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Molecular Regulation of Canalicular ABC Transporters

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Ben Saad, Amel | Bruneau, Alix | Mareux, Elodie | Lapalus, Martine | Delaunay, Jean-Louis | Gonzales, Emmanuel | Jacquemin, Emmanuel | Aït-Slimane, Tounsia | Falguières, Thomas

Edité par CCSD ; MDPI -

International audience. The ATP-binding cassette (ABC) transporters expressed at the canalicular membrane of hepatocytes mediate the secretion of several compounds into the bile canaliculi and therefore play a key role in bile secretion. Among these transporters, ABCB11 secretes bile acids, ABCB4 translocates phosphatidylcholine and ABCG5/G8 is responsible for cholesterol secretion, while ABCB1 and ABCC2 transport a variety of drugs and other compounds. The dysfunction of these transporters leads to severe, rare, evolutionary biliary diseases. The development of new therapies for patients with these diseases requires a deep understanding of the biology of these transporters. In this review, we report the current knowledge regarding the regulation of canalicular ABC transporters' folding, trafficking, membrane stability and function, and we highlight the role of molecular partners in these regulating mechanisms.

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