromatin breakage by regulating the abscission checkpoint. Mol Cell Oncol 2021; 8:1877999. [PMID: 33860082 DOI: 10.1080/23723556.2021.1877999] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
In response to chromatin bridges, the chromosomal passenger complex (CPC) delays completion of cytokinesis (abscission) to prevent chromosome breakage. Here, we discuss recent findings from our lab showing that an ATM-CHK2-INCENP pathway imposes the abscission checkpoint in human cells by regulating CPC midbody-localization.
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Affiliation(s)
- Eleni Petsalaki
- Department of Biology, University of Crete, Heraklion, Greece
| | - George Zachos
- Department of Biology, University of Crete, Heraklion, Greece
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15
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Buitrago-Molina LE, Marhenke S, Becker D, Geffers R, Itzel T, Teufel A, Jaeschke H, Lechel A, Unger K, Markovic J, Sharma AD, Marquardt JU, Saborowski M, Saborowski A, Vogel A. p53-Independent Induction of p21 Fails to Control Regeneration and Hepatocarcinogenesis in a Murine Liver Injury Model. Cell Mol Gastroenterol Hepatol 2021; 11:1387-1404. [PMID: 33484913 PMCID: PMC8024980 DOI: 10.1016/j.jcmgh.2021.01.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 01/11/2021] [Accepted: 01/12/2021] [Indexed: 12/14/2022]
Abstract
BACKGROUND & AIMS A coordinated stress and regenerative response is important after hepatocyte damage. Here, we investigate the phenotypes that result from genetic abrogation of individual components of the checkpoint kinase 2/transformation-related protein 53 (p53)/cyclin-dependent kinase inhibitor 1A (p21) pathway in a murine model of metabolic liver injury. METHODS Nitisinone was reduced or withdrawn in Fah-/- mice lacking Chk2, p53, or p21, and survival, tumor development, liver injury, and regeneration were analyzed. Partial hepatectomies were performed and mice were challenged with the Fas antibody Jo2. RESULTS In a model of metabolic liver injury, loss of p53, but not Chk2, impairs the oxidative stress response and aggravates liver damage, indicative of a direct p53-dependent protective effect on hepatocytes. Cell-cycle control during chronic liver injury critically depends on the presence of both p53 and its downstream effector p21. In p53-deficient hepatocytes, unchecked proliferation occurs despite a strong induction of p21, showing a complex interdependency between p21 and p53. The increased regenerative potential in the absence of p53 cannot fully compensate the surplus injury and is not sufficient to promote survival. Despite the distinct phenotypes associated with the loss of individual components of the DNA damage response, gene expression patterns are dominated by the severity of liver injury, but reflect distinct effects of p53 on proliferation and the anti-oxidative stress response. CONCLUSIONS Characteristic phenotypes result from the genetic abrogation of individual components of the DNA damage-response cascade in a liver injury model. The extent to which loss of gene function can be compensated, or affects injury and proliferation, is related to the level at which the cascade is interrupted. Accession numbers of repository for expression microarray data: GSE156983, GSE156263, GSE156852, and GSE156252.
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Affiliation(s)
| | - Silke Marhenke
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
| | - Diana Becker
- First Department of Medicine, University Hospital Schleswig-Holstein, Campus Lübeck, Lübeck, Germany
| | - Robert Geffers
- Department of Cell Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Timo Itzel
- Division of Hepatology, Department of Medicine II, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Andreas Teufel
- Division of Hepatology, Department of Medicine II, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Hartmut Jaeschke
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City, Kansas
| | - André Lechel
- Department of Internal Medicine I, University Hospital Ulm, Ulm, Germany
| | - Kristian Unger
- Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Neuherberg, Germany
| | - Jovana Markovic
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
| | - Amar Deep Sharma
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
| | - Jens U. Marquardt
- First Department of Medicine, University Hospital Schleswig-Holstein, Campus Lübeck, Lübeck, Germany
| | - Michael Saborowski
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
| | - Anna Saborowski
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
| | - Arndt Vogel
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany,Correspondence Address correspondence to: Arndt Vogel, MD, Department of Gastroenterology, Hepatology, and Endocrinology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany. fax: (49) 5115328392.
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16
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Stolarova L, Kleiblova P, Janatova M, Soukupova J, Zemankova P, Macurek L, Kleibl Z. CHEK2 Germline Variants in Cancer Predisposition: Stalemate Rather than Checkmate. Cells 2020; 9:cells9122675. [PMID: 33322746 PMCID: PMC7763663 DOI: 10.3390/cells9122675] [Citation(s) in RCA: 86] [Impact Index Per Article: 21.5] [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: 11/15/2020] [Revised: 12/04/2020] [Accepted: 12/10/2020] [Indexed: 12/15/2022] Open
Abstract
Germline alterations in many genes coding for proteins regulating DNA repair and DNA damage response (DDR) to DNA double-strand breaks (DDSB) have been recognized as pathogenic factors in hereditary cancer predisposition. The ATM-CHEK2-p53 axis has been documented as a backbone for DDR and hypothesized as a barrier against cancer initiation. However, although CHK2 kinase coded by the CHEK2 gene expedites the DDR signal, its function in activation of p53-dependent cell cycle arrest is dispensable. CHEK2 mutations rank among the most frequent germline alterations revealed by germline genetic testing for various hereditary cancer predispositions, but their interpretation is not trivial. From the perspective of interpretation of germline CHEK2 variants, we review the current knowledge related to the structure of the CHEK2 gene, the function of CHK2 kinase, and the clinical significance of CHEK2 germline mutations in patients with hereditary breast, prostate, kidney, thyroid, and colon cancers.
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Affiliation(s)
- Lenka Stolarova
- Institute of Biochemistry and Experimental Oncology, First Faculty of Medicine, Charles University, 12800 Prague, Czech Republic; (L.S.); (M.J.); (J.S.); (P.Z.)
- Laboratory of Cancer Cell Biology, Institute of Molecular Genetics of the Czech Academy of Sciences, 14220 Prague, Czech Republic;
| | - Petra Kleiblova
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital in Prague, 12800 Prague, Czech Republic;
| | - Marketa Janatova
- Institute of Biochemistry and Experimental Oncology, First Faculty of Medicine, Charles University, 12800 Prague, Czech Republic; (L.S.); (M.J.); (J.S.); (P.Z.)
| | - Jana Soukupova
- Institute of Biochemistry and Experimental Oncology, First Faculty of Medicine, Charles University, 12800 Prague, Czech Republic; (L.S.); (M.J.); (J.S.); (P.Z.)
| | - Petra Zemankova
- Institute of Biochemistry and Experimental Oncology, First Faculty of Medicine, Charles University, 12800 Prague, Czech Republic; (L.S.); (M.J.); (J.S.); (P.Z.)
| | - Libor Macurek
- Laboratory of Cancer Cell Biology, Institute of Molecular Genetics of the Czech Academy of Sciences, 14220 Prague, Czech Republic;
| | - Zdenek Kleibl
- Institute of Biochemistry and Experimental Oncology, First Faculty of Medicine, Charles University, 12800 Prague, Czech Republic; (L.S.); (M.J.); (J.S.); (P.Z.)
- Correspondence: ; Tel.: +420-22496-745
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17
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Shapira T, Rankine-Wilson L, Chao JD, Pichler V, Rens C, Pfeifer T, Av-Gay Y. High-Content Screening of Eukaryotic Kinase Inhibitors Identify CHK2 Inhibitor Activity Against Mycobacterium tuberculosis. Front Microbiol 2020; 11:553962. [PMID: 33042061 PMCID: PMC7530171 DOI: 10.3389/fmicb.2020.553962] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 08/21/2020] [Indexed: 12/20/2022] Open
Abstract
A screen of a eukaryotic kinase inhibitor library in an established intracellular infection model identified a set of drug candidates enabling intracellular killing of Mycobacterium tuberculosis (M.tb). Screen validity was confirmed internally by a Z′ = 0.5 and externally by detecting previously reported host-targeting anti-M.tb compounds. Inhibitors of the CHK kinase family, specifically checkpoint kinase 2 (CHK2), showed the highest inhibition and lowest toxicity of all kinase families. The screen identified and validated DDUG, a CHK2 inhibitor, as a novel bactericidal anti-M.tb compound. CHK2 inhibition by RNAi phenocopied the intracellular inhibitory effect of DDUG. DDUG was active intracellularly against M.tb, but not other mycobacteria. DDUG also had extracellular activity against 4 of 12 bacteria tested, including M.tb. Combined, these observations suggest DDUG acts in tandem against both host and pathogen. Importantly, DDUG’s validation highlights the screening and analysis methodology developed for this screen, which identified novel host-directed anti-M.tb compounds.
