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Dietary creatine monohydrate supplementation increases satellite cell mitotic activity during compensatory
B Dangott1, E Schultz, P E Mozdziak
1Department of Anatomy, University of Wisconsin-Medical School, Madison, USA.
International Journal of Sports Medicine
|February 22, 2000
Summary
Creatine supplementation enhances satellite cell activity during muscle growth under increased functional load. This study found creatine boosts mitotic activity in muscle cells when combined with compensatory hypertrophy in rats.
Area of Science:
- Exercise Physiology
- Muscle Biology
- Nutritional Science
Background:
- Nutritional status impacts muscle growth and athletic performance.
- The effect of creatine supplementation on satellite cell activity is not well understood.
Purpose of the Study:
- To investigate the impact of oral creatine supplementation on muscle growth.
- To examine creatine's effect on compensatory hypertrophy and satellite cell mitotic activity.
Main Methods:
- Induced compensatory hypertrophy in rat plantaris muscles by surgical removal of adjacent muscles.
- Administered creatine monohydrate to a supplemented group and compared it to a control group.
- Utilized 5-bromo-2'-deoxyuridine (BrdU) to label and quantify mitotically active satellite cells.
Main Results:
- Compensatory hypertrophy increased muscle mass and myofiber diameter compared to controls.
- Creatine supplementation did not affect muscle mass or diameter independently.
- Creatine supplementation significantly increased satellite cell mitotic activity when combined with compensatory hypertrophy.
Conclusions:
- Creatine supplementation, when combined with increased functional load, augments satellite cell proliferation.
- These findings suggest a synergistic effect of creatine and exercise on muscle adaptation at the cellular level.
Keywords:
Non-programmatic