Lineage-specific canonical and non-canonical activity of EZH2 in advanced prostate cancer subtypes
Author:
Venkadakrishnan Varadha Balaji1ORCID, Presser Adam G.1, Singh Richa2, Booker Matthew A.1, Traphagen Nicole A.1, Weng Kenny1, Voss Nathaniel C.1, Mahadevan Navin R.1, Mizuno Kei3, Puca Loredana4, Idahor Osasenaga1, Ku Sheng-Yu1ORCID, Bakht Martin K.1ORCID, Borah Ashir A.5ORCID, Herbert Zachary T.1, Tolstorukov Michael Y.1, Barbie David A.1, Rickman David S.2ORCID, Brown Myles1ORCID, Beltran Himisha1ORCID
Affiliation:
1. Dana-Farber Cancer Institute 2. Weill Cornell Medicine 3. Dana Farber Cancer Institute 4. Division of Medical Oncology, Weill Cornell Medicine 5. Broad Institute of Harvard and MIT
Abstract
Abstract
Enhancer of zeste homolog 2 (EZH2) is a histone methyltransferase and emerging therapeutic target that is overexpressed in most castration-resistant prostate cancers and implicated as a driver of disease progression and resistance to hormonal therapies. Here we define the lineage-specific action and differential activity of EZH2 in both prostate adenocarcinoma (PRAD) and neuroendocrine prostate cancer (NEPC) subtypes of advanced prostate cancer to better understand the role of EZH2 in modulating differentiation, lineage plasticity, and to identify mediators of response and resistance to EZH2 inhibitor therapy. Mechanistically, EZH2 modulates bivalent genes that results in upregulation of NEPC-associated transcriptional drivers (e.g., ASCL1) and neuronal gene programs, and leads to forward differentiation after targeting EZH2 in NEPC. Subtype-specific downstream effects of EZH2 inhibition on cell cycle genes support the potential rationale for co-targeting cyclin/CDK to overcome resistance to EZH2 inhibition.
Publisher
Springer Science and Business Media LLC
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