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  • Title: Influence of IL-1RN intron 2 variable number of tandem repeats (VNTR) polymorphism on the age at onset of neuropsychiatric symptoms in Wilson's disease.
    Author: Gromadzka G, Członkowska A.
    Journal: Int J Neurosci; 2011 Jan; 121(1):8-15. PubMed ID: 20942594.
    Abstract:
    ABSTRACT Wilson's disease (WND) is an autosomal recessive copper storage disease characterized with diverse clinical pictures with the hepatic and/or neuropsychiatric symptoms manifesting at variable age. On the basis of the existing knowledge on possible copper-proinflammatory cytokines interactions, we hypothesized that in WND hereditary, over-/underexpression of PC or anti-inflammatory cytokines may have an impact on the course of the disease. We analyzed the clinical manifestations of WND in relationship to polymorphisms within genes for interleukin-1 receptor antagonist (IL1RN intron 2 VNTR polymorphism), interleukin-1α (IL1A G4845T), IL-1β (IL1B C-511T), IL-6 (IL6 G-174C), and tumor necrosis factor (TNF G-308A) in a total sample of 332 patients. The IL1B C-511T and IL1RN VNTR polymorphisms had an impact on copper metabolism parameters. None of the studied gene polymorphisms had effect on the mode of WND manifestation (neuropsychiatric vs. hepatic). Carriership of the IL1RN *2 allele was related to earlier WND onset, especially among patients with neuropsychiatric form of the disease (median 27.5 vs. 32.0 years, p = .003). Because of the crucial modulatory role of IL1ra on IL-1α and IL-1β proinflammatory functions, IL1ra and its interactions may play a role in the pathogenesis of the neurodegenerative process in WND; our results need to be replicated, possibly in different ethnic groups.
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