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Published on: June 6, 2025
Engaging anti-inflammatory mechanisms and triggering inflammatory effector apoptosis during Familial Mediterranean
T K Davtyan1, G S Hakobyan, S A Avetisyan
1Laboratory of Immunology and Virology, Armenicum Research Centre, CJSC Armenicum, Yerevan, Republic of Armenia. tigdav@excite.com.
Objective:
To investigate endotoxin-induced tolerance, intracellular cytokine synthesis polarization and monocyte apoptosis during Familial Mediterranean Fever (FMF).
Methods:
Lipopolysaccharide (LPS)-induced tolerance, intracellular cytokine synthesis and monocyte apoptosis were determined in FMF patients by flow cytometry using whole blood cell culture technique.
Results:
Endotoxin homo- and cross-tolerance, detected as the percentage of TNF-alpha synthesizing monocytes, developed in whole blood preparations of patients in attack period, but not during remission. The induction of anti-inflammatory cytokine synthesis polarization and enhancement of iodine-lithium-alpha-dextrin- and LPS-induced monocyte apoptosis was observed in FMF patients during the attack, whereas monocytes from patients in remission period exhibited proinflammatory cytokine polarization and resistance to the repeated LPS-induced apoptosis. Colchicine induced anti-inflammatory cytokine synthesis and caused down-modulation of monocyte apoptosis, whereas cytokines did not alter LPS-induced monocyte apoptosis.
Conclusion:
The self-limited nature of attacks during FMF may represent periods of inflammation resolution compensatory to continued sub-clinical inflammation during the remission.
Insights
Familial Mediterranean Fever (FMF) patients exhibit endotoxin tolerance and altered monocyte apoptosis during attacks, suggesting inflammation resolution. Remission periods show proinflammatory responses and apoptosis resistance.
Area of Science:
- Immunology
- Genetics
- Inflammation
Background:
- Familial Mediterranean Fever (FMF) is an autoinflammatory disorder.
- Understanding immune dysregulation in FMF is crucial for treatment.
Purpose of the Study:
- To investigate endotoxin tolerance, cytokine polarization, and monocyte apoptosis in FMF patients.
- To differentiate immune responses during FMF attacks versus remission.
Main Methods:
- Lipopolysaccharide (LPS)-induced tolerance, cytokine synthesis, and monocyte apoptosis were analyzed.
- Flow cytometry and whole blood cell culture techniques were employed.
Main Results:
- FMF patients in attack developed endotoxin tolerance and enhanced monocyte apoptosis.
- During remission, monocytes showed proinflammatory polarization and apoptosis resistance.
- Colchicine treatment modulated cytokine synthesis and reduced monocyte apoptosis.
Conclusions:
- FMF attacks may involve inflammation resolution mechanisms.
- Immune responses in FMF differ significantly between attack and remission phases.
- These findings offer insights into FMF pathogenesis and colchicine's effects.
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