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- W2079262433 abstract "The present study characterized a primary culture model of hepatocytes isolated from the little skate, Leucoraja erinacea, that maintain remarkable structural and functional polarity over 7 days in culture. Skate hepatocytes were isolated as clusters of 3-20 hepatocytes surrounding a bile canaliculus, rather than as single cells. Trypan blue and propidium iodide exclusion was found to be >98%, and the cells maintained high intracellular concentrations of K+, ATP, and reduced glutathione (GSH), and high ratios of ATP/ADP and GSH/GSSG. Glutathione S-transferase activity remained constant, whereas cytochrome P450 activity declined to 16% of initial levels after 7 days. Quantitative RT-PCR analysis revealed that the mRNA levels of several genes remained constant over the 7-day period, whereas Bsep, the canalicular bile salt export pump, levels declined slowly to 30% of initial values. In the presence of dexamethasone, the cells underwent a morphogenesis in which the clusters reannealed into a three-dimensional network of chords. During this morphogenesis, skate hepatocytes clusters maintained a polarized distribution of actin filaments and microtubules, as well as apical and basolateral membrane domains. Polarity of membrane transport systems was confirmed both morphologically, using antibodies raised against Bsep and Mrp2, the canalicular multispecific organic anion transporter, and functionally, by monitoring secretion of the fluorescent organic anions NBD-taurocholate, a Bsep substrate, and fluorescein-methotrexate, an Mrp2 substrate, into the bile canalicular spaces. Overall, the results indicate that in contrast with mammalian hepatocytes, isolated skate hepatocyte clusters retain polarity in culture, and provide an excellent system for investigating long-term effects of drugs and xenobiotics on hepatobiliary functions, and for studying in vitro morphogenesis." @default.
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- W2079262433 date "2006-06-01" @default.
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- W2079262433 title "Retention of structural and functional polarity in cultured skate hepatocytes undergoing in vitro morphogenesis" @default.
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- W2079262433 doi "https://doi.org/10.1016/j.cbpb.2006.02.005" @default.
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