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Genetic distinctions between autoimmune hepatitis in Italy and North America

World Journal of Gastroenterology 2005年第12期11卷 1862-1866页

作者： Paolo Muratori Albert J.Czaja Luigi Muratori Georgios Pappas Silvana Maccariello Fabio Cassani Alessandro Granito Rodolfo Ferrari Vilma Mantovani Marco Lenzi Francesco B.Bianchi Department of Internal Medicine Division of Gastroenterology and Hepatology Laboratorio Centralizzato Settore Genetica

AIM: Our goals were to analyze the known genetic predispositions for autoimmune hepatitis (AIH) in AIH Italian population and to compare them with North American counterparts. METHODS: Human leukocyte antigens (HLA) B8, C7, DR3, DR4, DR7, DR11, DR13, DQ2 and the B8-DR3-DQ2 phenotype were determined by microlymphocytotoxicity and polymerase chain reaction in 74 Italian patients (57 with type 1 and 17 with type 2 AIH) and 149 North American patients with type 1 AIH, and in adequate controls. RESULTS: B8-DR3-DQ2 occurred more frequently in Italian patients with type 1 AIH than in Italian controls (30% vs 7%, Ptype 1 AIH (23% vs 43%, P= 0.01) and in controls (16% vs 34%, P= 0.0003) than in North American counterparts. No differences were found in alleles' frequency between type 1 and type 2 Italian AIH patients. DR11 had a frequency lower in type 1 Italian AIH patients than controls (17% vs 35%, P= 0.01). CONCLUSION: HLA DR4 is not associated with AIH in Italy. The known HLA risk factors for AIH occur similarly in Italian patients with type 1 and type 2 AIH, and they are less frequent than in North American patients. B8-DR3-DQ2 is the predominant phenotype of type 1 AIH also in Italy, and HLA DR11 may be a regionally distinctive protective factor against type 1 AIH.

关键词： type 1 autoimmune hepatitis type 2 autoimmune hepatitis Human leukocyte antigen

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