Isolation of HIV-1-neutralizing mucosal monoclonal antibodies from human colostrum.

Published

Journal Article

BACKGROUND: Generation of potent anti-HIV antibody responses in mucosal compartments is a potential requirement of a transmission-blocking HIV vaccine. HIV-specific, functional antibody responses are present in breast milk, and these mucosal antibody responses may play a role in protection of the majority of HIV-exposed, breastfeeding infants. Therefore, characterization of HIV-specific antibodies produced by B cells in milk could guide the development of vaccines that elicit protective mucosal antibody responses. METHODS: We isolated B cells from colostrum of an HIV-infected lactating woman with a detectable neutralization response in milk and recombinantly produced and characterized the resulting HIV-1 Envelope (Env)-specific monoclonal antibodies (mAbs). RESULTS: The identified HIV-1 Env-specific colostrum mAbs, CH07 and CH08, represent two of the first mucosally-derived anti-HIV antibodies yet to be reported. Colostrum mAb CH07 is a highly-autoreactive, weakly-neutralizing gp140-specific mAb that binds to linear epitopes in the gp120 C5 region and gp41 fusion domain. In contrast, colostrum mAb CH08 is a nonpolyreactive CD4-inducible (CD4i) gp120-specific mAb with moderate breadth of neutralization. CONCLUSIONS: These novel HIV-neutralizing mAbs isolated from a mucosal compartment provide insight into the ability of mucosal B cell populations to produce functional anti-HIV antibodies that may contribute to protection against virus acquisition at mucosal surfaces.

Full Text

Duke Authors

Cited Authors

  • Friedman, J; Alam, SM; Shen, X; Xia, S-M; Stewart, S; Anasti, K; Pollara, J; Fouda, GG; Yang, G; Kelsoe, G; Ferrari, G; Tomaras, GD; Haynes, BF; Liao, H-X; Moody, MA; Permar, SR

Published Date

  • 2012

Published In

Volume / Issue

  • 7 / 5

Start / End Page

  • e37648 -

PubMed ID

  • 22624058

Pubmed Central ID

  • 22624058

Electronic International Standard Serial Number (EISSN)

  • 1932-6203

Digital Object Identifier (DOI)

  • 10.1371/journal.pone.0037648

Language

  • eng

Conference Location

  • United States