ERCC2 Helicase Domain Mutations Confer Nucleotide Excision Repair Deficiency and Drive Cisplatin Sensitivity in Muscle-Invasive Bladder Cancer
DNA-damaging agents comprise the backbone of systemic treatment for many tumor types; however, few reliable predictive biomarkers are available to guide use of these agents. In muscle-invasive bladder cancer (MIBC), cisplatin-based chemotherapy improves survival, yet response varies widely among pat...
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Published in | Clinical cancer research Vol. 25; no. 3; pp. 977 - 988 |
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Main Authors | , , , , , , , , , , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
01.02.2019
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Subjects | |
Online Access | Get full text |
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Summary: | DNA-damaging agents comprise the backbone of systemic treatment for many tumor types; however, few reliable predictive biomarkers are available to guide use of these agents. In muscle-invasive bladder cancer (MIBC), cisplatin-based chemotherapy improves survival, yet response varies widely among patients. Here, we sought to define the role of the nucleotide excision repair (NER) gene
as a biomarker predictive of response to cisplatin in MIBC.
Somatic missense mutations in
are associated with improved response to cisplatin-based chemotherapy; however, clinically identified
mutations are distributed throughout the gene, and the impact of individual
variants on NER capacity and cisplatin sensitivity is unknown. We developed a microscopy-based NER assay to profile
mutations observed retrospectively in prior studies and prospectively within the context of an institution-wide tumor profiling initiative. In addition, we created the first
-deficient bladder cancer preclinical model for studying the impact of
loss of function.
We used our functional assay to test the NER capacity of clinically observed
mutations and found that most
helicase domain mutations cannot support NER. Furthermore, we show that introducing an
mutation into a bladder cancer cell line abrogates NER activity and is sufficient to drive cisplatin sensitivity in an orthotopic xenograft model.
Our data support a direct role for
mutations in driving cisplatin response, define the functional landscape of
mutations in bladder cancer, and provide an opportunity to apply combined genomic and functional approaches to prospectively guide therapy decisions in bladder cancer.
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Authors’ Contributions Development of methodology: Q. Li, A.W. Damish, Z. Frazier, D. Liu, H. Zhao, S.P. Gao, J. Ma, J. Bellmunt, J.-B. Lazaro, D.B. Solit, E.M. Van Allen, K.W. Mouw Analysis and interpretation of data (e.g., statistical analysis, biostatistics, computational analysis): Q. Li, Z. Frazier, D. Liu, E. Reznichenko, A. Kamburov, A. Bell, S.P. Gao, J. Ma, J. Bellmunt, D.B. Solit, D. Bajorin, J.E. Rosenberg, N. Riaz, E.M. Van Allen, G. Iyer, K.W. Mouw Study supervision: S.P. Gao, J. Bellmunt, D.B. Solit, J.E. Rosenberg, G. Iyer, K.W. Mouw Writing, review, and/or revision of the manuscript: Q. Li, Z. Frazier, D. Liu, E. Reznichenko, P.H. Abbosh, J. Bellmunt, E.R. Plimack, D.B. Solit, D. Bajorin, J.E. Rosenberg, A.D. D'Andrea, N. Riaz, E.M. Van Allen, G. Iyer, K.W. Mouw Administrative, technical, or material support (i.e., reporting or organizing data, constructing databases): Q. Li, J.-B. Lazaro, D.B. Solit Conception and design: Q. Li, D. Liu, S.P. Gao, D.B. Solit, J.E. Rosenberg, A.D. D'Andrea, E.M. Van Allen, G. Iyer, K.W. Mouw Acquisition of data (provided animals, acquired and managed patients, provided facilities, etc): Q. Li, A.W. Damish, Z. Frazier, A. Bell, H. Zhao, E.J. Jordan, S.P. Gao, J. Ma, J. Bellmunt, E.R. Plimack, D.B. Solit, D. Bajorin, N. Riaz, E.M. Van Allen, G. Iyer, K.W. Mouw |
ISSN: | 1078-0432 1557-3265 |
DOI: | 10.1158/1078-0432.CCR-18-1001 |