Related Experiment Video

Updated: Mar 16, 2026

Methods to Study Epithelial Transport Protein Function and Expression in Native Intestine and Caco-2 Cells Grown in 3D
11:27

Methods to Study Epithelial Transport Protein Function and Expression in Native Intestine and Caco-2 Cells Grown in 3D

Published on: March 16, 2017

17.1K

Caco-2 cells - expression, regulation and function of drug transporters compared with human jejunal tissue

S Brück1, J Strohmeier1, D Busch1

  • 1Department of Clinical Pharmacology, Center of Drug Absorption and Transport, University Medicine, Greifswald, Germany.

Biopharmaceutics & Drug Disposition
|August 13, 2016
PubMed
Abstract

Insights

The Caco-2 cell line is not suitable for predicting drug-drug interactions caused by transporter induction. This study found significant differences in transporter expression compared to human jejunal tissue, rendering it unreliable for induction studies.

Area of Science:

  • Pharmacology
  • Drug Metabolism and Transport

Background:

  • Drug-drug interactions (DDIs) can arise from altered drug transporter activity.
  • Existing in vitro assays primarily assess transporter inhibition, not induction.
  • Investigating induction potential is crucial for comprehensive DDI evaluation.

Purpose of the Study:

  • To evaluate the Caco-2 cell line's suitability for predicting transporter-mediated DDIs caused by induction.
  • To compare drug transporter expression in Caco-2 cells with human jejunal tissue.
  • To assess the impact of culture time and known inducers on transporter expression and function.

Main Methods:

  • Gene and protein expression analysis using TaqMan® low density arrays and LC-MS/MS.
  • Functional assays of ABCB1 (P-glycoprotein) using radiolabeled substrates (digoxin, talinolol).
  • Incubation with prototypical inducers: rifampicin, St John's wort, carbamazepine, and efavirenz.

Main Results:

  • Significant differences observed in drug transporter expression between Caco-2 cells and jejunal tissue.
  • Culture time influenced mRNA and protein levels of some transporters.
  • Prototypical inducers did not alter ABCB1 mRNA, protein abundance, or function in Caco-2 cells.

Conclusions:

  • Caco-2 cell transporter expression varies with culture time and differs from human jejunal tissue.
  • These discrepancies necessitate careful consideration to avoid misinterpreting in vitro DDI data.
  • The Caco-2 cell model is unsuitable for evaluating drug-drug interactions stemming from transporter induction.
Keywords:
Caco-2 cell modeldrug transportersjejunal tissue

More Related Videos

Using Caco-2 Cells to Study Lipid Transport by the Intestine07:00

Using Caco-2 Cells to Study Lipid Transport by the Intestine

Published on: August 20, 2015

20.0K
Sensing of Barrier Tissue Disruption with an Organic Electrochemical Transistor11:17

Sensing of Barrier Tissue Disruption with an Organic Electrochemical Transistor

Published on: February 10, 2014

12.3K

Related Concept Videos

Carrier-Mediated Transport01:06

Carrier-Mediated Transport

Carrier-mediated transport is a pivotal process in drug absorption, particularly for lipid-insoluble drugs, and encompasses facilitated diffusion and active transport. Facilitated diffusion allows drugs to move along their concentration gradient without energy expenditure, while active transport utilizes ATP to drive drug movement against this gradient.
Active transport involves two types of membrane-spanning transporters: uptake and efflux. Uptake transporters are expressed in the small...
1.5K
Methods for Studying Drug Absorption: In vitro01:16

Methods for Studying Drug Absorption: In vitro

In vitro experiments are crucial for understanding the transport and absorption of drugs through biological materials. These studies employ varied methods such as the diffusion cell method, the everted sac technique, and the everted ring technique.
The diffusion cell method uses a two-compartment cell, including a donor compartment with the drug solution, which simulates the environment where the drug is applied, and a receptor compartment with a buffer solution, which simulates the environment...
726
Cellular Membranes and Drug Transport01:24

Cellular Membranes and Drug Transport

Drugs must traverse multiple biological barriers, such as multi-layered skin, single-layered intestinal epithelium, and the plasma membrane, to reach their target sites within the body. The plasma membrane, a highly structured composite of phospholipids, carbohydrates, and proteins, is the cell's protective boundary, facilitating selective substance exchange.
Phospholipids arrange themselves into a bilayer, with hydrophilic heads oriented outward and hydrophobic tails facing inward.
2.0K
The Significance of Membrane Transport01:44

The Significance of Membrane Transport

The transport of solutes across the cell membrane is essential for metabolic processes, like maintaining cell size and volume, generating the action potential, exchanging nutrients and gases, etc. Membrane transport can be either passive or active. It can be simple diffusion, facilitated, or mediated transport aided by transport proteins such as transporters and channels.
Transporters facilitate either an active or passive movement of solutes. They can allow a single-molecule transport down its...
43.8K
Mechanisms of Drug Absorption: Paracellular, Transcellular, and Vesicular Transport01:23

Mechanisms of Drug Absorption: Paracellular, Transcellular, and Vesicular Transport

Drugs need to permeate cell membranes to reach their target sites after administration. Orally administered drugs must transcend intestinal epithelial membrane barriers to infiltrate the systemic circulation. Drugs with a molecular weight of less than 500 Daltons diffuse through gaps between neighboring cells, called paracellular pathways.
However, most drugs use the transcellular route, traversing directly through the cell membranes via two mechanisms: passive and active transport. Passive...
2.3K
Pharmacogenetics of Drug Transporters: P-Glycoprotein and Solute Carrier Transporters01:16

Pharmacogenetics of Drug Transporters: P-Glycoprotein and Solute Carrier Transporters

The pharmacogenetics of drug transporters is increasingly recognized as a critical factor influencing interindividual variability in drug absorption, distribution, and elimination. These membrane-bound proteins regulate drugs' movement across cellular barriers by actively pumping them out (efflux) or facilitating their uptake (influx). Among the major transporter families, ATP-binding cassette (ABC) and solute carrier (SLC) transporters play particularly prominent roles. Genetic polymorphisms...
95