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Affiliation(s)
- Tirosh Shapira
- Division of Infectious Diseases, Department of Medicine, The University of British Columbia, Vancouver, BC, Canada
| | - Leah Rankine-Wilson
- Department of Microbiology and Immunology, Life Sciences Institute, The University of British Columbia, Vancouver, BC, Canada
| | - Joseph D Chao
- Division of Infectious Diseases, Department of Medicine, The University of British Columbia, Vancouver, BC, Canada
| | - Virginia Pichler
- Department of Microbiology and Immunology, Life Sciences Institute, The University of British Columbia, Vancouver, BC, Canada
| | - Celine Rens
- Department of Microbiology and Immunology, Life Sciences Institute, The University of British Columbia, Vancouver, BC, Canada
| | - Tom Pfeifer
- Department of Microbiology and Immunology, Life Sciences Institute, The University of British Columbia, Vancouver, BC, Canada
| | - Yossef Av-Gay
- Division of Infectious Diseases, Department of Medicine, The University of British Columbia, Vancouver, BC, Canada.,Department of Microbiology and Immunology, Life Sciences Institute, The University of British Columbia, Vancouver, BC, Canada
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18
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Ta HQ, Dworak N, Ivey ML, Roller DG, Gioeli D. AR phosphorylation and CHK2 kinase activity regulates IR-stabilized AR-CHK2 interaction and prostate cancer survival. eLife 2020; 9:51378. [PMID: 32579110 PMCID: PMC7338052 DOI: 10.7554/elife.51378] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 06/22/2020] [Indexed: 12/12/2022] Open
Abstract
We have previously demonstrated that checkpoint kinase 2 (CHK2) is a critical negative regulator of androgen receptor (AR) transcriptional activity, prostate cancer (PCa) cell growth, and androgen sensitivity. We have now uncovered that the AR directly interacts with CHK2 and ionizing radiation (IR) increases this interaction. This IR-induced increase in AR-CHK2 interactions requires AR phosphorylation and CHK2 kinase activity. PCa associated CHK2 mutants with impaired kinase activity reduced IR-induced AR-CHK2 interactions. The destabilization of AR - CHK2 interactions induced by CHK2 variants impairs CHK2 negative regulation of cell growth. CHK2 depletion increases transcription of DNAPK and RAD54, increases clonogenic survival, and increases resolution of DNA double strand breaks. The data support a model where CHK2 sequesters the AR through direct binding decreasing AR transcription and suppressing PCa cell growth. CHK2 mutation or loss of expression thereby leads to increased AR transcriptional activity and survival in response to DNA damage.
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Affiliation(s)
- Huy Q Ta
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, United States
| | - Natalia Dworak
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, United States
| | - Melissa L Ivey
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, United States
| | - Devin G Roller
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, United States
| | - Daniel Gioeli
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, United States.,Cancer Center Member, University of Virginia, Charlottesville, United States
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19
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Abstract
DNA damage response (DDR) pathway prevents high level endogenous and environmental DNA damage being replicated and passed on to the next generation of cells via an orchestrated and integrated network of cell cycle checkpoint signalling and DNA repair pathways. Depending on the type of damage, and where in the cell cycle it occurs different pathways are involved, with the ATM-CHK2-p53 pathway controlling the G1 checkpoint or ATR-CHK1-Wee1 pathway controlling the S and G2/M checkpoints. Loss of G1 checkpoint control is common in cancer through TP53, ATM mutations, Rb loss or cyclin E overexpression, providing a stronger rationale for targeting the S/G2 checkpoints. This review will focus on the ATM-CHK2-p53-p21 pathway and the ATR-CHK1-WEE1 pathway and ongoing efforts to target these pathways for patient benefit.
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20
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Li XH, Li WJ, Ju JQ, Pan MH, Xu Y, Sun MH, Li M, Sun SC. CHK2 is essential for spindle assembly and DNA repair during the first cleavage of mouse embryos. Aging (Albany NY) 2020; 12:10415-10426. [PMID: 32484784 PMCID: PMC7346029 DOI: 10.18632/aging.103267] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 04/20/2020] [Indexed: 11/25/2022]
Abstract
The quality of the early embryo is critical for embryonic development and implantation. Errors during cleavage lead to aneuploidy in embryos. As a cell cycle checkpoint protein, CHK2 participates in DNA replication, cell cycle arrest and spindle assembly. However, the functions of CHK2 in early development of the mouse embryo remain largely unknown. In this study, we show that CHK2 is localized on the spindle in metaphase and mainly accumulates at spindle poles in anaphase/telophase during the first cleavage of the mouse embryo. CHK2 inhibition led to cleavage failure in early embryonic development, accompanied by abnormal spindle assembly and misaligned chromosomes. Moreover, the loss of CHK2 activity increased the level of cellular DNA damage, which resulted in oxidative stress. Then, apoptosis and autophagy were found to be active in these embryos. In summary, our results suggest that CHK2 is an essential regulator of spindle assembly and DNA repair during early embryonic development in mice.
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Affiliation(s)
- Xiao-Han Li
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Wen-Jing Li
- Center for Reproductive Medicine, Peking University Third Hospital, Beijing 100191, China
| | - Jia-Qian Ju
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Meng-Hao Pan
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Yao Xu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Ming-Hong Sun
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Mo Li
- Center for Reproductive Medicine, Peking University Third Hospital, Beijing 100191, China
| | - Shao-Chen Sun
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
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21
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Eichenauer T, Federlein F, Möller K, Chirico V, Kind S, Lennartz M, Lutz F, Hube-Magg C, Höflmayer D, Fisch M, Huland H, Heinzer H, Graefen M, Haese A, Schroeder C, Lebok P, Minner S, Simon R, Sauter G, Schlomm T, Wilczak W, Steurer S, Luebke AM. High CHK2 protein expression is a strong and independent prognostic feature in ERG negative prostate cancer. Pathology 2020; 52:421-430. [PMID: 32317175 DOI: 10.1016/j.pathol.2020.03.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 10/22/2019] [Revised: 03/03/2020] [Accepted: 03/10/2020] [Indexed: 12/13/2022]
Abstract
Checkpoint kinase 2 (CHK2) is a serine-threonine kinase with a role in DNA repair, cell cycle arrest or apoptosis in response to DNA damage. Both reduced and increased CHK2 expression has been described in different tumour types with impact on patient prognosis. To evaluate prevalence and significance of altered CHK2 expression in prostate cancer, a tissue microarray containing 17,747 tumours was analysed by immunohistochemistry. Nuclear CHK2 immunostaining was absent or weak in benign prostate epithelium but often more prominent in cancers. CHK2 immunostaining was considered weak in 38.8%, moderate in 33.6% and strong in 11.2% of prostate cancers. High CHK2 expression was strongly associated with TMPRSS2:ERG fusions (p<0.0001). Subgroup analysis of ERG positive and negative cancers revealed that high CHK2 staining was significantly linked to advanced tumour stage, high Gleason score, positive nodal status, positive surgical margin, high preoperative PSA (p<0.0001 each) and early prostate-specific antigen (PSA) recurrence (p=0.0001) in the subset of ERG negative cancers, while most of these associations were absent in ERG positive cancers. In ERG negative cancers, high CHK2 expression was an independent predictor of patient prognosis, even if parameters were included that were only available postoperatively. High CHK2 expression was also linked to presence of chromosomal deletions, high level of androgen receptor expression, positive p53 immunostaining, and high Ki-67 labelling index. These provide further in vivo evidence for previously described functional interactions. In summary, high CHK2 expression is linked to adverse tumour features and independently predicts early biochemical recurrence in ERG negative prostate cancer. CHK2 measurement, either alone or in combination, might be of clinical utility in this prostate cancer subgroup.
