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Updated: Sep 18, 2025
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Author Spotlight: Enhancing Rheumatoid Arthritis Research Through HR-pQCT Imaging Analysis
Published on: October 6, 2023
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Association of Cannabinoid CB2 Receptor Q63R Variant With Rheumatoid Arthritis in an Iranian Cohort
Ali Nateghi1, Samin Zamani1, Alireza Tahamtan1,2
1Department of Microbiology, Golestan University of Medical Sciences, Gorgan, Iran.
International Journal of Genomics
|June 24, 2025
Summary
The CNR2 gene
Area of Science:
- Immunogenetics
- Rheumatology
Background:
- Rheumatoid arthritis (RA) is a chronic autoimmune joint disease.
- The endocannabinoid system regulates immune balance; CNR2 gene variations may impair this.
- Dysfunctional endocannabinoid signaling is linked to autoimmune disorders.
Purpose of the Study:
- To investigate the association between the CNR2 gene Q63R polymorphism and RA in an Iranian population.
- To explore the role of CNR2 gene variations in rheumatoid arthritis susceptibility.
Main Methods:
- Genotyping of 120 RA patients and 120 controls using TaqMan assay.
- Analysis of demographic and clinical data.
- Statistical analysis of inheritance models (codominant, dominant, recessive, overdominant, additive) using SNPStats.
Main Results:
- Significant associations between CNR2 Q63R polymorphism and RA were found under codominant, dominant, and additive models.
- RR genotype carriers showed a >2.5-fold increased risk of developing RA.
- This is the first study to examine this association in an Iranian population.
Conclusions:
- The CNR2 gene may play a role in RA susceptibility in Iranian patients.
- Further large-scale studies are needed to confirm the role of CB2 receptors in RA.
- Potential for CNR2 as a biomarker for RA diagnosis and therapy.
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