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Switching of Sox9 expression during musculoskeletal system development
Ryotaro Nagakura1, Masahito Yamamoto1, Juhee Jeong2
1Department of Anatomy, Tokyo Dental College, 2-9-18 Misaki-cho, Chiyoda-ku, Tokyo, 101-0061, Japan.
Scientific Reports
|May 23, 2020
Summary
SRY-box containing gene 9 (Sox9) is crucial for musculoskeletal development. Its expression in muscle, tendon, and bone progenitors is essential for forming a functional musculoskeletal system.
Area of Science:
- Developmental biology
- Molecular biology
- Genetics
Background:
- The musculoskeletal system integrates muscles, tendons, and bones for movement and stability.
- The precise developmental mechanisms governing this complex system remain incompletely understood.
- SRY-box containing gene 9 (Sox9) is a transcription factor with known roles in various developmental processes.
Purpose of the Study:
- To investigate the role of Sox9 in the development of the musculoskeletal system.
- To determine how Sox9 expression influences muscle, tendon, and bone formation.
- To elucidate the specific contribution of Sox9 to progenitor cell differentiation and tissue integration.
Main Methods:
- Utilized double-transgenic mice to track Sox9 expression in muscle progenitor cells.
- Employed myoblastic cell lines for in vitro analysis of Sox9 function.
- Analyzed Sox9 expression patterns at different embryonic stages (E13 and E16).
Main Results:
- Sox9 expression was detected in tendon and bone progenitor cells at E13, and in bone at E16.
- Sox9 expression was confirmed in muscle progenitor cells but absent in mature muscle.
- Reduced Sox9 levels resulted in hypoplasia of cartilage and impaired muscle-tendon-bone attachments.
Conclusions:
- Sox9 plays an essential role in the coordinated development of the musculoskeletal system.
- Sox9 is required in progenitor cells of muscle, tendon, and bone for proper tissue formation and integration.
- The dynamic expression of Sox9 is critical for establishing functional musculoskeletal connections.
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