Bile Acid-binding Resins
Bile Acid-binding Resins - Related Videos
08:42
Using Multi-fluorinated Bile Acids and In Vivo Magnetic Resonance Imaging to Measure Bile Acid Transport
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Cited by 8 •
2016
Tools to diagnose bile acid malabsorption and measure bile acid transport in vivo are limited. An innovative approach in live animals is described that utilizes combined proton (1H) plus fluorine (19F) magnetic resonance imaging; this novel methodology has translational potential to screen for bile acid malabsorption in clinical practice.
09:21
Real Time Monitoring of Intracellular Bile Acid Dynamics Using a Genetically Encoded FRET-based Bile Acid Sensor
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Cited by 8 •
2016
We provide a detailed protocol to study bile acid dynamics in living cells using a genetically encoded BAS FRET sensor. This Bile Acid Sensor represents a unique tool to study (regulation of) bile acid transport and FXR activation in a wide range of cell types.
08:47
3-Dimensional Resin Casting and Imaging of Mouse Portal Vein or Intrahepatic Bile Duct System
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Cited by 20 •
2012
A method of visualizing and quantifying the 3-dimensional structure of mouse hepatic portal vein or intrahepatic bile duct is described. This resin cast technique can also be applied to other ductal or vascular systems and allows for in situ visualization or quantification of a system's intact communicating architecture.
04:32
Biliary System Resin Casting: A Technique for Analyzing 3D Architecture of Biliary System in Murine Model Using Radiopaque Resin Injection
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2025
This video describes the procedure for biliary system resin casting, for understanding 3D biliary architecture. This technique provides insights into the internal diameter and network connectivity of the biliary system, which could be used for liver regeneration analysis.
06:55
Ileectomy-induced Bile Overaccumulation in Mouse Intestine
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Cited by 4 •
2017
Small intestine-dependent bile acid reabsorption and feedback inhibition of hepatic bile acid synthesis is important for systemic homeostasis and health. In this study, we describe a mouse model for ileal resection to evaluate ileectomy-induced bile malabsorption, overaccumulation, and toxicity in mouse intestine.
FAQs
Blocking bile acid reabsorption produces a compensatory hepatic response. As more bile acids are lost through the intestine, the liver uses additional cholesterol to replace them and increases hepatic LDL-receptor activity. These linked responses explain how an intestinally confined drug can lower circulating bile acids and LDL cholesterol without requiring systemic absorption.
The resins’ anion-exchange behavior is pharmacologically important because binding occurs within the intestinal lumen rather than after drug uptake. Their binding capacity is not limited to bile acids: coadministered medicines and fat-soluble vitamins may also be retained, creating absorption-related interactions that must influence treatment planning.
The relevant outcome depends on which bile-acid-related problem is being targeted. Reducing circulating bile acids supports treatment of hypercholesterolemia, whereas removing bile acids from the intestinal pool can help with bile acid-induced diarrhea. In cholestasis, lowering the bile-acid burden may relieve pruritus, giving the therapy distinct pharmacologic applications.
Dosing must account for the possibility that the resin will bind other substances in the gut and reduce their absorption. Medicines taken at the same time may therefore not reach their intended exposure, and fat-soluble vitamin uptake may also decline. Careful dosing schedules help separate these substances from the resin during treatment.
Their applications extend to symptoms caused by excess or misplaced bile acids. In bile acid-induced diarrhea, intestinal binding can help reduce the relevant bile-acid burden. In cholestasis, the approach may relieve pruritus associated with bile acids. These uses show that the same intestinal mechanism can support both lipid management and symptom-focused therapy.
Bile acid-binding resins demonstrate how a local intestinal site of action can produce effects beyond the gut. Their binding activity influences hepatic cholesterol handling and circulating LDL, while also altering the absorption of coadministered medicines and fat-soluble vitamins. This combination connects pharmacodynamic effects with absorption-based treatment considerations and dosing strategy.