Abstract
Recombinant interleukin (IL-2) was administered to 16 patients with HBe antigen-positive chronic active hepatitis in which the diagnosis was ascertained histologically. In 7 of the 16 patients, a decrement of the serum HBe antigen value was observed (Group A). In group A, the findings showed an increment of peripheral Leu 11-positive cells and NK and LAK cell activity, an acute exacerbation during and after IL-2 administration, disappearance of HBc antigen observed in liver biopsy histology, and decrement of serum DNA-p activity. However, seroconversion of HBs antigen was not observed and no case showed the elimination status of continuous HB virus infection. On the other hand, in the other 9 patients (Group B), these changes were not observed and the existence of a HLA type difference between Group A and B was shown by HLA analysis. These results indicated that the immune responses mediated by IL-2 may play an important role in the development of chronic hepatitis B, and these results may be regulated genetically.
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