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Related Experiment Videos

Transporter-mediated permeation of drugs across the blood-brain barrier.

I Tamai1, A Tsuji

  • 1Faculty of Pharmaceutical Sciences, Kanazawa University, Takara-machi, Kanazawa 920-0934, Japan.

Journal of Pharmaceutical Sciences
|October 4, 2000
PubMed
Summary

The blood-brain barrier (BBB) controls brain drug entry via specific transporters. Understanding these influx and efflux transporters is key to optimizing drug delivery and reducing side effects.

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Area of Science:

  • Neuroscience
  • Pharmacology
  • Cell Biology

Background:

  • The blood-brain barrier (BBB) restricts compound entry into the brain.
  • Hydrophilic compounds require specific transport mechanisms to cross the BBB.
  • Brain capillary endothelial cells form the BBB, lacking pores and fenestrations.

Purpose of the Study:

  • To review molecularly identified transporters involved in drug transfer across the BBB.
  • To discuss the role of influx and efflux transporters in drug distribution.
  • To provide a basis for controlling drug delivery to the brain.

Main Methods:

  • Literature review of molecularly identified BBB transporters.
  • Analysis of transporter functions in drug transport.
  • Discussion of molecular and physiological approaches.

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Main Results:

  • Identified influx transporters for amino acids, monocarboxylic acids, organic cations, hexoses, nucleosides, and peptides.
  • Demonstrated efflux transporters (e.g., P-glycoprotein, MRPs) limit drug entry into the brain.
  • Highlighted the impact of efflux transporters on CNS drug efficacy and side effects.

Conclusions:

  • Molecular identification of BBB transporters is crucial for understanding drug distribution.
  • Targeting influx and efflux transporters can optimize drug delivery to the central nervous system.
  • Further research into BBB transport mechanisms will enable rational drug design.