Association between hepatitis B virus infection and HLA-DR type in Korea

Although the mechanism of susceptibility to chronic persistent hepatitis B virus (HBV) infection is not well clarified, immunogenetic factors of the h ost may have a role. Recently a strong association between HLA-DR13 and the self-limited course of HBV infection has been reported. To determine wheth er the elimination of HBV is related to a particular HLA allele, we studied the HBV markers and HLA-DR Phenotypes of 1,272 Koreans who had visited Yon sei University Medical Center for renal transplantation. They included 330 renal transplant donors, Subjects were categorized into 3 different groups: the "Unexposed Group" (UE; n 946) with negative HBV markers, the "Chronic Carrier Group" (CC; n = 83), who were hepatitis B surface antigen (HBsAg)-p ositive, and the "Spontaneously Cleared Group" (SC; n = 243), who were HBsA g-negative with antibodies to HBsAg (anti-HBs) and hepatitis B core antigen (anti-HBc). HLA-DR4 was the most common type in all groups. HLA-DR6 was si gnificantly more frequent in 69 of 243 subjects with SC (28.4%) than in 8 o f 83 subjects with CC (9.6%) (P < .001; relative risk [RR] = 3.72). HLA-DR9 was significantly more frequent in CC than in SC (P < .001; RR = 0.33). HL A-DR13 showed a stronger association with the clearance of HBV than the oth er HLA-DRG subgroup. The distribution of HLA-DR phenotypes was similar rega rdless of renal disease. Our data indicate that HLA-DRG, especially HLA-DR1 3, is one of the host factors, which influences the immune response to HBV, and may be associated with self-elimination of HBV in Koreans.