Nature Communications (Feb 2022)

Phagocytosis by an HIV antibody is associated with reduced viremia irrespective of enhanced complement lysis

  • David A. Spencer,
  • Benjamin S. Goldberg,
  • Shilpi Pandey,
  • Tracy Ordonez,
  • Jérémy Dufloo,
  • Philip Barnette,
  • William F. Sutton,
  • Heidi Henderson,
  • Rebecca Agnor,
  • Lina Gao,
  • Timothée Bruel,
  • Olivier Schwartz,
  • Nancy L. Haigwood,
  • Margaret E. Ackerman,
  • Ann J. Hessell

DOI
https://doi.org/10.1038/s41467-022-28250-7
Journal volume & issue
Vol. 13, no. 1
pp. 1 – 14

Abstract

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While antibodies neutralize HIV via Fab recognition of viral surface antigens, antibody Fc domains mediate effector functions, including antibody-dependent cellular phagocytosis (ADCP) and cytotoxicity (ADCC), and complement (C') activity. Here, Spencer et al. modify bNAb 10E8v4 to enhance C'-mediated potency in SHIV challenged rhesus macaques to probe its function in protection, showing that in the absence of neutralization, enhancing C' activities in vitro adds no value toward reducing viremia in either blood or tissue.