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  • Title: Biliary excretion of taurocholate, organic anions and vinblastine in rats with alpha-naphthylisothiocyanate-induced cholestasis.
    Author: Kurihara H, Sano N, Takikawa H.
    Journal: J Gastroenterol Hepatol; 2005 Jul; 20(7):1069-74. PubMed ID: 15955216.
    Abstract:
    BACKGROUND AND AIMS: alpha-Naphthylisothiocyanate (ANIT) is known to cause cholestasis due to injury of the bile duct epithelial cells. The aim of the present study was to examine the effect of a single dose of ANIT on the biliary excretion of various cholephilic compounds and on the amount of canalicular transporters. METHODS: Twenty-four hours after the oral administration of ANIT (100 mg/kg), the biliary excretion of taurocholate, leukotriene C(4), pravastatin and vinblastine was studied. The protein levels of the bile salt export pump and multidrug resistance protein 2 and the immunostaining of multidrug resistance protein 2 in the liver were also examined. RESULTS: The ANIT treatment markedly decreased the biliary excretion of tracer amounts of taurocholate, leukotriene C(4), pravastatin and vinblastine. The biliary excretory maximum of taurocholate was also markedly decreased after ANIT treatment. The ANIT treatment had no effect on the protein levels of bile salt export pump and multidrug resistance protein 2 and the immunostaining of multidrug resistance protein 2 in the liver. CONCLUSIONS: These findings support canalicular transporters having little effect on the marked impairment of biliary excretion of cholephilic compounds in ANIT-induced cholestasis.
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