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Related Experiment Videos

In vitro cell models to study nasal mucosal permeability and metabolism.

Merkle1, Ditzinger, Lang

  • 1Swiss Federal Institute of Technology Zurich (ETH), Department of Pharmacy, Irchel Campus, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland

Advanced Drug Delivery Reviews
|June 6, 2000
PubMed
Summary

In vitro nasal models offer controlled environments for studying drug absorption and metabolism. Excised animal nasal tissues best mimic in vivo conditions, though human cell cultures require further development.

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Area of Science:

  • Pharmacology
  • Drug Delivery
  • Biotechnology

Background:

  • In vivo studies are crucial for nasal drug delivery but offer limited mechanistic insights.
  • In vitro models provide controlled environments to study nasal drug absorption and metabolism.

Purpose of the Study:

  • To review and discuss the progress, potential, and limitations of nasal in vitro models.
  • To summarize experimental setups for in vitro transport and metabolism studies.
  • To identify endocytotic uptake mechanisms in nasal epithelium.

Main Methods:

  • Review of primary human nasal cell cultures, human nasal cell lines (RPMI 2650), and excised nasal epithelium (various animal species and human).
  • Discussion of preparation techniques, tissue characterization, culture conditions, and viability/integrity testing.

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  • Overview of experimental setups for in vitro transport (permeation, pathways, enhancers) and metabolism studies (rates, saturation, enzymatic cleavage).

    • Main Results:

    • Excised animal nasal tissues currently best mimic in vivo nasal barrier function ex vivo.
    • Primary human cell and cell line cultures show promise but require further evaluation and improvement.
    • Various experimental setups allow detailed investigation of drug permeation, metabolism, and toxicity in vitro.

    Conclusions:

    • In vitro models are valuable for mechanistic studies of nasal drug absorption and metabolism.
    • Further research is needed to optimize human primary cell and cell line models for physiological relevance.
    • Excised animal tissues remain a strong ex vivo model, but human tissue availability is a limitation.