When mice can’t send bile acids out of their gut cells, the bile acids pile up inside the cells, tricking the body into thinking there’s too much bile acid overall — so the liver stops making more, even though the total amount in the body actually goes down.
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design supports claim
Appropriate Language Strength
definitive
Can make definitive causal claims
Assessment Explanation
The study uses genetic knockout with direct measurements of intracellular bile acids, FGF15, and Cyp7a1 expression, providing definitive mechanistic evidence within the mouse model.
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.
Evidence from Studies
Supporting (1)
Deletion of the ileal basolateral bile acid transporter identifies the cellular sentinels that regulate the bile acid pool
When mice lose a specific transporter in their gut that moves bile acids out of intestinal cells, bile builds up inside those cells but drops in the body, which tells the liver to make less bile — proving that this transporter is needed to signal the liver to slow down bile production.