Hepatic bile acid transporter (None standardized; individual hepatic bile acid transporters have abbreviations such as NTCP (Na⁺ taurocholate co-transporting polypeptide) and OATP (Organic anion transporting polypeptide))

Hepatic bile acid transporters encompass several classes of membrane proteins—including NTCP, OATPs, BSEP, and MRP2—located on basolateral and canalicular membranes of hepatocytes. They regulate the import and export of bile acids, maintaining the enterohepatic cycle and contributing to lipid and cholesterol homeostasis. Dysfunction or inhibition of these transporters can result in cholestatic liver disease, altered cholesterol metabolism, and disruption of fat-soluble vitamin absorption, making them key therapeutic targets in hepatology and metabolic medicine[1][2][3][4][5]. These transporters also play cytoprotective roles in extrahepatic tissues and are involved in hepatic responses to inflammation and infection. Drug development efforts are ongoing for targeting bile acid transporter activity in conditions such as constipation, irritable bowel syndrome, and cholestatic liver diseases[4][1].

Other names

Na⁺ taurocholate co-transporting polypeptide (NTCP, SLC10A1)Organic anion transporting polypeptide (OATP, family includes OATP1B1/SLC21A6 and OATP1B3/SLC21A8)Bile salt export pump (BSEP, ABCB11)Multidrug resistance-associated protein 2 (MRP2, ABCC2)

Inhibition of reabsorption (ASBT inhibitors); Modulation of bile acid export (targeting BSEP or MRP2); Alteration of bile acid pool to reduce cholesterol and control diseases linked to bile acid toxicity