Boosting of HIV-1 Neutralizing Antibody Responses by a Distally Related Retroviral Envelope Protein.
Författare
Summary, in English
Our knowledge of the binding sites for neutralizing Abs (NAb) that recognize a broad range of HIV-1 strains (bNAb) has substantially increased in recent years. However, gaps remain in our understanding of how to focus B cell responses to vulnerable conserved sites within the HIV-1 envelope glycoprotein (Env). In this article, we report an immunization strategy composed of a trivalent HIV-1 (clade B envs) DNA prime, followed by a SIVmac239 gp140 Env protein boost that aimed to focus the immune response to structurally conserved parts of the HIV-1 and simian immunodeficiency virus (SIV) Envs. Heterologous NAb titers, primarily to tier 1 HIV-1 isolates, elicited during the trivalent HIV-1 env prime, were significantly increased by the SIVmac239 gp140 protein boost in rabbits. Epitope mapping of Ab-binding reactivity revealed preferential recognition of the C1, C2, V2, V3, and V5 regions. These results provide a proof of concept that a distally related retroviral SIV Env protein boost can increase pre-existing NAb responses against HIV-1.
Avdelning/ar
Publiceringsår
2014
Språk
Engelska
Sidor
5802-5812
Publikation/Tidskrift/Serie
Journal of Immunology
Volym
192
Issue
12
Länkar
Dokumenttyp
Artikel i tidskrift
Förlag
American Association of Immunologists
Ämne
- Immunology in the medical area
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 1550-6606