Influence of cytochrome P450 3A5 (CYP3A5) genetic polymorphism on dose-adjusted plasma levels of carbamazepine in epileptic patients in South Indian population

AIM: The aim of the study was to compare the dose-adjusted plasma levels of carbamazepine (CBZ) among expressers and nonexpressers of cytochrome P450 3A5 (CYP3A5)* 3 genotypes. SUBJECTS AND METHODS: The study was carried out in 100 epileptic patients who were on CBZ monotherapy. Steady-state plasma...

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Published inIndian journal of pharmacology Vol. 51; no. 6; pp. 384 - 388
Main Authors Ganesapandian, Mahalakshmi, Ramasamy, Kesavan, Adithan, Surendiran, Narayan, Sunil
Format Journal Article
LanguageEnglish
Published India Wolters Kluwer India Pvt. Ltd 01.11.2019
Medknow Publications and Media Pvt. Ltd
Medknow Publications & Media Pvt. Ltd
Wolters Kluwer - Medknow
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ISSN0253-7613
1998-3751
1998-3751
DOI10.4103/ijp.IJP_122_19

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Abstract AIM: The aim of the study was to compare the dose-adjusted plasma levels of carbamazepine (CBZ) among expressers and nonexpressers of cytochrome P450 3A5 (CYP3A5)* 3 genotypes. SUBJECTS AND METHODS: The study was carried out in 100 epileptic patients who were on CBZ monotherapy. Steady-state plasma CBZ levels were measured using reverse-phase high-performance liquid chromatography method, and genotyping of CYP3A5 was done using real-time polymerase chain reaction method. RESULTS: Patients inheriting CYP3A5*3/*3 variant (nonexpressers) had an increased plasma concentration of CBZ (4.86 μg/ml) when compared to patients inheriting either CYP3A5*1/*1 or CYP3A5*1/*3 (expressers) (4.3 μg/ml, P = 0.004). Nonexpressers had significantly increased plasma concentrations of CBZ when adjusted for dose and weight when compared to expressers (P < 0.002 and P < 0.001, respectively). The frequency of adverse reactions in expressers and nonexpressers was 12% and 9%, respectively. CONCLUSION: There is a significant influence of CYP3A5*3 genetic polymorphism (6986A>G) on dose-adjusted plasma levels of CBZ in epileptic patients in the South Indian population.
AbstractList The aim of the study was to compare the dose-adjusted plasma levels of carbamazepine (CBZ) among expressers and nonexpressers of cytochrome P450 3A5 (CYP3A5)* 3 genotypes.AIMThe aim of the study was to compare the dose-adjusted plasma levels of carbamazepine (CBZ) among expressers and nonexpressers of cytochrome P450 3A5 (CYP3A5)* 3 genotypes.The study was carried out in 100 epileptic patients who were on CBZ monotherapy. Steady-state plasma CBZ levels were measured using reverse-phase high-performance liquid chromatography method, and genotyping of CYP3A5 was done using real-time polymerase chain reaction method.SUBJECTS AND METHODSThe study was carried out in 100 epileptic patients who were on CBZ monotherapy. Steady-state plasma CBZ levels were measured using reverse-phase high-performance liquid chromatography method, and genotyping of CYP3A5 was done using real-time polymerase chain reaction method.Patients inheriting CYP3A5*3/*3 variant (nonexpressers) had an increased plasma concentration of CBZ (4.86 μg/ml) when compared to patients inheriting either CYP3A5*1/*1 or CYP3A5*1/*3 (expressers) (4.3 μg/ml, P = 0.004). Nonexpressers had significantly increased plasma concentrations of CBZ when adjusted for dose and weight when compared to expressers (P < 0.002 and P < 0.001, respectively). The frequency of adverse reactions in expressers and nonexpressers was 12% and 9%, respectively.RESULTSPatients inheriting CYP3A5*3/*3 variant (nonexpressers) had an increased plasma concentration of CBZ (4.86 μg/ml) when compared to patients inheriting either CYP3A5*1/*1 or CYP3A5*1/*3 (expressers) (4.3 μg/ml, P = 0.004). Nonexpressers had significantly increased plasma concentrations of CBZ when adjusted for dose and weight when compared to expressers (P < 0.002 and P < 0.001, respectively). The frequency of adverse reactions in expressers and nonexpressers was 12% and 9%, respectively.There is a significant influence of CYP3A5*3 genetic polymorphism (6986A>G) on dose-adjusted plasma levels of CBZ in epileptic patients in the South Indian population.CONCLUSIONThere is a significant influence of CYP3A5*3 genetic polymorphism (6986A>G) on dose-adjusted plasma levels of CBZ in epileptic patients in the South Indian population.
AIM: The aim of the study was to compare the dose-adjusted plasma levels of carbamazepine (CBZ) among expressers and nonexpressers of cytochrome P450 3A5 (CYP3A5)* 3 genotypes. SUBJECTS AND METHODS: The study was carried out in 100 epileptic patients who were on CBZ monotherapy. Steady-state plasma CBZ levels were measured using reverse-phase high-performance liquid chromatography method, and genotyping of CYP3A5 was done using real-time polymerase chain reaction method. RESULTS: Patients inheriting CYP3A5*3/*3 variant (nonexpressers) had an increased plasma concentration of CBZ (4.86 μg/ml) when compared to patients inheriting either CYP3A5*1/*1 or CYP3A5*1/*3 (expressers) (4.3 μg/ml, P = 0.004). Nonexpressers had significantly increased plasma concentrations of CBZ when adjusted for dose and weight when compared to expressers (P < 0.002 and P < 0.001, respectively). The frequency of adverse reactions in expressers and nonexpressers was 12% and 9%, respectively. CONCLUSION: There is a significant influence of CYP3A5*3 genetic polymorphism (6986A>G) on dose-adjusted plasma levels of CBZ in epileptic patients in the South Indian population.
