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Mtc2.5
MOTS-c Research
Mostly mechanism / observational
14 peer-reviewed studies
What the evidence says
Mostly mechanism / observational
Most MOTS-c studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.
Most evidence is from mixed-quality meta-analyses and randomised trials published 2015–2025 with a typical study size of 10 participants.
Based on 14 studies · 1 meta-analysis · 1 RCT · 10 total participants
Confidence
Moderate confidence
By outcome
Longevity & agingA mitochondrial-derived peptide with exercise-mimetic and metabolic effects in animals plus observational human associations; no interventional human evidence. · Not established (no interventional human data)
Mostly mechanism / observational10 studies
Glucose & metabolicImproved insulin sensitivity/glucose metabolism in animals only; human data are observational, not interventional. · Not established (no interventional human data)
Mostly mechanism / observational4 studies
Exercise & physical performance
Mostly mechanism / observational3 studies
Active research area
6 studies in the last 5 years · Latest meta-analysis: 2024
201520202025
1RCTn=10 · very small study2025
In plain English: Further research is needed to elucidate the underlying mechanisms and explore the therapeutic potential of heat stress and mitokines in mitigating muscle loss.
Elhusseiny R, Ihsan M, Labidi M, Alhammoud M, Mtibaa K, Nader N, Nasir N, Farooq A, Papakostas E, Olory B, Cruz F, D'Hooghe P, Racinais S, Deldicque L. · Medicine and science in sports and exercise (2025)
Results Although immobilization did not induce any effect on mitokine levels, repeated heat treatment upregulated the circulating MOTS-c ( P = 0.033) and downregulated the skeletal muscle FGF21 ( P = 0.027) levels.
Immobilization decreased muscle thickness ( P = 0.012, η2 = 0.32) and cross-sectional area ( P < 0.01, η2 = 0.75) of the gastrocnemius medialis.
Conclusions Our results indicate that repeated heat stress specifically modulates the levels of the mitokines MOTS-c and FGF21 in a manner that is comparable to, but not identical to, exercise.
In plain English: Its primary target organ appears to be the skeletal muscle, and its cellular actions inhibit the folate cycle and its tethered de novo purine biosynthesis, leading to AMPK activation.
Lee C, Zeng J, Drew BG, Sallam T, Martin-Montalvo A, Wan J. · Cell Metab (2015)
Discovery paper: identifies MOTS-c, a 16-amino-acid peptide encoded within the mitochondrial 12S rRNA, that regulates insulin sensitivity and metabolic homeostasis
Cellular action is inhibition of the folate cycle and de novo purine biosynthesis, leading to AMPK activation, with skeletal muscle as the primary target
MOTS-c treatment in mice prevented age-dependent and high-fat-diet-induced insulin resistance and diet-induced obesity
In plain English: Mitochondrial-encoded MOTS-c can significantly enhance physical performance in young (2 mo.), middle-age (12 mo.), and old (22 mo.) mice... In humans, exercise induces endogenous MOTS-c expression in skeletal muscle and in circulation.
Reynolds JC, Lai RW, Woodhead JST, Joly JH, Mitchell CJ, Cameron-Smith D. · Nat Commun (2021)
In mice, MOTS-c treatment enhanced physical performance across young, middle-aged and old animals, and late-life intermittent dosing (3×/week) increased physical capacity and healthspan
MOTS-c regulated nuclear genes related to metabolism and proteostasis and modulated skeletal-muscle metabolism and myoblast stress adaptation
Human component is observational: exercise induced endogenous MOTS-c in skeletal muscle and circulation — not an interventional trial of administered MOTS-c
In plain English: MOTS-c... translocates to the nucleus and regulates nuclear gene expression following metabolic stress in a 5'-adenosine monophosphate-activated protein kinase (AMPK)-dependent manner.
Kim KH, Son JM, Benayoun BA, Lee C. · Cell Metab (2018)
Mechanistic cell study showing MOTS-c translocates to the nucleus and regulates nuclear gene expression in an AMPK-dependent manner under metabolic stress
Under glucose restriction, MOTS-c regulated genes with antioxidant response elements (ARE) and interacted with the stress transcription factor NRF2 (NFE2L2)
Frames a bi-genomic 'mitonuclear' communication mechanism — a mitochondrial-encoded factor controlling the nuclear genome
In plain English: MOTS-c may act as an inhibitor of VC by activating the AMPK signaling pathway and suppressing the expression of the AT-1 and ET-B receptors.
Wei M, Gan L, Liu Z, Liu L, Chang JR, Yin DC. · Cardiorenal Med (2020)
Rat vitamin-D3/nicotine vascular-calcification model; MOTS-c injected at 5 mg/kg/day for 4 weeks
MOTS-c significantly attenuated vascular calcification and secondary myocardial remodeling on echocardiography and histology
Mechanistically raised phosphorylated AMPK and lowered angiotensin-II type-1 (AT-1) and endothelin-B (ET-B) receptor expression
In plain English: MOTS-c treatment significantly alleviated bone loss... MOTS-c increased phosphorylated AMPK levels, and compound C, an AMPK inhibitor, could partially abrogate the effects of the MOTS-c on osteoclastogenesis.
