Correlation of N-acetyltransferase 2 genotype with isoniazid acetylation in Polish tuberculosis patients.

Abstract:

UNLABELLED:Isoniazid (INH), a key agent in the treatment of tuberculosis (TB), is metabolized primarily by the genetically polymorphic N-acetyltransferase 2 (NAT2) enzyme. Patients treated with INH can be classified as fast, intermediate, and slow acetylators. The objective of this study was to explore the relationship between NAT2 genotypes and the serum concentrations of INH. Blood samples from 130 patients were taken for the analysis, and plasma INH concentrations were determined by using the high-performance liquid chromatography (HPLC) technology. Acetylation genotype was determined on genomic DNA by using an allele-specific polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) assay. Once the NAT2 genotypes were established, patients were classified into three categories: fast, intermediate, and slow acetylators. Of the 130 patients studied, 84 (64.6%) were slow, 39 (30%) were intermediate, and 7 (5.4%) were fast acetylators. Analysis of INH concentrations in the blood of patients receiving the approximate doses of the drug revealed that, at the time intervals examined, the average concentration of INH was 2- to 7-fold higher among slow acetylators compared to fast and intermediate acetylators. CONCLUSION:Determining mutations in the NAT2 gene enabled the identification of the INH acetylation type in patients and the genotyping results were consistent with the phenotype determined by methods of measurement of drug bioavailability.

journal_name

Biomed Res Int

authors

Zabost A,Brzezińska S,Kozińska M,Błachnio M,Jagodziński J,Zwolska Z,Augustynowicz-Kopeć E

doi

10.1155/2013/853602

subject

Has Abstract

pub_date

2013-01-01 00:00:00

pages

853602

eissn

2314-6133

issn

2314-6141

journal_volume

2013

pub_type

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