Abstract：
:The Fc region of HIV-1 Env-specific broadly neutralizing antibodies (bNAbs) is required for suppressing viraemia, through mechanisms which remain poorly understood. Here, we identify bNAbs that exert antibody-dependent cellular cytotoxicity (ADCC) in cell culture and kill HIV-1-infected lymphocytes through natural killer (NK) engagement. These antibodies target the CD4-binding site, the glycans/V3 and V1/V2 loops on gp120, or the gp41 moiety. The landscape of Env epitope exposure at the surface and the sensitivity of infected cells to ADCC vary considerably between viral strains. Efficient ADCC requires sustained cell surface binding of bNAbs to Env, and combining bNAbs allows a potent killing activity. Furthermore, reactivated infected cells from HIV-positive individuals expose heterogeneous Env epitope patterns, with levels that are often but not always sufficient to trigger killing by bNAbs. Our study delineates the parameters controlling ADCC activity of bNAbs, and supports the use of the most potent antibodies to clear the viral reservoir.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Bruel T,Guivel-Benhassine F,Amraoui S,Malbec M,Richard L,Bourdic K,Donahue DA,Lorin V,Casartelli N,Noël N,Lambotte O,Mouquet H,Schwartz Odoi
10.1038/ncomms10844subject
Has Abstractpub_date
2016-03-03 00:00:00pages
10844issn
2041-1723pii
ncomms10844journal_volume
7pub_type
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