AKT1 and rheumatoid arthritis: The KEGG pathway analysis indicated that these DEcircRNAs might be responsible for the pathophysiology of RA by regulating metabolic pathways, ECM–receptor interactions, the PI3K–Akt signalling pathway, the AMPK signalling pathway, regulation of the actin cytoskeleton, protein processing in the endoplasmic reticulum, leukocyte transendothelial migration, platelet activation, the cAMP signalling pathway and the Ras signalling pathway.