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J Infect Dis. 2004 Jan 1;189(1):71-4. Epub 2003 Dec 31.

Potent cross-group neutralization of primary human immunodeficiency virus isolates with monoclonal antibodies--implications for acquired immunodeficiency syndrome vaccine.

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Department of Cancer Immunology and AIDS, Dana-Farber Cancer Institute, and Department of Medicine, Harvard Medical School, Boston, Massachusetts, USA.


Human immunodeficiency virus type 1 (HIV-1) is phylogenetically classified into groups and clades (or subtypes). Human neutralizing monoclonal antibodies (nMAbs), originally isolated from individuals infected with HIV-1 group M-clade B, neutralized not only primary HIV-1 clade B isolates in vitro but also primary isolates of other group M clades (A, C, D, E, and F). This corrected the previously held notion that primary HIV-1 isolates are resistant to neutralizing antibodies. Here we show that anti-HIV-1 group M-clade B nMAbs potently neutralized primary isolates of the phylogenetically distant HIV-1 group O. We and others have previously shown that passive immunization with human nMAbs protected adult or neonatal primates against infection with simian-human immunodeficiency virus strains encoding HIV-1 group M-clade B envelope genes. The in vitro cross-group neutralization shown here underscores the broad potential of these nMAbs against divergent virus variants and the relevance of their epitopes in the design of acquired immunodeficiency syndrome vaccines.

[Indexed for MEDLINE]

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