Abstract:Objective To evaluate the screening effect of differential network analysis based on non-paranormal graphical models, and to screen the hub genes affecting the survival time of patients with hepatocellular carcinoma using the differential network analysis model so as to predict the patients’ prognoses or serve as a new drug target. Methods The screening effect of differential network analysis using non-paranormal graphical models was evaluated by the area under the ROC curve (AUC) values in the simulation experiments. The gene expression data of hepatocellular carcinoma from 3 platforms and 5 datasets were downloaded from The Cancer Genome Atlas (TCGA) database, and then incorporated prior information such as pathways into differential network using non-paranormal graphical models to construct the differential network. The hub genes were chosen by the degree, the number of edges connected to the node. Results In the simulation experiments performed under four conditions, the AUC values of the non-paranormal graphical models ranged from 0.71 to 0.97. In the application of hepatocellular carcinoma data, 8 hub genes related to the survival time of hepatocellular carcinoma were screened respectively, which were IGF1, ErbB2, FGF9, GH2, cSH2, HSP90AA1, PPP2R5B and EPO. Conclusions The simulation experiments of differential network analysis based on non-paranormal graphical models show good results. The biological function of hub genes affecting the survival time of patients with hepatocellular carcinoma is clearly defined.
李晶, 张奇, 任雨冬, 刘艳. 基于非参数正态图模型的差异网络分析——肝细胞癌生存时间枢纽基因的筛选[J]. 实用预防医学, 2019, 26(4): 404-408.
LI Jing, ZHANG Qi, REN Yu-dong, LIU Yan. Differential network analysis based on non-paranormal graphical models—screening of hub genes related to the survival time of hepatocellular carcinoma. , 2019, 26(4): 404-408.
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