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Gene Expression Profile Is Different between Intact and Enzymatically Digested Equine Articular Cartilage.
Sarah I M Lepage1, Rishi Sharma1, David Dukoff1
1Department of Biomedical Sciences, University of Guelph, Guelph, Ontario, Canada.
Cartilage
|March 8, 2019
Summary
Enzymatic digestion of cartilage alters gene expression. For accurate gene expression analysis, use intact cartilage, despite technical challenges in RNA isolation.
Area of Science:
- Biochemistry
- Molecular Biology
- Veterinary Science
Background:
- RNA isolation is crucial for gene expression studies.
- Articular hyaline cartilage presents challenges for RNA isolation due to its extracellular matrix.
- Enzymatic digestion is a common method to obtain chondrocytes for RNA extraction.
Purpose of the Study:
- To investigate the impact of enzymatic digestion on gene expression in equine articular cartilage.
- To compare gene expression profiles between intact cartilage and enzymatically digested chondrocytes.
- To determine if digestion affects common cartilage-associated genes.
Main Methods:
- Comparison of gene expression in intact cartilage versus digested chondrocytes.
- Analysis of samples from weight-bearing and non-weight-bearing regions of equine fetlock joints.
- Quantification of specific gene expression (SOX9, COL1A2, COL2A1, ACAN, COLX).
Main Results:
- Enzymatic digestion significantly decreased expression of COL1A2, COL2A1, and ACAN in both joint regions.
- COLX expression increased in non-weight-bearing cartilage after digestion.
- Significant differences in gene expression were observed between intact and digested cartilage.
Conclusions:
- Enzymatic digestion substantially alters the gene expression profile of articular cartilage.
- Accurate in vivo gene expression requires analysis of intact cartilage.
- Despite technical difficulties, intact cartilage is preferred for reliable gene expression determination.
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