title: CYP and GST polymorphisms and survival in advanced non-small cell lung cancer patients.
abstract: Several polymorphisms in cytochrome P-450s (CYP)s and Glutathione S-transferases (GST)s have been reported to be associated with survival rates of patients with non-small cell lung cancer (NSCLC) but the studies in this regard are scarce and the results are contradictory. In this study, CYP1A1 (Ile462Val), CYP1B1(Asn453Ser), GST M1, GSTP1 exon 5 (Ile105Val) and exon 6(Ala114Val) and GSTT1 polymorphisms were determined in 138 patients with advanced NSCLC to evaluate their role in survival. Of the studied CYP and GST polymorphisms only GSTP1 exon 6 variant significantly altered (improved) the survival compared to wild type (p=0.036) with median survival of 22.2 months and 16.1 months, respectively. Multivariate analysis also revealed a significant reduction of adjusted hazard ratio of death associated only with the GSTP1 exon 6 variant genotype of 0.45 (95% confidence interval (95% CI), 0.23-0.89, p=0.022). These results show that the GSTP1 exon 6 variant genotype is associated with improved survival in the patients with advanced NSCLC.
  
  
  BACKGROUND
  Cytochrome P-450, glutathione S-transferase, non small cell lung cancer, polymorphism, survival.
authors.affiliation: Department of Toxicology, Ankara University, Ankara, Turkey.
authors.forename: A O
authors.initials: AO
authors.lastname: Ada
authors.forename: S
authors.initials: S
authors.lastname: C Kunak
authors.forename: F
authors.initials: F
authors.lastname: Hancer
authors.forename: S
authors.initials: S
authors.lastname: Bilgen
authors.forename: S H
authors.initials: SH
authors.lastname: Suzen
authors.forename: S
authors.initials: S
authors.lastname: Alpar
authors.forename: M
authors.initials: M
authors.lastname: Gulhan
authors.forename: B
authors.initials: B
authors.lastname: Kurt
authors.forename: M
authors.initials: M
authors.lastname: Iscan
mesh_terms: D000328:Adult; D000368:Aged; D001189:Aryl Hydrocarbon Hydroxylases; D002289:Carcinoma, Non-Small-Cell Lung / Q000235:genetics* / Q000401:mortality; D019363:Cytochrome P-450 CYP1A1 / Q000235:genetics*; D065633:Cytochrome P-450 CYP1B1; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics*; D005260:Female; D051549:Glutathione S-Transferase pi / Q000235:genetics; D005982:Glutathione Transferase / Q000235:genetics*; D006801:Humans; D008175:Lung Neoplasms / Q000235:genetics* / Q000401:mortality; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic
chemical_list: D003577:Cytochrome P-450 Enzyme System; D001189:Aryl Hydrocarbon Hydroxylases; C585496:CYP1B1 protein, human; D019363:Cytochrome P-450 CYP1A1; D065633:Cytochrome P-450 CYP1B1; C413545:glutathione S-transferase T1; C496556:GSTP1 protein, human; D051549:Glutathione S-Transferase pi; D005982:Glutathione Transferase