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  • Title: The MCP-1 gene (SCYA2) and mood disorders: preliminary results of a case-control association study.
    Author: Altamura AC, Mundo E, Cattaneo E, Pozzoli S, Dell'osso B, Gennarelli M, Vergani C, Trabattoni D, Arosio B, Clerici M.
    Journal: Neuroimmunomodulation; 2010; 17(2):126-31. PubMed ID: 19923858.
    Abstract:
    The aim of this case-control study was to investigate the potential role of the A-2518G polymorphism of the gene of monocyte chemoattractant protein 1 (MCP-1, a cytokine playing an important role in innate immunity) in conferring susceptibility to mood disorders. The sample studied included 96 outpatients with DSM-IV-TR diagnosis of major depressive disorder, bipolar disorder I (BD I) or BD II and 161 matched healthy controls. All subjects were genotyped for the A-2518G polymorphism of the MCP-1 gene. Genotypic and allelic associations were explored between patients and controls and across the different diagnostic groups (chi(2) tests). No genotypic (chi(2) = 8.215, d.f. = 6, p = 0.223) or allelic (chi(2) = 5.058, d.f. = 3, p = 0.168) association for the A-2518G polymorphism of SCYA2 was found considering cases and controls. Nevertheless, important correlations were observed when patients were divided into diagnostic subgroups. A significantly higher frequency of the AA genotype (chi(2) = 7.233, d.f. = 2, p = 0.027) and of the A allele (chi(2) = 4.730, d.f. = 1, p = 0.030) was observed in subjects with BD. In addition, independently from diagnosis, a higher number of lifetime suicide attempts was found in subjects with the AA genotype of the A-2518G polymorphism of the MCP-1 gene (F = 3.802, p = 0.026). The present preliminary results, though limited by the relatively small sample, suggest a possible role of the SCYA2 in conferring susceptibility to BD and, if confirmed, may represent a biological discriminative influence between mood disorder subtypes.
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