Increased expression of cytochrome P4501B1 in peripheral leukocytes from lung cancer patients

Ming Fang Wu, Wen Jun Wu, Gee Chen Chang, Chin Yi Chen, Suh Woan Hu, Wen Tin Tsai, Huei Lee, Pinpin Lin

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)


Aryl hydrocarbon receptor (AhR)-regulated cytochrome P4501A1 (CYP1A1) and P4501B1 (CYP1B1) have been shown to metabolically activate some carcinogens. In the present study, we utilized the real-time reverse transcription-polymerase chain reaction (RT-PCR) assay to compare AhR, CYP1A1 and CYP1B1 mRNA levels in peripheral leukocytes from 42 lung cancer patients and 59 non-cancer subjects. We found that CYP1A1 and CYP1B1 levels, but not AhR, were significantly higher in patients than in non-cancer subjects. After stratified by gender, CYP1A1 levels were significantly higher in female patients than in female controls. After controlling for age, smoking status and gender, lung cancer patients were more likely to be CYP1B1 high expressers (P<0.05). Neither AhR nor CYP1A1 levels was associated with lung cancer incidence. Leu-Val polymorphism of CYP1B1 was not associated with lung cancer risk in our study. These data indicated that CYP1B1 mRNA levels were elevated in peripheral leukocytes of lung cancer patients. © 2004 Elsevier Ireland Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)211-219
Number of pages9
JournalToxicology Letters
Issue number2
Publication statusPublished - Apr 21 2004
Externally publishedYes


  • Aryl hydrocarbon receptor
  • Cytochrome P4501A1
  • Cytochrome P4501B1
  • Lung cancer

ASJC Scopus subject areas

  • Toxicology


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