Article
作者: Steichen, Jon M ; Sutton, Henry J ; Phung, Ivy ; Bosinger, Steven E ; Kalyuzhniy, Oleksandr ; Liguori, Alessia ; Ma, Krystal M ; Schultze, Steven E ; Burton, Dennis R ; Schiffner, Torben ; Crotty, Shane ; Mullen, Tina-Marie ; Paulson, James C ; Yates, John R ; Rodriguez, Oscar L ; Watson, Corey T ; Ward, Andrew B ; Madden, Patrick J ; Burns, Alison ; Lee, Jeong Hyun ; Cottrell, Christopher A ; Mopuri, Rohini ; Torres, Jonathan L ; Allen, Joel D ; Adachi, Yumiko ; Barman, Shawn ; Schief, William R ; Metz, Amanda ; Shields, Kaitlyn ; Saha, Swati ; Diedrich, Jolene K ; Salcedo, Eugenia ; Altheide, Tasha K ; Sok, Devin ; Baboo, Sabyasachi ; Georgeson, Erik ; Ozorowski, Gabriel ; Willis, Jordan R ; Kubitz, Michael ; Crispin, Max ; Smith, Melissa L
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.