Identification of DEGs in gastric cancer cells treated with flavonoid prunetin
To determine the impacts of flavonoid prunetin in gastric cancer cells, we analyzed the RNA-seq data from the GEO database. A total of 603 genes were identified with a threshold of P < 0.001. The top up- and down-regulated genes were shown by the heatmap and volcano plot (Figure 1). The top ten DEGs were listed in Table 1.
Enrichment analysis of DEGs in gastric cancer cells treated with flavonoid prunetin
To further study the mechanisms among the DEGs, we performed the KEGG and GO analyses (Figure 2). We identified the top ten KEGG items including “Biosynthesis of cofactors”, “Carbon metabolism”, “Glycine, serine and threonine metabolism”, “Biosynthesis of amino acids”, “Complement and coagulation cascades”, “Arachidonic acid metabolism”, “One carbon pool by folate”, “Folate biosynthesis”, “Glyoxylate and dicarboxylate metabolism”, and “Thiamine metabolism”. We identified the top ten biological processes of GO including “carboxylic acid biosynthetic process”, “organic acid biosynthetic process”, “vascular process in circulatory system”, “negative regulation of response to wounding”, “L−alpha−amino acid transmembrane transport”, “one−carbon metabolic process”, “serine family amino acid metabolic process”, “serine family amino acid biosynthetic process”, “tetrahydrofolate metabolic process”, and “tetrahydrofolate interconversion”. We figured out the top ten cellular components of GO, including “actin−based cell projection”, “basal part of cell”, “cell cortex”, “myofibril”, “contractile fiber”, “sarcomere”, “microvillus”, “filopodium”, “platelet alpha granule lumen”, and “microvillus membrane”. We identified the top ten molecular functions of GO, including “actin binding”, “actin filament binding”, “modified amino acid binding”, “L−amino acid transmembrane transporter activity”, “amino acid transmembrane transporter activity”, “neutral amino acid transmembrane transporter activity”, “translation repressor activity”, “hydrolase activity, acting on carbon−nitrogen (but not peptide) bonds, in cyclic amidines”, “oxidoreductase activity, acting on the CH−NH group of donors, NAD or NADP as acceptor”, and “aromatic amino acid transmembrane transporter activity”.
PPI network and Reactome analyses
To explore the potential associations among the DEGs, we created the PPI network by using 443 nodes and 780 edges. The combined score > 0.2 was set as a cutoff by using the Cytoscape software. Table 2 indicated the top ten genes with the highest scores. The top two significant modules were presented in Figure 3. We further analyzed the PPI and DEGs with a Reactome map (Figure 4) and identified the top ten biological processes including "Response of EIF2AK1 (HRI) to heme deficiency", "RUNX3 regulates WNT signaling", "Binding of TCF/LEF:CTNNB1 to target gene promoters", "RHO GTPases Activate Rhotekin and Rhophilins", "GRB2:SOS provides linkage to MAPK signaling for Integrins", "Attenuation phase", "p130Cas linkage to MAPK signaling for integrins", "Post-chaperonin tubulin folding pathway", and "Common Pathway of Fibrin Clot Formation" (Supplemental Table S1).