Elephant in the Room: Natural Killer Cells Don't Forget HIV Either

Overview

Journal Curr Opin HIV AIDS

Specialty Infectious Diseases

Date 2025 Jan 8

PMID 39773904

Authors

Stephanie Jost

R Keith Reeves

Affiliations

Soon will be listed here.

Abstract

Purpose Of Review: Like elephants (and T cells), accumulating evidence suggest natural killer (NK) cells never forget. The description of adaptive or memory NK cells, which can be induced by HIV/SIV infections and vaccines and associated with protective effects in persons with HIV (PWH), has dramatically increased the interest in leveraging NK cells to prevent HIV infection or suppress HIV reservoirs. However, harnessing their full antiviral potential has been hindered by an incomplete understanding of mechanisms underlying adaptive NK cell development and infected cell recognition. Herein, we outline the main discoveries around the adaptive functions of NK cells, with a focus on their involvement in HIV infection.

Recent Findings: NK cells with diverse adaptive capabilities, including antigen-specific memory, cytokine-induced and CMV-driven adaptive subsets, likely all play a role in HIV infection. Importantly, true antigen-specific memory NK cells have been identified that mediate recall responses against multiple infectious agents such as HIV, influenza, and SARS-CoV-2. The NKG2C receptor is pivotal for certain adaptive NK cell subsets, as it marks a population with enhanced antibody-dependent functions and has been described as the main receptor mediating antigen-specific responses via recognition of viral peptides presented by HLA-E.

Summary: Antiviral functions of adaptive/memory NK cells have tremendous, but as of yet, untapped potential to be harnessed for vaccine design, curative, or other therapeutic interventions against HIV.

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