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Thakur V, Zhang K, Savadelis A, Zmina P, Aguila B, Welford SM, Abdul-Karim F, Bonk KW, Keri RA, Bedogni B. The membrane tethered matrix metalloproteinase MT1-MMP triggers an outside-in DNA damage response that impacts chemo- and radiotherapy responses of breast cancer. Cancer Lett 2018; 443:115-124. [PMID: 30502358 DOI: 10.1016/j.canlet.2018.11.031] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [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: 06/20/2018] [Revised: 11/07/2018] [Accepted: 11/09/2018] [Indexed: 01/18/2023]
Abstract
Breast cancer is the second leading cause of death among women in the US. Targeted therapies exist, however resistance is common and patients resort to chemotherapy. Chemotherapy is also a main treatment for triple negative breast cancer (TNBC) patients; while radiation is delivered to patients with advanced disease to counteract metastasis. Yet, resistance to both chemo- and radiotherapy is still frequent, highlighting a need to provide novel sensitizers. We discovered that MT1-MMP modulates DNA damage responses (DDR) in breast cancer. MT1-MMP expression inversely correlates to chemotherapy response of breast cancer patients. Inhibition of MT1-MMP sensitizes TNBC cells to IR and doxorubicin in vitro, and in vivo in an orthotopic breast cancer model. Specifically, depletion of MT1-MMP causes stalling of replication forks and Double Strand Breaks (DBSs), leading to increased sensitivity to additional genotoxic stresses. These effects are mediated by integrinβ1, as a constitutive active integrinβ1 reverts replication defects and protects cells depleted of MT1-MMP from IR and chemotherapy. These data highlight a novel DNA damage response triggered by MT1-MMP-integrinβ1 and provide a new point of therapeutic targeting that may improve breast cancer patient outcomes.
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Affiliation(s)
- Varsha Thakur
- Department of Biochemistry, Case Western Reserve University, Cleveland, OH, 44106, USA; Department of Dermatology, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Keman Zhang
- Department of Biochemistry, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Alyssa Savadelis
- Department of Biochemistry, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Patrick Zmina
- Department of Biochemistry, Case Western Reserve University, Cleveland, OH, 44106, USA; Department of Dermatology, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Brittany Aguila
- Department of Radiation Oncology, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Scott M Welford
- Department of Radiation Oncology, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Fadi Abdul-Karim
- Department of Anatomic Pathology, Cleveland Clinic Foundation, Cleveland, OH, 44119, USA
| | - Kristen W Bonk
- Department of Pharmacology, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Ruth A Keri
- Department of Pharmacology, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Barbara Bedogni
- Department of Biochemistry, Case Western Reserve University, Cleveland, OH, 44106, USA; Department of Dermatology, University of Miami Miller School of Medicine, Miami, FL, 33136, USA.
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Mayca Pozo F, Tang J, Bonk KW, Keri RA, Yao X, Zhang Y. Regulatory cross-talk determines the cellular levels of 53BP1 protein, a critical factor in DNA repair. J Biol Chem 2017; 292:5992-6003. [PMID: 28255090 DOI: 10.1074/jbc.m116.760645] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [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: 09/27/2016] [Revised: 02/28/2017] [Indexed: 01/08/2023] Open
Abstract
DNA double strand breaks (DSBs) severely disrupt DNA integrity. 53BP1 plays critical roles in determining DSB repair. Whereas the recruitment of 53BP1 to the DSB site is key for its function, recent evidence suggests that 53BP1's abundance also plays an important role in DSB repair because recruitment to damage sites will be influenced by protein availability. Initial evidence has pointed to three proteins, the ubiquitin-conjugating enzyme UbcH7, the cysteine protease cathepsin L (CTSL), and the nuclear structure protein lamin A/C, that may impact 53BP1 levels, but the roles of each protein and any interplay between them were unclear. Here we report that UbcH7-dependent degradation plays a major role in controlling 53BP1 levels both under normal growth conditions and during DNA damage. CTSL influenced 53BP1 degradation during DNA damage while having little effect under normal growth conditions. Interestingly, both the protein and the mRNA levels of CTSL were reduced in UbcH7-depleted cells. Lamin A/C interacted with 53BP1 under normal conditions. DNA damage disrupted the lamin A/C-53BP1 interaction, which preceded the degradation of 53BP1 in soluble, but not chromatin-enriched, cellular fractions. Inhibition of 53BP1 degradation by a proteasome inhibitor or by UbcH7 depletion restored the 53BP1-lamin A/C interaction. Depletion of lamin A/C, but not CTSL, caused a similar enhancement in cell sensitivity to DNA damage as UbcH7 depletion. These data suggest that multiple pathways collectively fine-tune the cellular levels of 53BP1 protein to ensure proper DSB repair and cell survival.
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Affiliation(s)
- Franklin Mayca Pozo
- From the Department of Pharmacology, Case Comprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106 and
| | - Jinshan Tang
- From the Department of Pharmacology, Case Comprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106 and.,Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Kristen W Bonk
- From the Department of Pharmacology, Case Comprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106 and
| | - Ruth A Keri
- From the Department of Pharmacology, Case Comprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106 and
| | - Xinsheng Yao
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Youwei Zhang
- From the Department of Pharmacology, Case Comprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106 and
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Seachrist DD, Bonk KW, Ho SM, Prins GS, Soto AM, Keri RA. A review of the carcinogenic potential of bisphenol A. Reprod Toxicol 2015; 59:167-82. [PMID: 26493093 DOI: 10.1016/j.reprotox.2015.09.006] [Citation(s) in RCA: 251] [Impact Index Per Article: 27.9] [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: 04/21/2015] [Revised: 09/09/2015] [Accepted: 09/18/2015] [Indexed: 12/20/2022]
Abstract
The estrogenic properties of bisphenol A (BPA), a ubiquitous synthetic monomer that can leach into the food and water supply, have prompted considerable research into exposure-associated health risks in humans. Endocrine-disrupting properties of BPA suggest it may impact developmental plasticity during early life, predisposing individuals to disease at doses below the oral reference dose (RfD) established by the Environmental Protection Agency in 1982. Herein, we review the current in vivo literature evaluating the carcinogenic properties of BPA. We conclude that there is substantial evidence from rodent studies indicating that early-life BPA exposures below the RfD lead to increased susceptibility to mammary and prostate cancer. Based on the definitions of "carcinogen" put forth by the International Agency for Research on Cancer and the National Toxicology Program, we propose that BPA may be reasonably anticipated to be a human carcinogen in the breast and prostate due to its tumor promoting properties.
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Affiliation(s)
- Darcie D Seachrist
- Department of Pharmacology, Case Western Reserve University, Cleveland, OH 44106-4965, USA
| | - Kristen W Bonk
- Department of Pharmacology, Case Western Reserve University, Cleveland, OH 44106-4965, USA
| | - Shuk-Mei Ho
- Department of Environmental Health, University of Cincinnati, Cincinnati, OH 45267-0056, USA
| | - Gail S Prins
- Departments of Urology, Physiology and Biophysics, University of Illinois, Chicago, IL 60612-7310, USA
| | - Ana M Soto
- Department of Integrative Physiology and Pathobiology, Tufts University, Boston, MA 02111, USA
| | - Ruth A Keri
- Department of Pharmacology, Case Western Reserve University, Cleveland, OH 44106-4965, USA.
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