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Related Concept Videos

Methods for Studying Drug Absorption: In vitro01:16

Methods for Studying Drug Absorption: In vitro

562
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...
562
Methods for Studying Drug Absorption: In situ01:09

Methods for Studying Drug Absorption: In situ

617
In situ experiments, such as the Doluisio method and Single-Pass Perfusion technique, provide critical insights into drug uptake by simulating in vivo conditions for drug absorption.
The Doluisio method involves perfusing a prepared segment of a rat's small intestine with a solution of radiolabeled drug and a non-absorbable marker. This helps to differentiate between absorbed and non-absorbed drug concentrations. The intestinal segment is connected at both ends using tubing and syringes,...
617

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Related Experiment Video

Updated: Jan 11, 2026

Ex Vivo Intestinal Sacs to Assess Mucosal Permeability in Models of Gastrointestinal Disease
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In Vitro and Ex Vivo Models to Study Molecular Trafficking Across the Human Intestinal Barrier.

Andrea Galvan1, Elsa Guidorizzi1, Flavia Carton2,3

  • 1Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, 37134 Verona, Italy.

International Journal of Molecular Sciences
|November 13, 2025
PubMed
Summary

Developing in vitro intestinal models aids drug development by simulating the human gut barrier. These models are crucial for evaluating drug absorption, distribution, metabolism, and excretion (ADME) in preclinical research.

Keywords:
3D bioprintingartificial membranecell cultureintestinal absorptionintestine explantintestine modelorgan-on-a-chip

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Area of Science:

  • Pharmacology
  • Biotechnology
  • Drug Delivery Systems

Background:

  • The intestine is vital for digestion and nutrient absorption, making it a key target for pharmaceutical research and drug delivery.
  • Preclinical evaluation of drug absorption, distribution, metabolism, and excretion (ADME) necessitates reliable in vitro models of the intestinal barrier.

Purpose of the Study:

  • To review and discuss various in vitro intestinal models developed for drug development.
  • To highlight the advantages and disadvantages of different models in mimicking the human intestinal barrier.

Main Methods:

  • Artificial membranes for passive absorption studies.
  • 2D/3D cell cultures for transcellular pathway analysis.
  • Organs-on-a-chip for mimicking in vivo complexity.
  • Intestine explants for replicating native organ conditions.

Main Results:

  • Each model (artificial membranes, cell cultures, organs-on-a-chip, explants) offers unique insights into drug-intestinal barrier interactions.
  • Models are tailored to specific research needs, from passive diffusion to complex mechanical interactions.
  • Intestine explants provide the most comprehensive in vitro representation of the native organ.

Conclusions:

  • Diverse in vitro intestinal models have significantly advanced our understanding of how drugs, toxins, and xenobiotics interact with the intestinal barrier.
  • These models are indispensable tools for preclinical drug formulation assessment.
  • Continued development of in vitro models promises further improvements in predicting in vivo drug behavior.