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Figure 1 Schematic representation of a hepatocyte showing some of the transporters and receptors discussed in this review. BA, bile acid; NTCP, sodium taurocholate cotransporter polypeptide; MRP, multidrug resistance-associated protein; GSH, reduced glutathione; BSEP, bile salt export pump; MDR3, multidrug resistance protein 3; ABCG5/8, ABC heterodimeric transporter 5/8; FIC1, familial intrahepatic cholestasis 1 protein; FXR, farnesoid-X receptor. MRP3 and 4 are alternative export transporters that can transport bile acids back into the blood. Their role in intrahepatic cholestasis of pregnancy has not yet been examined in detail
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