The aim of the study was to compare the dose-adjusted plasma levels of carbamazepine (CBZ) among expressers and nonexpressers of cytochrome P450 3A5 genotypes. The study was carried out in 100 epileptic patients who were on CBZ monotherapy. Steady-state plasma CBZ levels were measured using reverse-phase high-performance liquid chromatography method, and genotyping of was done using real-time polymerase chain reaction method. Patients inheriting variant (nonexpressers) had an increased plasma concentration of CBZ (4.86 μg/ml) when compared to patients inheriting either or (expressers) (4.3 μg/ml, = 0.004). Nonexpressers had significantly increased plasma concentrations of CBZ when adjusted for dose and weight when compared to expressers ( < 0.002 and < 0.001, respectively). The frequency of adverse reactions in expressers and nonexpressers was 12% and 9%, respectively. There is a significant influence of genetic polymorphism (6986A>G) on dose-adjusted plasma levels of CBZ in epileptic patients in the South Indian population.
AIM: The aim of the study was to compare the dose-adjusted plasma levels of carbamazepine (CBZ) among expressers and nonexpressers of cytochrome P450 3A5 (CYP3A5)* 3 genotypes. SUBJECTS AND METHODS: The study was carried out in 100 epileptic patients who were on CBZ monotherapy. Steady-state plasma CBZ levels were measured using reverse-phase high-performance liquid chromatography method, and genotyping of CYP3A5 was done using real-time polymerase chain reaction method. RESULTS: Patients inheriting CYP3A5*3/*3 variant (nonexpressers) had an increased plasma concentration of CBZ (4.86 μg/ml) when compared to patients inheriting either CYP3A5*1/*1 or CYP3A5*1/*3 (expressers) (4.3 μg/ml, P = 0.004). Nonexpressers had significantly increased plasma concentrations of CBZ when adjusted for dose and weight when compared to expressers (P < 0.002 and P < 0.001, respectively). The frequency of adverse reactions in expressers and nonexpressers was 12% and 9%, respectively. CONCLUSION: There is a significant influence of CYP3A5*3 genetic polymorphism (6986A>G) on dose-adjusted plasma levels of CBZ in epileptic patients in the South Indian population.
Audience Academic
Author Narayan, Sunil
Adithan, Surendiran
Ramasamy, Kesavan
Ganesapandian, Mahalakshmi
AuthorAffiliation Department of Pharmacology, JIPMER, Puducherry, India
1 Department of Neurology, JIPMER, Puducherry, India
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  givenname: Kesavan
  surname: Ramasamy
  fullname: Ramasamy, Kesavan
  organization: Department of Pharmacology, JIPMER, Puducherry
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  surname: Adithan
  fullname: Adithan, Surendiran
  organization: Department of Pharmacology, JIPMER, Puducherry
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  givenname: Sunil
  surname: Narayan
  fullname: Narayan, Sunil
  organization: Department of Neurology, JIPMER, Puducherry
BackLink https://www.ncbi.nlm.nih.gov/pubmed/32029960$$D View this record in MEDLINE/PubMed
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10.1097/FPC.0b013e328348c6f2
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Keywords cytochrome P450 3A5
genetic polymorphisms
Carbamazepine
pharmacogenetics
Language English
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Snippet AIM: The aim of the study was to compare the dose-adjusted plasma levels of carbamazepine (CBZ) among expressers and nonexpressers of cytochrome P450 3A5...
The aim of the study was to compare the dose-adjusted plasma levels of carbamazepine (CBZ) among expressers and nonexpressers of cytochrome P450 3A5 genotypes....
The aim of the study was to compare the dose-adjusted plasma levels of carbamazepine (CBZ) among expressers and nonexpressers of cytochrome P450 3A5 (CYP3A5)*...
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SubjectTerms African Americans
Anticonvulsants
Carbamazepine
Chromatography
Convulsions & seizures
Cytochrome
Drug dosages
Enzymes
Epilepsy
Genetic aspects
Genetic polymorphisms
Genetic research
Genotypes
High performance liquid chromatography
Liquid chromatography
Metabolism
Minority & ethnic groups
Polymerase chain reaction
Polymorphism
Population
Primidone
Sample size
Statistical analysis
Studies
Time
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Title Influence of cytochrome P450 3A5 (CYP3A5) genetic polymorphism on dose-adjusted plasma levels of carbamazepine in epileptic patients in South Indian population
URI http://www.ijp-online.com/article.asp?issn=0253-7613;year=2019;volume=51;issue=6;spage=384;epage=388;aulast=Ganesapandian;type=0
https://www.ncbi.nlm.nih.gov/pubmed/32029960
https://www.proquest.com/docview/2348182292
https://www.proquest.com/docview/2352632381
https://pubmed.ncbi.nlm.nih.gov/PMC6984020
Volume 51
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