Persistent Type I Interferon Signaling Impairs Innate Lymphoid Cells During HIV-1 Infection Under Suppressive ART.

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State Key Laboratory of Virology and Biosafety, Department of Infectious Diseases, Medical Research Institute, Frontier Science Center for Immunology and Metabolism, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan 430071, China.

Published: August 2025


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Article Abstract

Persistent type I interferon (IFN-I) signaling compromises adaptive anti-HIV-1 T cell immunity and promotes viral reservoir persistence, yet its effects on innate lymphoid cells during chronic infection remain unclear. Through integrated single-cell RNA sequencing and functional validation in HIV-1-infected humanized mice with combination antiretroviral therapy (cART) and IFN-I signaling blockade, we reveal IFN-I-induced dysfunction of natural killer (NK) cells and group 3 innate lymphoid cells (ILC3s). Mechanistically, the IFN-I-CD9 axis drives NK cells toward a decidual NK cell-like phenotype, impairing their cytotoxic activity. Furthermore, IFNAR blockade rescues ILC3 functionality, which is critical for IL-17/IL-22-mediated antimicrobial defense and mucosal barrier maintenance. Our study delineates IFN-I-driven immunosuppression across innate lymphocyte compartments and proposes the targeted modulation of this pathway to enhance antiviral and mucosal immunity in HIV-1 management.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC12390710PMC
http://dx.doi.org/10.3390/v17081099DOI Listing

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