Ming W, Lu G, Xin S, Huanyu L, Yinghao J, Xiaoying L. · Biochem Biophys Res Commun (2016)
Mouse ovariectomy osteoporosis model; MOTS-c injected at 5 mg/kg/day for 12 weeks
MOTS-c significantly reduced bone loss on micro-CT and inhibited RANKL-induced osteoclast differentiation
Effect depended on AMPK: MOTS-c raised phosphorylated AMPK and the AMPK inhibitor compound C partially abrogated the benefit
In plain English: Circulating MOTS-c reduced with age, but older (70-81 y) and middle-aged (45-55 y) men had ~1.5-fold higher skeletal muscle MOTS-c expression than young (18-30 y).
D'Souza RF, Woodhead JST, Hedges CP, Zeng N, Wan J, Kumagai H. · Aging (Albany NY) (2020)
Human observational study of plasma and skeletal-muscle MOTS-c across young, middle-aged and older healthy men
Circulating MOTS-c declined with age, while muscle MOTS-c expression was higher in older/middle-aged men and tracked slow-type myofiber markers
In older men, muscle MOTS-c was associated with better muscle quality (leg-press load relative to thigh cross-sectional area)
In plain English: MOTS-c has been used less frequently in disease treatment, and no effective method of applying MOTS-c in the clinic has been developed.
Zheng Y, Wei Z, Wang T. · Front Endocrinol (Lausanne) (2023)
Review of MOTS-c biology and its proposed roles in aging, cardiovascular disease, insulin resistance and inflammation
Describes nuclear translocation under metabolic stress, improved skeletal-muscle glucose metabolism, and an age-related decline in plasma levels
Explicitly states no effective clinical application of MOTS-c has been developed — underscoring the lack of human therapeutic evidence
In plain English: Among MDPs, mitochondrial ORF of the 12S rRNA type-c (MOTS-c) is the most associated with exercise... Systemic MOTS-c administration increases exercise performance by boosting skeletal muscle stress responses.
Yoon TK, Lee CH, Kwon O, Kim MS. · Diabetes Metab J (2022)
Review of MOTS-c within exercise-related mitohormesis (the beneficial response to low-level mitochondrial stress)
Summarizes that MOTS-c rises in skeletal muscle, circulation and hypothalamus with exercise, and that exogenous MOTS-c boosts performance and adipose thermogenesis in animal studies
Frames MOTS-c as a mediator of some salutary metabolic effects of exercise
In plain English: Increased β-amyloid or low MOTS-c are additive predictors to high on-clopidogrel platelet reactivity for adverse outcome in diabetics with CAD during 2-years follow-up.
Ikonomidis I, Katogiannis K, Kyriakou E, Taichert M, Katsimaglis G, Tsoumani M. · J Thromb Thrombolysis (2020)
Prospective observational cohort of 121 type 2 diabetics after coronary revascularization (plus a 90-patient external validation cohort); MOTS-c measured by blood assay
Low MOTS-c (< 167 ng/ml) independently predicted major adverse cardiac events over 2 years (relative risk 3.8), additive to high on-clopidogrel platelet reactivity
An association/prognostic-marker study of endogenous circulating MOTS-c, not an interventional trial of administered MOTS-c
In plain English: This is the first study to show increased lipid enhanced circulating MOTS-c whilst insulin attenuated the MOTS-c response in human... eight weeks of moderate exercise training did not show any changes in circulating MOTS-c levels.
Ramanjaneya M, Jerobin J, Bettahi I, Bensila M, Aye M, Siveen KS. · Clin Endocrinol (Oxf) (2019)
Human observational/physiology study in PCOS and healthy subjects using intralipid infusion + hyperinsulinaemic-euglycaemic clamp, with plasma MOTS-c measured by ELISA
Intralipid significantly raised plasma MOTS-c (to ~232% basal in controls, ~349% in PCOS); insulin infusion blunted the lipid-induced rise
Notably, eight weeks of moderate exercise training did NOT change circulating MOTS-c in either group — a null human finding
In plain English: We suggest that the m.1382A>C polymorphism located in the MOTS-c encoding mtDNA, which is specific for the Northeast Asian population, may be among the putative biological mechanisms explaining the high longevity of Japanese people.
Fuku N, Pareja-Galeano H, Zempo H, Alis R, Arai Y, Lucia A. · Aging Cell (2015)
Hypothesis/perspective linking a MOTS-c-encoding mtDNA polymorphism (m.1382A>C) to exceptional longevity in Northeast Asian populations
Frames circulating MOTS-c decline and genetic variation as putative aging mechanisms — explicitly noting more research is needed
An association/hypothesis paper, not interventional evidence