Reference Detail

Ref Type

Journal Article

PMID

(27958275)

Authors

Williamson CT, Miller R, Pemberton HN, Jones SE, Campbell J, Konde A, Badham N, Rafiq R, Brough R, Gulati A, Ryan CJ, Francis J, Vermulen PB, Reynolds AR, Reaper PM, Pollard JR, Ashworth A, Lord CJ

Title

ATR inhibitors as a synthetic lethal therapy for tumours deficient in ARID1A.

Journal	Vol	Issue	Date	Pages	Journal Short Title
Nature communications	7		2016 Dec 13	13837	Nat Commun

URL

Abstract Text

Identifying genetic biomarkers of synthetic lethal drug sensitivity effects provides one approach to the development of targeted cancer therapies. Mutations in ARID1A represent one of the most common molecular alterations in human cancer, but therapeutic approaches that target these defects are not yet clinically available. We demonstrate that defects in ARID1A sensitize tumour cells to clinical inhibitors of the DNA damage checkpoint kinase, ATR, both in vitro and in vivo. Mechanistically, ARID1A deficiency results in topoisomerase 2A and cell cycle defects, which cause an increased reliance on ATR checkpoint activity. In ARID1A mutant tumour cells, inhibition of ATR triggers premature mitotic entry, genomic instability and apoptosis. The data presented here provide the pre-clinical and mechanistic rationale for assessing ARID1A defects as a biomarker of single-agent ATR inhibitor response and represents a novel synthetic lethal approach to targeting tumour cells.

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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 Q456*	colorectal cancer	sensitive	VE-821	Preclinical - Cell culture	Actionable	In a preclinical study, colorectal cancer cells homozygous for ARID1A Q456* were sensitive to VE-821 in in vitro assays, demonstrating decrease cell survival (PMID: 27958275).	27958275
ARID1A Q456*	colorectal cancer	sensitive	Berzosertib	Preclinical - Cell line xenograft	Actionable	In a preclinical study, Berzosertib (VX-970) treatment in colorectal cancer cells homozygous for ARID1A Q456* resulted in decreased cell survival in culture, and tumor growth inhibition in cell line xenograft models (PMID: 27958275).	27958275
ARID1A mutant	ovarian clear cell carcinoma	sensitive	Berzosertib	Preclinical - Cell line xenograft	Actionable	In a preclinical study, Berzosertib (VX-970) treatment in ovarian clear cell carcinoma cells harboring an ARID1A mutation resulted in decreased cell survival and induction of DNA damage and apoptosis in culture, and tumor growth inhibition in cell line xenograft models (PMID: 27958275).	27958275
ARID1A mutant	ovarian clear cell carcinoma	sensitive	VE-821	Preclinical - Cell culture	Actionable	In a preclinical study, ovarian clear cell carcinoma cells harboring an ARID1A mutation were sensitive to VE-821 in in vitro assays, demonstrating decreased cell survival (PMID: 27958275).	27958275