A multi-gene signature predicts outcome in patients with pancreatic ductal adenocarcinoma

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• 作者：Syed Haider ; Jun Wang ; Ai Nagano ; Ami Desai ; Prabhu Arumugam…
• 刊名：Genome Medicine
• 出版年：2014
• 出版时间：December 2014
• 年：2014
• 卷：6
• 期：12
• 全文大小：1,953 KB
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• 刊物主题：Human Genetics; Proteomics; Bioinformatics; Internal Medicine;
• 出版者：BioMed Central
• ISSN：1756-994X

文摘

Background Improved usage of the repertoires of pancreatic ductal adenocarcinoma (PDAC) profiles is crucially needed to guide the development of predictive and prognostic tools that could inform the selection of treatment options. Methods Using publicly available mRNA abundance datasets, we performed a large retrospective meta-analysis on 466 PDAC patients to discover prognostic gene signatures. These signatures were trained on two clinical cohorts (n--0), and validated on four independent clinical cohorts (n--46). Further validation of the identified gene signature was performed using quantitative real-time RT-PCR. Results We identified 225 candidate prognostic genes. Using these, a 36-gene signature was discovered and validated on fully independent clinical cohorts (hazard ratio (HR)--.06, 95% confidence interval (CI)--.51 to 2.81, P--.62?×-0?, n--46). This signature serves as a good alternative prognostic stratification marker compared to tumour grade (HR--.05, 95% CI--.45 to 2.88, P--.18?×-0?) and tumour node metastasis (TNM) stage (HR--.13, 95% CI--.66 to 1.94, P--.67). Upon multivariate analysis with adjustment for TNM stage and tumour grade, the 36-gene signature remained an independent prognostic predictor of clinical outcome (HR--.21, 95% CI--.17 to 4.16, P--.01). Univariate assessment revealed higher expression of ITGA5, SEMA3A, KIF4A, IL20RB, SLC20A1, CDC45, PXN, SSX3 and TMEM26 was correlated with shorter survival while B3GNT1, NOSTRIN and CADPS down-regulation was associated with poor outcome. Conclusions Our 36-gene classifier is able to prognosticate PDAC independent of patient cohort and microarray platforms. Further work on the functional roles, downstream events and interactions of the signature genes is likely to reveal true molecular candidates for PDAC therapeutics.