Two Distinct Broadly Neutralizing Antibody Specificities of Different Clonal Lineages in a Single HIV-1-Infected Donor: Implications for Vaccine Design

Mattia Bonsignori, David C. Montefiori, Xueling Wu, Xi Chen, Kwan-Ki Hwang, Chun-Yen Tsao, Daniel M. Kozink, Robert J. Parks, Georgia D. Tomaras, John A. Crump, Saidi H. Kapiga, Noel E. Sam, Peter D. Kwong, Thomas B. Kepler, Hua-Xin Liao, John R. Mascola and Barton F. Haynes. J
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Plasma from a small subset of subjects chronically infected with HIV-1 shows remarkable magnitude and breadth of neutralizing activity. From one of these individuals (CH0219), we isolated two broadly neutralizing antibodies (bnAbs), CH01 and VRC-CH31, from two clonal lineages of memory B cells with distinct specificities (variable loop 1 and 2 [V1V2] conformational specificity and CD4-binding site specificity, respectively) that recapitulate 95% of CH0219 serum neutralization breadth. These data provide proof of concept for an HIV-1 vaccine that aims to elicit bnAbs of multiple specificities.