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Chen H, Diolaiti ME, O’Leary PC, Rojc A, Krogan NJ, Kim M, Ashworth A. A Whole-Genome CRISPR Screen Identifies AHR Loss as a Mechanism of Resistance to a PARP7 Inhibitor. Mol Cancer Ther 2022; 21:1076-1089. [PMID: 35439318 PMCID: PMC9769698 DOI: 10.1158/1535-7163.mct-21-0841] [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: 10/12/2021] [Revised: 02/09/2022] [Accepted: 04/12/2022] [Indexed: 01/07/2023]
Abstract
Inhibitors directed toward PARP1 and PARP2 are approved agents for the treatment of BRCA1 and BRCA2-related cancers. Other members of the PARP family have also been implicated in cancer and are being assessed as therapeutic targets in cancer and other diseases. Recently, an inhibitor of PARP7 (RBN-2397) has reached early-stage human clinical trials. Here, we performed a genome-wide CRISPR screen for genes that modify the response of cells to RBN-2397. We identify the polycyclic aromatic hydrocarbon receptor AHR and multiple components of the cohesin complex as determinants of resistance to this agent. Activators and inhibitors of AHR modulate the cellular response to PARP7 inhibition, suggesting potential combination therapy approaches.
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Affiliation(s)
- Huadong Chen
- Helen Diller Family Comprehensive Cancer Center, San Francisco, CA, USA 94158
| | - Morgan E. Diolaiti
- Helen Diller Family Comprehensive Cancer Center, San Francisco, CA, USA 94158
- The Cancer Cell Map Initiative, San Francisco and La Jolla, CA, USA
| | - Patrick C. O’Leary
- Helen Diller Family Comprehensive Cancer Center, San Francisco, CA, USA 94158
- The Cancer Cell Map Initiative, San Francisco and La Jolla, CA, USA
| | - Ajda Rojc
- Department of Cellular and Molecular Pharmacology, University of California, San Francisco, CA, USA 94158
- The J. David Gladstone Institute of Data Science and Biotechnology, San Francisco, CA, USA 94158
- Quantitative Biosciences Institute, University of California, San Francisco, CA, USA 94158
- The Cancer Cell Map Initiative, San Francisco and La Jolla, CA, USA
| | - Nevan J. Krogan
- Department of Cellular and Molecular Pharmacology, University of California, San Francisco, CA, USA 94158
- The J. David Gladstone Institute of Data Science and Biotechnology, San Francisco, CA, USA 94158
- Quantitative Biosciences Institute, University of California, San Francisco, CA, USA 94158
- The Cancer Cell Map Initiative, San Francisco and La Jolla, CA, USA
| | - Minkyu Kim
- Department of Cellular and Molecular Pharmacology, University of California, San Francisco, CA, USA 94158
- The J. David Gladstone Institute of Data Science and Biotechnology, San Francisco, CA, USA 94158
- Quantitative Biosciences Institute, University of California, San Francisco, CA, USA 94158
- The Cancer Cell Map Initiative, San Francisco and La Jolla, CA, USA
| | - Alan Ashworth
- Helen Diller Family Comprehensive Cancer Center, San Francisco, CA, USA 94158
- The Cancer Cell Map Initiative, San Francisco and La Jolla, CA, USA
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