Year : 2014 | Volume
: 140 | Issue : 6 | Page : 736--743
5-Hydroxytryptamine (serotonin) 2A receptor gene polymorphism is associated with schizophrenia
Subash Padmajeya Sujitha1, Asha Nair1, Moinak Banerjee2, Srinivasan Lakshmanan3, Sampth Harshavaradhan4, Soosiah Gunasekaran1, Anilkumar Gopinathan1
1 School of Biosciences & Technology, VIT University, Vellore, India
2 Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, India
3 Government Vellore Medical College, Vellore, India
4 Sri Narayani Hospital & Research Centre, Vellore, India
Background & objectives: Schizophrenia, the debilitating neuropsychiatric disorder, is known to be heritable, involving complex genetic mechanisms. Several chromosomal regions associated with schizophrenia have been identified during the past; putative gene (s) in question, to be called the global signature for the pathophysiology of the disease, however, seems to evade us. The results obtained from the several population-wise association-non association studies have been diverse. w0 e therefore, undertook the present study on Tamil speaking population in south India to examine the association between the single nucleotide polymorphisms (SNPs) at the serotonin receptor gene (5HT2A) and the occurrence of the disease.
Methods: Blood samples collected from 266 cases and 272 controls were subjected to genotyping (PCR amplification of candidate SNPs, RFLP and sequencing). The data on the SNPs were subjected to statistical analysis for assessing the gene frequencies in both the cases and the controls.
Results: The study revealed significant association between the genotypic frequencies of the serotonin receptor polymorphism and schizophrenia. SNP analysis revealed that the frequencies of GG (30%, rs6311) and CC genotypes (32%, rs6313), were higher in patients (P<0.05) than in controls. The study also showed presence of G and C alleles in patients. s0 ignificant levels of linkage disequilibrium (LD) were found to exist between the genotype frequencies of rs6311 and rs6313.
Interpretation & conclusions: This study indicated an association between the SNPs (rs6311 and rs6313) of the serotonin receptor 5HT2A and schizophrenia. HapMap analysis revealed that in its genotype distribution, the Tamil speaking population was different from several other populations across the world, signifying the importance of such ethnicity-based studies to improve our understanding of this complex disease.
Professor, School of Biological Sciences, VIT University, Vellore 632 014, Tamil Nadu
|How to cite this article:|
Sujitha SP, Nair A, Banerjee M, Lakshmanan S, Harshavaradhan S, Gunasekaran S, Gopinathan A. 5-Hydroxytryptamine (serotonin) 2A receptor gene polymorphism is associated with schizophrenia.Indian J Med Res 2014;140:736-743
|How to cite this URL:|
Sujitha SP, Nair A, Banerjee M, Lakshmanan S, Harshavaradhan S, Gunasekaran S, Gopinathan A. 5-Hydroxytryptamine (serotonin) 2A receptor gene polymorphism is associated with schizophrenia. Indian J Med Res [serial online] 2014 [cited 2019 Oct 21 ];140:736-743
Available from: http://www.ijmr.org.in/article.asp?issn=0971-5916;year=2014;volume=140;issue=6;spage=736;epage=743;aulast=Sujitha;type=0