Erschienen in:
01.03.2009 | Original Research Article
Study of NAT2 Gene Polymorphisms in an Indian Population
Association with Plasma Isoniazid Concentration in a Cohort of Tuberculosis Patients
verfasst von:
Neera Singh, Sudhisha Dubey, Saravanan Chinnaraj, Anil Golani, Dr Anurupa Maitra
Erschienen in:
Molecular Diagnosis & Therapy
|
Ausgabe 1/2009
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Abstract
Methods: NAT2 genotyping of 201 subjects was carried out by PCR-restriction fragment length polymorphism (PCR-RFLP) analysis and DNA sequencing. Acetylation phenotypes were predicted from NAT2 genotypes. The association of au]|NAT2 genotypes with plasma isoniazid concentrations was determined by measuring the plasma levels in tuberculosis patients at different time points using reverse-phase high-performance liquid chromatography (HPLC).
Results: The predominant alleles found in this study population were NAT2*5B and NAT2*6A, while NAT2*5B/*6A and NAT2*6A/*6A were the most frequent genotypes; the frequency varied widely from other reported studies in the Indian population. The distribution of slow, intermediate, and fast acetylators was 55%, 32%, and 13%, respectively. We observed relatively higher plasma concentrations of isoniazid in our patients than those reported in other similar studies, and they correlated well with the au]|NAT2 genotypes.
Conclusion: The results suggested high variation in the frequencies of au]|NAT2 alleles and genotypes within Indian populations, which influence plasma isoniazid concentrations. Further studies of the relationship between NAT2 genotypes and adverse drug events are required to make genotyping a helpful tool for optimizing the isoniazid therapeutic response and minimizing adverse drug reactions, particularly in countries with a high burden of tuberculosis.