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Animal models of sarcopenia
Courtney J Christian1, Guy M Benian1
1Department of Pathology, Emory University, Atlanta, Georgia, USA.
Aging Cell
|August 29, 2020
Summary
Model organisms reveal key insights into sarcopenia, the age-related loss of muscle. Research using mice, flies, and worms identifies dietary restriction, exercise, and compounds that improve muscle mass and function in aging animals.
Area of Science:
- Gerontology
- Muscle Biology
- Molecular Biology
Background:
- Sarcopenia is the age-related decline in muscle mass and function, with unknown molecular mechanisms.
- Model organisms are crucial for understanding sarcopenia pathogenesis and identifying therapeutic targets.
Purpose of the Study:
- To review molecular and therapeutic discoveries in sarcopenia research using model organisms.
- To discuss the future utilization of these models for advancing sarcopenia understanding.
Main Methods:
- Review of studies utilizing model organisms (rodents, flies, worms, zebrafish) for sarcopenia research.
- Analysis of findings related to dietary restriction, exercise, compounds, and molecular pathways.
Main Results:
- Dietary restriction improves muscle performance in aged rodents, flies, and worms.
- Reduced insulin/IGF1 signaling alleviates sarcopenia in worms and flies.
- Mitochondrial dysfunction and 26S proteasome elevation are implicated in sarcopenia pathogenesis across models.
Conclusions:
- Model organisms provide valuable insights into sarcopenia, highlighting conserved mechanisms and potential interventions.
- Worm and fly models offer advantages for studying muscle maintenance due to the absence of muscle stem cells.
- Further research with model organisms, including zebrafish, is essential for developing therapies to enhance muscle health in aging individuals.
