AIM: To investigate the expression and regulation of A20 in healthy individuals and the patients with systemic lupus erythematosus( SLE). METHODS: The expression levels of A20,NF-κB,MALT1,and MALT1V1 in peripheral blood mononuclear cells( PBMC) of the patients with SLE( including 2 cases with scleroderma,1 case with rheumatoid arthritis,and 1 case with lymphoma) were analyzed by real-time PCR. RESULTS: A significantly lower A20 expression level was found in the PBMC from SLE group compared with the healthy ...