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Pfapa (Periodic Fever, Aphthous Stomatitis, Pharyngitis, and Adenitis) Syndrome: An Overview of Genetic Background Publisher Pubmed



Asna Ashari K1 ; Rezaei N2, 3, 4
Authors
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Authors Affiliations
  1. 1. Department of Pediatrics, Children’s Medical Center, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Research Center for Immunodeficiencies, Children’s Medical Center, Tehran University of Medical Sciences, Dr Qarib St, Keshavarz Blvd, Tehran, 14194, Iran
  3. 3. Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA), Universal Scientific Education and Research Network (USERN), Tehran, Iran

Source: Clinical Rheumatology Published:2021


Abstract

Periodic fever, aphthous stomatitis, pharyngitis, and cervical adenitis (PFAPA) syndrome is an autoinflammatory disorder with an uncertain origin. PFAPA manifestations occur in the form of regular attacks accompanied by a rise in inflammatory markers. Regarding the family clustering of PFAPA and its similarities with other autoinflammatory disorders such as familial Mediterranean fever, a genetic basis is suggested for the disease. Studies have conducted genome analysis in order to find possible gene variants in PFAPA. Associations with variations in several genes such as MEFV, NLRP, TNFRSF1A, CARD15/NOD2, and MVK have been suggested and analyzed. Inflammasomes, intracellular proteins that are members of innate immunity and activate interleukin-1b (IL-1b) and IL-18, are proposed to be involved in PFAPA pathogenesis. The investigations show that a single gene cannot be found in association with PFAPA, and that it might have a multifactorial or polygenic basis, in which an environmental trigger can provoke inflammasome activation and activate PFAPA flares. © 2021, International League of Associations for Rheumatology (ILAR).
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