(A) Volcano plot of the computed log2 fold change and P-values for all the expressed genes in RA versus OA fibroblast-like synoviocytes (t test), where the six genes with the highest P-values were marked. Genes were labeled as down-regulated in RA, up-regulated in RA, or non-significant (NS). (B) Most enriched pathways of the differentially expressed genes in RA versus OA fibroblast-like synoviocytes (1,093 genes with tdiff-expr
> 2), combined from GO (28), KEGG (29), and Reactome (30), ranked by adjusted P-values.