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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Concentrative nucleoside transporter (rCNT1) is targeted to the apical membrane through the hepatic transcytotic pathway.

The Na+-dependent nucleoside transporter CNT1 has been identified in a caveolin-enriched plasma membrane fraction (CEF), in transcytotic endosomes, and in canalicular membranes isolated from quiescent rat liver in which the transporter appears to be biologically active. CNT1 was also detected, albeit in small amounts, in the early/sorting endosomes. Plasma membrane preparations enriched in basolateral markers showed Na+-dependent nucleoside transport activity that is mostly, if not exclusively, accounted for by CNT2, a transporter protein which was not detected in CEF nor in the endosomal fractions. These data are consistent with different localization and trafficking pathways of the two isoforms in hepatocytes. CNT1 is the first transporter which is reported to follow the transcytotic pathway to be inserted on the apical side of liver parenchymal cells.[1]

References

  1. Concentrative nucleoside transporter (rCNT1) is targeted to the apical membrane through the hepatic transcytotic pathway. Duflot, S., Calvo, M., Casado, F.J., Enrich, C., Pastor-Anglada, M. Exp. Cell Res. (2002) [Pubmed]
 
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