Supplied strictly for in vitro laboratory research. Not for human consumption.

MOTS-c is a mitochondrial-derived peptide — part of a remarkable class of signalling molecules encoded not in the cell’s nucleus, but inside the mitochondria themselves. It has become a focus of metabolic research for its role in energy regulation and its frequently cited label as an “exercise mimetic.” This guide summarises what it is and what laboratory and animal studies have examined, for research context only.

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 12S rRNA gene. It is notable as one of the first peptides found to be encoded by mitochondrial DNA rather than nuclear DNA — revealing that mitochondria actively communicate with the rest of the cell through their own signalling molecules. It belongs to the mitochondrial-derived peptide (MDP) family, alongside humanin, and is measured in plasma and in tissues including muscle, brain, and liver. Its levels are reported to decline with age.

Discovery

MOTS-c was identified in 2015 by researchers led by Pinchas Cohen, in a study published in Cell Metabolism. By demonstrating that a short open reading frame within mitochondrial DNA encodes a functional metabolic peptide, the work established an entirely new class of mitochondrial signalling molecules and opened a field studying how mitochondria regulate whole-body physiology.

Mechanism studied in preclinical models

MOTS-c’s studied activity centres on cellular energy regulation, with skeletal muscle as its primary target tissue:

AMPK activation — its cellular actions inhibit the folate cycle and tethered de novo purine biosynthesis, leading to activation of AMPK, a master regulator of cellular energy.
Glucose handling in muscle — in models, it upregulates GLUT4 expression and enhances glucose uptake into skeletal muscle, improving insulin sensitivity.
Gene regulation — under metabolic stress it accumulates in the cytoplasm and nucleus, where it regulates genes involved in glucose metabolism and the stress response.
“Exercise mimetic” profile — by activating AMPK and enhancing glucose uptake, it mimics several metabolic effects of physical activity; circulating MOTS-c levels are reported to rise during exercise in humans.

What the preclinical research showed

In mouse studies, MOTS-c treatment prevented age-dependent and high-fat-diet-induced insulin resistance, as well as diet-induced obesity. Hyperinsulinemic-euglycemic clamp studies in mice reported improved whole-body insulin sensitivity, and the effects were concentrated in skeletal muscle — consistent with that tissue accounting for the majority of insulin-stimulated glucose disposal. These remain preclinical (animal) findings.

The state of the evidence

The bulk of MOTS-c research to date is preclinical, conducted in cell and mouse models. Human data is largely observational — for example, the finding that circulating levels change with exercise. MOTS-c is not an approved medicine in any jurisdiction and has not completed human efficacy trials. It is appropriately treated as a research compound only.

Research and sourcing considerations

As with any research peptide, reproducible results depend on verified identity and purity. Research-grade MOTS-c should be supplied with independent HPLC purity testing (≥99% purity) and a batch-specific certificate of analysis (COA) for the specific vial supplied.

DXB Peptides supplies research-grade MOTS-c for in vitro laboratory use — HPLC-tested to ≥99% purity with a batch-specific COA, cold-chain handled and delivered across the UAE.

Frequently asked questions

What is MOTS-c? A 16-amino-acid mitochondrial-derived peptide encoded in mitochondrial DNA, studied in preclinical metabolic research for AMPK activation and glucose metabolism.

Why is MOTS-c called an “exercise mimetic”? Because in research it activates AMPK and enhances muscle glucose uptake — pathways also engaged by physical exercise — and its circulating levels rise during exercise in humans.

Is MOTS-c approved? No. It is not approved for human use, and its research base is largely preclinical (cell and mouse models).

What purity should research-grade MOTS-c be? Look for independent HPLC testing at ≥99% purity, accompanied by a batch-specific certificate of analysis.

Important note

MOTS-c is supplied strictly for in vitro laboratory research. It is not a medicine, is not approved for human use in any jurisdiction, and is not for human consumption or in vivo administration.

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What Is MOTS-c? Mitochondrial-Derived Peptide Research Overview