Soluble liver antigen (SLA) antibody detection by ELISA and multiplexing technologies

Abstract Objective: Develop and evaluate assays for the detection of antibodies to soluble liver antigen (SLA). SLA, also known as liver/pancreas antibody, was found to be 100% specific for autoimmune hepatitis (AIH) in a recent study of 2000 sera collected from individuals with various disease conditions and healthy individuals (Wies et al., Lancet 2000; 355:1510). Although SLA antibodies occur in only about 30% of patients with autoimmune hepatitis, they are found in some individuals with AIH who are negative for other autoantibodies. Methods: Specimens from patients with autoimmune hepatitis, non-autoimmune liver disease, various autoimmune conditions, as well as specimens from healthy i…