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Updated: May 28, 2026
07:23
Culture of Murine Embryonic Metatarsals: A Physiological Model of Endochondral Ossification
Published on: December 3, 2016
Changes in the chondrocyte and extracellular matrix proteome during post-natal mouse cartilage development
Richard Wilson1, Emma L Norris2, Bent Brachvogel3
1Murdoch Childrens Research Institute, Royal Children's Hospital, Parkville, Melbourne, Victoria 3052, Australia; Central Science Laboratory, University of Tasmania, Hobart, Tasmania 7001, Australia.
Molecular & Cellular Proteomics : MCP
|October 13, 2011
Summary
This study reveals key protein changes during mouse skeletal development, identifying novel proteins involved in cartilage growth and maturation. Understanding these proteins is vital for skeletal disorder research.
Area of Science:
- Biochemistry
- Developmental Biology
- Proteomics
Background:
- Skeletal growth relies on endochondral ossification and chondrocyte differentiation.
- Cartilage extracellular matrix (ECM) mutations cause skeletal disorders.
- Understanding cartilage development is crucial for disease mechanism research.
Purpose of the Study:
- To proteomically analyze mouse femoral head cartilage during development.
- To identify proteins involved in chondrocyte differentiation and ECM remodeling in vivo.
- To investigate changes in endoplasmic reticulum function during cartilage maturation.
Main Methods:
- Proteomic analysis of mouse femoral head cartilage at postnatal days 3 and 21.
- LTQ-Orbitrap tandem mass spectrometry to identify proteins.
- Meta-analysis comparing in vivo and in vitro cartilage development models.
- Immunolocalization of specific proteins.
Main Results:
- Identified 703 cartilage proteins, with 70 differentially abundant (q < 0.01).
- Found known markers (epiphycan, collagen X) and novel proteins (tenascin X, vitrin, Urb, emilin-1, SRPX, SRPX2).
- Observed down-regulation of collagen biosynthesis enzymes and up-regulation of calcium-binding proteins in the ER.
Conclusions:
- This study provides the first in vivo proteomic analysis of cartilage development in the mouse femoral head.
- Identified novel ECM and cell adhesion proteins with potential roles in skeletal development.
- Revealed shifts in endoplasmic reticulum function, including collagen synthesis and calcium binding, during chondrocyte maturation.
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