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Semaphorin 3A, a potential immune regulator in familial Mediterranean fever

Doron Rimar1, Itzhak Rosner1, Gleb Slobodin1

  • 1Rheumatology Unit, Bnai Zion Medical Center, Faculty of Medicine, Technion, Haifa, Israel.

Clinical and Experimental Rheumatology
|May 10, 2016
PubMed
Abstract

Insights

Semaphorin 3A (Sema3A) levels are lower in Familial Mediterranean Fever (FMF) patients, particularly on regulatory T and B cells during attacks and smoldering disease. Levels normalize in remission, suggesting a role in FMF pathogenesis.

Area of Science:

  • Immunology
  • Autoinflammatory Diseases
  • Cell Biology

Background:

  • Semaphorin 3A (Sema3A) is implicated in immune regulation, affecting T and B regulatory cells.
  • Familial Mediterranean Fever (FMF) is an autoinflammatory condition where regulatory T and B cells may play a role.

Purpose of the Study:

  • To investigate the role of Semaphorin 3A (Sema3A) in patients with Familial Mediterranean Fever (FMF).
  • To evaluate Sema3A levels and expression on regulatory T and B cells in FMF patients during different disease states.

Main Methods:

  • Serum samples and regulatory T and B cell expression of Sema3A were analyzed in 17 FMF patients (attack, remission), 8 FMF patients (smoldering disease), and 12 healthy controls.
  • Clinical parameters of FMF patients were assessed.

Main Results:

  • Serum Semaphorin 3A (Sema3A) levels were significantly lower in FMF patients (during attack, smoldering, and remission) compared to healthy controls.
  • Decreased Sema3A expression was observed on regulatory T and B cells in FMF patients during attacks and smoldering disease, normalizing in remission.

Conclusions:

  • Reduced Semaphorin 3A (Sema3A) expression on regulatory lymphocytes in Familial Mediterranean Fever (FMF) patients during active disease phases suggests its involvement in FMF.
  • These findings support a potential role for regulatory T cells in the resolution of FMF attacks.
  • Further research is warranted to confirm these preliminary observations.

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