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1- MSc. Department of Genetics, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
2- PhD. Department of Genetics, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
3- Msc. Department of Genetics, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
4- PhD. Department of Psychiatry, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
5- PhD. Department of Food Hygiene, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
Abstract:  
Introduction: Genetic and environmental factors are involved in the incidence of schizophrenia and bipolar disorder. Many reports confirm that several common genes are connected with these two psychotic disorders.
Several neurotransmitters may be involved in the molecular mechanisms of schizophrenia and bipolar disorder. We aimed to estimate the role of two talent genes; DAOA in neurotransmission of glutamate and COMT in neurotransmission of dopamine to guide the treatment of schizophrenia and bipolar disorder.
Methods: Blood samples (N= 100 for schizophrenia, N=100 for bipolar I disorder and N=127 for case control) were collected from individuals unrelated in the south-west of Iran. The SNPs (rs947267 and rs3918342 for DAOA gene/ rs165599 and rs4680 for COMT gene) were genotyped using the PCR-RFLP method. Our finding was studied by Logistic Regression and Mantel-Haenszel chi square assays.
Result: We observed there is an association in rs3918342, rs165599 and rs4680 single nucleotide polymorphisms and schizophrenia and bipolar I disorder. Also, our data demonstrated that the rs947267 was connected to bipolar I disorder but there wasn’t any association between this SNP and schizophrenia.
Conclusion: In conclusion, this result supports the hypothesis that variations in DAOA and COMT genes may play a role in schizophrenia and bipolar disorder.
 
Type of Study: Original | Subject: Cellular and molecular Neuroscience
Received: 2017/02/1 | Accepted: 2018/05/26 | Published: 2018/05/26