Abstract
Esophageal squamous-cell carcinoma (ESCC) is one of the most common cancers and is associated with a poor prognosis. Studies are warranted on the clinical relevance of its genomic copy-number alterations (CNA) as prognosticators for ESCC. In the present study, we first screened recurrent CNA by array-based comparative genomic hybridization using an in-house focused bacterial artificial chromosome-based array for 108 loci in 45 ESCC specimens. We detected 14 regions showing recurrent (>20%) CNA (4 losses and 10 gains) by array-based comparative genomic hybridization in the first cohort. Among them, loss of 3p14.2 and gain of 8q24.21 for the FHIT and MYC genes, respectively, and the accumulation of those two CNA (higher FM-CNA scores) were significantly associated with a worse overall survival (OS) in the first cohort (P = 0.0273, P = 0.0356 and P = 0.0089, respectively). In the independent validation cohort of 92 resected ESCC cases, loss of FHIT, gain of MYC and higher FM-CNA scores determined by a quantitative genomic PCR-based copy-number analysis were associated with a worse OS (P = 0.0011, P = 0.0104 and P = 0.0008, respectively) and disease-free survival (P = 0.0038, P = 0.0132 and P = 0.0021, respectively). In addition, t...Continue Reading
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