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Affiliation(s)
- Till Eichenauer
- Department of Urology, University Medical Center Hamburg-Eppendorf, Germany
| | - Felix Federlein
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Germany
| | - Katharina Möller
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Germany
| | - Viktoria Chirico
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Germany
| | - Simon Kind
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Germany
| | - Maximilian Lennartz
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Germany
| | - Florian Lutz
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Germany
| | - Claudia Hube-Magg
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Germany
| | - Doris Höflmayer
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Germany
| | - Margit Fisch
- Department of Urology, University Medical Center Hamburg-Eppendorf, Germany
| | - Hartwig Huland
- Martini-Clinic, Prostate Cancer Center, University Medical Center Hamburg-Eppendorf, Germany
| | - Hans Heinzer
- Martini-Clinic, Prostate Cancer Center, University Medical Center Hamburg-Eppendorf, Germany
| | - Markus Graefen
- Martini-Clinic, Prostate Cancer Center, University Medical Center Hamburg-Eppendorf, Germany
| | - Alexander Haese
- Martini-Clinic, Prostate Cancer Center, University Medical Center Hamburg-Eppendorf, Germany
| | - Cornelia Schroeder
- Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, Germany
| | - Patrick Lebok
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Germany
| | - Sarah Minner
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Germany
| | - Ronald Simon
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Germany.
| | - Guido Sauter
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Germany
| | - Thorsten Schlomm
- Department of Urology, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Waldemar Wilczak
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Germany
| | - Stefan Steurer
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Germany
| | - Andreas M Luebke
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Germany
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22
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Guo QQ, Wang SS, Zhang SS, Xu HD, Li XM, Guan Y, Yi F, Zhou TT, Jiang B, Bai N, Ma MT, Wang Z, Feng YL, Guo WD, Wu X, Zhao GF, Fan GJ, Zhang SP, Wang CG, Cao LY, O'Rourke BP, Liu SH, Wang PY, Han S, Song XY, Cao L. ATM- CHK2-Beclin 1 axis promotes autophagy to maintain ROS homeostasis under oxidative stress. EMBO J 2020; 39:e103111. [PMID: 32187724 DOI: 10.15252/embj.2019103111] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 02/27/2020] [Accepted: 03/02/2020] [Indexed: 11/09/2022] Open
Abstract
The homeostatic link between oxidative stress and autophagy plays an important role in cellular responses to a wide variety of physiological and pathological conditions. However, the regulatory pathway and outcomes remain incompletely understood. Here, we show that reactive oxygen species (ROS) function as signaling molecules that regulate autophagy through ataxia-telangiectasia mutated (ATM) and cell cycle checkpoint kinase 2 (CHK2), a DNA damage response (DDR) pathway activated during metabolic and hypoxic stress. We report that CHK2 binds to and phosphorylates Beclin 1 at Ser90/Ser93, thereby impairing Beclin 1-Bcl-2 autophagy-regulatory complex formation in a ROS-dependent fashion. We further demonstrate that CHK2-mediated autophagy has an unexpected role in reducing ROS levels via the removal of damaged mitochondria, which is required for cell survival under stress conditions. Finally, CHK2-/- mice display aggravated infarct phenotypes and reduced Beclin 1 p-Ser90/Ser93 in a cerebral stroke model, suggesting an in vivo role of CHK2-induced autophagy in cell survival. Taken together, these results indicate that the ROS-ATM-CHK2-Beclin 1-autophagy axis serves as a physiological adaptation pathway that protects cells exposed to pathological conditions from stress-induced tissue damage.
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Affiliation(s)
- Qi-Qiang Guo
- Institute of Translational Medicine, Key Laboratory of Cell Biology of Ministry of Public Health, Key Laboratory of Medical Cell Biology of Ministry of Education, Liaoning Province Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, China Medical University, Shenyang, China
| | - Shan-Shan Wang
- Institute of Translational Medicine, Key Laboratory of Cell Biology of Ministry of Public Health, Key Laboratory of Medical Cell Biology of Ministry of Education, Liaoning Province Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, China Medical University, Shenyang, China
| | - Shan-Shan Zhang
- Institute of Translational Medicine, Key Laboratory of Cell Biology of Ministry of Public Health, Key Laboratory of Medical Cell Biology of Ministry of Education, Liaoning Province Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, China Medical University, Shenyang, China
| | - Hong-De Xu
- Institute of Translational Medicine, Key Laboratory of Cell Biology of Ministry of Public Health, Key Laboratory of Medical Cell Biology of Ministry of Education, Liaoning Province Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, China Medical University, Shenyang, China
| | - Xiao-Man Li
- Institute of Translational Medicine, Key Laboratory of Cell Biology of Ministry of Public Health, Key Laboratory of Medical Cell Biology of Ministry of Education, Liaoning Province Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, China Medical University, Shenyang, China
| | - Yi Guan
- Institute of Translational Medicine, Key Laboratory of Cell Biology of Ministry of Public Health, Key Laboratory of Medical Cell Biology of Ministry of Education, Liaoning Province Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, China Medical University, Shenyang, China
| | - Fei Yi
- Institute of Translational Medicine, Key Laboratory of Cell Biology of Ministry of Public Health, Key Laboratory of Medical Cell Biology of Ministry of Education, Liaoning Province Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, China Medical University, Shenyang, China
| | - Ting-Ting Zhou
- Institute of Translational Medicine, Key Laboratory of Cell Biology of Ministry of Public Health, Key Laboratory of Medical Cell Biology of Ministry of Education, Liaoning Province Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, China Medical University, Shenyang, China
| | - Bo Jiang
- Institute of Translational Medicine, Key Laboratory of Cell Biology of Ministry of Public Health, Key Laboratory of Medical Cell Biology of Ministry of Education, Liaoning Province Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, China Medical University, Shenyang, China
| | - Ning Bai
- Institute of Translational Medicine, Key Laboratory of Cell Biology of Ministry of Public Health, Key Laboratory of Medical Cell Biology of Ministry of Education, Liaoning Province Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, China Medical University, Shenyang, China
| | - Meng-Tao Ma
- Institute of Translational Medicine, Key Laboratory of Cell Biology of Ministry of Public Health, Key Laboratory of Medical Cell Biology of Ministry of Education, Liaoning Province Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, China Medical University, Shenyang, China
| | - Zhuo Wang
- Institute of Translational Medicine, Key Laboratory of Cell Biology of Ministry of Public Health, Key Laboratory of Medical Cell Biology of Ministry of Education, Liaoning Province Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, China Medical University, Shenyang, China
| | - Yan-Ling Feng
- Institute of Translational Medicine, Key Laboratory of Cell Biology of Ministry of Public Health, Key Laboratory of Medical Cell Biology of Ministry of Education, Liaoning Province Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, China Medical University, Shenyang, China
| | - Wen-Dong Guo
- Institute of Translational Medicine, Key Laboratory of Cell Biology of Ministry of Public Health, Key Laboratory of Medical Cell Biology of Ministry of Education, Liaoning Province Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, China Medical University, Shenyang, China
| | - Xuan Wu
- Institute of Translational Medicine, Key Laboratory of Cell Biology of Ministry of Public Health, Key Laboratory of Medical Cell Biology of Ministry of Education, Liaoning Province Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, China Medical University, Shenyang, China
| | - Gui-Feng Zhao
- Department of Experimental Oncology and Animal Center, Key Laboratory of Research and Application of Animal Models for Environmental and Metabolic Diseases, Shengjing Hospital of China Medical University, Shenyang, China
| | - Guang-Jian Fan
- Institute of Translational Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Sheng-Ping Zhang
- Institute of Translational Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chuan-Gui Wang
- Institute of Translational Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Long-Yue Cao
- Wilf Family Cardiovascular Research Institute, Department of Medicine (Cardiology), Albert Einstein College of Medicine, Bronx, NY, USA
| | - Brian P O'Rourke
- Department of Physiology and Biophysics, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Shi-Hui Liu
- Aging Institute, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Ping-Yuan Wang
- Cardiovascular Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Shuai Han
- Department of Neurosurgery, The First Hospital of China medical University, Shenyang, China
| | - Xiao-Yu Song
- Institute of Translational Medicine, Key Laboratory of Cell Biology of Ministry of Public Health, Key Laboratory of Medical Cell Biology of Ministry of Education, Liaoning Province Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, China Medical University, Shenyang, China
| | - Liu Cao
- Institute of Translational Medicine, Key Laboratory of Cell Biology of Ministry of Public Health, Key Laboratory of Medical Cell Biology of Ministry of Education, Liaoning Province Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, China Medical University, Shenyang, China
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23
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Seelinger M, Søgaard CK, Otterlei M. The Human RAD5 Homologs, HLTF and SHPRH, Have Separate Functions in DNA Damage Tolerance Dependent on The DNA Lesion Type. Biomolecules 2020; 10:biom10030463. [PMID: 32192191 PMCID: PMC7175315 DOI: 10.3390/biom10030463] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 02/10/2020] [Revised: 03/13/2020] [Accepted: 03/14/2020] [Indexed: 12/18/2022] Open
Abstract
Helicase-like transcription factor (HLTF) and SNF2, histone-linker, PHD and RING finger domain-containing helicase (SHPRH), the two human homologs of yeast Rad5, are believed to have a vital role in DNA damage tolerance (DDT). Here we show that HLTF, SHPRH and HLTF/SHPRH knockout cell lines show different sensitivities towards UV-irradiation, methyl methanesulfonate (MMS), cisplatin and mitomycin C (MMC), which are drugs that induce different types of DNA lesions. In general, the HLTF/SHPRH double knockout cell line was less sensitive than the single knockouts in response to all drugs, and interestingly, especially to MMS and cisplatin. Using the SupF assay, we detected an increase in the mutation frequency in HLTF knockout cells both after UV- and MMS-induced DNA lesions, while we detected a decrease in mutation frequency over UV lesions in the HLTF/SHPRH double knockout cells. No change in the mutation frequency was detected in the HLTF/SHPRH double knockout cell line after MMS treatment, even though these cells were more resistant to MMS and grew faster than the other cell lines after treatment with DNA damaging agents. This phenotype could possibly be explained by a reduced activation of checkpoint kinase 2 (CHK2) and MCM2 (a component of the pre-replication complex) after MMS treatment in cells lacking SHPRH. Our data reveal both distinct and common roles of the human RAD5 homologs dependent on the nature of DNA lesions, and identified SHPRH as a regulator of CHK2, a central player in DNA damage response.
