ArticlebioRxiv : the preprint server for biology2025
Rapid elicitation of a new class of neutralizing N332-glycan independent V3-glycan antibodies against HIV-1 in nonhuman primates.
Article in bioRxiv : the preprint server for biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Sequential immunization is a promising approach to elicit broadly neutralizing antibodies (bNAbs) against the HIV-1 Envelope (Env). However, available protocols are inefficient and involve multiple immunizations over long periods of time. Here, we present WIN332, a new engineered Env-immunogen that induces a new class of neutralizing N332-glycan-independent antibodies to the conserved V3-glycan epitope of Env after a single bolus immunization in nonhuman primates. WIN332 binds to precursors of canonical human N332-glycan-dependent (Type-I) V3-glycan bNAbs but also of a first-of-its-class N332-glycan-independent (Type-II) V3-glycan bNAb. A single immunization elicits neutralizing serum and monoclonal antibodies that are boosted and affinity matured with a heterologous immunogen. EMPEM analysis of serum antibodies, antibody cloning and cryo-EM analysis reveal that WIN332 elicits N332-glycan-independent antibodies with remarkable sequence and binding similarities with the most potent human type-I and type-II V3-glycan bNAbs. Thus, WIN332 is a promising vaccine candidate to streamline V3-glycan bNAb elicitation.
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