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Association Study between Norepinephrine Transporter Gene Polymorphism and Schizophrenia in a Korean Population.

ABSTRACT: OBJECTIVE:We aimed to investigate possible associations between three norepinephrine transporter gene (SLC6A2) single nucleotide polymorphisms (T182C, A3081T, and G1287A) and schizophrenia. Also, we investigated the relationships of those polymorphisms with clinical severity and characteristics of schizophrenia. METHODS:Participants were 220 schizophrenia patients in the acute phase and 167 healthy controls. The genotype, allele frequency, and haplotype of each group were analyzed for T182C, A3081T, and G1287A polymorphisms. Of the 220 schizophrenia patients, 163 patients were evaluated with the Positive and Negative Syndrome Scale (PANSS) and the Korean version of the Calgary depression scale for schizophrenia (K-CDSS) at baseline. RESULTS:We found no significant differences between the schizophrenia patient group and the control group in genotype distribution or allele frequency of the three tested polymorphisms. Likewise, we could not find any significant differences in genotype or allele frequency by analyzing according to gender. In the haplotype study, no significant association emerged between specific haplotype combinations and schizophrenia. We also found no association between clinical scales (PANSS and K-CDSS) and the studied polymorphisms. CONCLUSION:Our results suggest that the investigated polymorphisms of the NET gene are not associated with susceptibility to schizophrenia or its clinical features in a Korean population. However, this study remains significant because it is the first haplotype study to investigate associations between NET gene (SLC6A2) single nucleotide polymorphisms and schizophrenia in a Korean population. Future research with a larger sample size and more genetic markers is needed to replicate our results.

SUBMITTER: Choo M

PROVIDER: S-EPMC4620314 | biostudies-literature | 2015 Oct

REPOSITORIES: biostudies-literature

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Association Study between Norepinephrine Transporter Gene Polymorphism and Schizophrenia in a Korean Population.

Choo Mira M Hwang Jung-A JA Jeon Sang Won SW Oh So-Young SY Yoon Ho-Kyoung HK Lee Heon-Jeong HJ Kim Yong-Ku YK

Psychiatry investigation 20150930 4

<h4>Objective</h4>We aimed to investigate possible associations between three norepinephrine transporter gene (SLC6A2) single nucleotide polymorphisms (T182C, A3081T, and G1287A) and schizophrenia. Also, we investigated the relationships of those polymorphisms with clinical severity and characteristics of schizophrenia.<h4>Methods</h4>Participants were 220 schizophrenia patients in the acute phase and 167 healthy controls. The genotype, allele frequency, and haplotype of each group were analyzed ...[more]

PMID: 26508968

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Project description:BACKGROUND:Attention Deficit Hyperactivity Disorder (ADHD) can lead to drastic problems for the patient and its worldwide prevalence is 5%-12%. It also has many comorbidities with other disorders, and the genetic contribution seems the most significant cause. OBJECTIVES:The current study was conducted to investigate the association between norepinephrine transporter-3081 (A/T) polymorphisms and ADHD in Iranian population. PATIENTS AND METHODS:Participants were chosen from children and adolescents diagnosed with ADHD referred to Imam Hoseyn Hospital. A child and adolescent psychiatrist confirmed the diagnosis using the Kiddie-Sads-Present and Lifetime Version (K-SADS-PL) semi-structural interview. The control group was from pupils of schools in Tehran (capital city of Iran) who had no history or presence of psychiatric and medical complications. Also, a child and adolescent psychiatrist confirmed their health using the K-SADS-PL semi-structural interview. Genetic examinations were DNA distraction, Polymerase Chain Reaction (PCR), and Restricted Fragment Length Polymorphism (RFLP), which were conducted according to standard protocols. The statistical analysis was performed using chi-square and Fisher's exact test in SPSS version 21. RESULTS:The percentages of ADHD subtypes for combined, inattentive, and hyperactive/impulsive were 72.2%, 17.2%, and 11.9%, respectively. There was no significant association between norepinephrine transporter polymorphism and ADHD (P = 0.81). Moreover, no significant relationship was found between gender [male (P = 0.92) and female (P = 0.63)] and polymorphism. No significant association was found between subtypes of ADHD [combined (P = 0.46), inattentive (P = 0.41), hyperactive/impulsive (P = 0.32)] and polymorphism SCL6A2. This lack of association can also be seen in gender in every subtype. CONCLUSIONS:The results of the study show no significant association between norepinephrine transporter polymorphism SCL6A2 and ADHD.

Dataset Information

Association Study between Norepinephrine Transporter Gene Polymorphism and Schizophrenia in a Korean Population.

Publications

Association Study between Norepinephrine Transporter Gene Polymorphism and Schizophrenia in a Korean Population.

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