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24
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Angius G, Tomao S, Stati V, Vici P, Bianco V, Tomao F. Prexasertib, a checkpoint kinase inhibitor: from preclinical data to clinical development. Cancer Chemother Pharmacol 2020; 85:9-20. [PMID: 31512029 DOI: 10.1007/s00280-019-03950-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 08/29/2019] [Indexed: 12/21/2022]
Abstract
Checkpoint kinases 1 and 2 (CHK1 and CHK2) are important multifunctional proteins of the kinase family. Their main function is to regulate DNA replication and DNA damage response. If a cell is exposed to exogenous damage to its DNA, CHK1/CHK2 stops the cell cycle to give time to the cellular mechanisms to repair DNA breakage and apoptosis too, if the damage is not repairable to activate programmed cell death. CHK1/CHK2 plays a crucial role in the repair of recombination-mediated double-stranded DNA breaks. The other important functions performed by these proteins are the beginning of DNA replication, the stabilization of replication forks, the resolution of replication stress and the coordination of mitosis, even in the absence of exogenous DNA damage. Prexasertib (LY2606368) is a small ATP-competitive selective inhibitor of CHK1 and CHK2. In preclinical studies, prexasertib in monotherapy has shown to induce DNA damage and tumor cells apoptosis. The preclinical data and early clinical studies advocate the use of prexasertib in solid tumors both in monotherapy and in combination with other drugs (antimetabolites, PARP inhibitors and platinum-based chemotherapy). The safety and the efficacy of combination therapies with prexasertib need to be better evaluated in ongoing clinical trials.
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25
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Ivy SP, Kunos CA, Arnaldez FI, Kohn EC. Defining and targeting wild-type BRCA high-grade serous ovarian cancer: DNA repair and cell cycle checkpoints. Expert Opin Investig Drugs 2019; 28:771-785. [PMID: 31449760 DOI: 10.1080/13543784.2019.1657403] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Introduction: Molecular analyzes including molecular descriptor/phenotype interactions have led to better characterization of epithelial ovarian cancer patients, including a definition of a BRCA wild-type (BRCAwt) phenotype. Understanding how and when to use agents targeted against dependent BRCAwt pathways or other molecular events at disease progression is an important translational and therapeutic direction in ovarian cancer research. Areas covered: In this overview, we provide definitions and descriptions of a BRCAwt genotype and phenotype. We discuss novel investigational drugs that hold promise for the treatment of BRCAwt ovarian cancer, including inhibitors of poly(ADP-ribose) polymerase, ribonucleotide reductase, DNA protein kinase-catalytic subunit, ataxia-telangiectasia-mutated kinase (ATM), ataxia-telangiectasia mutated and Rad3-related kinase (ATR), CHK 1/2, cyclin kinases, glutaminase-1, WEE1 kinase, as well as tumor microenvironment and angiogenesis inhibitors. This article explores the known and the emerging areas of clinical research on patients with BRCAwt ovarian cancer. Expert opinion: Discovery of molecular changes tied to annotated disease information, along with an expanding array of pathway targets and targeted therapeutic agents, creates optimism and opportunity for women with ovarian cancer. Using precision oncology approaches, clinical researchers are, and will be, poised to select more effective treatments for ovarian cancer patients.
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Affiliation(s)
- S Percy Ivy
- Cancer Therapy Evaluation Program, National Cancer Institute (NCI) , Bethesda , MD , USA
| | - Charles A Kunos
- Cancer Therapy Evaluation Program, National Cancer Institute (NCI) , Bethesda , MD , USA
| | - Fernanda I Arnaldez
- Cancer Therapy Evaluation Program, National Cancer Institute (NCI) , Bethesda , MD , USA
| | - Elise C Kohn
- Cancer Therapy Evaluation Program, National Cancer Institute (NCI) , Bethesda , MD , USA
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26
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Wu JH, Narayanan D, Limmer AL, Simonette RA, Rady PL, Tyring SK. Merkel Cell Polyomavirus Small T Antigen Induces DNA Damage Response. Intervirology 2019; 62:96-100. [PMID: 31401636 DOI: 10.1159/000501419] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 05/19/2019] [Indexed: 11/19/2022] Open
Abstract
Merkel cell carcinoma (MCC) is an aggressive neuroendocrine cancer of the skin with high rates of metastasis and mortality. Besides well-established factors including genetic mutations and UV-induced DNA damage in Merkel cell carcinogenesis, the recent discovery of the Merkel cell polyomavirus (MCPyV) has shed light on the viral etiology of MCC. In the current study, we provide novel evidence that MCPyV small T (sT) antigen induces the DNA damage response (DDR) pathway. Our data show that in human MCC cells, the presence of MCPyV is associated with hyperphosphorylation of histone H2AX, a marker for DNA damage. We observed that overexpression of MCPyV sT antigen induced the phosphorylation of histone H2AX as well as the activation of ataxia telangiectasia mutant (ATM), an upstream kinase important for H2AX phosphorylation. Moreover, we observed that MCPyV sT expression also induced the hyperphosphorylation of other ATM downstream molecules (including 53BP1 and CHK2) as well as the hypermethylation of histone 3 and histone 4. These findings disclose a novel link between MCPyV sT and the DDR pathway in MCC. Given that measurement of DDR is clinically useful for evaluating treatment response to radio- and chemotherapy, our findings warrant further investigation to evaluate the potential implications of this pathway for MCC management.
