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Title: Genetic associaton between schizophrenia & type-2 diabetes
Author: Mathur, Aditi
Awarding Body: University of Aberdeen
Current Institution: University of Aberdeen
Date of Award: 2011
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Methods: In a genetic association study, 17 single nucleotide polymorphisms (SNPs) were genotyped in the PPARG, PLA2G4A, PTGS2 and AKT1 genes in 221 British nuclear families. In the gene functional study, U937 cells were treated with clozapine (1μg/ml and 2μg/ml) for 48 hours and 96 hours. Quantitative real-time PCR analysis was used to measure the mRNA expression levels of the genes of interest in clozapine-treated and untreated cells. Results: Eight SNPs tested across the PPARG gene did not show allelic association with schizophrenia. An association was detected at rs2745557 in the PTGS2 locus (χ2=4.19, p= 0.041) and rs10798059 in the PLA2G4A locus (χ2=4.28, p=0.039), but these associations did not survive after 10,000 permutations (global p=0.246). Allelic association for the AKT1 gene was detected at rs1130214 (χ2=6.28, p=0.012) and at rs11847866 (χ2=4.64, p=0.031) only although the global p-value of overall associations for the AKT1 was 0.059 after 10,000 permutations. Haplotype analysis showed a disease association for the rs1130214-rs2494746-rs11847866 haplotypes (χ2= 10.18, df= 4, p=0.037), of which the T-G-A haplotype was excessively transmitted (χ2=6.93, p=0.008) and his haplotypic association survived the Bonferroni correction (p=0.04). The expression of the MTCH2 gene showed a significant decrease in mRNA expression (combined p=0.001) and that of the PPARG gene showed a significant increase (combined p=0.005) in the cells treated with 1μg/ml clozapine for 96 hours. Conclusions: The present results support the AKT1 gene association with schizophrenia as reported in previous studies; both the MTCH2 and PPARG genes may be involved in the development of clozapine-induced obesity and in an increased risk of T2D.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available