Permeability assessment for solid oral drug formulations based on Caco-2 monolayer in combination with a flow through...

Area of Science:

• Pharmacokinetics and Drug Delivery
• Biopharmaceutical Science
• In Vitro Assays

Background:

• Accurate prediction of in vivo drug performance from in vitro data is crucial for drug development.
• Current methods for assessing drug permeation and dissolution are often separate, limiting comprehensive analysis.
• Caco-2 cell monolayers are a widely accepted model for predicting intestinal drug absorption.

Purpose of the Study:

• To develop and validate an integrated apparatus for simultaneous in vitro dissolution and permeation assessment.
• To evaluate the apparatus's ability to forecast the in vivo performance of oral solid dosage forms.
• To establish a reproducible method for assessing drug permeation through Caco-2 monolayers.

Main Methods:

• Connecting flow-through dissolution modules with a custom-designed permeation cell using a stream splitter.
• Utilizing Apparatus 4 (USP) for dissolution testing and a specialized cell for permeation through Caco-2 monolayers.
• Producing and evaluating propranolol hydrochloride tablets with varying strengths and release profiles to test the apparatus.

Main Results:

• The apparatus demonstrated high precision and reproducibility in simultaneously measuring dissolution and permeation.
• A linear relationship was observed between dosage strength and the permeated amount for immediate-release tablets.
• The system successfully detected the impact of extended-release formulations on drug permeation.

Conclusions:

• The integrated apparatus provides a promising tool for predicting in vivo drug performance by combining dissolution and Caco-2 permeability.
• This novel system facilitates the study of how dosage form characteristics influence drug permeation.
• The developed method lays the foundation for advanced research into drug delivery and absorption.