Recovery of SIRT3-SOD2 Axis and Mitophagy by Short-Term Calorie Restriction in Old Rat Soleus Skeletal Muscle.

ABSTRACT: Age-related mitochondrial dysfunction is involved in the progressive loss of mass and strength of skeletal muscle with aging. The effects of a short-term calorie restriction (ST-CR) were assessed in the oxidative skeletal soleus muscle (Sol) from 27-month-old rats and compared with those of a CR in combination with resveratrol (RSV) (ST-CR + RSV). PGC-1α and PRXIII proteins showed a marked decrease in both ST-CR and ST-CR + RSV rats. The SIRT3 protein presented a very relevant increase in both ST groups. ST-CR and ST-CR + RSV elicited a marked increase in SOD2 protein amount and activity. ST-CR and ST-CR + RSV led to recovery of the SIRT3-SOD2 axis as a fast/early response. ST-CR and ST-CR + RSV did not affect the MFN2 protein, whereas both treatments induced a relevant increase in DRP1 pr

SUBMITTER: Di Lorenzo R 

PROVIDER: S-EPMC12466821 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature