Natural antibodies (Abs) can target host glycans on the surface of pathogens. We studied the evolution of glycan-reactive B cells of rhesus macaques and humans using glycosylated HIV-1 envelope (Env) as a model antigen. 2G12 is a broadly neutralizing Ab (bnAb) that targets a conserved glycan patch on Env of geographically diverse HIV-1 strains using a unique heavy-chain (VH) domain-swapped architecture that results in fragment antigen-binding (Fab) dimerization. Here, we describe HIV-1 Env Fab-dimerized glycan (FDG)-reactive bnAbs without VH-swapped domains from simian-human immunodeficiency virus (SHIV)-infected macaques. FDG Abs also recognized cell-surface glycans on diverse pathogens, including yeast and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike. FDG precursors were expanded by glycan-bearing immunogens in macaques and were abundant in HIV-1-naive humans. Moreover, FDG precursors were predominately mutated IgM+IgD+CD27+, thus suggesting that they originated from a pool of antigen-experienced IgM+ or marginal zone B cells.
- MeSH
- B-lymfocyty imunologie MeSH
- COVID-19 imunologie MeSH
- dimerizace MeSH
- epitopy imunologie MeSH
- genové produkty env - virus lidské imunodeficience chemie genetika imunologie MeSH
- glykoprotein S, koronavirus imunologie MeSH
- glykosylace MeSH
- HIV infekce imunologie MeSH
- HIV protilátky imunologie MeSH
- HIV-1 imunologie MeSH
- imunoglobuliny - Fab fragmenty chemie imunologie MeSH
- lidé MeSH
- Macaca mulatta MeSH
- neutralizující protilátky imunologie MeSH
- polysacharidy chemie imunologie MeSH
- receptory antigenů B-buněk chemie MeSH
- SARS-CoV-2 imunologie MeSH
- široce neutralizující protilátky imunologie MeSH
- vakcíny imunologie MeSH
- virus opičí imunodeficience genetika imunologie MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Research Support, N.I.H., Extramural MeSH
