title: No association of the MCP-1 promoter A-2518G polymorphism with bipolar disorder in the Korean population.
abstract: It has been suggested that bipolar disorder is associated with altered immune function. Monocyte chemoattractant protein-1 (MCP-1) is a chemokine that influences both neural and immune functions. We thus hypothesized that MCP-1 may be related to the development or pathophysiology of bipolar disorder. In this case-control study, we investigated the association between the A-2518G single nucleotide polymorphism (SNP) of the MCP-1 promoter and bipolar disorder. Patients with bipolar disorder (n=183; bipolar I=145, bipolar II=38) and healthy controls (350) were recruited for the study. No significant allelic or genotypic association was detected between the A-2518G polymorphism and any sample of bipolar disorder patients. When we pooled the healthy controls and the cases of bipolar I disorder from previous Korean studies and this study, we again found no significant association. No significant difference in either allele frequency or genotype distribution was observed between bipolar I and bipolar II disorders. There was no difference in the age at onset of bipolar disorder among the three genotype groups. Our data suggest that the A-2518G polymorphism of MCP-1 is not a major susceptibility factor for bipolar disorder in the Korean population. However, the physiological role of MCP-1 is highly suggestive of its being associated with bipolar disorder, and further analyses of other SNPs of MCP-1 remain to be performed.
authors.affiliation: Clinical Research Institute, Seoul National University Hospital, Seoul 110-744, Republic of Korea.
authors.forename: Myoung-Sun
authors.initials: MS
authors.lastname: Roh
authors.forename: Kyu Young
authors.initials: KY
authors.lastname: Lee
authors.forename: Eun-Jeong
authors.initials: EJ
authors.lastname: Joo
authors.forename: Namyoung
authors.initials: N
authors.lastname: Lee
authors.forename: Yong Sik
authors.initials: YS
authors.lastname: Kim
mesh_terms: D000328:Adult; D017668:Age of Onset; D001714:Bipolar Disorder / Q000208:ethnology / Q000235:genetics* / Q000378:metabolism; D001921:Brain / Q000378:metabolism / Q000503:physiopathology; D001923:Brain Chemistry / Q000235:genetics*; D016022:Case-Control Studies; D018932:Chemokine CCL2 / Q000235:genetics*; D004252:DNA Mutational Analysis; D005260:Female; D005787:Gene Frequency; D005819:Genetic Markers / Q000235:genetics; D020022:Genetic Predisposition to Disease / Q000235:genetics*; D005820:Genetic Testing; D005838:Genotype; D006801:Humans; D007723:Korea / Q000208:ethnology; D008297:Male; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D011401:Promoter Regions, Genetic / Q000235:genetics*
chemical_list: C111835:CCL2 protein, human; D018932:Chemokine CCL2; D005819:Genetic Markers