Genetic Susceptibility to Squamous Cell Carcinoma of the Lung in Relation to Cigarette Smoking Dose

Kei Nakachi, Kazue Imai, Shin ichi Hayashi, Junko Watanabe, Kaname Kawajiri, Shin ichi Hayashi, Junko Watanabe, Kaname Kawajiri

Research output: Contribution to journalArticlepeer-review

294 Citations (Scopus)


Cytochrome P450IA1 is responsible for the metabolic activation of benzo(a)pyrene in cigarette smoke; an association of lung cancer with DNA polymorphisms of P450IA1 gene was shown in our previous study. In this paper, we investigated the interindividual difference of geneti cally determined susceptibility to squamous cell carcinoma of the lung in relation to cigarette smoking dose. We tirsi compared the total amounts of cigarettes consumed over the lifetime of patients and showed that the patients with a “susceptible” P450IA1 gene genotype contracted carci noma after fewer cigarettes (mean ± SD, 31.3 ±12.8 x 10^4 cigarettes (n = 12)] than those with other genotypes [42.5 ±18.2 x 10^4(n = 33)], with a statistical significance of P < 0.05. Next, we carried out a casecontrol study to estimate the odds ratios of susceptible to nonsusceptible individuals in relation to the cumulated cigarette dose. We thus showed that the individuals with the susceptible genotype were at remarkably high risk with an odds ratio of 7.31 (95% confidence interval, 2.13 to 25.12) at a low dose level of cigarette smoking and that the difference in susceptibility between genotypes was reduced at high dose levels.

Original languageEnglish
Pages (from-to)5177-5180
Number of pages4
JournalCancer Research
Issue number19
Publication statusPublished - 1991 Oct
Externally publishedYes

ASJC Scopus subject areas

  • Oncology
  • Cancer Research


Dive into the research topics of 'Genetic Susceptibility to Squamous Cell Carcinoma of the Lung in Relation to Cigarette Smoking Dose'. Together they form a unique fingerprint.

Cite this