Human and murine monoclonal antibodies directed against a conserved sequence from gp41 (aa583-599) of human immunodeficiency virus type 1 Academic Article Article uri icon


MeSH Major

  • Antibodies, Neutralizing
  • HIV Antibodies
  • HIV Envelope Protein gp120


  • Human spleen cells from an HIV-seropositive donor were immunized in vitro with the aa583-599 peptide conjugated to an heptalysyl core. This sequence was derived from the putatively HIV-immunosuppressive region of HIV1 gp41. The same conjugated peptide was used to immunize mice. One human and one mouse IgM monoclonal antibody (mAb) directed against the aa583-599 peptide were obtained. The two mAb had distinct patterns of reactivity against a panel of 42 peptides with modified sequences. Neither of the mAb inhibited the immunosuppressive effect of aa583-599 octopus-lys-conjugated peptide on anti-CD3 Ab-induced lymphoproliferation. In addition, both mAb did not neutralize cell-free virus transmission or enhance HIV infection. However, HmAb inhibited formation of syncytia between HIV1-infected (but not HIV2-infected cells) and non-infected target cells at concentrations above 20 micrograms/ml, whereas MmAb did not have any effect. The degree of conservation of the aa583-599 region makes HmAb a candidate for use as a group-specific reagent in future HIV1 passive immunotherapy protocols.

publication date

  • January 1992



  • Academic Article


Digital Object Identifier (DOI)

  • 10.1016/S0923-2516(06)80102-0

PubMed ID

  • 1381515

Additional Document Info

start page

  • 179

end page

  • 91


  • 143


  • C