[No authors listed]
CYP2C19*2(G681A), CYP2C19*3(G636A), CYP2D6*4(C188T), CYP2D6*2(C2938T, G4268C), CYP3AP1*3- G44A and CYP3A5*3(A22893G) are the most common polymorphisms detected among Chinese that may influence the efficacy of vinorelbine-based therapies to treat non-small-cell lung cancer (NSCLC). We detected the genotypes of these polymorphisms by PCR-RFLP in 59 patients with NSCLC and assessed their responses to vinorelbine. CYP2D6*4(C188T), CYP3AP1*3 (G -44 A) and CYP3A5*3 were found to be associated with response to vinorelbine. For the 2D6*4 polymorphism, the 18 of 32 (56.25%) patients with homozygous (C/C) responded to this therapy, while 6 of 27 (22.22%) of those heterozygous (C/T) at this site responded. (chi2=5.68, p < 0.05) For the 3AP1*1/*3 polymorphism, 12 of 42 (28.57%) patients with homozygous (A/A) responded, while 12 of 17 (70.59%) with heterozygous (A/G) and homozygous (G/G) responded (chi2=7.19, p < 0.01). CYP3A5*3 polymorphism has a result corresponding to 3AP1*3 polymorphism. Other polymorphisms were not associated with response to vinorelbine. No significant difference in toxicity and survival was observed according to SNP genotype.
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