Affordable Access

Access to the full text

Impact of CYP3A4*18 and CYP3A5*3 Polymorphisms on Imatinib Mesylate Response Among Chronic Myeloid Leukemia Patients in Malaysia

Authors
  • Maddin, Najlaa1
  • Husin, Azlan2
  • Gan, Siew Hua1
  • Aziz, Baba Abdul3
  • Ankathil, Ravindran1
  • 1 Universiti Sains Malaysia, Human Genome Centre, School of Medical Sciences, Kubang Kerian, Kelantan, 16150, Malaysia , Kubang Kerian (Malaysia)
  • 2 Universiti Sains Malaysia, Haemato-Oncology Unit and Department of Internal Medicine, School of Medical Sciences, Kubang Kerian, Kelantan, 16150, Malaysia , Kubang Kerian (Malaysia)
  • 3 International Medical University Malaysia, Kuala Lumpur, Bukit Jalil, Wilayah Persekutuan Kuala Lumpur, 57000, Malaysia , Bukit Jalil (Malaysia)
Type
Published Article
Journal
Oncology and Therapy
Publisher
Springer Healthcare
Publication Date
Nov 21, 2016
Volume
4
Issue
2
Pages
303–314
Identifiers
DOI: 10.1007/s40487-016-0035-x
Source
Springer Nature
Keywords
License
Green

Abstract

IntroductionImatinib mesylate (IM), a selective inhibitor of the BCR-ABL tyrosine kinase, is a well-established first-line treatment for chronic myeloid leukemia (CML). IM is metabolized mainly by cytochrome P450 (CYP) in the liver, specifically the CYP3A4 and CYP3A5 enzymes. Polymorphisms in these genes can alter the enzyme activity of IM and may affect its response. In this study, the impact of two single-nucleotide polymorphisms (SNPs), CYP3A5*3 (6986A>G) and CYP3A4*18 (878T>C), on IM treatment response in CML patients (n = 270; 139 IM resistant and 131 IM good responders) was investigated.MethodsGenotyping of CYP3A4*18 and CYP3A5*3 was performed using the polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) technique. The association between allelic variants and treatment response was assessed by means of odds ratio (OR) with 95% confidence intervals calculated by logistic regression.ResultsOur results indicated that CML patients carrying the heterozygous (AG) and homozygous variant (GG) genotype of CYP3A5*3 were associated with a significantly lower risk of acquiring resistance with OR 0.171; 95% CI: 0.090–0.324, p < 0.001 and OR 0.257; 95% CI: 0.126–0.525, p < 0.001, respectively. Although CML patients carrying the heterozygous (TC) genotype of CYP3A4*18 showed a lower risk of acquiring resistance toward IM (OR 0.648; 95% CI: 0.277–1.515), the association was not statistically significant (p = 0.316). No homozygous variant (CC) genotype of CYP3A4*18 was detected among the CML patients.ConclusionIt is concluded that polymorphism of CYP3A5*3 is associated with IM treatment response in Malaysian CML patients with carriers of CYP3A5*1/*3 and CYP3A5*3/*3 genotypes posing lower risk for development of resistance to IM.

Report this publication

Statistics

Seen <100 times