Abstract:
UNLABELLED:ARID1A, SWI/SNF chromatin remodeling complex subunit, is a recently identified tumor suppressor that is mutated in a broad spectrum of human cancers. Thus, it is of fundamental clinical importance to understand its molecular functions and determine whether ARID1A deficiency can be exploited therapeutically. In this article, we report a key function of ARID1A in regulating the DNA damage checkpoint. ARID1A is recruited to DNA double-strand breaks (DSB) via its interaction with the upstream DNA damage checkpoint kinase ATR. At the molecular level, ARID1A facilitates efficient processing of DSB to single-strand ends and sustains DNA damage signaling. Importantly, ARID1A deficiency sensitizes cancer cells to PARP inhibitors in vitro and in vivo, providing a potential therapeutic strategy for patients with ARID1A-mutant tumors. SIGNIFICANCE:ARID1A has been identified as one of the most frequently mutated genes across human cancers. Our data suggest that clinical utility of PARP inhibitors might be extended beyond patients with BRCA mutations to a larger group of patients with ARID1A-mutant tumors, which may exhibit therapeutic vulnerability to PARP inhibitors.
journal_name
Cancer Discovjournal_title
Cancer discoveryauthors
Shen J,Peng Y,Wei L,Zhang W,Yang L,Lan L,Kapoor P,Ju Z,Mo Q,Shih IeM,Uray IP,Wu X,Brown PH,Shen X,Mills GB,Peng Gdoi
10.1158/2159-8290.CD-14-0849subject
Has Abstractpub_date
2015-07-01 00:00:00pages
752-67issue
7eissn
2159-8274issn
2159-8290pii
2159-8290.CD-14-0849journal_volume
5pub_type
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