Tauroursodeoxycholic acid inserts the bile salt export pump into canalicular membranes of cholestatic rat liver

The role of bile salt export pump gene repression in drug-induced cholestatic liver toxicity.

The bile salt export pump (BSEP, ABCB11) is predominantly responsible for the efflux of bile salts, and disruption of BSEP function is often associated with altered hepatic homeostasis of bile acids and cholestatic liver injury. Accumulating evidence suggests that many drugs can cause cholestasis through interaction with hepatic transporters. To date, a relatively strong association between dru...

Activity of the bile salt export pump (ABCB11) is critically dependent on canalicular membrane cholesterol content.

Mutations in ATP8B1 cause severe inherited liver disease. The disease is characterized by impaired biliary bile salt excretion (cholestasis), but the mechanism whereby impaired ATP8B1 function results in cholestasis is poorly understood. ATP8B1 is a type 4 P-type ATPase and is a flippase for phosphatidylserine. Atp8b1-deficient mice display a dramatic increase in the biliary extraction of chole...

In vitro inhibition of the bile salt export pump correlates with risk of cholestatic drug-induced liver injury in humans.

Inhibition of the activity of the human bile salt export pump (BSEP: ABCB11) has been proposed to play a role in drug-induced liver injury (DILI). To enhance understanding of the relationship between BSEP inhibition and DILI, inhibition of human BSEP (hBSEP) and its rat ortholog (rBsep) by 85 pharmaceuticals was investigated in vitro. This was explored using assays that quantified inhibition of...

Short Communication: The role of bile salt export pump (BSEP) gene repression in drug-induced cholestatic liver toxicity

Development of an adverse outcome pathway from drug-mediated bile salt export pump inhibition to cholestatic liver injury.

Adverse outcome pathways (AOPs) have been recently introduced in human risk assessment as pragmatic tools with multiple applications. As such, AOPs intend to provide a clear-cut mechanistic representation of pertinent toxicological effects. AOPs are typically composed of a molecular initiating event, a series of intermediate steps and key events, and an adverse outcome. In this study, an AOP fr...