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DNA microarray analysis reveals novel gene expression profiles in collagen-induced arthritis
Sherry Thornton1, Dawn Sowders, Bruce Aronow
1William S. Rowe Division of Rheumatology, Children's Hospital Medical Center, Cincinnati, OH 45229, USA.
Clinical Immunology (Orlando, Fla.)
|December 17, 2002
Summary
Global gene expression analysis in collagen-induced arthritis (CIA) revealed distinct patterns differentiating early and late disease stages. This study identifies novel genes involved in arthritis pathology, advancing our understanding of joint destruction.
Area of Science:
- Immunology
- Molecular Biology
- Genetics
Background:
- Collagen-induced arthritis (CIA) is a common animal model for rheumatoid arthritis.
- Understanding the molecular mechanisms underlying CIA progression is crucial for developing effective treatments.
Purpose of the Study:
- To analyze global gene expression profiles in early and late stages of CIA.
- To identify genes associated with disease progression and histopathological changes.
- To uncover novel genes potentially involved in arthritis pathogenesis.
Main Methods:
- Analysis of global gene expression using 8734 complementary DNAs (cDNAs) in early and late CIA.
- Identification of significantly upregulated and downregulated genes (greater than twofold change).
- Hierarchical clustering to identify distinct gene expression patterns and correlation with histopathology.
Main Results:
- 330 cDNAs were induced and 55 downregulated in early or late CIA.
- Five distinct gene expression patterns were identified, differentiating disease stages and correlating with paw histopathology.
- Of 185 known genes, several are implicated in apoptosis, inflammation, and cellular proliferation.
- Follistatin-like gene showed high expression at the interface of inflammatory pannus and eroding bone, suggesting a role in joint destruction.
Conclusions:
- Global gene expression profiling effectively distinguishes early from late stages of CIA.
- Several novel genes associated with arthritis pathology, including joint destruction, were identified.
- Further characterization of these novel genes will enhance the understanding of arthritis mechanisms.