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Prevalence of the MEFV gene mutations in childhood polyarteritis nodosa

Fatoş Yalçinkaya1, Z Birsin Ozçakar, Ozgür Kasapçopur

  • 1Ankara University School of Medicine, Division of Pediatric Nephrology, Ankara, Turkey. yalcinkaya@tr.net

The Journal of Pediatrics
|November 24, 2007
PubMed
Abstract

Insights

Alterations in the Mediterranean fever (MEFV) gene are linked to polyarteritis nodosa (PAN). MEFV gene mutations increase susceptibility to PAN, potentially by promoting inflammation and exaggerated responses to infections.

Area of Science:

  • Genetics
  • Immunology
  • Rheumatology

Background:

  • Familial Mediterranean fever (FMF) is an autoinflammatory disorder caused by mutations in the MEFV gene.
  • Polyarteritis nodosa (PAN) is a systemic vasculitis with an unclear etiology.
  • The potential role of MEFV gene mutations in non-FMF conditions like PAN requires investigation.

Purpose of the Study:

  • To determine if MEFV gene mutations are a susceptibility factor for developing PAN.
  • To investigate the prevalence of specific MEFV mutations in pediatric patients diagnosed with PAN.

Main Methods:

  • A cohort of 29 pediatric patients with PAN was studied.
  • The presence of six common MEFV gene mutations (p.M694V, p.M680I, p.M694I, p.V726A, p.K695R, p.E148Q) was analyzed.

Main Results:

  • MEFV mutations were detected in 38% of the pediatric PAN patients.
  • Fifteen MEFV mutations were identified across 58 chromosomes.
  • Homozygous p.M694V mutation was found in 10.3% of patients, and a compound heterozygous mutation (p.V726A/p.E148Q) in 3.4%.

Conclusions:

  • The study confirms that MEFV gene alterations are significant susceptibility factors for PAN development.
  • MEFV gene mutations may contribute to PAN pathogenesis by creating a proinflammatory state.
  • Mutations in the MEFV gene might also lead to an exaggerated response to streptococcal infections, contributing to PAN.

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