Dataset Information



ABSTRACT: Triple negative breast cancers (TNBCs) are characterised by a wide spectrum of genomic aberrations representing underlying repair defects that may be targeted therapeutically. However, means to measure these defects in tumours and an understanding of their effect on sensitivity to DNA damaging agents is limited. We sought to address this by establishing methods to trace underlying deficiencies in DNA repair processes using patterns of genomic instability. Here, we demonstrate that a pattern related to Homologous Recombination defects, allelic-imbalanced Copy Number Aberration, predicts response to platinum containing chemotherapeutics in TNBC patients. These patterns also enabled us to identify a meiotic gene HORMAD1, as a functional driver of allelic-imbalanced Copy Number Aberration and genomic instability in TNBC. Additionally, HORMAD1 expression is also a predictive marker of carboplatin response in TNBC. Mechanistically, expression of HORMAD1 in cell lines inhibited Homologous Recombination representing outÐof-context activation of its meiotic function.

ORGANISM(S): Homo sapiens  

SUBMITTER: Anita Grigoriadis  

PROVIDER: E-MTAB-2626 | ArrayExpress | 2015-03-31


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