ArticleInflammation research : official journal of the European Histamine Research Society ... [et al.]2026
Immature leukocyte and plasma-induced cell death reveal subclinical immune activation in EGPA patients in remission.
Article in Inflammation research : official journal of the European Histamine Research Society ... [et al.], 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Inflammatory blood count ratios discriminate disease activity and remain persistently elevated during glucocorticoid-free remission in ANCA-associated vasculitis.Clinical and experimental medicine · 2026Article
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13 authors.
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Abstract
objectiveANCA-associated vasculitis (AAV) is a group of rare autoimmune diseases characterized by pauci-immune necrotizing inflammation of small to medium-sized blood vessels, in which ANCAs targeting neutrophil antigens promote neutrophil activation, endothelial injury and organ damage. Although AAV follows a relapsing-remitting course, the immune landscape during remission remains poorly defined. This study investigated leukocyte alterations across AAV subtypes and examined whether plasma from ANCA-positive and ANCA-negative eosinophilic granulomatosis with polyangiitis (EGPA) patients in remission modulates peripheral blood mononuclear cell (PBMC) responses in healthy donors (HDs).
methodsPeripheral blood was collected from 62 AAV patients in remission and 28 age- and sex-matched HDs. Leukocyte morphology was assessed via May-Grünwald Giemsa staining. Circulating cytokines and chemokines were quantified by ELISA. HD-derived PBMCs were exposed to plasma from EGPA patients, antiphospholipid-positive controls, or HDs. Cell death, metabolic activity, and cytokine production were evaluated using Trypan Blue, Annexin V/PI staining, MTT assays, and ELISA. Chemotaxis assays assessed cell migration in response to conditioned media, with or without Anakinra or CCR1 inhibitor J113863.
resultsAAV patients showed increased immature neutrophils. Plasma from ANCA-positive EGPA patients induced PBMC death, inflammasome-related cytokine release, and secretion of chemotactic and proangiogenic factors. Conditioned media enhanced immune cell migration in a cytokine-dependent manner.
conclusionThese findings indicate persistent subclinical immune activation during AAV remission, particularly in ANCA-positive EGPA, suggesting a role for mononuclear cell-mediated inflammation in relapse risk and the potential utility of immune monitoring.
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