AKT1 and gastric cancer: In this study, we screened for the differentially expressed miRNAs in gastric cancer patient serum-derived exosomes by high-throughput sequencing and found by KEGG pathway analysis that some target genes of the differentially expressed miRNAs were involved in the regulation of angiogenesis-related signalling pathways, such as the PI3K-AKT and Rap1 pathways.