MOTS-c 10mg Cellular senescence

Mitochondria possess their own genome (mtDNA, approximately 16,569 base pairs in humans) encoding 13 respiratory chain proteins, 2 ribosomal RNAs and 22 transfer RNAs. The discovery that this DNA also contained sequences coding for small secreted bioactive peptides (called mitokines) opened an entirely new field of research. MOTS-c is encoded in the MT-RNR1 gene (12S rRNA) via an alternative reading frame, joining Humanin (identified in 2001) as major mitochondrial-encoded peptide.

Atlas Lab formulates MOTS-c 10mg as high-purity lyophilizate (>98% HPLC) for research applications exclusively. Strict RUO — not intended for human, veterinary, diagnostic or therapeutic use. Circulating levels of endogenous MOTS-c progressively decline with age, an observation that initially positioned the molecule as a tool for studying metabolic aging and sarcopenia.

Chronic schemes reported alternate active periods of 8-12 weeks with 2-4 week pauses to allow adaptive transcriptional response without saturation of AMPK pathways and without potential cellular desensitization. The administration window is generally morning due to the synergy observed with the circadian rhythm of the AMPK pathway, itself more active in the morning during post-overnight fasting period.

Combination with other mitochondrial or metabolic peptides is theoretically relevant. MOTS-c plus SS-31 covers two distinct mitochondrial aspects (retrograde signaling for MOTS-c, membrane integrity for SS-31). MOTS-c plus Humanin combines two peptide mitokines with complementary systemic actions (metabolic for MOTS-c, anti-apoptotic for Humanin). These combinations remain experimental without formal clinical validation.

Before reconstitution, the lyophilized vial of MOTS-c 10mg must be stored between 2 and 8 degrees Celsius, in its original packaging, away from direct light and any heat source. Under these conditions, the lyophilizate stability is ensured for 24 to 36 months from the manufacturing date. The stability of lyophilized MOTS-c is comparable to that of medium-sized linear peptides, without the presence of residues particularly sensitive to oxidation or photolysis.

Prolonged storage at ambient temperature (>25 degrees Celsius) must remain exceptional and not exceed 72 hours; beyond that, a risk of degradation and potency loss exists. Excessive heat (>40 degrees Celsius) causes accelerated hydrolysis of peptide bonds and irreversibly compromises the molecule's biological activity.

After reconstitution with sterile bacteriostatic water, the aqueous MOTS-c solution remains stable for approximately 30 days at 2-8 degrees Celsius. This duration is in the standard range of research peptides comparable to Ipamorelin, GHRP-6 and Hexarelin. Freezing at -20 degrees Celsius or less extends stability up to 4-6 months under optimal conditions. However, each freeze-thaw cycle partially degrades the molecule and must be avoided.

Light protection is recommended but not critical for MOTS-c, sequence less photosensitive than peptides containing multiple tryptophan residues. The original opaque packaging or storage in a closed refrigerator drawer suffices in most configurations. Protection against intense mechanical agitation remains essential: never shake the vial violently during reconstitution. Gentle rotation between palms for 2-3 minutes suffices for complete lyophilizate dissolution.

Any solution presenting a color change (normally colorless and clear), a precipitate, or particles in suspension must be immediately discarded. Visual inspection before each sampling is a mandatory practice in research context. Atlas Lab provides detailed recommendations for rigorous experimental traceability. Traceability is particularly important for MOTS-c due to its relative novelty (discovered in 2015) and the sensitivity of metabolic study models to residual molecular contaminations that could interfere with the studied AMPK or mTOR pathways.

The mechanism of action of MOTS-c rests on a distinctive retrograde mitochondrion-to-nucleus hormetic signaling. Unlike classical peptides that act via cell surface receptors, MOTS-c exerts its biological effects primarily via activation of the AMPK pathway (AMP-activated protein kinase), the cellular conductor of energy homeostasis.

Nuclear translocation of MOTS-c after metabolic stress represents a second distinct mechanism. Kim 2018 (Cell Reports) showed that under conditions of glucidic restriction or metabolic stress, MOTS-c migrated from cytosol to cell nucleus, where it directly modulated transcription of genes regulating stress response, autophagy and fatty acid metabolism. This stress-modulated transcription factor function represents an unprecedented mechanism for a small peptide.

The decline of circulating MOTS-c levels with human age was documented by Lee 2015 and correlated with metabolic aging parameters (HOMA-IR, abdominal circumference, HbA1c). The K14Q polymorphism in the MOTS-c sequence, studied by Fuku 2015 (Aging Cell) in Japanese centenarian cohorts, was associated with increased prevalence of exceptional longevity, suggesting a functional role of this peptide in the human aging trajectory. These observations stimulated research on MOTS-c as potential modulator of metabolic longevity.

The scientific corpus of MOTS-c is relatively young (discovered in 2015) but has rapidly expanded with publications in major journals covering metabolism, aging, exercise and longevity. The founding discovery of Lee and collaborators published in 2015 in Cell Metabolism established the existence of the peptide, its mitochondrial origin, its sequence of 16 amino acids, and its major effects on glucose homeostasis in mice and human subjects. This publication generated more than 1000 citations in less than eight years.

Fuku and collaborators published in 2015 in Aging Cell an important genomic study on 696 Japanese centenarians and 775 young controls, identifying the K14Q polymorphism in the MOTS-c sequence (replacement of a lysine by a glutamine at position 14) with significantly increased prevalence in male Japanese centenarians. This observation positioned MOTS-c as potential modulator of exceptional longevity, even if the precise mechanistic link remains to be deepened.

Lu 2019 (Aging) extended observations to accelerated aging models and documented the effects of MOTS-c on average longevity in mice, with a lifespan extension of 8-12% in certain specific genetic cohorts. Kim 2018 (Cell Reports) characterized the nuclear translocation of MOTS-c under metabolic stress and identified its transcriptional targets, clarifying the direct gene regulation mechanism.