Linking AIM2 Inflammasome Activation, Mitochondrial Dysfunction and Chronic Inflammation in Ankylosing Spondylitis

Area of Science:

• Immunology
• Molecular Biology
• Genetics

Background:

• The absent in melanoma 2 (AIM2) inflammasome is a cytosolic DNA sensor activated by double-stranded DNA (dsDNA).
• AIM2 links genomic instability, mitochondrial dysfunction, and chronic inflammation, particularly in autoimmune diseases like ankylosis spondylitis (AS).
• Current AS therapies do not target upstream mitochondrial dysfunction or DNA-driven inflammasome activation.

Purpose of the Study:

• To review evidence on AIM2 inflammasome involvement in AS pathogenesis.
• To explore AIM2 as a potential therapeutic target for AS.
• To understand AIM2's interaction with inflammation, mitophagy, and oxidative stress in AS.

Main Methods:

• Literature review of current evidence on AIM2 inflammasome in AS.
• Analysis of AIM2 activation mechanisms, including dsDNA and mitochondrial DNA (mtDNA) release.
• Examination of the interplay between AIM2, oxidative stress, mitophagy, and innate immunity.

Main Results:

• AIM2 is activated by dsDNA, including mtDNA released during stress, positioning it at the nexus of oxidative stress and immune dysregulation.
• AIM2 inflammasome activation is implicated in the pathogenesis of autoimmune diseases, including AS.
• AIM2 remains less studied compared to other inflammasomes like NLRP3.

Conclusions:

• AIM2 activation is a key factor in AS pathogenesis, driven by mitochondrial dysfunction and self-DNA.
• Targeting the AIM2 inflammasome presents a novel therapeutic avenue for AS.
• Restoring balance between mitochondrial function and autoimmunity through AIM2 modulation may improve disease control.