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A stable hybridoma producing anti-HIV human monoclonal antibody (HMCA) was generated by fusing CD3-depleted human splenic lymphocytes from an HIV sero-positive donor with the mouse myeloma cell line P3x63AgU1. The resultant hybridoma has been secreting IgG1, lambda chain for over nine months at a rate of 2.5 micrograms/10(6)cells/day. The HMCA shows specific reactivity in ELISA using HIV-infected cell lysates. Immunofluorescence tests have indicated that this HMCA binds specifically to the surface of H9 and C3 HIV/HTLVIIIb infected cells, HIV/N1T infected CEM cells and to MoT cells infected with an HIV clinical isolate. Western blotting revealed recognition of glycoproteins 120 and 160 kDa of HIV by the HMCA. Although this HMCA demonstrated no neutralizing activity, the production of an anti-HIV HMCA specific for glycoprotein 120 kDa indicates the possibility that a neutralizing HMCA can be developed as further fusions with lymph nodes and spleens from HIV positive donors are performed.
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