高毒性植物成分によるCYP2B P450の誘導―動物―植物闘争とCYP2BP450の進化―

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タイトル別名
  • INDUCTION OF CYP2B SUBFAMILY P450 BY HIGHLY TOXIC INGREDIENTS IN PLANTS —ANIMAL-PLANT WARFARE AND THE EVOLUTION OF THE CYP2B P450—

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The inducing activities of picrotoxin and strychnine were studied in rats. Inducibility was estimated by measuring P450 content, metabolizing activities toward benzphetamine, aniline, benzo[a]pyrene and testosterone, and by immunoblot analysis using anti-CYP2B1 antibody. Picrotoxin and the components, picrotoxinin and picrotin, equally induced hepatic CYP2B1 and 2B2. The magnitude of the induction was comparable to phenobarbital-induction. Strychnine and the analogue, brucine, with low toxicity also induced CYP2B1/2, although the extent was less than that of PB. Interestingly, these alkaloids induced CYP2B3 as well as CYP2B1/2. Based on these findings together with a recent concept, Animal-Plant Warfare, the evolution of CYP2B subfamily P450 is discussed.

収録刊行物

  • 薬物動態

    薬物動態 9 (supplement), 160-163, 1994

    日本薬物動態学会

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