Self-DNA Sensing Fuels HIV-1-Associated Inflammation

Area of Science:

• Immunology
• Virology
• Molecular Biology

Background:

• HIV-1 infection is characterized by inflammation, overactive innate immunity, and CD4+ T cell depletion.
• Self-DNA is a known contributor to inflammation in various diseases but its role in HIV-1 is understudied.

Purpose of the Study:

• To investigate the potential role of self-DNA in driving HIV-1-associated inflammation.
• To explore self-DNA as a target for novel HIV-1 therapeutic strategies.

Main Methods:

• Analysis of cellular damage and self-DNA release during HIV-1 infection.
• Investigation of self-DNA complex formation with DAMPs and extracellular vesicles.
• Assessment of self-DNA accessibility to intracellular DNA sensors.

Main Results:

• HIV-1-associated pyroptotic bystander cell death releases self-DNA and DAMPs.
• Complexes of self-DNA with DAMPs or extracellular vesicles enhance immunogenicity.
• Self-DNA gains accessibility to intracellular DNA sensors.

Conclusions:

• Self-DNA is hypothesized to contribute significantly to HIV-1-associated inflammation.
• Self-DNA may exacerbate HIV-1-associated 'inflamm-ageing'.
• Targeting self-DNA presents a potential avenue for 'shock and kill' strategies against latent HIV-1.