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Mitochondrial Isolation from Skeletal Muscle
Published on: March 30, 2011
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Biochemical Isolation of Myonuclei from Mouse Skeletal Muscle Tissue
Alicia A Cutler1, Anita H Corbett1, Grace K Pavlath2
1Biology Department, Emory University, Atlanta, USA.
Bio-Protocol
|March 30, 2018
Summary
Researchers optimized a method to isolate skeletal muscle cell nuclei (myonuclei) for studying their function. This technique allows for detailed analysis of myonuclear changes, particularly in aging muscle.
Area of Science:
- Muscle Biology
- Cellular Biology
- Aging Research
Background:
- Skeletal muscle is vital for survival, with its cells containing thousands of nuclei (myonuclei) essential for function.
- Studying myonuclei is challenging due to difficulties in isolating them from muscle tissue.
- Myonuclei are critical for signaling integration and gene expression regulation.
Purpose of the Study:
- To develop and optimize a protocol for purifying myonuclei from skeletal muscle tissue.
- To enable downstream applications such as flow cytometry, mass spectrometry, and proteomics.
- To facilitate the study of myonuclear changes, including those associated with aging.
Main Methods:
- Optimized a protocol using ultracentrifugation over a discontinuous sucrose gradient to purify myonuclei.
- Separated the nuclear fraction from whole muscle tissue.
- Utilized purified nuclei for downstream analyses like flow cytometry and mass spectrometry.
Main Results:
- Successfully purified myonuclei from mouse hindlimb muscle tissue.
- Demonstrated the utility of the purified myonuclei for proteomic analysis.
- Compared the myonuclear proteome of young and old mouse hindlimb muscles.
Conclusions:
- The developed protocol provides an effective method for isolating myonuclei.
- This technique supports various downstream analyses, aiding skeletal muscle research.
- The method can be applied to investigate age-related changes in the myonuclear proteome.
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