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Hip ontogenesis: how evolution, genes, and load history shape hip morphotype and cartilotype
Tom Hogervorst1, Wouter Eilander, Joost T Fikkers
1Orthopaedic Surgeon, Haga Hospital, The Hague, The Netherlands. thogervorst@gmail.com
Clinical Orthopaedics and Related Research
|August 29, 2012
Summary
Developmental hip disorders arise from a complex interplay between mechanical forces and genetics, influencing hip shape and cartilage resilience. Understanding these factors is key to developing therapies for osteoarthritis prevention.
Area of Science:
- Orthopedics
- Developmental Biology
- Genetics
Background:
- Developmental hip disorders (DHDs) like hip dysplasia are considered variants of normal hip morphology.
- Femoroacetabular morphology in DHDs is thought to cause osteoarthritis (OA) via mechanical overload and genetic patterning.
- Individual variations in hip morphology and OA progression in DHDs remain unclear.
Purpose of the Study:
- To identify mechanical factors influencing proximal femur growth and development.
- To determine genes and genetic mechanisms involved in hip ontogenesis.
Main Methods:
- Systematic literature review of mechanical and genetic factors in hip ontogeny.
- Focused on advancements in imaging, evolution, and genetics related to adult hip morphology.
- Synthesized current understanding of mechanical and genetic influences on hip development.
Main Results:
- Mechanical factors, influenced by human evolution, contribute to load histories predisposing to DHD.
- Genetic factors likely involve multiple genes with small effect sizes, making single-gene explanations for DHD unlikely.
- The interaction of genes and load history shapes hip morphotype, cartilage robustness (cartilotype), and OA resistance.
Conclusions:
- Future therapies should aim to improve both hip morphotype and cartilotype.
- Enhanced phenotyping, hip morphology classification, and population studies are needed.
- Developing tools to quantify load histories and further investigate exercise's role in cartilotype modification is crucial.
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