MOTS-c is a mitochondrial-derived peptide (MDP) composed of 16 amino acids, which plays a critical role in cellular metabolic regulation. Synthesized within mitochondria, MOTS-c functions by modulating the cellular energy balance through pathways involved in glucose metabolism, insulin sensitivity, and cellular stress response.
Overview
MOTS-c is a short peptide encoded in the mitochondrial genome and a member of the larger group of mitochondrial-derived peptides (MDPs). MDPs have recently been found to be bioactive hormones that play important roles in mitochondrial communication and energy regulation. Originally thought to be related to the mitochondria only, new research has revealed that many MDPs are active in the cell nucleus and that some even make their way into the blood stream to have systemic effects. MOTS-c is a newly identified MDP that has, to date, been found to play important roles in metabolism, weight regulation, exercise capacity, longevity, and even processes leading to disease states like osteoporosis. MOTS-c has been found in the nucleus of cells as well as in the general circulation, making it a bonafide natural hormone. The peptide has been targeted for intensive research in the last five years due to its therapeutic potential.
Muscle Metabolism
Research in mice indicates the MOTS-c can reverse age-dependent insulin resistance in muscles, thereby improving muscle uptake of glucose. It does this by improving skeletal muscle response to AMPK activation, which in turn increases the expression of glucose transporters[1]. It is important to note that this activation is independent of the insulin pathway and thus offers an alternative means of boosting glucose uptake by muscles when insulin is ineffective or in insufficient quantity. The net result is improved muscle function, enhanced muscle growth, and decreased functional insulin resistance.
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