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Published June 18, 2015 | Accepted Version + Supplemental Material
Journal Article Open

Immunization for HIV-1 Broadly Neutralizing Antibodies in Human Ig Knockin Mice

Abstract

A subset of individuals infected with HIV-1 develops broadly neutralizing antibodies (bNAbs) that can prevent infection, but it has not yet been possible to elicit these antibodies by immunization. To systematically explore how immunization might be tailored to produce them, we generated mice expressing the predicted germline or mature heavy chains of a potent bNAb to the CD4 binding site (CD4bs) on the HIV-1 envelope glycoprotein (Env). Immunogens specifically designed to activate B cells bearing germline antibodies are required to initiate immune responses, but they do not elicit bNAbs. In contrast, native-like Env trimers fail to activate B cells expressing germline antibodies but elicit bNAbs by selecting for a restricted group of light chains bearing specific somatic mutations that enhance neutralizing activity. The data suggest that vaccination to elicit anti-HIV-1 antibodies will require immunization with a succession of related immunogens.

Additional Information

© 2015 Elsevier Inc. Received May 11, 2015; Revised May 29, 2015; Accepted May 29, 2015; Published June 18, 2015. We thank Chingwen Yang, Dorjee Shola, and Rada Norinsky for their contribution in the generation of the knockin mice; Thomas Eisenreich, David Bosque, and Susan Hinklein for assistance with the mice; Klara Velinzon and Neena Thomas for assistance with single-cell FACS sorting; Zoran Jankovic for laboratory support; Alex Robles for technical assistance with the HIV-1 TZMbl neutralization assays; and Anthony West for advice regarding the selection of the HIV-1 virus panels. This work was supported by grants from NIH Center for HIV/AIDS Vaccine Immunology and Immunogen Discovery (CHAVI-ID) UM1 AI100663 (M.C.N., W.R.S., and R.W.S.), Bill and Melinda Gates Foundation grant OPP1033115(M.C.N.),NIH grant AI037526 (M.C.N.), the International AIDS Vaccine Initiative Neutralizing Antibody Consortium and Center (W.R.S.), and by BMGF CAVD funding for the IAVI NAC Center (W.R.S.). This work was also supported by NIH grant U19 AI109632 (M.C.N. and L.S.), HIVRAD/P01 AI094419-01 (L.S.), HIVRAD/P01 AI082362 (J.P.M. and R.W.S.), HIVRAD/P01 AI100148 (P.J.B. and M.C.N.), Bill and Melinda Gates Foundation grant 1032144 (M.S.S.), and the Aids Fonds Netherlands, grant 2012041 (M.J.v.G.). P.D. is supported by an international postdoctoral fellowship from the Swedish Research Council. L.v.B. is supported by The Rockefeller University Center for Clinical and Translational SciencegrantUL1TR000043/KL2TR000151fromtheNational Center for Advancing Translational Sciences (NCATS). A.D.G. is supported by MSTP grant T32GM07739 to the Weill Cornell/ Rockefeller/ Sloan-Kettering Tri-Institutional MD-PhD Program. A.M. is supported by a Canadian Institutes of Health Research Fellowship. R.W.S. is a recipient of a Vidi grant from the Netherlands Organization for Scientific Research (NWO) and a Starting Investigator Grant from the European Research Council (ERC-StG-2011–280829-SHEV). M.C.N. and P.J.B. are Howard Hughes Medical Institute Investigators.

Attached Files

Accepted Version - nihms697427.pdf

Supplemental Material - mmc1.xlsx

Supplemental Material - mmc2.xlsx

Supplemental Material - mmc3.xlsx

Supplemental Material - mmc4.xlsx

Supplemental Material - mmc5.xlsx

Supplemental Material - mmc6.xlsx

Supplemental Material - mmc7.pdf

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