1. Long trimer-immunization interval and appropriate adjuvant reduce immune responses to the soluble HIV-1-envelope trimer base
- Author
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Hongying Duan, Angela R. Corrigan, Cheng Cheng, Andrea Biju, Christopher A. Gonelli, Adam S. Olia, I-Ting Teng, Kai Xu, Sijy O’Dell, Sandeep Narpala, Mike Castro, Leonid Serebryannyy, Jennifer Wang, Danealle K. Parchment, Edward K. Sarfo, Jelle van Schooten, John-Paul Todd, Shuishu Wang, Darcy R. Harris, Hui Geng, Alexander J. Jafari, Ruth A. Woodward, Nicole A. Doria-Rose, Kathryn E. Foulds, Adrian B. McDermott, Marit J. van Gils, Richard A. Koup, Theodore C. Pierson, Peter D. Kwong, and John R. Mascola
- Subjects
Immune response ,Virology ,Immunology ,Science - Abstract
Summary: Soluble ‘SOSIP’-stabilized HIV-1 envelope glycoprotein (Env) trimers elicit dominant antibody responses targeting their glycan-free base regions, potentially diminishing neutralizing responses. Previously, using a nonhuman primate model, we demonstrated that priming with fusion peptide (FP)-carrier conjugate immunogens followed by boosting with Env trimers reduced the anti-base response. Further, we demonstrated that longer immunization intervals further reduced anti-base responses and increased neutralization breadth. Here, we demonstrate that long trimer-boosting intervals, but not long FP immunization intervals, reduce the anti-base response. Additionally, we identify that FP priming before trimer immunization enhances antibody avidity to the Env trimer. We also establish that adjuvants Matrix M and Adjuplex further reduce anti-base responses and increase neutralizing titers. FP priming, long trimer-immunization interval, and an appropriate adjuvant can thus reduce anti-base antibody responses and improve Env-directed vaccine outcomes.
- Published
- 2024
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