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Mitochondrial RNA in Inflammation
Jian Chen1,2, Chen You2, Haibo Xie1,3,4
1Department of Dermatology, the First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China.
International Journal of Biological Sciences
|September 17, 2025
Summary
Mitochondrial RNA (mtRNA) triggers innate immune responses, driving inflammation and linked to various diseases. Targeting mtRNA offers new therapeutic avenues for inflammatory and autoimmune conditions.
Area of Science:
- Cell Biology
- Immunology
- Molecular Biology
Background:
- Mitochondria are crucial for cellular energy and homeostasis.
- Emerging evidence highlights mitochondria's role in regulating innate immunity.
- Mitochondrial RNA (mtRNA) is a newly identified factor in inflammatory responses.
Purpose of the Study:
- To review the role of mtRNA in innate immune signaling.
- To explore the mechanisms of mtRNA-mediated inflammation.
- To propose novel therapeutic strategies targeting mtRNA.
Main Methods:
- Literature review of studies on mtRNA and innate immunity.
- Analysis of signaling pathways involving pattern recognition receptors (PRRs), MAVS, IRF3, NF-κB, and inflammasomes.
- Investigation of exosome-mediated intercellular transfer of mtRNA.
Main Results:
- mtRNA activates PRRs, leading to MAVS, IRF3/NF-κB, and inflammasome activation.
- This results in the production of type I interferons and pro-inflammatory cytokines.
- Aberrant accumulation of mitochondrial double-stranded RNA (mt-dsRNA) is associated with autoimmune and degenerative diseases, cancers, and cardiovascular/respiratory ailments.
Conclusions:
- mtRNA is a key mediator of inflammatory signaling.
- mt-dsRNA accumulation is implicated in numerous pathologies.
- Targeting mtRNA degradation or inflammatory pathways presents promising therapeutic opportunities.
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