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Affiliation(s)
- Julie H Wu
- Department of Dermatology, McGovern Medical School at University of Texas Health Science Center, Houston, Texas, USA.,Baylor College of Medicine, Houston, Texas, USA
| | - Deepika Narayanan
- Department of Dermatology, McGovern Medical School at University of Texas Health Science Center, Houston, Texas, USA.,Rice University, Houston, Texas, USA
| | - Allison L Limmer
- Department of Dermatology, McGovern Medical School at University of Texas Health Science Center, Houston, Texas, USA
| | - Rebecca A Simonette
- Department of Dermatology, McGovern Medical School at University of Texas Health Science Center, Houston, Texas, USA
| | - Peter L Rady
- Department of Dermatology, McGovern Medical School at University of Texas Health Science Center, Houston, Texas, USA
| | - Stephen K Tyring
- Department of Dermatology, McGovern Medical School at University of Texas Health Science Center, Houston, Texas, USA,
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27
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Wu J, Chen Y, Geng G, Li L, Yin P, Nowsheen S, Li Y, Wu C, Liu J, Zhao F, Kim W, Zhou Q, Huang J, Guo G, Zhang C, Tu X, Gao X, Lou Z, Luo K, Qiao H, Yuan J. USP39 regulates DNA damage response and chemo-radiation resistance by deubiquitinating and stabilizing CHK2. Cancer Lett 2019; 449:114-24. [PMID: 30771428 DOI: 10.1016/j.canlet.2019.02.015] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 02/07/2019] [Accepted: 02/10/2019] [Indexed: 11/23/2022]
Abstract
The serine/threonine kinase, CHK2 (checkpoint kinase 2), is a key mediator in DNA damage response and a tumor suppressor, which is implicated in promoting cell cycle arrest, apoptosis and DNA repair. Accumulating evidence suggests that these functions are primarily exerted through phosphorylation downstream factors such as p53 and BRCA1. Recent studies have shown that ubiquitination is an important mode of regulation of CHK2. However, it remains largely unclear whether deubiquitinases participate in regulation of CHK2. Here, we report that a deubiquitinase, USP39, is a new regulator of CHK2. Mechanistically, USP39 deubiquitinates and stabilizes CHK2, which in turn enhances CHK2 stability. Short hairpin RNA (shRNA) mediated knockdown of USP39 led to deregulate CHK2, which resulted in compromising the DNA damage-induced G2/M checkpoint, decreasing apoptosis, and conferring cancer cells resistance to chemotherapy drugs and radiation treatment. Collectively, we identify USP39 as a novel regulator of CHK2 in the DNA damage response.
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28
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Liu W, Chen J, Tamayo AT, Ruan C, Li L, Zhou S, Shen C, Young KH, Westin J, Davis RE, Hu S, Medeiros LJ, Ford RJ, Pham LV. Preclinical efficacy and biological effects of the oral proteasome inhibitor ixazomib in diffuse large B-cell lymphoma. Oncotarget 2017; 9:346-360. [PMID: 29416618 PMCID: PMC5787470 DOI: 10.18632/oncotarget.20378] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 08/08/2017] [Indexed: 01/01/2023] Open
Abstract
Despite advances in deciphering the molecular pathogenesis of diffuse large B-cell lymphoma (DLBCL), patients with relapsed/refractory disease, particularly those with adverse genetic features (e.g., mutated p53 or double hit lymphoma (DHL)) have very poor prognoses, and effective therapies are lacking. In this study we examined the preclinical efficacy and associated biological effects of the first oral proteasome inhibitor, ixazomib, in DLBCL in vitro and in vivo models. We demonstrated that ixazomib exhibited anti-tumor activities in 28 representative DLBCL cell lines, 10 primary DLBCL samples, and a DHL xenotransplant mouse model, at clinically achievable drug concentrations. Ixazomib sensitivity in DLBCL cells is correlated with immunoproteasomal activity; stimulating lymphoma cells with interferon gamma induced immunoproteasome activity and sensitized these cells to ixazomib. In addition, we showed that ixazomib induces apoptosis and the DNA damage response pathway, through activation of the checkpoint kinase 2 (CHK2). Hence, pharmacological inhibition of CHK2 enhances the anti-tumor activity of ixazomib in DLBCL cells. Our results indicate that ixazomib is an effective proteasome inhibitor active in DLBCL, including DHL, and its combination with a CHK2 inhibitor offers a potentially more robust therapeutic regimen for treatment-resistant DLBCL.
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Affiliation(s)
- Wei Liu
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States.,Department of Pathology, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Juan Chen
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Archito T Tamayo
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Changgeng Ruan
- Department of Pathology, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Li Li
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Shouhao Zhou
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Chan Shen
- Department of Health Services Research, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Ken H Young
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Jason Westin
- Department of Lymphoma and Myeloma, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Richard E Davis
- Department of Lymphoma and Myeloma, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Shimin Hu
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Leonard J Medeiros
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Richard J Ford
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Lan V Pham
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
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29
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Ma X, Han Y, Song X, Do T, Yang Z, Ni J, Xie T. DNA damage-induced Lok/ CHK2 activation compromises germline stem cell self-renewal and lineage differentiation. Development 2016; 143:4312-4323. [PMID: 27729408 DOI: 10.1242/dev.141069] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 09/20/2016] [Indexed: 12/21/2022]
Abstract
Stem cells in adult tissues are constantly exposed to genotoxic stress and also accumulate DNA damage with age. However, it remains largely unknown how DNA damage affects both stem cell self-renewal and differentiation. In this study, we show that DNA damage retards germline stem cell (GSC) self-renewal and progeny differentiation in a Lok kinase-dependent manner in the Drosophila ovary. Both heatshock-inducible endonuclease I-CreI expression and X-ray irradiation can efficiently introduce double-strand breaks in GSCs and their progeny, resulting in a rapid GSC loss and a GSC progeny differentiation defect. Surprisingly, the elimination of Lok or its kinase activity can almost fully rescue the GSC loss and the progeny differentiation defect caused by DNA damage induced by I-CreI or X-ray. In addition, the reduction in bone morphogenetic protein signaling and Shotgun expression only makes a limited contribution to DNA damage-induced GSC loss. Finally, DNA damage also decreases the expression of the master differentiation factor Bam in a Lok-dependent manner, which helps explain the GSC progeny differentiation defect. Therefore, this study demonstrates, for the first time in vivo, that Lok kinase activation is required for the DNA damage-mediated disruption of adult stem cell self-renewal and lineage differentiation, and might also offer novel insight into how DNA damage causes tissue aging and cancer formation.
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Affiliation(s)
- Xing Ma
- Stowers Institute for Medical Research, 1000 East 50th Street, Kansas City, MO 64110, USA.,Department of Cell Biology and Anatomy, University of Kansas Medical Center, Kansas City, KS 66160, USA
| | - Yingying Han
- Stowers Institute for Medical Research, 1000 East 50th Street, Kansas City, MO 64110, USA
| | - Xiaoqing Song
- Stowers Institute for Medical Research, 1000 East 50th Street, Kansas City, MO 64110, USA
| | - Trieu Do
- Stowers Institute for Medical Research, 1000 East 50th Street, Kansas City, MO 64110, USA
| | - Zhihao Yang
- Tsinghua University School of Medicine, Beijing 100084, China
| | - Jianquan Ni
- Tsinghua University School of Medicine, Beijing 100084, China
| | - Ting Xie
- Stowers Institute for Medical Research, 1000 East 50th Street, Kansas City, MO 64110, USA .,Department of Cell Biology and Anatomy, University of Kansas Medical Center, Kansas City, KS 66160, USA
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30
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Muranen TA, Blomqvist C, Dörk T, Jakubowska A, Heikkilä P, Fagerholm R, Greco D, Aittomäki K, Bojesen SE, Shah M, Dunning AM, Rhenius V, Hall P, Czene K, Brand JS, Darabi H, Chang-Claude J, Rudolph A, Nordestgaard BG, Couch FJ, Hart SN, Figueroa J, García-Closas M, Fasching PA, Beckmann MW, Li J, Liu J, Andrulis IL, Winqvist R, Pylkäs K, Mannermaa A, Kataja V, Lindblom A, Margolin S, Lubinski J, Dubrowinskaja N, Bolla MK, Dennis J, Michailidou K, Wang Q, Easton DF, Pharoah PDP, Schmidt MK, Nevanlinna H. Patient survival and tumor characteristics associated with CHEK2:p.I157T - findings from the Breast Cancer Association Consortium. Breast Cancer Res 2016; 18:98. [PMID: 27716369 PMCID: PMC5048645 DOI: 10.1186/s13058-016-0758-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [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: 04/01/2016] [Accepted: 09/15/2016] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND P.I157T is a CHEK2 missense mutation associated with a modest increase in breast cancer risk. Previously, another CHEK2 mutation, the protein truncating c.1100delC has been associated with poor prognosis of breast cancer patients. Here, we have investigated patient survival and characteristics of breast tumors of germ line p.I157T carriers. METHODS We included in the analyses 26,801 European female breast cancer patients from 15 studies participating in the Breast Cancer Association Consortium. We analyzed the association between p.I157T and the clinico-pathological breast cancer characteristics by comparing the p.I157T carrier tumors to non-carrier and c.1100delC carrier tumors. Similarly, we investigated the p.I157T associated risk of early death, breast cancer-associated death, distant metastasis, locoregional relapse and second breast cancer using Cox proportional hazards models. Additionally, we explored the p.I157T-associated genomic gene expression profile using data from breast tumors of 183 Finnish female breast cancer patients (ten p.I157T carriers) (GEO: GSE24450). Differential gene expression analysis was performed using a moderated t test. Functional enrichment was investigated using the DAVID functional annotation tool and gene set enrichment analysis (GSEA). The tumors were classified into molecular subtypes according to the St Gallen 2013 criteria and the PAM50 gene expression signature. RESULTS P.I157T was not associated with increased risk of early death, breast cancer-associated death or distant metastasis relapse, and there was a significant difference in prognosis associated with the two CHEK2 mutations, p.I157T and c.1100delC. Furthermore, p.I157T was associated with lobular histological type and clinico-pathological markers of good prognosis, such as ER and PR expression, low TP53 expression and low grade. Gene expression analysis suggested luminal A to be the most common subtype for p.I157T carriers and CDH1 (cadherin 1) target genes to be significantly enriched among genes, whose expression differed between p.I157T and non-carrier tumors. CONCLUSIONS Our analyses suggest that there are fundamental differences in breast tumors of CHEK2:p.I157T and c.1100delC carriers. The poor prognosis associated with c.1100delC cannot be generalized to other CHEK2 mutations.
