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Molecular ontogeny of the skeleton
B Frank Eames1, Luis de la Fuente, Jill A Helms
1Department of Orthopaedic Surgery, University of California at San Francisco, California, USA.
Birth Defects Research. Part C, Embryo Today : Reviews
|September 6, 2003
Summary
Skeletal development traditionally viewed as endochondral and intramembranous ossification is re-evaluated. A new molecular and cellular paradigm explains skeletal formation and disorders, moving beyond outdated histogenic criteria.
Area of Science:
- Developmental Biology
- Molecular Biology
- Orthopedics
Background:
- Traditional classification of skeletal development into endochondral and intramembranous ossification faces contradictions.
- Many bones described as endochondral utilize intramembranous processes, and some membranous bones exhibit transient chondrogenesis.
Purpose of the Study:
- To propose a new paradigm for skeletal tissue formation based on molecular and cellular criteria.
- To review regulatory molecules and tissue interactions governing chondrogenesis and osteogenesis.
Main Methods:
- Review of clinical examinations of human skeletal syndromes.
- Identification and characterization of regulatory molecules involved in skeletal development.
Main Results:
- Identified key regulatory molecules directing chondrogenesis and osteogenesis across all skeletal elements.
- Characterized tissue interactions that may control the expression of these regulatory molecules.
Conclusions:
- A molecular and cellular approach provides a more accurate framework for understanding skeletal development.
- This new paradigm aids in explaining both normal and abnormal skeletal development and associated syndromes.