Cited by 2,798Barrier Structure and Function StudiesDrug Transport and Resistance MechanismsNanoparticle-Based Drug Delivery

The blood-brain barrier: Bottleneck in brain drug development

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Pardridge, William M.·2005·NeuroRX

Abstract

The blood-brain barrier (BBB) is formed by the brain capillary endothelium and excludes from the brain approximately 100% of large-molecule neurotherapeutics and more than 98% of all small-molecule drugs. Despite the importance of the BBB to the neurotherapeutics mission, the BBB receives insufficient attention in either academic neuroscience or industry programs. The combination of so little effort in developing solutions to the BBB problem, and the minimal BBB transport of the majority of all potential CNS drugs, leads predictably to the present situation in neurotherapeutics, which is that there are few effective treatments for the majority of CNS disorders. This situation can be reversed by an accelerated effort to develop a knowledge base in the fundamental transport properties of the BBB, and the molecular and cellular biology of the brain capillary endothelium. This provides the platform for CNS drug delivery programs, which should be developed in parallel with traditional CNS drug discovery efforts in the molecular neurosciences.

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Research works printed but not linked: 2

  1. Pardridge WM. Brain drug targeting: the future of brain drug development. Cambridge, UK: Cambridge University Press, 2001.
  2. Smith QR, Stoll J. Blood-brain barrier amino acid transport. Intro- duction to the blood-brain barrier: methodology and pathology. Cambridge, UK: Cambridge University Press, 1998.

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Authors
Pardridge, W. M.
Affiliations
University of California, Los Angeles (US)
Corresponding author
Pardridge, William M.
Venue
NeuroRX
Published
2005-01
Volume
2
Issue
1
Pages
3-14
ISSN
1545-5343 (ISSN-L)
OpenAlex
W2101099825
Cited by
2,798
References
4
Citations by year
2026: 222 · 2025: 237 · 2024: 199 · 2023: 222 · 2022: 233 · 2021: 188 · 2020: 211 · 2019: 174 · 2018: 173 · 2017: 149 · 2016: 138 · 2015: 119 · 2014: 94 · 2013: 88 · 2012: 81
FWCI
2.18
Type
journal article
Language
en
Open access
Locations
  • NeuroRx (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute of Neurological Disorders and Stroke (NS 34698, R01NS034698)
Topics
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
  • Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
  • Physical Sciences › Materials Science › Biomaterials › Nanoparticle-Based Drug Delivery
Keywords
blood-brain barrier, brain capillary endothelium, brain drug delivery, neurotherapeutics, large molecule drugs, small molecule drugs, CNS drug discovery
MeSH terms
Administration, Intranasal, Animals, Blood-Brain Barrier, Carrier Proteins, Central Nervous System Agents, Humans, Hydrogen Bonding, Molecular Weight, Drug Design, Drug Delivery Systems

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