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Affiliation(s)
- Taru A. Muranen
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, P.O. Box 700, 00029 HUS Helsinki, Finland
| | - Carl Blomqvist
- Department of Oncology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Thilo Dörk
- Gynaecology Research Unit, Hannover Medical School, Hannover, Germany
| | - Anna Jakubowska
- Department of Genetics and Pathology, Pomeranian Medical University, Szczecin, Poland
| | - Päivi Heikkilä
- Department of Pathology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Rainer Fagerholm
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, P.O. Box 700, 00029 HUS Helsinki, Finland
| | - Dario Greco
- Unit of Systems Toxicology, Finnish Institute of Occupational Health, Helsinki, Finland
| | - Kristiina Aittomäki
- Department of Clinical Genetics, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Stig E. Bojesen
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Copenhagen General Population Study, Herlev Hospital, Copenhagen University Hospital, Herlev, Denmark
- Department of Clinical Biochemistry, Herlev Hospital, Copenhagen University Hospital, Herlev, Denmark
| | - Mitul Shah
- Centre for Cancer Genetic Epidemiology, Department of Oncology, University of Cambridge, Cambridge, UK
| | - Alison M. Dunning
- Centre for Cancer Genetic Epidemiology, Department of Oncology, University of Cambridge, Cambridge, UK
| | - Valerie Rhenius
- Centre for Cancer Genetic Epidemiology, Department of Oncology, University of Cambridge, Cambridge, UK
| | - Per Hall
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Kamila Czene
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Judith S. Brand
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Hatef Darabi
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Jenny Chang-Claude
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Anja Rudolph
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Børge G. Nordestgaard
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Department of Clinical Biochemistry, Herlev Hospital, Copenhagen University Hospital, Herlev, Denmark
| | - Fergus J. Couch
- Department of Laboratory Medicine and Pathology Mayo Clinic, Rochester, MN USA
| | - Steven N. Hart
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN USA
| | - Jonine Figueroa
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD USA
| | - Montserrat García-Closas
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD USA
- Division of Genetics and Epidemiology, The Institute of Cancer Research, London, UK
| | - Peter A. Fasching
- Department of Gynaecology and Obstetrics, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
- Department of Medicine, Division of Hematology and Oncology, David Geffen School of Medicine, University of California at Los Angeles, Los Angeles, CA USA
| | - Matthias W. Beckmann
- Department of Gynaecology and Obstetrics, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - Jingmei Li
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Jianjun Liu
- Human Genetics Division, Genome Institute of Singapore, Singapore, Singapore
| | - Irene L. Andrulis
- Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, ON Canada
- Department of Molecular Genetics, University of Toronto, Toronto, ON Canada
| | - Robert Winqvist
- Laboratory of Cancer Genetics and Tumor Biology, Northern Finland Laboratory Centre NordLab, Oulu, Finland
- Laboratory of Cancer Genetics and Tumor Biology, Cancer and Translational Medicine Research Unit and Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Katri Pylkäs
- Laboratory of Cancer Genetics and Tumor Biology, Northern Finland Laboratory Centre NordLab, Oulu, Finland
- Laboratory of Cancer Genetics and Tumor Biology, Cancer and Translational Medicine Research Unit and Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Arto Mannermaa
- Cancer Center, Kuopio University Hospital, Kuopio, Finland
- Imaging Center, Department of Clinical Pathology, Kuopio University Hospital, Kuopio, Finland
- Institute of Clinical Medicine, Pathology and Forensic Medicine, University of Eastern Finland, Kuopio, Finland
| | - Vesa Kataja
- Cancer Center, Kuopio University Hospital, Kuopio, Finland
- Central Finland Hospital District, Jyväskylä Central Hospital, Jyväskylä, Finland
| | - Annika Lindblom
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Sara Margolin
- Department of Oncology - Pathology, Karolinska Institutet, Stockholm, Sweden
| | - Jan Lubinski
- Department of Genetics and Pathology, Pomeranian Medical University, Szczecin, Poland
| | | | - Manjeet K. Bolla
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Joe Dennis
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Kyriaki Michailidou
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
- Department of Electron Microscopy/Molecular Pathology, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - Qin Wang
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Douglas F. Easton
- Centre for Cancer Genetic Epidemiology, Department of Oncology, University of Cambridge, Cambridge, UK
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Paul D. P. Pharoah
- Centre for Cancer Genetic Epidemiology, Department of Oncology, University of Cambridge, Cambridge, UK
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Marjanka K. Schmidt
- Netherlands Cancer Institute, Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
| | - Heli Nevanlinna
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, P.O. Box 700, 00029 HUS Helsinki, Finland
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Derenzini E, Agostinelli C, Imbrogno E, Iacobucci I, Casadei B, Brighenti E, Righi S, Fuligni F, Ghelli Luserna Di Rorà A, Ferrari A, Martinelli G, Pileri S, Zinzani PL. Constitutive activation of the DNA damage response pathway as a novel therapeutic target in diffuse large B-cell lymphoma. Oncotarget 2016; 6:6553-69. [PMID: 25544753 PMCID: PMC4466634 DOI: 10.18632/oncotarget.2720] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Accepted: 11/08/2014] [Indexed: 11/25/2022] Open
Abstract
The recent finding that MYC-driven cancers are sensitive to inhibition of the DNA damage response (DDR) pathway, prompted us to investigate the role of DDR pathway as therapeutic target in diffuse large B-cell lymphoma (DLBCL), which frequently overexpresses the MYC oncogene. In a preliminary immunohistochemical study conducted on 99 consecutive DLBCL patients, we found that about half of DLBCLs showed constitutive expression of the phosphorylated forms of checkpoint kinases (CHK) and CDC25c, markers of DDR activation, and of phosphorylated histone H2AX (γH2AX), marker of DNA damage and genomic instability. Constitutive γH2AX expression correlated with c-MYC levels and DDR activation, and defined a subset of tumors characterised by poor outcome. Next, we used the CHK inhibitor PF-0477736 as a tool to investigate whether the inhibition of the DDR pathway might represent a novel therapeutic approach in DLBCL. Submicromolar concentrations of PF-0477736 hindered proliferation in DLBCL cell lines with activated DDR pathway. These results were fully recapitulated with a different CHK inhibitor (AZD-7762). Inhibition of checkpoint kinases induced rapid DNA damage accumulation and apoptosis in DLBCL cell lines and primary cells. These data suggest that pharmacologic inhibition of DDR through targeting of CHK kinases may represent a novel therapeutic strategy in DLBCL.
