Copy Number Alterations Of Dna Mismatch Repair (Mmr) Genes As Novel Prognostic Markers In Localised Prostate Cancer (Cap).
JOURNAL OF CLINICAL ONCOLOGY(2016)
Abstract
96 Background: To investigate the prognostic significance of CNA of genes involved in the MMR pathway in localised CaP. Methods: We studied CNA of genes involved in MMR, namely MSH2, MSH3, MSH6, MLH1, PMS2, in 284 patients with intermediate-risk CaP (Toronto cohort), and compared our findings against three public databases (MSKCC and Cambridge cohorts) that included 375 low- to high-risk CaP. The Toronto cohort comprised of 143 and 141 individuals who underwent image-guided radiotherapy (IGRT) and radical prostatectomy (RadP), respectively, while all patients from the public databases underwent RadP. Information on genome-wide copy number alterations (Toronto) was obtained using Affymetrix Oncoscan array. Biochemical relapse-free survival (bRFS) was assessed for clinical outcome. Results: CNA of MSH2, MSH3, MSH6, MLH1, PMS2 were observed in 3.9% (n = 11), 7.7% (n = 22), 3.9% (n = 11), 4.6% (n = 13) and 13.0% (n = 37) of the Toronto cohort, respectively. Distinct patterns of allelic gain and loss were obse...
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