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. 2018 Feb;7(2):344-350.
doi: 10.1002/cam4.1303. Epub 2017 Dec 28.

Identification of a novel gene pairs signature in the prognosis of gastric cancer

Pai-Lan Peng  1   2 , Xiang-Yu Zhou  2 , Guo-Dong Yi  2 , Peng-Fei Chen  2   3 , Fan Wang  3 , Wei-Guo Dong  1
Affiliations

Identification of a novel gene pairs signature in the prognosis of gastric cancer

Pai-Lan Peng et al. Cancer Med. 2018 Feb.

Abstract

Current prognostic signatures need to be improved in identifying high-risk patients of gastric cancer (GC). Thus, we aimed to develop a reliable prognostic signature that could assess the prognosis risk in GC patients. Two microarray datasets of GSE662254 (n = 300, training set) and GSE15459 (n = 192, test set) were included into analysis. Prognostic genes were screened to construct prognosis-related gene pairs (PRGPs). Then, a penalized Cox proportional hazards regression model identified seven PRGPs, which constructed a prognostic signature and divided patients into high- and low-risk groups according to the signature score. High-risk patients showed a poorer prognosis than low-risk patients in both the training set (hazard ratios [HR]: 6.086, 95% confidence interval [CI]: 4.341-8.533) and test set (1.773 [1.107-2.840]). The PRGPs signature also achieved a higher predictive accuracy (concordance index [C-index]: 0.872, 95% CI: 0.846-0.897) than two existing molecular signatures (0.706 [0.667-0.744] for a 11-gene signature and 0.684 [0.642-0.726] for a 24-lncRNA signature) and TNM stage (0.764 [0.715-0.814]). In conclusion, our study identified a novel gene pairs signature in the prognosis of GC.

Keywords: Gastric cancer; gene pairs; prognosis; signature.

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Figures

Figure 1
Figure 1
Distribution of the patients’ survival status and risk scores of the prognosis‐related gene pairs (PRGPs) signature.
Figure 2
Figure 2
Kaplan–Meier curves of overall survival among the patients in training set.
Figure 3
Figure 3
Kaplan–Meier curves of overall survival among the patients in test set.
Figure 4
Figure 4
Time‐dependent receiver operating characteristic (ROC) curves of different prognostic signatures in gastric cancer.
Figure 5
Figure 5
Gene set enrichment analysis.
See this image and copyright information in PMC

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