Objective: To evaluate the value of measurement of M2 autoantibodies in diagnosis of primary biliary cirrhosis (PBS).
Methods: M2 autoantibodies were detected by ELISA combined with western-blot.
Results: Thirty-two cases presented positive M2 autoantibodies, including 20 cases of PBC, 9 liver diseases of unknown etiology, 1 autoimmune hepatitis and 1 drug-induced liver injury.
Conclusions: M2 autoantibodies show good sensitivity and specificity to diagnosis of PBC. It should be used as a powerful and specific maker for the diagnosis of PBC