Functional Characterisation of Human CYP2C9 Allelic Variants in COS-7 cells
Variability in activity of CYP2C9, which is involved in the metabolism of approximately 15% of current therapeutic drugs, is an important contributor to interindividual differences in drug response. To evaluate the functional alternations of CYP2C9*2, CYP2C9*3, CYP2C9*8, CYP2C9*11 and CYP2C9*31, ide...
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2016-04-01
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doaj-67ef1d1c6ad54d3cb435eddd60a96cb62020-11-24T23:02:11ZengFrontiers Media S.A.Frontiers in Pharmacology1663-98122016-04-01710.3389/fphar.2016.00098185468Functional Characterisation of Human CYP2C9 Allelic Variants in COS-7 cellsHuihui eDu0Zhiyun eWei1Yucai eYan2Yuyu eXiong3Xiaoqing eZhang4Lu eShen5Yunfeng eRuan6Xi eWu7Qingqing eXu8Lin eHe9Shengying eQin10Shanghai Jiao Tong UniversityShanghai Jiao Tong UniversityShanghai Jiao Tong UniversityShanghai Jiao Tong UniversityShanghai Jiao Tong UniversityShanghai Jiao Tong UniversityShanghai Jiao Tong UniversityShanghai Jiao Tong UniversityShanghai Jiao Tong UniversityShanghai Jiao Tong UniversityShanghai Jiao Tong UniversityVariability in activity of CYP2C9, which is involved in the metabolism of approximately 15% of current therapeutic drugs, is an important contributor to interindividual differences in drug response. To evaluate the functional alternations of CYP2C9*2, CYP2C9*3, CYP2C9*8, CYP2C9*11 and CYP2C9*31, identified in our previous study in Chinese Han population, allelic variants as well as the wild-type CYP2C9 were transiently expressed in COS-7 cells. Kinetic parameters (Km, Vmax and Clint) for S-warfarin 7-hydroxylation by these recombinant CYP2C9s were determined. Relative to CYP2C9.1, recombinant CYP2C9.3 and CYP2C9.11 exhibited significantly higher Km values, and all allelic variants showed significantly decreased Vmax and Clint values. Among all allelic variants, catalytic activity of CYP2C9.3 and CYP2C9.11 reduced the most (8.2% and 9.8% of Clint ratio, respectively; P<0.001). These findings should be useful for predicting the phenotype profiles of CYP2C9 in Chinese Han population, comparing the functional results of these alleles accurately, and finally optimizing pharmacotherapy of drug treatment.http://journal.frontiersin.org/Journal/10.3389/fphar.2016.00098/fullIn vitro Modelspharmacokineticscytochrome P450HPLCGenetic polymorphismsChinese han |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Huihui eDu Zhiyun eWei Yucai eYan Yuyu eXiong Xiaoqing eZhang Lu eShen Yunfeng eRuan Xi eWu Qingqing eXu Lin eHe Shengying eQin |
spellingShingle |
Huihui eDu Zhiyun eWei Yucai eYan Yuyu eXiong Xiaoqing eZhang Lu eShen Yunfeng eRuan Xi eWu Qingqing eXu Lin eHe Shengying eQin Functional Characterisation of Human CYP2C9 Allelic Variants in COS-7 cells Frontiers in Pharmacology In vitro Models pharmacokinetics cytochrome P450 HPLC Genetic polymorphisms Chinese han |
author_facet |
Huihui eDu Zhiyun eWei Yucai eYan Yuyu eXiong Xiaoqing eZhang Lu eShen Yunfeng eRuan Xi eWu Qingqing eXu Lin eHe Shengying eQin |
author_sort |
Huihui eDu |
title |
Functional Characterisation of Human CYP2C9 Allelic Variants in COS-7 cells |
title_short |
Functional Characterisation of Human CYP2C9 Allelic Variants in COS-7 cells |
title_full |
Functional Characterisation of Human CYP2C9 Allelic Variants in COS-7 cells |
title_fullStr |
Functional Characterisation of Human CYP2C9 Allelic Variants in COS-7 cells |
title_full_unstemmed |
Functional Characterisation of Human CYP2C9 Allelic Variants in COS-7 cells |
title_sort |
functional characterisation of human cyp2c9 allelic variants in cos-7 cells |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Pharmacology |
issn |
1663-9812 |
publishDate |
2016-04-01 |
description |
Variability in activity of CYP2C9, which is involved in the metabolism of approximately 15% of current therapeutic drugs, is an important contributor to interindividual differences in drug response. To evaluate the functional alternations of CYP2C9*2, CYP2C9*3, CYP2C9*8, CYP2C9*11 and CYP2C9*31, identified in our previous study in Chinese Han population, allelic variants as well as the wild-type CYP2C9 were transiently expressed in COS-7 cells. Kinetic parameters (Km, Vmax and Clint) for S-warfarin 7-hydroxylation by these recombinant CYP2C9s were determined. Relative to CYP2C9.1, recombinant CYP2C9.3 and CYP2C9.11 exhibited significantly higher Km values, and all allelic variants showed significantly decreased Vmax and Clint values. Among all allelic variants, catalytic activity of CYP2C9.3 and CYP2C9.11 reduced the most (8.2% and 9.8% of Clint ratio, respectively; P<0.001). These findings should be useful for predicting the phenotype profiles of CYP2C9 in Chinese Han population, comparing the functional results of these alleles accurately, and finally optimizing pharmacotherapy of drug treatment. |
topic |
In vitro Models pharmacokinetics cytochrome P450 HPLC Genetic polymorphisms Chinese han |
url |
http://journal.frontiersin.org/Journal/10.3389/fphar.2016.00098/full |
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