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Viral Envelope Evolution in Simian–HIV-Infected Neonate and Adult-Dam Pairs of Rhesus Macaques

Journal Article · · Viruses
DOI:https://doi.org/10.3390/v16071014· OSTI ID:2470525
 [1];  [2];  [3];  [2];  [4];  [3]
  1. Fred Hutchinson Cancer Center, Seattle, WA (United States)
  2. Univ. of Pennsylvania, Philadelphia, PA (United States)
  3. Duke Univ. School of Medicine, Durham, NC (United States)
  4. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Duke Univ. School of Medicine, Durham, NC (United States)
We recently demonstrated that Simian–HIV (SHIV)-infected neonate rhesus macaques (RMs) generated heterologous HIV-1 neutralizing antibodies (NAbs) with broadly-NAb (bNAb) characteristics at a higher frequency compared with their corresponding dam. Here, we characterized genetic diversity in Env sequences from four neonate or adult/dam RM pairs: in two pairs, neonate and dam RMs made heterologous HIV-1 NAbs; in one pair, neither the neonate nor the dam made heterologous HIV-1 NAbs; and in another pair, only the neonate made heterologous HIV-1 NAbs. Phylogenetic and sequence diversity analyses of longitudinal Envs revealed that a higher genetic diversity, within the host and away from the infecting SHIV strain, was correlated with heterologous HIV-1 NAb development. We identified 22 Env variable sites, of which 9 were associated with heterologous HIV-1 NAb development; 3/9 sites had mutations previously linked to HIV-1 Env bNAb development. These data suggested that viral diversity drives heterologous HIV-1 NAb development, and the faster accumulation of viral diversity in neonate RMs may be a potential mechanism underlying bNAb induction in pediatric populations. Moreover, these data may inform candidate Env immunogens to guide precursor B cells to bNAb status via vaccination by the Env-based selection of bNAb lineage members with the appropriate mutations associated with neutralization breadth.
Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
89233218CNA000001
OSTI ID:
2470525
Journal Information:
Viruses, Journal Name: Viruses Journal Issue: 7 Vol. 16; ISSN 1999-4915
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

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