Impact of Alpha-Melanocyte-Stimulating Hormone on Mitochondrial Function in Human Dermal Fibroblasts
November 2025
in “
Journal of Investigative Dermatology
”
TLDR Alpha-MSH affects mitochondrial function, and MC1R mutations may increase skin aging.
This study investigates the impact of alpha-Melanocyte-stimulating hormone (alpha-MSH) on mitochondrial function in human dermal fibroblasts, focusing on the role of melanocortin receptor 1 (MC1R). The research compares wild-type MC1R fibroblasts (MC1R-wt-HDFs) with loss-of-function MC1R fibroblasts (MC1R-LOF-HDFs). Results show that MC1R-LOF-HDFs have significantly lower oxidative phosphorylation (OXPHOS) coupling efficiency and mitochondrial respiration after alpha-MSH treatment compared to MC1R-wt-HDFs. The study highlights the potential link between alpha-MSH-MC1R signaling and mitochondrial function, suggesting that MC1R mutations may contribute to increased photoaging. Further research is being conducted to explore the modulation of mitochondrial function through cAMP signaling pathways.