Genetic Link Between IL-18 and Juvenile Idiopathic Arthritis in Japanese
Author Information
Author(s): Sugiura Tomoko, Maeno Nobuaki, Kawaguchi Yasushi, Takei Syuji, Imanaka Hiroyuki, Kawano Yoshifumi, Terajima-Ichida Hisae, Hara Masako, Kamatani Naoyuki
Primary Institution: Tokyo Women's Medical University
Hypothesis
Is there a genetic association between IL-18 gene haplotypes and juvenile idiopathic arthritis (JIA) in the Japanese population?
Conclusion
The S01/S01 diplotype configuration of the IL-18 gene is associated with increased susceptibility to juvenile idiopathic arthritis and higher IL-18 production in systemic JIA.
Supporting Evidence
- The frequency of the S01/S01 diplotype was significantly higher in JIA patients compared to healthy controls.
- Patients with systemic JIA carrying the S01/S01 diplotype had significantly higher serum IL-18 levels.
- Haplotype S01 was also associated with susceptibility to adult-onset Still's disease and rheumatoid arthritis.
Takeaway
This study found that a specific gene variant is more common in kids with a type of arthritis, which might make them produce more of a certain protein that causes inflammation.
Methodology
A case-control study was conducted analyzing haplotypes in patients with JIA and comparing them to healthy controls.
Limitations
The study population was relatively small, which may limit the generalizability of the findings.
Participant Demographics
Participants included 33 JIA patients (17 systemic, 10 polyarthritis, 6 oligoarthritis) and various control groups, all of Japanese ethnicity.
Statistical Information
P-Value
0.0045
Confidence Interval
95% CI = 1.55–8.14
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website