The Role of IFIH1 A946T Polymorphism in Rheumatoid Arthritis
Author Information
Author(s): Marinou Ioanna, Montgomery Douglas S, Dickson Marion C, Binks Michael H, Moore David J, Bax Deborah E, Wilson Anthony G
Primary Institution: The University of Sheffield
Hypothesis
Does the IFIH1 A946T variant contribute to the genetic susceptibility of rheumatoid arthritis?
Conclusion
The IFIH1 A946T variant is not significantly associated with rheumatoid arthritis, although IFIH1 mRNA levels are higher in RA patients.
Supporting Evidence
- Genotypes were equally distributed in both RA cases and healthy controls.
- Levels of IFIH1 mRNA were approximately twofold higher in RA cases compared to healthy controls.
- No association was detected after stratification by sex, age at onset, or other clinical features.
Takeaway
This study looked at a gene variant to see if it causes rheumatoid arthritis, but it turns out it doesn't, even though the gene is more active in people with the disease.
Methodology
Genotyping of the IFIH1 A946T variant was performed on 965 RA patients and 988 healthy controls, with gene expression measured using real-time PCR.
Limitations
The study had modest power (73%) to detect an effect, suggesting that further research with larger cohorts is needed.
Participant Demographics
965 Caucasian individuals with RA and 988 healthy controls, all 18 years or older.
Statistical Information
P-Value
0.3
Confidence Interval
0.8–1.0
Statistical Significance
p<0.0001
Digital Object Identifier (DOI)
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