Abstract
Monkey-derived hyperimmune antisera against 40 peptides, together representing the entire envelope gp120 of HIV-1LAI, were used to map antibody-dependent cellular cytotoxicity (ADCC) target regions. Four regions corresponding to amino acids 65-126, 152-230, 248-330, and 445-466 were found to contain epitopes inducing ADCC activity not only against HIV-1LAI-infected cells but also against cells infected with HIV-1SF2 and clinical isolates of HIV-1. When comparing seroreactivity to the individual peptides with ADCC titers none of the regions seemed to be dominant. These results thus describe cross-reactive regions involved in the functional immunity against HIV-1 gp120.
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