Assessment of Passive Intestinal Permeability Using an Artificial Membrane Insert System

Area of Science:

• Pharmacokinetics
• Drug Delivery
• Biophysical Chemistry

Background:

• Current drug absorption models (cell-based and cell-free) have limitations including high costs and lengthy preparation.
• A simpler artificial membrane substitute could overcome these hurdles for assessing intestinal permeability.

Purpose of the Study:

• To evaluate an artificial membrane insert system (AMI-system) as a cost-effective alternative for predicting intestinal drug permeability.
• To compare the AMI-system's predictive capacity against the established Caco-2 cell model.
• To assess the suitability of fasted state simulated/human intestinal fluids (FaSSIF) as a surrogate medium for human intestinal fluid (FaHIF) using the AMI-system.

Main Methods:

• An artificial membrane insert system (AMI-system) with a regenerated cellulose membrane was used.
• Fourteen poorly water-soluble drugs were tested in both the AMI-system and Caco-2 system using FaSSIF and FaHIF media.
• Drug permeability was assessed and correlated between the two systems and media.

Main Results:

• A strong correlation (r=0.95) was observed between the AMI-system and Caco-2 system for drug permeability in FaHIF.
• The AMI-system demonstrated excellent predictive capacity for FaSSIF as a surrogate for FaHIF (r=0.96).
• The AMI-system showed reasonable correlation for drugs covering a broad range of physicochemical parameters.

Conclusions:

• The AMI-system is a time- and cost-effective tool for early-stage estimation of passive intestinal permeability.
• It serves as a viable alternative to traditional cell-based models for poorly water-soluble drugs.
• FaSSIF can be effectively used with the AMI-system as a surrogate for FaHIF in permeability studies.