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  • Title: Interleukin 1 components in cicatricial pemphigoid. Role in intravenous immunoglobulin therapy.
    Author: Kumari S, Bhol KC, Rehman F, Foster CS, Ahmed AR.
    Journal: Cytokine; 2001 May 21; 14(4):218-24. PubMed ID: 11448121.
    Abstract:
    Interleukin (IL-)1 is an important mediator of inflammatory responses and plays an important role in the pathogenesis of various autoimmune diseases. Cicatricial pemphigoid (CP) is a multisystem autoimmune inflammatory disease. We have studied the role of IL-1 in its pathogenesis. We have investigated the serum levels of IL-1 components (IL-1alpha, IL-1beta, and IL-1Ra), and determined the role of intravenous immunoglobulin (IVIg) therapy in patients with CP. Serum levels of IL-1alpha and beta were significantly higher in untreated patients with active disease compared to levels in patients in prolonged clinical remission and normal human controls (P<0.0001). The serum levels of IL-1Ra were higher in patients in prolonged clinical remission compared to patients with active disease (P=0.002). Hence elevated levels of IL-1alpha and beta and low levels of IL-1Ra correlate with disease activity. The levels of IL-1alpha and beta were statistically significantly higher in sera of CP patients with active disease pre-IVIg therapy compared to post-IVIg therapy (P<0.0001). Statistically significantly higher levels of IL-1Ra were present in post-IVIg treatment serum samples when compared to levels in pre-IVIg treatment (P<0.0001). In the in vitro experiments, the levels of IL-1alpha and beta produced by the peripheral blood mononuclear cells (PBMC) isolated from patients before IVIg therapy were significantly higher when compared to the PBMC isolated from post-IVIg patients (P<0.0001). Significantly higher levels of IL-1Ra were observed in the supernatants of PBMC collected from pre-IVIg patients and cultured with exogenously added IVIg, when compared to the levels of PBMC to which IVIg was not added (P<0.0001). IL-1 may be an important cytokine involved in the pathogenesis of CP. The regulation of IL-1 could be one of the mechanisms, amongst others, by which IVIg may exert its beneficial effect in the treatment of CP.
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