Abstract
Familial Mediterranean fever (FMF) is an autosomal-recessive autoinflammatory disorder common in Mediterranean populations. FMF is associated with mutations of the MEFV gene, which encodes pyrin. Functional studies suggest that pyrin is implicated in the maturation and secretion of IL-1. The IL-1 receptor antagonist or anti-IL1 monoclonal antibody may therefore represent a new approach to treat FMF. The aim of this report was to evaluate and discuss treatment of FMF with interleukin-1 targeting drugs. Electronic mailing lists of French pediatric and adult rheumatologist associations were used to call for FMF patients treated with interleukin-1 antagonists. A search for published FMF patients treated with interleukin-1 targeting drugs was performed by screening PubMed. Here, we report 7 cases of FMF patients treated with anakinra and/or canakinumab and discuss the clinical situations that may indicate the use of IL-1 blocking agents in FMF. The use of interleukin-1 targeting drugs was beneficial to all patients. The reasons for using interleukin-1 targeting drugs in FMF patients were as follows: (1) incomplete control of disease activity despite colchicine treatment; (2) high serum amyloid A levels despite colchicine treatment; (3) impossibility to use colchicine treatment because of severe side effects; (4) FMF in association with vasculitis. Interleukin-1 targeting drugs may be good candidates when looking for an alternative or supplementary treatment to colchicine. These observations highlight the need for controlled trials to further evaluate the safety and efficacy of interleukin-1 antagonists in FMF patients.
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