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Author Spotlight: Investigating mRNA Spatial Distribution in Drosophila Muscle Tissue
Published on: September 8, 2023
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Gene Expression Dynamics Underlying Muscle Aging in the Hawk Moth Manduca sexta
Avery Del Grosso1,2, Beate Wone1, Connor McMahon1,3
1Department of Biology, University of South Dakota, Vermillion, SD 57069, USA.
Genes
|November 27, 2025
Summary
Muscle aging involves complex molecular changes. The hawk moth Manduca sexta model reveals shifts toward increased protein breakdown and decreased energy production during aging.
Area of Science:
- Molecular Biology
- Gerontology
- Comparative Physiology
Background:
- Muscle aging impairs metabolism and physiological function.
- Molecular mechanisms of muscle aging are poorly understood.
- Traditional models are time- and resource-intensive.
Purpose of the Study:
- Investigate molecular mechanisms of muscle aging.
- Utilize the hawk moth Manduca sexta as a model organism.
- Perform time-course molecular dissection of muscle aging.
Main Methods:
- High-resolution temporal analysis of M. sexta muscle tissues.
- Analysis spanned middle age to advanced age.
- Examined gene expression changes during aging.
Main Results:
- Decreased expression of genes for fatty acid oxidation, ATP synthesis, and antioxidant defense.
- Increased expression of genes for proteolysis, catabolism, and insulin signaling.
- Observed changes in genes like akirin, titin, and choline transporters.
Conclusions:
- Aging muscles show a shift toward increased proteolysis and catabolism.
- M. sexta is a viable complementary model for muscle aging research.
- Further research needed to distinguish intrinsic aging from starvation effects in males.
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