Int J Biol Sci 2019; 15(11):2282-2295. doi:10.7150/ijbs.32899

Research Paper

A robust 6-mRNA signature for prognosis prediction of pancreatic ductal adenocarcinoma

Chenhao Zhou1*, Yue Zhao2,3*, Yirui Yin1*, Zhiqiu Hu4, Manar Atyah1, Wanyong Chen1,4, Zhefeng Meng4, Huarong Mao4, Qiang Zhou1, Weiguo Tang4, Pengcheng Wang4, Zhanming Li4, Jialei Weng4, Christiane Bruns2, Marie Popp2, Felix Popp2, Qiongzhu Dong4,5✉, Ning Ren1,4✉

1. Department of Liver Surgery, Liver Cancer Institute, Zhongshan Hospital, Fudan University and Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai, China;
2. Department of General, Visceral and Cancer Surgery, University Hospital of Cologne, Cologne, Germany;
3. Department of Surgery, Otto-von-Guericke University, Magdeburg, Germany;
4. Institute of Fudan Minhang Academic Health System, Minhang Hospital, Fudan University, Shanghai, China;
5. Institutes of Biomedical Sciences, Fudan University, Shanghai, China.
* Contributing equally

Abstract

Pancreatic ductal adenocarcinoma (PDAC) is one of the most fatal malignancies worldwide. PDAC prognostic and diagnostic biomarkers are still being explored. The aim of this study is to establish a robust molecular signature that can improve the ability to predict PDAC prognosis. 155 overlapping differentially expressed genes between tumor and non-tumor tissues from three Gene Expression Omnibus (GEO) datasets were explored. A least absolute shrinkage and selection operator method (LASSO) Cox regression model was employed for selecting prognostic genes. We developed a 6-mRNA signature that can distinguish high PDAC risk patients from low risk patients with significant differences in overall survival (OS). We further validated this signature prognostic value in three independent cohorts (GEO batch, P < 0.0001; ICGC, P = 0.0036; Fudan, P = 0.029). Furthermore, we found that our signature remained significant in patients with different histologic grade, TNM stage, locations of tumor entity, age and gender. Multivariate cox regression analysis showed that 6-mRNA signature can be an independent prognostic marker in each of the cohorts. Receiver operating characteristic curve (ROC) analysis also showed that our signature possessed a better predictive role of PDAC prognosis. Moreover, the gene set enrichment analysis (GSEA) analysis showed that several tumorigenesis and metastasis related pathways were indeed associated with higher scores of risk. In conclusion, identifying the 6-mRNA signature could provide a valuable classification method to evaluate clinical prognosis and facilitate personalized treatment for PDAC patients. New therapeutic targets may be developed upon the functional analysis of the classifier genes and their related pathways.

Keywords: Pancreatic ductal adenocarcinoma, molecular signature, survival

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How to cite this article:
Zhou C, Zhao Y, Yin Y, Hu Z, Atyah M, Chen W, Meng Z, Mao H, Zhou Q, Tang W, Wang P, Li Z, Weng J, Bruns C, Popp M, Popp F, Dong Q, Ren N. A robust 6-mRNA signature for prognosis prediction of pancreatic ductal adenocarcinoma. Int J Biol Sci 2019; 15(11):2282-2295. doi:10.7150/ijbs.32899. Available from http://www.ijbs.com/v15p2282.htm