Lack of HLH in FMF.

IF 2.8 3区医学 Q1 PEDIATRICS

Pediatric Rheumatology Pub Date : 2025-02-08 DOI:10.1186/s12969-025-01064-9

Ozge Basaran, Erdal Sag, Elif Arslanoglu Aydın, Busra Aydın, Nur Kübra Tasdemir, Elif Celikel, Yagmur Bayındır, Semanur Özdel, Yelda Bilginer, Alexei A Grom, Seza Ozen

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引用次数: 0

Abstract

Background: Macrophage activation syndrome (MAS) is a severe complication of systemic juvenile idiopathic arthritis (sJIA), driven by excessive activation of T cells and macrophages, resulting in a cytokine storm. IFN-γ and IL-18 play crucial roles, with monocyte and macrophage hyperresponsiveness to IFN-γ amplifying MAS-related inflammation. Familial Mediterranean Fever (FMF), an autosomal recessive disease, is characterized by recurrent fever episodes due to MEFV gene mutations. Despite intense inflammation in FMF, MAS is rare. This study aimed to compare in vitro responsiveness of peripheral blood mononuclear cells (PBMCs) to IFN-γ between sJIA/MAS and FMF patients.

Methods: Five sJIA/MAS and five FMF patients were included. PBMCs were stimulated in vitro with IFN-γ for 45 min. Levels of IFN-γ-induced chemokines CXCL9, CXCL10, and IL-18 in supernatants were measured using cytometric bead arrays before and after stimulation.

Results: PBMCs from MAS patients produced higher baseline CXCL9 levels compared to FMF patients in a flare, with differences increasing post-IFN-γ stimulation. IFN-γ stimulation also upregulated IL-18 production in MAS patients but not in FMF patients.

Conclusion: Enhanced responsiveness to IFN-γ distinguishes sJIA/MAS from FMF patients, which may explain the lower occurrence of MAS in FMF.

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来源期刊

Pediatric Rheumatology PEDIATRICS-RHEUMATOLOGY

CiteScore

4.10

自引率

8.00%

发文量

审稿时长

>12 weeks

期刊介绍： Pediatric Rheumatology is an open access, peer-reviewed, online journal encompassing all aspects of clinical and basic research related to pediatric rheumatology and allied subjects. The journal’s scope of diseases and syndromes include musculoskeletal pain syndromes, rheumatic fever and post-streptococcal syndromes, juvenile idiopathic arthritis, systemic lupus erythematosus, juvenile dermatomyositis, local and systemic scleroderma, Kawasaki disease, Henoch-Schonlein purpura and other vasculitides, sarcoidosis, inherited musculoskeletal syndromes, autoinflammatory syndromes, and others.