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Related Concept Videos

Immunodeficiency Diseases01:25

Immunodeficiency Diseases

1.2K
Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
There are three main causes of immunodeficiency...
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Immune Response Against Viral Pathogens01:29

Immune Response Against Viral Pathogens

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The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
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Related Experiment Video

Updated: Sep 9, 2025

Assessing the Innate Sensing of HIV-1 Infected CD4+ T Cells by Plasmacytoid Dendritic Cells Using an Ex vivo Co-culture System.
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Persistent Type I Interferon Signaling Impairs Innate Lymphoid Cells During HIV-1 Infection Under Suppressive ART.

Runpeng Han1, Haisheng Yu2,3, Guangming Li2,4

  • 1State 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.

Viruses
|August 28, 2025
PubMed
Summary
This summary is machine-generated.

Persistent type I interferon (IFN-I) signaling impairs natural killer (NK) cells and group 3 innate lymphoid cells (ILC3s) in HIV-1 infection. Blocking IFN-I signaling restores immune function, crucial for managing HIV-1 and mucosal immunity.

Keywords:
human immunodeficiency virushumanized miceimmunopathogenesisinnate lymphoid cellstype-I interferon

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Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production
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Assessing the Innate Sensing of HIV-1 Infected CD4+ T Cells by Plasmacytoid Dendritic Cells Using an Ex vivo Co-culture System.
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Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production
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Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production

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Area of Science:

  • Immunology
  • Virology
  • Infectious Diseases

Background:

  • Persistent type I interferon (IFN-I) signaling is known to impair anti-HIV-1 T cell immunity and contribute to viral reservoir persistence.
  • The impact of chronic IFN-I signaling on innate lymphoid cells (ILCs) during HIV-1 infection is not well understood.

Purpose of the Study:

  • To investigate the effects of persistent IFN-I signaling on natural killer (NK) cells and group 3 innate lymphoid cells (ILC3s) in the context of chronic HIV-1 infection.
  • To explore the potential of blocking IFN-I signaling to restore innate lymphoid cell function and enhance antiviral and mucosal immunity.

Main Methods:

  • Integrated single-cell RNA sequencing was employed to analyze immune cell populations in HIV-1-infected humanized mice.
  • Functional validation was performed in conjunction with combination antiretroviral therapy (cART) and IFN-I signaling blockade.
  • The study examined the role of the IFN-I-CD9 axis in NK cell dysfunction.

Main Results:

  • IFN-I signaling induces dysfunction in both NK cells and ILC3s during chronic HIV-1 infection.
  • The IFN-I-CD9 axis promotes a decidual NK cell-like phenotype, leading to impaired cytotoxic activity.
  • IFNAR blockade effectively rescues ILC3 functionality, restoring IL-17/IL-22 production essential for antimicrobial defense and mucosal barrier integrity.

Conclusions:

  • Persistent IFN-I signaling drives immunosuppression across multiple innate lymphocyte compartments in HIV-1 infection.
  • Targeted modulation of the IFN-I pathway presents a promising strategy to enhance antiviral and mucosal immunity in HIV-1 management.
  • Restoring ILC3 function is critical for maintaining mucosal barrier integrity and defense against pathogens.