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[Analysis of the profile of CD4+ cells in Behçet's disease]
N Sugi1, M Nakazawa, S Nakamura
1Department of Ophthalmology, Yokohama City University School of Medicine, Kanagawa-ken, Japan.
Insights
Behçet's disease patients with active eye inflammation show significantly higher levels of interleukin-2 producing type 1 helper T (Th1) cells compared to inactive cases and healthy controls. This suggests Th1 cells are crucial in Behçet's ocular disease pathogenesis.
Area of Science:
- Immunology
- Cell Biology
- Ophthalmology
Context:
- Behçet's disease involves cell-mediated immunity and cytokine dysregulation.
- CD4+ T helper cells are classified into subsets like Th1 and Th2 based on cytokine profiles.
- Understanding T helper cell subsets is key to Behçet's disease pathogenesis.
Purpose:
- To analyze the numbers of interleukin-2 (IL-2) producing type 1 helper T (Th1) cells and IL-4 producing Th2 cells in Behçet's disease patients.
- To compare Th1 and Th2 cell counts between active Behçet's disease, inactive Behçet's disease, and normal controls.
- To investigate the role of Th1 and Th2 cells in the immunopathogenesis of ocular inflammation in Behçet's disease.
Summary:
- Flow cytometry was used to quantify IL-2 producing Th1 cells and IL-4 producing Th2 cells in 22 Behçet's disease patients and 19 controls.
- Patients were grouped by ocular inflammation activity: active (13) and inactive (9).
- A significant increase in IL-2 producing CD4+ Th1 cells was observed in Behçet's patients with active uveoretinitis compared to inactive cases and controls (p < 0.005 and p < 0.01, respectively).
- No significant difference in IL-4 producing Th2 cells was found among the groups.
- These findings suggest Th1 cells are implicated in the immunopathogenesis of ocular inflammation in Behçet's disease.
Impact:
- The study highlights the specific role of Th1 cells in active ocular inflammation associated with Behçet's disease.
- Quantifying Th subsets may aid in managing Behçet's disease, particularly its ocular manifestations.
- This research contributes to understanding the immune mechanisms underlying Behçet's disease, potentially informing targeted therapies.
Abstract:
The cell-mediated immune response and disorders of the cytokine-producing cells play an important role in the pathogenic mechanisms of Behçet's disease. Recently, CD4+ T helper cells have been categorized into at least two distinct subsets based on their profiles of cytokine production. We analyzed the number of interleukin (IL)-2 producing type 1 helper T (Th1) cells and IL-4 producing Th2 cells from 22 patients (male: 12, female: 10) with Behçet's disease and 19 normal controls (male: 9) by flow cytometric analysis. The patients with Behçet's disease were categorized into two groups by the activity of ocular inflammation; one group comprised the active cases (13 patients) and the other the inactive cases (9 patients). Peripheral blood mononuclear cells (PBMCs) from patients and normal controls were stimulated with immobilized anti-CD3 mAb for 6 hours and immunostained with anti IL-2 and anti IL-4 mAbs followed by fluorescein isothiocyanate (FITC) conjugated 2nd Abs. The number of IL-2 producing CD4+ cells in Behçet's disease patients with active uveoretinitis was significantly higher than that from both inactive cases (p < 0.005) and controls (p < 0.01). In contrast, the number of IL-4 producing CD4+ cells showed no significant difference among the groups. These results may indicate that Th1 cells play an important role in the immunopathogenesis of ocular inflammation of Behçet's disease. Thus, analysis of Th subsets in Behçet's disease may be useful for management of the disease.
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