Article
作者: Barman, Shawn ; Paulson, James C ; Kalyuzhniy, Oleksandr ; Burns, Alison ; Diedrich, Jolene K ; Shields, Kaitlyn ; Sutton, Henry J ; Adachi, Yumiko ; Allen, Joel D ; Burton, Dennis R ; Georgeson, Erik ; Lee, Jeong Hyun ; Smith, Melissa L ; Mopuri, Rohini ; Salcedo, Eugenia ; Crispin, Max ; Ma, Krystal M ; Bosinger, Steven E ; Phung, Ivy ; Rodriguez, Oscar L ; Ozorowski, Gabriel ; Schultze, Steven E ; Mullen, Tina-Marie ; Madden, Patrick J ; Kubitz, Michael ; Cottrell, Christopher A ; Willis, Jordan R ; Ward, Andrew B ; Torres, Jonathan L ; Crotty, Shane ; Altheide, Tasha K ; Saha, Swati ; Sok, Devin ; Schief, William R ; Schiffner, Torben ; Watson, Corey T ; Yates, John R ; Metz, Amanda ; Steichen, Jon M ; Liguori, Alessia ; Baboo, Sabyasachi
Germline-targeting immunogens hold promise for initiating the induction of broadly neutralizing antibodies (bnAbs) to HIV and other pathogens. However, antibody-antigen recognition is typically dominated by heavy chain complementarity determining region 3 (HCDR3) interactions, and vaccine priming of HCDR3-dominant bnAbs by germline-targeting immunogens has not been demonstrated in humans or outbred animals. In this work, immunization with N332-GT5, an HIV envelope trimer designed to target precursors of the HCDR3-dominant bnAb BG18, primed bnAb-precursor B cells in eight of eight rhesus macaques to substantial frequencies and with diverse lineages in germinal center and memory B cells. We confirmed bnAb-mimicking, HCDR3-dominant, trimer-binding interactions with cryo–electron microscopy. Our results demonstrate proof of principle for HCDR3-dominant bnAb-precursor priming in outbred animals and suggest that N332-GT5 holds promise for the induction of similar responses in humans.