Generic placeholder image

Current Pharmacogenomics and Personalized Medicine


ISSN (Print): 1875-6921
ISSN (Online): 1875-6913

Research Article

Frequencies of Xenobiotic-Metabolizing Enzyme Gene Polymorphisms CYP3A4, GSTM1 and GSTT1 in a Filipino Population

Author(s): Roldan M. De Guia, Ariana Anne P. Baluyot, Emmanuel Austin A. Banzon Jr., Marice R. Bernal, Ralph Rayman B. Bio, Carlo Antonio G. Boado, Ma. Elena J. Manansala and Jovencio G. Apostol

Volume 12, Issue 1, 2014

Page: [51 - 55] Pages: 5

DOI: 10.2174/187569211201140610122555

Price: $65


The inter-patient differences in drug response is documented to be attributable to heritable genetic variations in the nucleotide sequence of drug-metabolizing enzymes. The identification of variant allele frequencies in specific ethnic groups is important to individualize drug dosing and improve therapeutics. This study aimed to detect single-nucleotide polymorphism (SNP) in CYP3A4 and the homozygous deletion (0/0) of GSTM1 and GSTT1 in a Filipino population. Onehundred and forty-two Filipino subjects were genotyped for the CYP3A4*18 SNP using PCR-RFLP and the GSTM1 0/0 and GSTT1 0/0 by basic PCR followed by agarose gel electrophoresis. In the study population, the frequency of the CYP3A4*18 variant allele was found to be 2.11%. The percentage of GSTM1 0/0 observed was 64.08 while that of GSTT1 0/0 was 48.59. These frequencies complement studies in other Asian populations highlighting the importance of the screening for future prospects of individualized medicines.

Keywords: CYP3A4*18, GSTM1, GSTT1, gene polymorphisms, drug metabolism.

Rights & Permissions Print Export Cite as
© 2023 Bentham Science Publishers | Privacy Policy