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Analysis of myostatin gene structure, expression and function in zebrafish
Cheng Xu1, Gang Wu, Yonathan Zohar
1Center of Marine Biotechnology, University of Maryland Biotechnology Institute, Baltimore, MD 21202, USA.
The Journal of Experimental Biology
|October 14, 2003
Summary
Myostatin inhibits skeletal muscle growth in zebrafish. Overexpressing its prodomain increased myofiber number, demonstrating Myostatin
Area of Science:
- Molecular Biology
- Developmental Biology
- Genetics
Background:
- Myostatin, a TGF-beta family member, regulates skeletal muscle growth in mammals.
- The function of Myostatin in fish muscle development and growth is largely unknown.
Purpose of the Study:
- To isolate and characterize the zebrafish myostatin gene.
- To investigate the role of Myostatin in zebrafish skeletal muscle development and growth.
Main Methods:
- Zebrafish myostatin gene isolation and expression analysis.
- Transient expression analysis using GFP reporter.
- Generation of transgenic zebrafish overexpressing Myostatin prodomain.
Main Results:
- Myostatin gene is expressed in zebrafish embryos, larvae, and adult skeletal muscles.
- Zebrafish myostatin 5' flanking sequence directs muscle-specific expression.
- Overexpression of Myostatin prodomain led to increased myofiber number without affecting fiber size.
Conclusions:
- Myostatin acts as an inhibitor of skeletal muscle hyperplastic growth in zebrafish.
- The findings provide insights into the conserved role of Myostatin in vertebrate muscle development.