# Exploring the Role of MOTS-c in Polycystic Ovary Syndrome and Mitochondrial Dysfunction

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Mitochondrial & Longevity · 2026-02-12


    Women with polycystic ovary syndrome (PCOS) exhibit reduced levels of the mitochondrial-derived peptide MOTS-c, indicating potential mitochondrial dysfunction. This reduction in MOTS-c may have implications for understanding the metabolic and hormonal dysregulation associated with PCOS. The study highlights the importance of investigating mitochondrial-derived peptides in the context of metabolic disorders.

 What this study examined

This research focused on assessing the levels of circulating and skeletal muscle MOTS-c in women diagnosed with polycystic ovary syndrome (PCOS) compared to age- and BMI-matched healthy controls. The study involved 40 women with PCOS and 40 controls who underwent clinical, biochemical, and hormonal phenotyping. Serum MOTS-c concentrations were quantified using enzyme-linked immunosorbent assay (ELISA), while skeletal muscle MOTS-c expression was evaluated through Western blotting in biopsy specimens from the vastus lateralis muscle.

 Why it matters for MOTS-c research

The findings from this study are significant as they suggest that reduced levels of MOTS-c in women with PCOS may be indicative of mitochondrial dysfunction, which is often linked to insulin resistance and metabolic issues. By establishing a connection between MOTS-c levels and metabolic parameters, this research opens avenues for further exploration of mitochondrial-derived peptides in metabolic disorders. Understanding the role of MOTS-c could lead to new insights into the endocrine and metabolic phenotype of PCOS, potentially guiding future therapeutic strategies.

 Key findings

Women with PCOS had significantly lower circulating MOTS-c concentrations compared to healthy controls (220.2 ± 147.6 pg/mL vs. 498.3 ± 224.4 pg/mL, p < 0.001).

Skeletal muscle MOTS-c expression was also reduced in the PCOS group (74.2 ± 15.2 vs. 100.0 ± 8.5 arbitrary units; p = 0.005).

Serum MOTS-c levels were inversely associated with total testosterone levels (r = -0.224, p = 0.046).

There was an inverse association between serum MOTS-c levels and total cholesterol (r = -0.228, p = 0.044).

The study suggests that lower MOTS-c levels may be linked to hyperandrogenism and altered lipid profiles in women with PCOS.

These findings indicate that MOTS-c could serve as a potential marker for mitochondrial involvement in PCOS.

 How MOTS-c works (background)

MOTS-c is a mitochondrial-derived peptide that plays a crucial role in regulating glucose homeostasis and skeletal muscle metabolism. It is known to influence metabolic pathways by promoting insulin sensitivity and enhancing mitochondrial function. The peptide is believed to exert its effects by modulating cellular signaling pathways related to energy metabolism, which are often disrupted in metabolic disorders like PCOS. Previous research has indicated that mitochondrial dysfunction can lead to a range of metabolic complications, making the study of peptides like MOTS-c essential for understanding these processes.

 Practical takeaways for researchers

Researchers investigating the implications of mitochondrial dysfunction in metabolic disorders should consider the role of MOTS-c as a biomarker for mitochondrial health. The associations found between MOTS-c levels and hormonal and metabolic parameters in women with PCOS may provide insights into the pathophysiology of the syndrome. Future studies could explore the therapeutic potential of targeting MOTS-c pathways to improve metabolic outcomes in PCOS and similar conditions. For those interested in peptide research, understanding the mechanisms of MOTS-c may enhance the development of effective interventions.

 FAQ

 What is MOTS-c?

MOTS-c is a mitochondrial-derived peptide that is involved in regulating metabolism and glucose homeostasis.

 How is MOTS-c related to PCOS?

Reduced levels of MOTS-c have been associated with metabolic dysfunction in women with polycystic ovary syndrome.

 Why is MOTS-c important for metabolic research?

MOTS-c may serve as a potential biomarker for mitochondrial involvement in metabolic disorders, providing insights into their pathophysiology.

 Source: PubMed · Sci Rep · published 2026-02-12.

## Sources

- PubMed · Sci Rep: https://pubmed.ncbi.nlm.nih.gov/41680431/