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Creatine: a possible stimulus skeletal cardiac muscle hypertrophy
Recent Advances in Studies on Cardiac Structure and Metabolism
|January 1, 1975
Summary
Creatine supplementation enhances myofibrillar protein synthesis in skeletal and cardiac muscle cells. This suggests creatine may play a role in muscle growth and hypertrophy.
Area of Science:
- Biochemistry
- Muscle Physiology
- Cell Biology
Background:
- Creatine is a molecule produced during muscle contraction.
- Understanding factors that regulate protein synthesis is crucial for muscle health.
Purpose of the Study:
- To investigate if creatine stimulates myofibrillar protein synthesis.
- To determine the effect of creatine on specific muscle proteins and overall protein synthesis.
Main Methods:
- In vitro experiments with skeletal muscle cells.
- In vivo studies involving cardiac muscle cells.
- Measurement of myofibrillar protein synthesis rates in the presence and absence of creatine.
Main Results:
- Creatine significantly increased the synthesis rates of myofibrillar proteins, including myosin heavy chain and actin.
- Creatine also stimulated the synthesis of creatine kinase.
- No significant changes were observed in total protein synthesis, DNA synthesis, or the activity of non-myofibrillar enzymes.
Conclusions:
- Creatine selectively promotes the synthesis of contractile proteins in muscle cells.
- The findings suggest a potential role for creatine in muscle hypertrophy.