MEFV mutations in systemic onset juvenile idiopathic arthritis

Area of Science:

• Genetics
• Rheumatology
• Pediatrics

Background:

• Autoinflammatory diseases encompass monogenic and complex genetic conditions.
• Increased MEFV mutations observed in patients with PAN and HSP in FMF-prevalent regions.

Purpose of the Study:

• Investigate MEFV mutations in children with Systemic onset juvenile idiopathic arthritis (SoJIA).
• Determine if MEFV mutations impact SoJIA disease progression or complications.

Main Methods:

• Screened 35 children diagnosed with SoJIA for 12 MEFV mutations.
• Utilized control data from a previous study on Turkish population carrier frequency.

Main Results:

• Identified MEFV mutations in 14.28% of SoJIA patients, significantly higher than the population rate (5%).
• M694V was the predominant mutation (10% frequency in SoJIA).
• Six patients with MEFV mutations required biological therapy due to treatment resistance.

Conclusions:

• SoJIA patients exhibit a significantly higher frequency of MEFV mutations.
• Larger clinical studies are necessary to confirm the association between MEFV mutations and SoJIA, including its clinical course.