Polymorphisms of cytochrome P450 1A1, glutathione S-transferases M1 and T1 in a Turkish population

Toxicol Lett. 2004 Jun 15;151(1):311-5. doi: 10.1016/j.toxlet.2003.12.075.


Intra-ethnic as well as inter-ethnic differences are known to exist in the frequencies of cytochrome P450 (CYP) 1A1, glutathione S-transferase (GST) M1, and GSTT1 gene polymorphisms with which associations have been shown for several cancers. In this study, CYP1A1 m2, GSTM1, and GSTT1 gene polymorphisms were determined among 133 healthy individuals of a Turkish population. On the basis of polymerase chain reaction/restriction fragment length polymorphism (PCR/RFLP) methodology, the frequency of CYP1A1 m2 mutation was determined. The multiplex PCR protocol was used to determine the frequency of the deleted genotypes of both GSTM1 and GSTT1 genes. The frequencies of Ile/Ile (wild type), Ile/Val (heterozygous variant), and Val/Val (homozygous variant) CYP1A1 m2 genotypes were 90.2%, 9.8%, and 0%, respectively. The frequencies of the deleted GSTM1 (null) and GSTT1 (null) genotypes were 51.9% and 17.3%, respectively. These results show that the frequencies of the CYP1A1 m2, GSTM1, and GSTT1 gene polymorphisms in a Turkish population are similar to Caucasian populations.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Cytochrome P-450 CYP1A1 / chemistry
  • Cytochrome P-450 CYP1A1 / genetics*
  • DNA / chemistry
  • DNA / genetics
  • Glutathione Transferase / chemistry
  • Glutathione Transferase / genetics*
  • Humans
  • Male
  • Middle Aged
  • Polymerase Chain Reaction
  • Polymorphism, Genetic
  • Turkey


  • DNA
  • Cytochrome P-450 CYP1A1
  • GSTT2 protein, human
  • glutathione S-transferase T1
  • Glutathione Transferase
  • glutathione S-transferase M1