Reference Detail

Ref Type

Journal Article

PMID

(29760405)

Authors

Berns K, Caumanns JJ, Hijmans EM, Gennissen AMC, Severson TM, Evers B, Wisman GBA, Jan Meersma G, Lieftink C, Beijersbergen RL, Itamochi H, van der Zee AGJ, de Jong S, Bernards R

Title

ARID1A mutation sensitizes most ovarian clear cell carcinomas to BET inhibitors.

Journal	Vol	Issue	Date	Pages	Journal Short Title
Oncogene	37	33	2018 Aug	4611-4625	Oncogene

URL

Abstract Text

Current treatment for advanced stage ovarian clear cell cancer is severely hampered by a lack of effective systemic therapy options, leading to a poor outlook for these patients. Sequencing studies revealed that ARID1A is mutated in over 50% of ovarian clear cell carcinomas. To search for a rational approach to target ovarian clear cell cancers with ARID1A mutations, we performed kinome-centered lethality screens in a large panel of ovarian clear cell carcinoma cell lines. Using the largest OCCC cell line panel established to date, we show here that BRD2 inhibition is predominantly lethal in ARID1A mutated ovarian clear cell cancer cells. Importantly, small molecule inhibitors of the BET (bromodomain and extra terminal domain) family of proteins, to which BRD2 belongs, specifically inhibit proliferation of ARID1A mutated cell lines, both in vitro and in ovarian clear cell cancer xenografts and patient-derived xenograft models. BET inhibitors cause a reduction in the expression of multiple SWI/SNF members including ARID1B, providing a potential explanation for the observed lethal interaction with ARID1A loss. Our data indicate that BET inhibition may represent a novel treatment strategy for a subset of ARID1A mutated ovarian clear cell carcinomas.

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Molecular Profile	Treatment Approach

Gene Name	Source	Synonyms	Protein Domains	Gene Description	Gene Role

Therapy Name	Drugs	Efficacy Evidence	Clinical Trials

Drug Name	Trade Name	Synonyms	Drug Classes	Drug Description

Gene	Variant	Impact	Protein Effect	Variant Description	Associated with drug Resistance

Molecular Profile	Indication/Tumor Type	Response Type	Therapy Name	Approval Status	Evidence Type	Efficacy Evidence	References
ARID1A dec exp	ovarian clear cell carcinoma	predicted - sensitive	Molibresib	Preclinical - Cell culture	Actionable	In a preclinical study, knockdown of ARID1A resulted in increased sensitivity to Molibresib (GSK525762) in ovarian clear cell carcinoma cell lines in culture (PMID: 29760405).	29760405
ARID1A loss	ovarian clear cell carcinoma	predicted - sensitive	JQ1	Preclinical - Cell culture	Actionable	In a preclinical study, knockout of ARID1A in ovarian clear cell carcinoma cell lines resulted in increased sensitivity to growth inhibition by JQ1 compared to cells with wild-type ARID1A in culture (PMID: 29760405).	29760405
ARID1A Q1148*	ovarian clear cell carcinoma	predicted - sensitive	JQ1	Preclinical - Pdx	Actionable	In a preclinical study, JQ1 inhibited tumor growth in an ovarian clear cell carcinoma patient-derived xenograft (PDX) model harboring ARID1A Q1148*, but did not inhibit growth in a model with wild-type ARID1A (PMID: 29760405).	29760405