What Is MOTS-C?
MOTS-C (mitochondrial open reading frame of the 12S rRNA-c) is a 16-amino acid peptide encoded within the mitochondrial genome — specifically the 12S ribosomal RNA gene. Discovered in 2015 by Lee et al. at the University of Southern California, it represents a new class of mitochondria-derived peptides (MDPs) with systemic signalling functions.
Unlike most peptides encoded in nuclear DNA, MOTS-C originates from the mitochondrial genome, placing it at the intersection of mitochondrial biology and systemic metabolic regulation. Circulating levels of MOTS-C decline with age, drawing interest from longevity researchers.
How It Works
MOTS-C translocates from mitochondria to the nucleus in response to metabolic stress, where it regulates gene expression related to glucose utilisation, fatty acid oxidation, and antioxidant defence. It activates AMPK (AMP-activated protein kinase) — a master regulator of cellular energy homeostasis — and modulates the folate-methionine cycle to influence metabolic flexibility.
Key Research Findings
Insulin Sensitivity
Animal studies demonstrate MOTS-C administration improves insulin sensitivity and glucose uptake in skeletal muscle via AMPK activation and GLUT4 translocation — pathways relevant to type 2 diabetes and metabolic syndrome research.
Exercise Performance
Research in aged mice showed MOTS-C administration enhanced physical capacity and muscle strength, partly by mimicking transcriptional adaptations associated with aerobic exercise training. This has drawn interest in the context of age-related sarcopenia.
Longevity Correlation
Epidemiological analysis has identified MOTS-C genetic variants associated with longevity in Japanese centenarian cohorts, suggesting the peptide plays a functional role in healthy ageing beyond its acute metabolic effects.
Anti-Inflammatory Effects
MOTS-C suppresses pro-inflammatory cytokines including TNF-α and IL-6 in macrophage models, and has shown protective effects in sepsis models — positioning it as a subject of interest in mitochondrial immunology research.
Research-Grade MOTS-C
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For research purposes only. This page does not constitute medical advice. Consult a qualified healthcare professional before use. Clinician review required where mandated by law.