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• W2257996013 abstract "Inter-individual and inter-ethnic variations in drug metabolism are creating an obstacle in providing efficient and effective drug treatments especially for drugs with narrow therapeutic windows. This thesis is contributes to the understanding of the molecular mechanism of these variations. Paper I is an introduction to the inter-individual and inter-ethnic differences in CYP2C9 catalysed drug metabolism. Wide inter-individual differences were observed in the metabolic ratio of losartan to E-3174 metabolite even among individuals who were not carrying defective alleles CYP2C9*2 and CYP2C9*3. Inter-ethnic variation was observed in the metabolism of losartan between CYP2C9 wild type Koreans and Swedes. An allelic variation in the intronic region between exon 8 and 9 of CYP2C9, IVS8-109A>T was observed to cause a lower CYP2C9 activity in Swedes but not Koreans. Paper II studied the combination of age, CYP2C9 genotype, ethnicity, smoking habit, weight and sex as a predictor of CYP2C9 metabolic ratio variability. Ethnicity was the main significant factor influencing between subject-variability in CYP2C9 enzyme activity. Additionally, CYP2C9 genotype and smoking were significant contributors to the variation. Grouping the subjects based on their ethnicity, we found that CYP2C9 genotype is a major predictor for both Koreans and Swedes (27% and 40% of the variability respectively). The smoking effect was non-significant in the Swedes but remains as a factor in the Koreans. The reason behind the smoking effect in Koreans is unidentified. Paper III investigated the possibility of Behcet’s disease as a CYP2C9 inducer. A Swedish ultra-rapid CYP2C9 metaboliser was diagnosed with this disease and this study tested the possibility in Turkish healthy subjects to have a lower CYP2C9 activity than Behcet’s disease patients. Interestingly, the Behcet’s disease patients were shown to have a significantly low CYP2C9 metabolic activity. The factors of genetics, medication and inflammation-related biomolecules are suspected to have caused this down-regulation. We did not find evidence of CYP2C9 genotype and typical Behcet’s disease medication, colchicine having any influence on the observed low CYP2C9 metabolic activity. It is very possible that inflammation response agent caused this inhibitory effect on CYP2C9 activity. Paper IV investigated the effect of the P450 oxidoreductase (POR)*28 variant on the metabolic activity of CYP2C9. We screened all Swedish and Koreans CYP2C9*1/*1 subjects for POR* 5, *13 and *28. No subject was found to carry *5 or *13. Interestingly, Swedish individuals who carry POR*28 allele were observed to display a 1.40 fold increase in CYP2C9 enzyme activity compared to none-POR*28 carriers. We screened the ultra-rapid metaboliser for this variant and she was also a carrier of this variant. More studies should be done to investigate the effect of other SNPs in POR gene to the metabolic activity of drug metabolising enzymes. LIST OF SCIENTIFIC PAPERS This thesis is based on the following publications: I. Hatta FH, Teh LK, Hellden A, Hellgren KE, Roh HK, Salleh MZ, Aklillu E, Bertilsson L (2012) Search for the molecular basis of ultra-rapid CYP2C9-catalysed metabolism: relationship between SNP IVS8-109A>T and the losartan metabolism phenotype in Swedes Eur J Clin Pharmacol 68:1033-1042 II. Hatta FH, Lundblad M, Ramsjo M, Kang JH, Roh HK, Bertilsson L, Eliasson E, Aklillu E (2015) Differences in CYP2C9 genotype and enzyme activity between Swedes and Koreans of relevance for personalized medicine: role of ethnicity, genotype, smoking, age, and sex. OMICS 6: 346-353 III. Goktas MT, Hatta F, Karaca O, Kalkisim S, Kilic L, Akdogan A, Babaoglu MO, Bozkurt A, Hellden A, Bertilsson L, Yasar U (2015) Lower CYP2C9 activity in Turkish patients with Behcet's disease compared to healthy subjects: a down-regulation due to inflammation? Eur J Clin Pharmacol 71:1223-1228. IV. Hatta FH and Aklillu E. The effect of P450 oxidoreductase (POR)*28 variant allele on CYP2C9 metabolic activity in Swedish and Korean healthy subjects. New varsion of manucsript accepted by OMICS 28 October 2015. OMI2015-0159.R1" @default.
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• W2257996013 creator A5034479272 @default.
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• W2257996013 date "2015-11-12" @default.
• W2257996013 modified "2023-09-23" @default.
• W2257996013 title "The impact of genetics, environmental, and geographical factors on inter-individual and inter-ethnic differences in CYP2C9-catalysed drug metabolism" @default.
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• W2257996013 cites W1963791073 @default.
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• W2257996013 cites W1967970335 @default.
• W2257996013 cites W1968825981 @default.
• W2257996013 cites W1968833927 @default.
• W2257996013 cites W1969695802 @default.
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• W2257996013 cites W1979862336 @default.
• W2257996013 cites W1980883948 @default.
• W2257996013 cites W1982290436 @default.
• W2257996013 cites W1987375927 @default.
• W2257996013 cites W1988229163 @default.
• W2257996013 cites W1993314207 @default.
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• W2257996013 cites W2010427019 @default.
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• W2257996013 cites W2030978880 @default.
• W2257996013 cites W2031642214 @default.
• W2257996013 cites W2038118250 @default.
• W2257996013 cites W2040081769 @default.
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• W2257996013 cites W2041121356 @default.
• W2257996013 cites W2041379086 @default.
• W2257996013 cites W2043645215 @default.
• W2257996013 cites W2045328772 @default.
• W2257996013 cites W2053996322 @default.
• W2257996013 cites W2055004532 @default.
• W2257996013 cites W2055622235 @default.
• W2257996013 cites W2057186028 @default.
• W2257996013 cites W2063473876 @default.
• W2257996013 cites W2065133143 @default.
• W2257996013 cites W2065976317 @default.
• W2257996013 cites W2066851444 @default.
• W2257996013 cites W2078293971 @default.
• W2257996013 cites W2079247052 @default.
• W2257996013 cites W2090478674 @default.
• W2257996013 cites W2097404249 @default.
• W2257996013 cites W2098025302 @default.
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