Fight Muscle Loss: The Cellular Science of Sarcopenia
Key Takeaways Sarcopenia, the age-related loss of muscle mass, is driven by an imbalance between muscle protein synthesis (anabolism) and breakdown (catabolism). Key molecular pathways like mTORC1 (for muscle growth) and UPS/autophagy (for muscle breakdown) become dysregulated with aging or inactivity. Inflammation, oxidative stress, and hormonal changes (e.g., low IGF-1) exacerbate muscle atrophy by activating…
