Institut Pasteur

Centre National De La Recherche Scientifique

Institut Pasteur and Centre Nationale De La Recherche Scientifique

Anne G Laurent-Crawford

Luc Montagnier

Bernard Krust

Ara G Hovanessian

Marie-Anne Rey-Cuillé

Marie-Anne Rey Cuille

Four glycoproteins of apparent molecular weights 300,000, 140,000, 125,000, and 36,000 (gp300, gp140, gp125, and gp36) are detectable in human immunodeficiency virus type 2 (HIV-2) infected cells. The gp125 and gp36 are the external and transmembrane components, respectively, of the envelope glycoproteins of HIV-2 mature virions. The gp300, which is a dimeric form of gp140, the precursor of HIV-2 envelope glycoprotein, is probably formed by a pH dependent fusion in the endoplasmic reticulum. Such a doublet is also observed in cells infected with simian immunodeficiency virus (SIV), a virus closely related to HIV-2. On the other hand, the envelope glycoprotein precursor of HIV-1 does not form a dimer during its processing. Experiments carried out with various inhibitors of oligosaccharide trimming enzymes suggest that transient dimerization of the glycoprotein precursor is required for its efficient transport to the Golgi apparatus and for its processing. The gp300 is useful for detecting antibodies to HIV-2 antigens in human body fluids and for raising antibodies to gp300.

Immunogenic compositions comprising human immunodeficiency virus type 2 (HIV-2) glycosylated and unglycosylated envelope proteins and their methods of preparation

Immunological reagents obtained from multimeric forms of the HIV-2 and SIV envelope glycoproteins and their use in the detection of HIV-2, particularly, the HIV-2 proteins gp300, p200, p90, and p80, and gp300 of SIV.

Immunological reagents and diagnostic methods for the detection of human immunodeficiency virus type 2 utilizing multimeric forms of the envelope proteins GP300, P200, and P90/80

This invention is directed to a composition comprising one or more human immunodeficiency virus type 2 (HIV-2) envelope proteins and a pharmaceutically acceptable carrier. The proteins of the claimed invention are gp300, p200 and p90/80 of HIV-2. The composition is useful for the diagnostic assay of HIV-2 and as an antigen for the production of antibodies, for example.

Immunogenic compositions comprising glycosylated and deglycosylated

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Paris, France

Anne G Laurent-Crawford