The in-vivo effects of sho-saiko-to, a traditional Chinese herbal medicine, on two cytochrome P450 enzymes (1A2 and 3A) and xanthine oxidase in man

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  • Junji Saruwatari
    Division of Clinical Pharmacology, Graduate School of Pharmaceutical Sciences, Faculty of Medical and Pharmaceutical Sciences, Kumamoto University , Oe-honmachi 5–1, Kumamoto 862–0973,
  • Kazuko Nakagawa
    Division of Clinical Pharmacology, Graduate School of Pharmaceutical Sciences, Faculty of Medical and Pharmaceutical Sciences, Kumamoto University , Oe-honmachi 5–1, Kumamoto 862–0973,
  • Junichi Shindo
    Division of Clinical Pharmacology, Graduate School of Pharmaceutical Sciences, Faculty of Medical and Pharmaceutical Sciences, Kumamoto University , Oe-honmachi 5–1, Kumamoto 862–0973,
  • Shinobu Nachi
    Department of Pharmacotherapy, Meiji Pharmaceutical University , 2–522–1 Noshio, Kiyose, Tokyo 204–8588,
  • Hirotoshi Echizen
    Department of Pharmacotherapy, Meiji Pharmaceutical University , 2–522–1 Noshio, Kiyose, Tokyo 204–8588,
  • Takashi Ishizaki
    Division of Clinical Pharmacology, Graduate School of Pharmaceutical Sciences, Faculty of Medical and Pharmaceutical Sciences, Kumamoto University , Oe-honmachi 5–1, Kumamoto 862–0973,

書誌事項

公開日
2003-11-01
権利情報
  • https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model
DOI
  • 10.1211/0022357022061
公開者
Oxford University Press (OUP)

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<jats:title>Abstract</jats:title> <jats:p>The Chinese herbal medicine sho-saiko-to is a mixture of seven herbal components (Bupleurum root, Pinellia tuber, Scutellaria root, Jujube fruit, Ginseng root, Glycyrrhiza root and Ginger rhizome) that is widely administered to patients with chronic hepatitis in Japan. We assessed the effects of sho-saiko-to on the activity of cytochrome P450 (CYP) 1A2, CYP3A and xanthine oxidase (XO) in man. Twenty-six healthy subjects were studied to evaluate their baseline activity of CYP1A2 and XO by the respective urinary metabolic ratios of an 8-h urine sample after an oral 150-mg dose of caffeine and of CYP3A by a urinary excretion ratio of 6β-hydroxycortisol (6β-HC) to free cortisol (FC). Thereafter, the subjects received a twice-daily 2.5-g dose of sho-saiko-to for five days, and underwent the caffeine test on day 1 and day 5. The mean activity of CYP1A2 decreased by 16% on both day 1 and day 5 compared with the baseline (P = 0.001). The mean activity of XO also significantly decreased by 25% on day 1 and 20% on day 5 (P &lt; 0.0001) compared with the baseline value. The activity of CYP3A tended to be lower on day 5 than the baseline (P = 0.146). It is concluded that sho-saiko-to reduces CYP1A2 and XO activity in man.</jats:p>

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