Does the polymorphism of cytochrome P-450 2E1 affect the metabolism of N,N-dimethylformamide? Comparison of the half-lives of urinary N-methylformamide

Tetsuo Nomiyama, Hiroshi Nakashima, Yuri Sano, Li Ling Chen, Shigeru Tanaka, Hiroyuki Miyauchi, Tsuneyuki Yamauchi, Haruhiko Sakurai, Kazuyuki Omae

研究成果: Article査読

11 被引用数 (Scopus)

抄録

The aim of this study was to clarify whether phenotypic variation exists when subjects with different genotypes of cytochrome P450 2E1 (CYP2E1) are exposed to N,N-dimethylformamide (DMF). The genotypes of CYP2E1 were confirmed in 123 healthy male volunteer subjects. Of the 123 subjects, the numbers of c1 homozygotes, c2 heterozygotes, and c2 homozygotes were 77, 45, and 1, respectively. Seven of the c1 homozygotes, five of the c2 heterozygotes, and the one c2 homozygote (mean age: 22.7 years, range: 20-27 years) were exposed to DMF vapor twice, once via the skin and once via the lung, for a total of 8 h per subject at a concentration below 10 ppm, the occupational exposure limit recommended by the Japan Society for Occupational Health, the American Conference of Governmental and Industrial Hygienists, and Deutsche Forschungsgemeinschaft, at 27°C and 44% relative humidity. Exposure levels were 6.2 ± 1.0 ppm in dermal exposure and 7.1 ± 1.0 ppm in inhalation exposure. Urine samples were collected until 72 h after exposure. The half-lives of urinary N-methylformamide (NMF) were obtained as the phenotype. The average urinary NMF half-lives of the c1 homozygotes, the c2 heterozygotes, and the c2 homozygote were 3.86 ± 1.90, 4.38 ± 1.53, and 4.2 h after dermal exposure, and 1.58 ± 0.42, 1.84 ± 0.61, and 3.2 h after respiratory exposure. The NMF half-lives of the c1 homozygotes were not significantly different from those of the c2 heterozygotes, and there were no differences between the NMF half-lives on the subjects with and without the c2 allele. Even though the data were obtained from only one c2 homozygote, it is noteworthy that the NMF half-life of this subject was slightly less than that of the c1 homozygotes after respiratory exposure.

本文言語English
ページ(範囲)755-759
ページ数5
ジャーナルArchives of Toxicology
74
12
DOI
出版ステータスPublished - 2001

ASJC Scopus subject areas

  • 毒物学
  • 健康、毒物学および変異誘発

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