MOTS-c Helps Reduce Inflammation Caused by Bacterial and Viral Infections

by Dr. James Ross

Disclaimer: All articles and product details provided on this website are intended for educational and informational purposes only. The products listed here are for in-vitro research only. In-vitro studies are conducted outside of living organisms. These products are not intended as medicines or drugs and have not been approved by the FDA to prevent, treat, or cure any medical condition, ailment, or disease. The direct or indirect administration of these substances to humans or animals is unequivocally prohibited under applicable law.

Introduction: Mitochondria, Immunosenescence, and Inflammaging

As we age, the immune system undergoes profound changes, a process known as immunosenescence. One hallmark of aging immunity is inflammaging—a chronic, low-grade inflammatory state linked to numerous age-related diseases.

Mitochondria play a central role in this process, not only by producing energy but also by regulating stress responses and inflammation. When mitochondria are stressed, they release signaling molecules called mitokines, which may act as anti-inflammatory mediators to counterbalance inflammaging.

The Anti-Inflammatory Role of Mitokines

Mitokines such as GDF15, FGF21, and Humanin (HN) have been identified as anti-inflammatory peptides in both human and animal studies. Their blood levels tend to rise with age, suggesting they are part of an adaptive response to chronic inflammation.

This mitokine-driven network may help maintain immune balance by reducing pro-inflammatory cytokines (IL-1β, IL-18, IL-6, TNF-α, etc.) and enhancing anti-inflammatory signaling. This process has been described as “anti-inflammaging”—a protective counterpart to inflammaging.

However, in individuals with severe age-related diseases, these protective responses often prove insufficient, leading to persistent inflammation and reduced life expectancy.

MOTS-c as an Anti-Inflammatory Mitokine

Among mitokines, MOTS-c stands out for its role in regulating both metabolism and immune function. MOTS-c is expressed in muscle and adipose tissue and circulates in the bloodstream. Research shows it can:

• Reduce pro-inflammatory cytokines (IL-6, IL-1β, TNF-α)
• Increase anti-inflammatory cytokine IL-10
• Suppress NF-κB and STAT1 pathways, which drive inflammation
• Enhance macrophage bactericidal activity, helping the immune system clear pathogens

Importantly, MOTS-c levels decline with age, suggesting reduced availability may contribute to the chronic inflammation seen in elderly individuals.

MOTS-c and Sepsis: Protecting Against Bacterial Infections

Sepsis represents one of the most extreme examples of uncontrolled inflammation. In experimental models of MRSA-induced sepsis, MOTS-c treatment:

• Improved survival rates
• Reduced bacterial loads
• Lowered inflammatory cytokines (TNF-α, IL-6, IL-1β)
• Increased IL-10 production
• Boosted macrophage pathogen-killing capacity

Mechanistically, MOTS-c suppressed MAPK activation while promoting AhR and STAT3 signaling, which together help blunt excessive inflammation and restore immune tolerance. These findings suggest MOTS-c may offer therapeutic potential for sepsis and other severe infections.

Viral Infections and Immune Tolerance

Evidence also suggests that MOTS-c and related mitokines (like GDF15) contribute to immune tolerance during viral infections. For instance, GDF15 can suppress overactive T-cell responses, reducing tissue damage while maintaining immune control. MOTS-c appears to complement this process by balancing inflammatory and anti-inflammatory cytokine activity.

This dual action—limiting harmful immune overactivation while preserving antimicrobial defense—highlights MOTS-c as a key player in protecting against both bacterial and viral inflammation-driven damage.

Mechanisms of Anti-Inflammatory Action

MOTS-c achieves its anti-inflammatory effects through multiple molecular pathways, including:

• AMPK activation → improves metabolic balance and stress resistance
• Suppression of MAPK signaling → reduces overproduction of inflammatory mediators
• STAT3 and AhR activation → promote immune regulation and anti-inflammatory cytokine expression
• Inhibition of NF-κB → limits the transcription of pro-inflammatory genes

Together, these mechanisms position MOTS-c as a bi-genomic regulator (involving both mitochondrial and nuclear genomes) that coordinates stress responses, metabolism, and immunity.

See More: mots c and cardiovascular  

REFERENCES

1. D’Souza RF, Woodhead JST, Hedges CP, Zeng N, Wan J, Kumagai H, Lee C, Cohen P, Cameron-Smith D, Mitchell CJ, Merry TL. Increased expression of the mitochondrial derived peptide, MOTS-c, in skeletal muscle of healthy aging men is associated with myofiber composition. Aging (Albany NY). 2020 Mar 17;12(6):5244-5258. doi: 10.18632/aging.102944. Epub 2020 Mar 17. PMID: 32182209; PMCID: PMC7138593.
2. Qin Q, Delrio S, Wan J, Jay Widmer R, Cohen P, Lerman LO, Lerman A. Downregulation of circulating MOTS-c levels in patients with coronary endothelial dysfunction. Int J Cardiol. 2018 Mar 1;254:23-27. doi: 10.1016/j.ijcard.2017.12.001. Epub 2017 Dec 6. PMID: 29242099.

Product available for research use only: