Objective To evaluate the efficacy of ursodeoxycholic acid (UDCA) alone or combined with immunosuppressant in primary biliary cirrhosis-autoimmune hepatitis overlap syndrome (PBC-AIH). Methods From January 2001 to December 2014, 41 patients with PBC-AIH were screened out from patients with autoimmune hepatitis (AIH) and retrospectively analyzed. According to their therapy, they were divided into UDCA alone group (n=20) and UDCA combined with immunosuppressant group (n=21). Before and after treatment, serum biochemical indicators, immune indicators and response rates of the two groups were compared. Rank sum test or t-test was performed for statistical analysis. Results After treatment for 12 months, the levels of globulin, alanine aminotransferase (ALT), aspartate transaminase (AST), alkaline phosphatase (ALP) and γ-glutamyl transferase (GGT) of UDCA alone group were all lower than those before treatment ((35.76±5.36) g/L vs (40.51±9.07) g/L, 32.5 U/L(12.0-149.9 U/L) vs 75.0 U/L(11.0-667.0 U/L), 34.0 U/L(8.0-77.9 U/L) vs 66.1 U/L(19.0-399.0 U/L), 134.0 U/L(63.0-389.7 U/L) vs 256.0 U/L(107.0-503.0 U/L), 78.0 U/L(12.0-444.0 U/L) vs 204.0 U/L(80.0-725.4 U/L)), and the differences were statistically significant (t=2.721, Z=-3.454, -3.421, -3.743 and -3.784; all P 0.05). Conclusions For PBC-AIH patients, in one year the remission of biochemical indicators is similar between UDCA alone and UDCA combined with immunosuppressant, however the level of IgG of UDCA combined with immunosuppressant group is lower than that of UDCA alone group. Key words: Hepatitis, autoimmune; Overlap syndrome; Ursodeoxycholic acid; Immunosuppressive agents; Efficacy
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