A novel variant in dopamine receptor type 2 gene is associated with schizophrenia

Authors

Farina Hanif, Dow University of Health Sciences, OJHA Campus, Karachi, Pakistan
Qurat-Ul-Ain Amir, Dow University of Health Sciences, OJHA Campus, Karachi, Pakistan
Washdev Washdev, Dow University of Health Sciences, OJHA Campus, Karachi, Pakistan
Fareena Bilwani, Aga Khan UniversityFollow
Shabana Usman Simjee, H.E.J. Research Institute of Chemistry, University of Karachi, Pakistan
Zeba Haque, Dow University of Health Sciences, OJHA Campus, Karachi, Pakistan

Document Type

Report

Department

Biological and Biomedical Sciences

Abstract

Background: Being the primary target of antipsychotic therapy, dopamine receptor type 2 (DRD2) remains a point of interest in schizophrenia pathology. Polymorphisms in DRD2 have been shown to alter patients' response to antipsychotics. DRD2 SNP rs6275 (C>T) have found to be associated with schizophrenia in different populations; however, data remains inconsistent.
Aim of the study: Keeping in view the genetic diversity the present study was aimed to explore association of rs6275 with schizophrenia in population from Pakistan.
Method: Using Diagnostic and statistical Manual 5 (DSM 5) criteria, 100 schizophrenia cases and 100 controls (individuals without any psychiatric illness) were enrolled in the study. Severity of illness was determined using PANSS score. Genotyping was done via Sanger sequencing. MEGA-X was used to align the sequences, Expasy translate tool was used to translate nucleotide sequences. Difference in genotype and allele frequencies between cases and controls was determined using χ² test.
Result: No significant difference in genotype or allele frequencies of rs6275 (p >0.0.5) was found between cases and controls. Interestingly, a novel SNP (C>A, Pro297Thr) was spotted during electropherogram analysis at position chr11:113412805. Significant difference was found in genotype and allele frequency of this novel SNP among schizophrenia cases and controls (p = 0.003).
Conclusion: No association of rs6275 was observed with schizophrenia in Pakistani population. However, the study found significant association of a novel missense SNP of DRD2 at chr11:113412805 (C>T) with schizophrenia in Pakistani population. A large-scale multicenter study will be required to confirm the association of this novel SNP with schizophrenia.

Comments

Volume, issue, and pagination are not provided by the author/publisher

Publication (Name of Journal)

Archives of Medical Research

Recommended Citation

Hanif, F., Amir, Q., Washdev, W., Bilwani, F., Simjee, S. U., Haque, Z. (2020). A novel variant in dopamine receptor type 2 gene is associated with schizophrenia. Archives of Medical Research.
Available at: https://ecommons.aku.edu/pakistan_fhs_mc_bbs/887