Abstract
Antibodies against the RNase H domain of human hepatitis B virus P protein(s) are frequent markers of acute and chronic virus infection (T. Weimer, K. Weimer, Z.-X. Tu, M.-C. Jung, G. R. Pape, and H. Will, J. Immunol. 143:3750-3756, 1989). In the present study, these antibodies were determined in serial serum samples of experimentally infected chimpanzees and naturally infected human patients with acute and chronic hepatitis B virus infection. Anti-P antibodies were found in the sera of both chimpanzees and humans early in infection shortly after the immunoglobulin M anti-HBc response; they persisted in chronic carriers with ongoing viral replication but declined and disappeared at the time of virus clearance from the sera. These data demonstrate that antibodies to the RNase H domain of the hepatitis B virus P protein are early markers of infection and a signal of ongoing virus replication. Falling titers indicate the decline or end of active virus production and may therefore be a prognostic sign of virus elimination in natural infection and after antiviral therapy.
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