RESUMO
Background: Gastric cancer, especially intestinal-type gastric cancer, is considered as the result of the process of non-atrophic gastritis-atrophic gastritis-dysplasia-carcinogenesis. Aims: To explore the phenotypic characteristics and differentially expressed genes (DEGs) enrichment pathway of inflammatory cells between gastritis that prone to canceration (atrophic gastritis) and gastritis that not prone to canceration (non-atrophic gastritis). Methods: The datasets of GSE2669, GSE83389, GSE106656 and GSE27411 were downloaded from GEO database. DEGs were screened by R language and verified by GSE116312 dataset. DEGs screened from 3 datasets of 'non-atrophic gastritis-atrophic gastritis' were overlapped with inflammatory cell phenotypic characteristic genes. REACTOME and KEGG analyses of DEGs were performed. Results: A variety of DEGs in the 'normal gastric mucosa-non-atrophic gastritis-atrophic gastritis' dynamic process were screened, and 5 common genes were verified by GSE116312 dataset. A total of 85 inflammatory cell phenotypic characteristic genes were screened from 3 datasets. The percentage of neutrophil was high during 'normal gastric mucosa-non-atrophic gastritis' process while the percentages of fibroblast and macrophage were high during 'non-atrophic gastritis-atrophic gastritis' process. REACTOME and KEGG analyses showed that DEGs of inflammatory cell phenotype during 'non-atrophic gastritis-atrophic gastritis' process were mainly enriched in IL-10, IL-4 and IL-13 signaling pathways and antigen presentation pathway. Conclusions: Macrophage, neutrophil and fibroblast are the inflammatory cell phenotypic characteristics of gastritis with cancerous potential, which enriched in IL and antigen presentation pathways.