title: Cross-neutralizing antibodies against HIV-1 (HTLV-IIIB and HTLV-IIIRF) and HIV-2 (SBL-6669 and a new isolate SBL-K135).
abstract: A total of 57 HIV-1 antibody-positive sera and 43 HIV-2 antibody-positive sera were all tested for neutralizing capacity against two HIV-1 isolates (HTLV-IIIB and HTLV-IIIRF) and two HIV-2 isolates (SBL-6669 and SBL-K135). SBL-K135 is a new HIV-2 isolate obtained from a patient with clinical AIDS from Guinea-Bissau. Among the HIV-1--positive sera, 84% neutralized any of the HIV-1 isolates, 67% neutralized both HIV-1 isolates, and 35% neutralized any of the HIV-2 isolates. Among the HIV-2--positive sera, 91% neutralized any of the HIV-2 isolates, 67% neutralized both HIV-2 isolates, and 37% neutralized any of the HIV-1 isolates. Thus, neutralizing antibodies in HIV-1-- and HIV-2--positive sera can be cross-reacting, type-specific, or strain-specific. The cross-neutralizing titers were lower than the neutralizing titers against the type-specific viral isolates. The presence of cross-neutralizing antibodies was related to the presence of neutralizing antibodies against both type-specific isolates.
authors.affiliation: Department of Immunology, National Bacteriological Laboratory, Stockholm, Sweden.
authors.forename: B
authors.initials: B
authors.lastname: Böttiger
authors.forename: A
authors.initials: A
authors.lastname: Karlsson
authors.forename: P A
authors.initials: PA
authors.lastname: Andreasson
authors.forename: A
authors.initials: A
authors.lastname: Naucler
authors.forename: C M
authors.initials: CM
authors.lastname: Costa
authors.forename: G
authors.initials: G
authors.lastname: Biberfeld
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000175:diagnosis*; D000328:Adult; D015153:Blotting, Western; D003429:Cross Reactions; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D015483:HIV Antibodies / Q000276:immunology*; D015497:HIV-1 / Q000276:immunology*; D015498:HIV-2 / Q000276:immunology*; D006801:Humans; D007106:Immune Sera; D009500:Neutralization Tests
chemical_list: D015483:HIV Antibodies; D007106:Immune Sera