MOTS-c and Mitochondrial-to-Nuclear Signaling

Mitochondria can encode signaling peptides

MOTS-c is encoded within mitochondrial 12S rRNA, challenging the older view that mitochondrial DNA contributes only a narrow set of respiratory proteins and RNAs. It belongs to a growing class of mitochondrial-derived peptides.

Stress can change cellular localization

Preclinical work suggests MOTS-c can respond to metabolic stress and move to the nucleus, where it may influence gene expression. Reported pathways include AMPK, folate and purine metabolism, and adaptive stress responses.

Animal findings span multiple systems

Rodent studies have explored glucose metabolism, exercise capacity, insulin sensitivity, aging, and tissue stress. These findings are hypothesis generating and depend on species, model, sequence, and experimental exposure.

Human evidence is early

Observational studies have examined endogenous MOTS-c concentrations and genetic variants. Such associations do not establish the effects of administering synthetic MOTS-c. Controlled human pharmacology remains limited.

Safety and identity gaps remain

Human pharmacokinetics, immunogenicity, receptor targets, long-term effects, and off-target metabolic consequences are not established. FDA has identified safety-information gaps in the compounding context.

This article is provided for scientific and educational purposes. It does not describe or recommend human or veterinary use. Research findings may be limited by study design, model selection, material identity, sample size, or lack of independent replication.