Aggregate complexes of HIV-1 induced by multimeric antibodies.

Published

Journal Article

Antibody mediated viral aggregation may impede viral transfer across mucosal surfaces by hindering viral movement in mucus, preventing transcytosis, or reducing inter-cellular penetration of epithelia thereby limiting access to susceptible mucosal CD4 T cells and dendritic cells. These functions may work together to provide effective immune exclusion of virus from mucosal tissue; however little is known about the antibody characteristics required to induce HIV aggregation. Such knowledge may be critical to the design of successful immunization strategies to facilitate viral immune exclusion at the mucosal portals of entry.The potential of neutralizing and non-neutralizing IgG and IgA monoclonals (mAbs) to induce HIV-1 aggregation was assessed by Dynamic light scattering (DLS). Although neutralizing and non-neutralizing IgG mAbs and polyclonal HIV-Ig efficiently aggregated soluble Env trimers, they were not capable of forming viral aggregates. In contrast, dimeric (but not monomeric) IgA mAbs induced stable viral aggregate populations that could be separated from uncomplexed virions. Epitope specificity influenced both the degree of aggregation and formation of higher order complexes by dIgA. IgA purified from serum of uninfected RV144 vaccine trial responders were able to efficiently opsonize viral particles in the absence of significant aggregation, reflective of monomeric IgA.These results collectively demonstrate that dIgA is capable of forming stable viral aggregates providing a plausible basis for testing the effectiveness of aggregation as a potential protection mechanism at the mucosal portals of viral entry.

Full Text

Duke Authors

Cited Authors

  • Stieh, DJ; King, DF; Klein, K; Liu, P; Shen, X; Hwang, KK; Ferrari, G; Montefiori, DC; Haynes, B; Pitisuttithum, P; Kaewkungwal, J; Nitayaphan, S; Rerks-Ngarm, S; Michael, NL; Robb, ML; Kim, JH; Denny, TN; Tomaras, GD; Shattock, RJ

Published Date

  • October 2, 2014

Published In

Volume / Issue

  • 11 /

Start / End Page

  • 78 -

PubMed ID

  • 25274446

Pubmed Central ID

  • 25274446

Electronic International Standard Serial Number (EISSN)

  • 1742-4690

International Standard Serial Number (ISSN)

  • 1742-4690

Digital Object Identifier (DOI)

  • 10.1186/s12977-014-0078-8

Language

  • eng