Abstract
A heterologous Ad26/MVA vaccine was given prior to an analytic treatment interruption (ATI) in people living with HIV-1 (mainly CRF01_AE) who initiated antiretroviral treatment (ART) during acute HIV-1. We investigate the impact of Ad26/MVA vaccination on antibody (Ab)-mediated immune responses and their effect on time to viral rebound. The vaccine mainly triggers vaccine-matched binding Abs while, upon viral rebound post ATI, infection-specific CRF01_AE binding Abs increase in all participants. Binding Abs are not associated with time to viral rebound. The Ad26/MVA mosaic vaccine profile consists of correlated non-CRF01_AE binding Ab and Fc effector features, with strong Ab-dependent cellular phagocytosis (ADCP) responses. CRF01_AE-specific ADCP responses (measured either prior to or post ATI) are significantly higher in individuals with delayed viral rebound. Our results suggest that vaccines eliciting cross-reactive responses with circulating viruses in a target population could be beneficial and that ADCP responses may play a role in viral control post treatment interruption.
Original language | English |
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Article number | 114344 |
Journal | Cell Reports |
Volume | 43 |
Issue number | 6 |
DOIs | |
State | Published - 25 Jun 2024 |
Externally published | Yes |
Keywords
- ADCP
- CP: Immunology
- CP: Microbiology
- Fc effector responses
- HIV-1
- PLWH
- acute infection
- analytic treatment interruption
- antibody responses
- time to viral rebound
- vaccine