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• W1586016472 abstract "Abstract Aim: Both muscle mass and strength decline with ageing, but the loss of strength far surpasses what is projected based on the decline in mass. Interestingly, the accumulation of fat mass has been shown to be a strong predictor of functional loss and disability. Furthermore, there is a known attenuated hypertrophic response to skeletal muscle overload with ageing. The purpose of this study was to determine the effect of 28 days of overload on the storage of intramuscular triglycerides (IMTG) and metabolic regulators of lipid synthesis in young and old skeletal muscle. Methods: The phosphorylation and expression of essential lipogenic regulators were determined in the plantaris of young (YNG; 6‐month‐old) and aged (OLD; 30‐month‐old) rats subjected to bilateral synergist ablation (SA) of two‐thirds of the gastrocnemius muscle or sham surgery. Results: We demonstrate that age‐induced increases in IMTG are associated with enhancements in the expression of lipogenic regulators in muscle. We also show that the phosphorylation and concentration of the 5′AMP‐activated protein kinase (AMPK) isoforms are altered in OLD. We observed increases in the expression of lipogenic regulators and AMPK signalling after SA in YNG, despite no increase in IMTG. Markers of oxidative capacity were increased in YNG after SA. These overload‐induced effects were blunted in OLD. Conclusion: These data suggest that lipid metabolism may be altered in ageing skeletal muscle and is unaffected by mechanical overload via SA. By determining the role of increased lipid storage on skeletal muscle mass during ageing, possible gene targets for the treatment of sarcopenia may be identified." @default.
• W1586016472 created "2016-06-24" @default.
• W1586016472 creator A5063933818 @default.
• W1586016472 creator A5076673709 @default.
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• W1586016472 date "2011-04-22" @default.
• W1586016472 modified "2023-10-17" @default.
• W1586016472 title "Lipogenic regulators are elevated with age and chronic overload in rat skeletal muscle" @default.
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• W1586016472 doi "https://doi.org/10.1111/j.1748-1716.2011.02289.x" @default.
• W1586016472 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3995003" @default.
• W1586016472 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21439027" @default.
• W1586016472 hasPublicationYear "2011" @default.
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