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  • Title: IL-18 is correlated with type-2 immune response in children with steroid sensitive nephrotic syndrome.
    Author: Printza N, Papachristou F, Tzimouli V, Taparkou A, Kanakoudi-Tsakalidou F.
    Journal: Cytokine; 2008 Nov; 44(2):262-8. PubMed ID: 18819819.
    Abstract:
    Children with steroid sensitive nephrotic syndrome (SSNS) is thought to have dysregulated type-1/type-2 cytokine network. Interleukin (IL)-18 is a cytokine, which may enhance both type-1 and type-2 responses, depending on the cytokines milieu. This prospective study aimed to assess type-1/type-2 cytokine synthesis and production profile in different stages of SSNS and define the potent involvement of IL-18. Twenty-three children with SSNS, aged 2.5-14 years, were studied; 23/23 both in active stage before treatment initiation and in remission still on steroids; 15/23 in remission off steroids as well. Data were compared with those obtained from 25 age-matched controls. The following parameters were assessed: Basic T cell populations, percentages of CD3+/CD69+/IFN-gamma+ and CD3+/CD69+/IL-4+ T cells as well as serum levels of IFN-gamma, IL-2, IL-4, IL-13 and IL-18. No difference in IL-2 levels was found between nephrotic children of all disease stages and controls (p>0.05). Percentage of CD3+/CD69+/IL-4+ T cells and serum levels of IL-4, IL-13 and IL-18 were significantly higher in the active stage of SSNS compared with the remission stages and controls (p<0.05). On the contrary, percentage of CD3+/CD69+/IFN-gamma+ T cells as well as serum IFN-gamma were significantly lower during active disease stage compared with remission stages and controls (p<0.05). In children with SSNS, of all disease stages, serum levels of IL-18 were significantly correlated with both IL-4 and IL-13 (r=0.628 and p<0.0001, r=0.71 and p<0.0001, respectively). It seems that a type-2 cytokine synthesis and production pattern prevails in children with active SSNS and IL-18 expression is significantly correlated with this type-2 immune response.
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