To assess whether demography is one of the important factors determining antibody response to nuclear antigens [ANA: SSA-Ro (52K and 60K), SSB-La, snRNPs (A, 70K, B'/B), and Cenp-B], we investigated 95 and 47 sera of autoimmune hepatitis (AIH) from North America and Asia, respectively, by immunofluorescent (IF) and recombinant ELISA. Correlations among nuclear IF patterns, ELISA, and disease indices were analyzed. The frequency and titer of individual antibodies differed significantly between the groups. Patients with speckled patterns were younger in both regions and had higher aspartate aminotransferase levels only in North America. HLA-A1, B8, DQ2, and DR4 or DR3 or both in North America, and A2, B61, DQ7, and DR4 in Asia were predominant. In Asia, B61 correlated with anti-70K, and DQ7 correlated with antibodies to 52K, Cenp-B, and B'/B. In North America, A1, B8, DR3 haplotype, and DQ2 correlated with antibodies to A and 70K. Anti-B'/B and DR4 in North America, and A2 in Asia, were associated with concurrent immunologic disorder. Individual ANA clusters correlated with individual HLA in the demography, and different HLA alleles might determine disease expression as well as different ANA being produced in AIH.
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