title: Key Genes in Stomach Adenocarcinoma Identified via Network Analysis of RNA-Seq Data.
abstract: RNA-seq data of stomach adenocarcinoma (STAD) were analyzed to identify critical genes in STAD. Meanwhile, relevant small molecule drugs, transcription factors (TFs) and microRNAs (miRNAs) were also investigated. Gene expression data of STAD were downloaded from The Cancer Genome Atlas (TCGA). Differential analysis was performed with package edgeR. Relationships with correlation coefficient > 0.6 were retained in the gene co-expression network. Functional enrichment analysis was performed for the genes in the network with DAVID and KOBASS 2.0. Modules were identified using Cytoscape. Relevant small molecules drugs, transcription factors (TFs) and microRNAs (miRNAs) were revealed by using CMAP and WebGestalt databases. A total of 520 DEGs were identified between 285 STAD samples and 33 normal controls, including 244 up-regulated and 276 down-regulated genes. A gene co-expression network containing 53 DEGs and 338 edges was constructed, the genes of which were significantly enriched in focal adhesion, ECM-receptor interaction and vascular smooth muscle contraction pathways. Three modules were identified from the gene co-expression network and they were associated with skeletal system development, inflammatory response and positive regulation of cellular process, respectively. A total of 20 drugs, 9 TFs and 6 miRNAs were acquired that may regulate the DEGs. NFAT-COL1A1/ANXA1, HSF2-FOS, SREBP-IL1RN and miR-26-COL5A2 regulation axes may be important mechanisms for STAD.
authors.affiliation: Department of Digestive Surgery, HanZhong Central Hospital, Hanzhong, Shaanxi, 723000, China.
authors.forename: Li
authors.initials: L
authors.lastname: Shen
authors.affiliation: Department of Digestive Surgery, HanZhong Central Hospital, Hanzhong, Shaanxi, 723000, China.
authors.forename: Lizhi
authors.initials: L
authors.lastname: Zhao
authors.affiliation: Department of Digestive Surgery, HanZhong Central Hospital, Hanzhong, Shaanxi, 723000, China.
authors.forename: Jiquan
authors.initials: J
authors.lastname: Tang
authors.affiliation: Department of Digestive Surgery, HanZhong Central Hospital, Hanzhong, Shaanxi, 723000, China.
authors.forename: Zhiwei
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Department of Digestive Surgery, HanZhong Central Hospital, Hanzhong, Shaanxi, 723000, China.
authors.forename: Weisong
authors.initials: W
authors.lastname: Bai
authors.affiliation: Department of Digestive Surgery, HanZhong Central Hospital, Hanzhong, Shaanxi, 723000, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Zhang
authors.affiliation: Department of Digestive Surgery, HanZhong Central Hospital, Hanzhong, Shaanxi, 723000, China.
authors.forename: Shouli
authors.initials: S
authors.lastname: Wang
authors.affiliation: The People's Hospital in Gansu Province, Center Lab, No, 204 west Donggang Rood, Lanzhou City, Gansu Province, 730000, China. weiweihhh@aliyun.com.
authors.forename: Weihua
authors.initials: W
authors.lastname: Li
mesh_terms: D000230:Adenocarcinoma / Q000235:genetics*; D020869:Gene Expression Profiling / Q000379:methods*; D053263:Gene Regulatory Networks / Q000235:genetics*; D006801:Humans; D035683:MicroRNAs / Q000235:genetics; D013274:Stomach Neoplasms / Q000235:genetics*; D059467:Transcriptome / Q000235:genetics*
chemical_list: D035683:MicroRNAs
keywords: Differentially expressed genes; Functional enrichment analysis; Gene co-expression network; Gene expression data; Stomach adenocarcinoma