Abstract
This study investigated the effects of resveratrol feeding and exercise training on the skeletal muscle function and transcriptome of aged rats. Male SD rats (25 months old) were divided into the control group (Old), the daily exercise training group (Trained), and the resveratrol feeding group (Resveratrol). After 6 weeks of intervention, the body mass, grip strength, and gastrocnemius muscle mass were determined, and the muscle samples were analyzed by transcriptome sequencing. The differentially expressed genes were analyzed followed by GO enrichment analysis and KEGG analysis. The Old group showed positive increases in body mass, while both the Trained and Resveratrol groups showed negative growth. No significant differences in the gastrocnemius muscle index and absolute grip strength were found among the three groups. However, the relative grip strength was higher in the Trained group than in the Old group. Only 21 differentially expressed genes were identified in the Trained group vs. the Old group, and 12 differentially expressed genes were identified in the Resveratrol group vs. the Old group. The most enriched GO terms in the Trained group vs. the Old group were mainly associated with RNA metabolic processes and transmembrane transporters, and the significantly upregulated KEGG pathways included mucin-type O-glycan biosynthesis, drug metabolism, and pyrimidine metabolism. The most enriched GO terms in the Resveratrol group vs. the Old group were primarily associated with neurotransmitter transport and synaptic vesicle, and the upregulated KEGG pathways included synaptic vesicle cycle, nicotine addiction, retinol metabolism, insulin secretion, retrograde endocannabinoid signaling, and glutamatergic synapse. Neither exercise training nor resveratrol feeding has a notable effect on skeletal muscle function and related gene expression in aged rats. However, both exercise training and resveratrol feeding have strong effects on weight loss, which is beneficial for reducing the exercise loads of the elderly.
Highlights
Sarcopenia is characterized by a reduction in skeletal muscle mass and function during the aging processes (Ryall, Schertzer & Lynch, 2008; Rolland et al, 2008)
The relative grip strengths were significantly higher in both the Trained group and Resveratrol group than in the Old group (F = 5.019, P = 0.017) and were 2.04, 2.62, and 2.33 g g−1 for the Old, Trained, and Resveratrol rats, respectively (Fig. 2B)
The results present the global transcriptomic information involved in exercise and anti-oxidation interventions of skeletal muscle function in aged rats
Summary
Sarcopenia is characterized by a reduction in skeletal muscle mass and function during the aging processes (Ryall, Schertzer & Lynch, 2008; Rolland et al, 2008). The pathogenesis of sarcopenia has been proposed to be caused by factors such as oxidative stress, neuromuscular dysfunction, and inflammation The effects of resveratrol feeding and exercise training on the skeletal muscle function and transcriptome of aged rats. The mechanisms and intervention strategies of sarcopenia, have not been thoroughly elucidated to date (Russ et al, 2012; Kalinkovich & Livshits, 2015)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
