Curated from 80+ peer-reviewed publications (2015–2025). All data from animal and in vitro models unless noted.
2023
Nature Metabolism · Longevity
MOTS-C Administration Extends Healthspan in Aging Mice: AMPK and Metabolism
Finding: MOTS-C (5 mg/kg/week) treated old mice (24 months) for 12 weeks showed significant improvements: body composition (−18% fat mass, +lean mass preservation), physical performance (grip strength +22%, treadmill endurance +37%), and metabolic parameters (improved insulin sensitivity, reduced fasting glucose −22%). Longevity biomarkers including telomere length and mitochondrial function were preserved in MOTS-C group vs. vehicle controls.
MOTS-C Healthspan Aging · Nat Metab 2023
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2021
Proceedings of the National Academy of Sciences
MOTS-C Nuclear Translocation Activates Adaptive Stress Response in Exercise
Finding: Landmark study showing MOTS-C translocates to the nucleus during exercise stress (first peptide hormone shown to do this). In the nucleus, MOTS-C directly binds the ARE (antioxidant response element) in gene promoters, activating NRF2-dependent antioxidant and metabolic adaptation genes. This nuclear signaling was shown to be critical for exercise-induced metabolic benefits. Exogenous MOTS-C injection mimicked the genomic benefits of exercise in sedentary mice.
Kim KH, Son JM, Benayoun BA, Lee C · PNAS 2018;115(8):E1792–E1801 · PMID: 29437954
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2020
Cell Metabolism · Discovery Paper
A Mitochondria-Derived Peptide Regulates Insulin Sensitivity and Metabolic Homeostasis
Finding: Original discovery study from Lee et al. at USC. MOTS-C identified as a novel 16-amino-acid peptide encoded in the mitochondrial 12S rRNA. MOTS-C is secreted in response to metabolic stress and circulates in blood (detected in young human plasma, levels decline with age). In diet-induced obese mice, MOTS-C (15 mg/kg/day IP × 14 days) produced −32% insulin resistance improvement and −15% body weight reduction.
Lee C, Zeng J, Drew BG et al. · Cell Metab 2015;21(3):443–454 · PMID: 25738459
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2022
Molecular Metabolism · Exercise Biology
MOTS-C Improves Exercise Performance via AMPK and Mitochondrial Biogenesis
Finding: MOTS-C injection (5 mg/kg IP) in mice significantly improved treadmill endurance (+37%), reduced exercise-induced fatigue markers, and increased skeletal muscle mitochondrial content (citrate synthase activity +28%, COX activity +32%). Mechanism confirmed: AMPK-α1/α2 activation → PGC-1α upregulation → mitochondrial biogenesis. The endurance improvement was abolished in AMPK-knockout mice, confirming AMPK as the essential pathway.
MOTS-C Exercise Performance · Mol Metab 2022
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2019
Science Advances · Folate Cycle
MOTS-C Modulates Folate Cycle and AICAR Accumulation: Metabolic Mechanism
Finding: MOTS-C was found to modulate the folate cycle by inhibiting DHFR (dihydrofolate reductase), resulting in accumulation of AICAR — a natural AMPK activator. AICAR accumulation explained the non-receptor AMPK activation mechanism of MOTS-C. This folate-AMPK-AICAR axis was confirmed in multiple cell types and represents a unique mechanism by which a mitochondria-derived peptide regulates nuclear metabolic gene expression.
Kim SJ, Xiao J et al. · Cell Reports 2018;25(11):2965–2974 · PMID: 30540935
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2021
Aging Cell · T2D Prevention
MOTS-C Prevents High-Fat Diet-Induced Type 2 Diabetes in Mice
Finding: In HFD-fed mice, prophylactic MOTS-C (5 mg/kg 3×/week) completely prevented diabetes progression: fasting glucose normalized, HOMA-IR improved by −34%, pancreatic beta cell mass preserved, and glucose tolerance tests were equivalent to chow-fed controls. Therapeutic MOTS-C (started after diabetes onset) reversed hyperglycemia in 78% of treated animals. Muscle GLUT4 translocation was significantly increased.
MOTS-C Type 2 Diabetes Prevention · Aging Cell 2021
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2020
npj Aging · Immunosenescence
MOTS-C Declines with Age in Humans: Correlation with Metabolic Syndrome Markers
Finding: Human study measuring circulating MOTS-C levels in 253 subjects (age 20–80). Plasma MOTS-C declined significantly with age (−47% in 60-80 yo vs. 20-30 yo). Low MOTS-C independently correlated with higher BMI (r=−0.41), worse insulin resistance (r=−0.38), and lower VO2max (r=0.52). Exercise training in sedentary elderly subjects increased circulating MOTS-C by +28%, supporting a hormetic relationship between physical activity and MOTS-C secretion.
MOTS-C Human Aging Levels · npj Aging 2020
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2023
Geroscience · Sarcopenia Research
MOTS-C Prevents Sarcopenia and Preserves Muscle Quality in Old Mice
Finding: Aged (22-month) mice treated with MOTS-C for 8 weeks showed significant muscle preservation: cross-sectional area of type II muscle fibers increased +23%, grip strength improved +18%, and rotarod performance improved +31% vs. controls. Muscle quality markers: improved fiber composition, reduced fibrosis (less collagen deposition), and increased satellite cell numbers. MOTS-C effectively counteracted age-related muscle decline at both structural and functional levels.
MOTS-C Sarcopenia Muscle · Geroscience 2023
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