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P-221 - Association Between Microrna-206 Gene Polymorphisms and Bipolar Disorder in the han Chinese Population

  • Z. Wang (a1) (a2), S. Yu (a3), J. Chen (a1), Z. Li (a1), J. Huang (a1), C. Yuan (a1), W. Hong (a1), D. Peng (a1), Z. Wu (a1) and Y. Fang (a1)...

Abstract

Introduction:

Bioinformatic investigations indicate that has-mir-206 (microRNA-206, miRNA-206) could regulate BDNF protein synthesis by interfering with BDNF mRNA translation, which is disrupted in bipolar disorder (BPD).

Objectives:

This study is to investigate whether miRNA-206 gene variants were associated with BPD susceptibility in a Han Chinese population.

Methods:

342 patients who met DSM-IV criteria for bipolar disorder type I (BPD-I) or type II (BPD-II) and 386 matched health controls were enrolled into this study. the miRNA-206 gene and +/-500bp were selected for gene sequencing. for the case-control genetic comparisons, differences in the genotype and allele distributions between patients and controls were examined using Pearson's χ2 test.

Results:

Gene sequencing showed that there are two polymorphisms rs16882131(C/T) and rs62408583 (A/C) located at the upstream of miRNA-206 gene, which are complete linkage disequilibrium. the association analysis showed that there was no significant difference for genotype frequencies (χ2 = 2.075, df = 2, P = 0.354) or for allele frequencies (χ2 = 0.041, df = 1, P = 0.839) between BPD patients and controls. Similarly, no significant difference was found between BPD-I patients and controls (genotype χ2 = 1.411, df = 2, P = 0.494; allele χ2 = 0.380, df = 1, P = 0.538). However, there was significant difference between BPD-II patients and controls (genotype χ2 = 7.933, df = 2, P = 0.019; allele χ2 = 5.403, df = 1, P = 0.020).

Conclusions:

Our findings do not support that BPD susceptibility was associated with miRNA-206 gene polymorphisms in the studied Han Chinese population. the association between miRNA-206 gene polymorphisms and bipolar disorder type II is needed to be carefully interpreted. Further studies are necessary to elucidate the involvement miRNA-206 in the pathophysiology of BPD.

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P-221 - Association Between Microrna-206 Gene Polymorphisms and Bipolar Disorder in the han Chinese Population

  • Z. Wang (a1) (a2), S. Yu (a3), J. Chen (a1), Z. Li (a1), J. Huang (a1), C. Yuan (a1), W. Hong (a1), D. Peng (a1), Z. Wu (a1) and Y. Fang (a1)...

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P-221 - Association Between Microrna-206 Gene Polymorphisms and Bipolar Disorder in the han Chinese Population

  • Z. Wang (a1) (a2), S. Yu (a3), J. Chen (a1), Z. Li (a1), J. Huang (a1), C. Yuan (a1), W. Hong (a1), D. Peng (a1), Z. Wu (a1) and Y. Fang (a1)...
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