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Related Experiment Videos

In vitro models for the blood-brain barrier.

P Garberg1, M Ball, N Borg

  • 1In vitro Sciences, Preclinical R&D, Biovitrum AB, Lindhagensgatan, SE-112 76 Stockholm, Sweden. per.garberg@biovitrum.com

Toxicology in Vitro : an International Journal Published in Association with BIBRA
|February 17, 2005
PubMed
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This study evaluated in vitro models for predicting blood-brain barrier (BBB) transport. While no single model perfectly predicted in vivo permeability, the MDCKmdr-1 cell line showed promise in distinguishing passive diffusion from efflux, aiding drug development.

Area of Science:

  • Pharmacology and Toxicology
  • Neuroscience
  • Biotechnology

Background:

  • Accurate prediction of blood-brain barrier (BBB) transport is crucial for developing central nervous system drugs.
  • Existing in vitro models often struggle to replicate the complex in vivo BBB environment.
  • Computational models have shown limited success in predicting BBB permeability.

Purpose of the Study:

  • To identify and evaluate continuous cell line models for predicting blood-brain barrier (BBB) transport.
  • To investigate the specificity and correlation of various in vitro models with in vivo BBB data.
  • To assess the ability of in vitro models to differentiate between various compound transport mechanisms.

Main Methods:

  • Evaluated primary brain endothelial cells (bovine, human) and immortalized cell lines (rat, mouse) against in vivo BBB data.

Related Experiment Videos

  • Utilized non-BBB cell lines (ECV/C6, MDCK, Caco-2) for comparative analysis.
  • Developed a computational prediction model using Molsurf descriptors and partial least squares projection to latent structures (PLS).

    • Main Results:

    • No overall linear correlation between in vivo and in vitro permeability was found across all models and compounds.
    • MDCKwt and bovine brain endothelial cells showed moderate correlation for passively transported compounds (r2=0.65-0.74).
    • The MDCKmdr-1 cell line demonstrated the best separation of passively distributed compounds from efflux substrates.

    Conclusions:

    • No single in vitro model accurately predicted all aspects of in vivo BBB transport.
    • The MDCKmdr-1 cell line shows potential for identifying efflux substrates, improving in vitro-in vivo correlation.
    • Development of combined in vitro testing strategies is likely necessary for reliable prediction of in vivo brain distribution.