Effect of phenobarbital on the expression of bile salt and organic anion transporters of rat liver.
BACKGROUND/AIMS: The hepatic clearance of drugs and cholephilic organic anions is stimulated by phenobarbital (PB). Our aim was to analyze the effects of PB on the expression of hepatocellular bile salt and organic anion transporters. METHODS: Male Sprague-Dawley rats were treated intraperitoneally with PB (80 mg/kg/d) or saline for 5 days. Transporter expression was quantified by northern and western blot analysis and initial uptake rates of bromosulphophthalein (BSP) and digoxin were measured in isolated hepatocytes. RESULTS: Compared to control rats, PB treatment increased expression of t
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