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Affiliation(s)
- Enrico Derenzini
- Institute of Hematology and Medical Oncology L.A. Seragnoli, Department of Experimental, Diagnostic and Specialty Medicine - DIMES, University of Bologna, Italy
| | - Claudio Agostinelli
- Haematopathology Unit, Department of Experimental, Diagnostic and Specialty Medicine - DIMES, University of Bologna, Italy
| | - Enrica Imbrogno
- Institute of Hematology and Medical Oncology L.A. Seragnoli, Department of Experimental, Diagnostic and Specialty Medicine - DIMES, University of Bologna, Italy
| | - Ilaria Iacobucci
- Institute of Hematology and Medical Oncology L.A. Seragnoli, Department of Experimental, Diagnostic and Specialty Medicine - DIMES, University of Bologna, Italy
| | - Beatrice Casadei
- Institute of Hematology and Medical Oncology L.A. Seragnoli, Department of Experimental, Diagnostic and Specialty Medicine - DIMES, University of Bologna, Italy
| | - Elisa Brighenti
- Institute of Hematology and Medical Oncology L.A. Seragnoli, Department of Experimental, Diagnostic and Specialty Medicine - DIMES, University of Bologna, Italy
| | - Simona Righi
- Haematopathology Unit, Department of Experimental, Diagnostic and Specialty Medicine - DIMES, University of Bologna, Italy
| | - Fabio Fuligni
- Haematopathology Unit, Department of Experimental, Diagnostic and Specialty Medicine - DIMES, University of Bologna, Italy
| | - Andrea Ghelli Luserna Di Rorà
- Institute of Hematology and Medical Oncology L.A. Seragnoli, Department of Experimental, Diagnostic and Specialty Medicine - DIMES, University of Bologna, Italy
| | - Anna Ferrari
- Institute of Hematology and Medical Oncology L.A. Seragnoli, Department of Experimental, Diagnostic and Specialty Medicine - DIMES, University of Bologna, Italy
| | - Giovanni Martinelli
- Institute of Hematology and Medical Oncology L.A. Seragnoli, Department of Experimental, Diagnostic and Specialty Medicine - DIMES, University of Bologna, Italy
| | - Stefano Pileri
- Haematopathology Unit, Department of Experimental, Diagnostic and Specialty Medicine - DIMES, University of Bologna, Italy
| | - Pier Luigi Zinzani
- Institute of Hematology and Medical Oncology L.A. Seragnoli, Department of Experimental, Diagnostic and Specialty Medicine - DIMES, University of Bologna, Italy
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32
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Velic D, Couturier AM, Ferreira MT, Rodrigue A, Poirier GG, Fleury F, Masson JY. DNA Damage Signalling and Repair Inhibitors: The Long-Sought-After Achilles' Heel of Cancer. Biomolecules 2015; 5:3204-59. [PMID: 26610585 DOI: 10.3390/biom5043204] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 11/09/2015] [Indexed: 12/16/2022] Open
Abstract
For decades, radiotherapy and chemotherapy were the two only approaches exploiting DNA repair processes to fight against cancer. Nowadays, cancer therapeutics can be a major challenge when it comes to seeking personalized targeted medicine that is both effective and selective to the malignancy. Over the last decade, the discovery of new targeted therapies against DNA damage signalling and repair has offered the possibility of therapeutic improvements in oncology. In this review, we summarize the current knowledge of DNA damage signalling and repair inhibitors, their molecular and cellular effects, and future therapeutic use.
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33
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Siołek M, Cybulski C, Gąsior-Perczak D, Kowalik A, Kozak-Klonowska B, Kowalska A, Chłopek M, Kluźniak W, Wokołorczyk D, Pałyga I, Walczyk A, Lizis-Kolus K, Sun P, Lubiński J, Narod SA, Góźdż S. CHEK2 mutations and the risk of papillary thyroid cancer. Int J Cancer 2015; 137:548-52. [PMID: 25583358 DOI: 10.1002/ijc.29426] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Accepted: 12/17/2014] [Indexed: 12/16/2022]
Abstract
Mutations in the cell cycle checkpoint kinase 2 (CHEK2) tumor suppressor gene are associated with multi-organ cancer susceptibility including cancers of the breast and prostate. A genetic association between thyroid and breast cancer has been suggested, however little is known about the determinants of this association. To characterize the association of CHEK2 mutations with thyroid cancer, we genotyped 468 unselected patients with papillary thyroid cancer and 468 (matched) cancer-free controls for four founder mutations of CHEK2 (1100delC, IVS2 + 1G>A, del5395 and I157T). We compared the family histories reported by patients with a CHEK2 mutation to those of non-carriers. A CHEK2 mutation was seen in 73 of 468 (15.6%) unselected patients with papillary thyroid cancer, compared to 28 of 460 (6.0%) age- and sex-matched controls (OR 3.3; p < 0.0001). A truncating mutation (IVS2 + 1G>A, 1100delC or del5395) was associated with a higher risk of thyroid cancer (OR = 5.7; p = 0.006), than was the missense mutation I157T (OR = 2.8; p = 0.0001). CHEK2 mutation carriers reported a family history of breast cancer 2.2 times more commonly than non-carriers (16.4% vs.8.1%; p = 0.05). A CHEK2 mutation was found in seven of 11 women (63%) with multiple primary cancers of the breast and thyroid (OR = 10; p = 0.0004). These results suggest that CHEK2 mutations predispose to thyroid cancer, familial aggregations of breast and thyroid cancer and to double primary cancers of the breast and thyroid.
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Affiliation(s)
- Monika Siołek
- Department of Genetics, Holycross Cancer Centre, Kielce, Poland
| | - Cezary Cybulski
- Department of Genetics and Pathology, International Hereditary Cancer Centre, Pomeranian Medical University, Szczecin, Poland
| | - Danuta Gąsior-Perczak
- Department of Endocrinology and Nuclear Medicine, Holycross Cancer Centre, Kielce, Poland
| | - Artur Kowalik
- Department of Molecular Diagnostics, Holycross Cancer Centre, Kielce, Poland
| | | | - Aldona Kowalska
- Department of Endocrinology and Nuclear Medicine, Holycross Cancer Centre, Kielce, Poland
| | - Małgorzata Chłopek
- Department of Molecular Diagnostics, Holycross Cancer Centre, Kielce, Poland
| | - Wojciech Kluźniak
- Department of Genetics and Pathology, International Hereditary Cancer Centre, Pomeranian Medical University, Szczecin, Poland
| | - Dominika Wokołorczyk
- Department of Genetics and Pathology, International Hereditary Cancer Centre, Pomeranian Medical University, Szczecin, Poland
| | - Iwona Pałyga
- Department of Endocrinology and Nuclear Medicine, Holycross Cancer Centre, Kielce, Poland
| | - Agnieszka Walczyk
- Department of Endocrinology and Nuclear Medicine, Holycross Cancer Centre, Kielce, Poland
| | - Katarzyna Lizis-Kolus
- Department of Endocrinology and Nuclear Medicine, Holycross Cancer Centre, Kielce, Poland
| | - Ping Sun
- Centre for Research on Women's Health, Toronto Ontario, Canada
| | - Jan Lubiński
- Department of Genetics and Pathology, International Hereditary Cancer Centre, Pomeranian Medical University, Szczecin, Poland
| | - Steven A Narod
- Centre for Research on Women's Health, Toronto Ontario, Canada
| | - Stanisław Góźdż
- Department of Genetics, Holycross Cancer Centre, Kielce, Poland.,Faculty of Health Sciences, The Jan Kochanowski University, Kielce, Poland
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Yeh CW, Yu ZC, Chen PH, Cheng YC, Shieh SY. Phosphorylation at threonine 288 by cell cycle checkpoint kinase 2 ( CHK2) controls human monopolar spindle 1 (Mps1) kinetochore localization. J Biol Chem 2014; 289:15319-27. [PMID: 24764296 DOI: 10.1074/jbc.m114.552273] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Human Mps1 (hMps1) is a mitotic checkpoint kinase responsible for sensing the unattached and tensionless kinetochore. Despite its importance in safeguarding proper chromosome segregation, how hMps1 is recruited to the kinetochore remains incompletely understood. Here, we demonstrate that phosphorylation at Thr-288 by the cell cycle checkpoint kinase CHK2 is involved in this process. We discovered that the phosphorylation-deficient T288A mutant has an impaired ability to localize to the kinetochore and cannot reestablish the mitotic checkpoint in hMps1-depleted cells. In support, we found that nocodazole induced hMps1 phosphorylation at the previously identified CHK2 site Thr-288 and that this could be detected at the kinetochore in a CHK2-dependent manner. Mechanistically, phosphorylation at Thr-288 promoted the interaction with the KMN (KNL1-Mis12-Ndc80 network) protein HEC1. Forced kinetochore localization corrected the defects associated with the T288A mutant. Our results provide evidence of a newly identified hMps1 phosphorylation site that is involved in the mitotic checkpoint and that CHK2 contributes to chromosomal stability through hMps1.
