Germline-targeting HIV vaccination induces neutralizing antibodies to the CD4 binding site
Document Type
Journal Article
Publication Date
8-30-2024
Journal
Science immunology
Volume
9
Issue
98
DOI
10.1126/sciimmunol.adk9550
Abstract
Eliciting potent and broadly neutralizing antibodies (bnAbs) is a major goal in HIV-1 vaccine development. Here, we describe how germline-targeting immunogen BG505 SOSIP germline trimer 1.1 (GT1.1), generated through structure-based design, engages a diverse range of VRC01-class bnAb precursors. A single immunization with GT1.1 expands CD4 binding site (CD4bs)-specific VRC01-class B cells in knock-in mice and drives VRC01-class maturation. In nonhuman primates (NHPs), GT1.1 primes CD4bs-specific neutralizing serum responses. Selected monoclonal antibodies (mAbs) isolated from GT1.1-immunized NHPs neutralize fully glycosylated BG505 virus. Two mAbs, 12C11 and 21N13, neutralize subsets of diverse heterologous neutralization-resistant viruses. High-resolution structures revealed that 21N13 targets the same conserved residues in the CD4bs as VRC01-class and CH235-class bnAbs despite its low sequence similarity (~40%), whereas mAb 12C11 binds predominantly through its heavy chain complementarity-determining region 3. These preclinical data underpin the ongoing evaluation of GT1.1 in a phase 1 clinical trial in healthy volunteers.
APA Citation
Caniels, Tom G.; Medina-Ramìrez, Max; Zhang, Shiyu; Kratochvil, Sven; Xian, Yuejiao; Koo, Ja-Hyun; Derking, Ronald; Samsel, Jakob; van Schooten, Jelle; Pecetta, Simone; Lamperti, Edward; Yuan, Meng; Carrasco, María Ríos; Del Moral Sánchez, Iván; Allen, Joel D.; Bouhuijs, Joey H.; Yasmeen, Anila; Ketas, Thomas J.; Snitselaar, Jonne L.; Bijl, Tom P.; Martin, Isabel Cuella; Torres, Jonathan L.; Cupo, Albert; Shirreff, Lisa; Rogers, Kenneth; Mason, Rosemarie D.; Roederer, Mario; Greene, Kelli M.; Gao, Hongmei; Silva, Catarina Mendes; Baken, Isabel J.; and Tian, Ming, "Germline-targeting HIV vaccination induces neutralizing antibodies to the CD4 binding site" (2024). GW Authored Works. Paper 5410.
https://hsrc.himmelfarb.gwu.edu/gwhpubs/5410
Department
Microbiology, Immunology, and Tropical Medicine