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Affiliation(s)
- Chun-Wei Yeh
- From the Institute of Biomedical Sciences, Academia Sinica, 128 Sec. 2, Academia Road, Taipei 115, Taiwan
| | - Zheng-Cheng Yu
- From the Institute of Biomedical Sciences, Academia Sinica, 128 Sec. 2, Academia Road, Taipei 115, Taiwan
| | - Peng-Hsu Chen
- From the Institute of Biomedical Sciences, Academia Sinica, 128 Sec. 2, Academia Road, Taipei 115, Taiwan
| | - Yu-Che Cheng
- From the Institute of Biomedical Sciences, Academia Sinica, 128 Sec. 2, Academia Road, Taipei 115, Taiwan
| | - Sheau-Yann Shieh
- From the Institute of Biomedical Sciences, Academia Sinica, 128 Sec. 2, Academia Road, Taipei 115, Taiwan
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Tu WZ, Li B, Huang B, Wang Y, Liu XD, Guan H, Zhang SM, Tang Y, Rang WQ, Zhou PK. γH2AX foci formation in the absence of DNA damage: mitotic H2AX phosphorylation is mediated by the DNA-PKcs/ CHK2 pathway. FEBS Lett 2013; 587:3437-43. [PMID: 24021642 DOI: 10.1016/j.febslet.2013.08.028] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 08/06/2013] [Accepted: 08/21/2013] [Indexed: 12/15/2022]
Abstract
Phosphorylated H2AX is considered to be a biomarker for DNA double-strand breaks (DSB), but recent evidence suggests that γH2AX does not always indicate the presence of DSB. Here we demonstrate the bimodal dynamic of H2AX phosphorylation induced by ionizing radiation, with the second peak appearing when G2/M arrest is induced. An increased level of γH2AX occurred in mitotic cells, and this increase was attenuated by DNA-PKcs inactivation or Chk2 depletion, but not by ATM inhibition. The phosphorylation-mimic CHK2-T68D abrogated the attenuation of mitotic γH2AX induced by DNA-PKcs inactivation. Thus, the DNA-PKcs/CHK2 pathway mediates the mitotic phosphorylation of H2AX in the absence of DNA damage.
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Affiliation(s)
- Wen-Zhi Tu
- Institute for Environmental Medicine and Radiation Hygiene, The College of Public Health, University of South China, Hengyang, Hunan Province 421000, PR China; Department of Radiation Toxicology and Oncology, Beijing Institute of Radiation Medicine, Beijing 100850, PR China
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Abstract
Gain-of-function mutations in oncogenes and loss-of-function mutations in tumor suppressor genes (TSG) lead to cancer. In most human cancers, these mutations occur in somatic tissues. However, hereditary forms of cancer exist for which individuals are heterozygous for a germline mutation in a TSG locus at birth. The second allele is frequently inactivated by gene deletion, point mutation, or promoter methylation in classical TSGs that meet Knudson's two-hit hypothesis. Conversely, the second allele remains as wild-type, even in tumors in which the gene is haplo-insufficient for tumor suppression. This article highlights the importance of PTEN, APC, and other tumor suppressors for counteracting aberrant PI3K, β-catenin, and other oncogenic signaling pathways. We discuss the use of gene-engineered mouse models (GEMM) of human cancer focusing on Pten and Apc knockout mice that recapitulate key genetic events involved in initiation and progression of human neoplasia. Finally, the therapeutic potential of targeting these tumor suppressor and oncogene signaling networks is discussed.
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Affiliation(s)
- Kazushi Inoue
- Department of Pathology, Wake Forest University Health Sciences, Medical Center Boulevard, Winston-Salem, NC 27157, USA
- Department of Cancer Biology, Wake Forest University Health Sciences, Medical Center Boulevard, Winston-Salem, NC 27157, USA
| | - Elizabeth A. Fry
- Department of Pathology, Wake Forest University Health Sciences, Medical Center Boulevard, Winston-Salem, NC 27157, USA
- Department of Cancer Biology, Wake Forest University Health Sciences, Medical Center Boulevard, Winston-Salem, NC 27157, USA
| | - Pankaj Taneja
- Department of Pathology, Wake Forest University Health Sciences, Medical Center Boulevard, Winston-Salem, NC 27157, USA
- Department of Cancer Biology, Wake Forest University Health Sciences, Medical Center Boulevard, Winston-Salem, NC 27157, USA
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37
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Zhang T, Tan Y, Zhao R, Liu Z. DNA damage induced by oridonin involves cell cycle arrest at G2/M phase in human MCF-7 cells. Contemp Oncol (Pozn) 2013; 17:38-44. [PMID: 23788960 DOI: 10.5114/wo.2013.33772] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2012] [Revised: 07/15/2012] [Accepted: 08/31/2012] [Indexed: 11/17/2022] Open
Abstract
Aim of the study To study the mechanisms of inhibition of cell growth and induction of DNA damage in oridonin-treated MCF-7 human breast cancer cells. Material and methods The cytotoxicity of oridonin-treated MCF-7 cells was measured by MTT assay. Cell cycle phase distribution was analyzed by flow cytometry. P-ATM, P-CHK2, γH2AX and P-P53 protein expressions were detected by Western blot analysis. The expression of r-h2ax and P-ATM was also detected by immunofluorescence staining. The degree of cellular damage of oridonin-induced MCF-7 human breast cancer cells was confirmed by the comet assay analysis of DNA fragmentation. Results Oridonin inhibited cell growth in a time- and dose-dependent manner. The IC50 values at 48 and 72 hours were 78.3 and 31.62 µmol/l, respectively. Oridonin induced G2/M phase arrest in MCF-7 cells. MCF-7 cells treated with oridonin showed significant DNA damage as shown by an increase in olive tail moment (OTM). The protein expression levels of P-ATM, P-CHK2, γH2AX and P-P53 were increased significantly in a dose-dependent manner. Conclusions DNA damage provokes p53-mediated G2/M cell cycle arrest in oridonin-induced MCF-7 cells through the mechanism of CHK2 activation by activated ATM protein kinase, which is induced by oridonin.
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Hamzehloie T, Mojarrad M, Hasanzadeh Nazarabadi M, Shekouhi S. The role of tumor protein 53 mutations in common human cancers and targeting the murine double minute 2-p53 interaction for cancer therapy. Iran J Med Sci 2012; 37:3-8. [PMID: 23115424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Revised: 10/08/2011] [Accepted: 11/13/2011] [Indexed: 12/05/2022]
Abstract
The gene TP53 (also known as protein 53 or tumor protein 53), encoding transcription factor P53, is mutated or deleted in half of human cancers, demonstrating the crucial role of P53 in tumor suppression. There are reports of nearly 250 independent germ line TP53 mutations in over 100 publications. The P53 protein has the structure of a transcription factor and, is made up of several domains. The main function of P53 is to organize cell defense against cancerous transformation. P53 is a potent transcription factor that is activated in response to diverse stresses, leading to the induction of cell cycle arrest, apoptosis or senescence. The P53 tumor suppressor is negatively regulated in cells by the murine double minute 2 (MDM2) protein. Murine double minute 2 favors its nuclear export, and stimulates its degradation. Inhibitors of the P53-MDM2 interaction might be attractive new anticancer agents that could be used to activate wild-type P53 in tumors. Down regulation of MDM2 using an small interfering RNA (siRNA) approach has recently provided evidence for a new role of MDM2 in the P53 response, by modulating the inhibition of the cyclindependent kinase 2 (cdk2) by P21/WAF1 (also known as cyclin-dependent kinase inhibitor 1 or CDK-interacting protein 1).
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