Cited by 2,452Barrier Structure and Function StudiesDrug Transport and Resistance MechanismsCerebrospinal fluid and hydrocephalus

Development, maintenance and disruption of the blood-brain barrier

Open access
Obermeier, Birgit, Daneman, Richard, Ransohoff, Richard M·2013·Nature Medicine

Abstract

The interface between the blood circulation and the neural tissue features unique characteristics that are encompassed by the term 'blood-brain barrier' (BBB). The main functions of this barrier, namely maintenance of brain homeostasis, regulation of influx and efflux transport, and protection from harm, are determined by its specialized multicellular structure. Every constituent cell type makes an indispensable contribution to the BBB's integrity. But if one member of the BBB fails, and as a result the barrier breaks down, there can be dramatic consequences and neuroinflammation and neurodegeneration can occur. In this Review, we highlight recently gained mechanistic insights into the development and maintenance of the BBB. We then discuss how BBB disruption can cause or contribute to neurological disease. Finally, we examine how this knowledge can be used to explore new possibilities for BBB repair.

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Crossref · 10.1038/nm.3407

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  • The breakdown of the BBB is mainly due to the disruption of TJs, such as claudin-5.

    “The breakdown of the BBB is mainly due to the disruption of TJs, such as claudin-5 [42, 43].”

    From Chronic stress-induced depression requires the recruitment of peripheral Th17 cells into the brain (2022) · cites this paper as [43]

    The “Links between the BBB and disease” section says BBB breakdown can involve disrupted tight junctions, and its ischemic-stroke subsection associates reduced claudin-5 expression with increased BBB permeability. But the review also identifies impaired transport processes and says the mechanisms of breakdown are manifold; it does not establish that tight-junction disruption is the main cause. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • The blood-brain barrier prevents the transfer of most small-molecule drugs and macromolecules into the brain.

    “it prevents the transfer of most of small-molecule drugs and macromolecules (e.g., peptides, gene drugs, and protein drugs) into the brain (1–6).”

    From Neurotransmitter-derived lipidoids (NT-lipidoids) for enhanced brain delivery through intravenous injection (2020) · cites this paper as [4]

    The Introduction says the BBB’s tight junctions and low transcytosis greatly limit movement of molecules into the brain. It does not specifically establish that most small-molecule drugs or macromolecular drugs, including the examples in the citing sentence, are prevented from entering. (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • Together with microglia, astrocytes constitute the principal defensive system of the CNS and respond to damage-related stimuli including Aβ and glutamate overload in a process known as astrocyte reactivity.

    “Together with microglia, astrocytes constitute the principal defensive system of the CNS [37], responding to numerous damage‐related stimuli [6, 7, 8, 9] including amyloid β peptides (Aβ) and glutamate overload, in a process known as astrocyte reactivity [15, 37, 38, 39, 40].”

    From Gliovascular alterations in sporadic and familial Alzheimer's disease: <scp><i>APOE3</i></scp> Christchurch homozygote glioprotection (2023) · cites this paper as [7]

    The section ‘The role of astrocytes in BBB regulation’ says astrocytes control immune reactions, and ‘BBB compromise in chronic neurodegeneration: ALS’ reports that microglia and astrocytes become activated after tissue injury. These passages support a defensive role and an activation response, but do not call the two cell types the CNS’s principal defensive system or identify the response as ‘astrocyte reactivity.’ The cited paper also does not substantiate Aβ or glutamate overload as triggers in this account. (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • Astrocyte reactivity has frequently been associated with neuroinflammation, unfavorable glial scar formation, glutamate dyshomeostasis, altered coverage of synapses and blood vessels, and BBB breakout.

    “Hence, astrocyte reactivity has frequently been associated with neuroinflammation, unfavorable glial scar formation [7, 8, 9, 37, 38, 43, 48, 49], glutamate dyshomeostasis [43, 50, 51], altered coverage of synapses and blood vessels, and BBB breakout [38, 42, 43, 45, 46, 47].”

    From Gliovascular alterations in sporadic and familial Alzheimer's disease: <scp><i>APOE3</i></scp> Christchurch homozygote glioprotection (2023) · cites this paper as [7]

    The sections on epilepsy and ALS link astrocytic inflammatory activity with increased BBB permeability and describe reduced astrocyte glutamate transport and swollen perivascular end-feet. They do not establish the full claimed association of astrocyte reactivity with unfavorable glial scars or altered synaptic coverage, and the BBB findings are presented in specific disease contexts rather than as a general consequence of reactivity. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • Treatment with glucocorticoids offers blood-brain barrier protection.

    “Treatment with glucocorticoids also offers BBB protection (446).”

    From Blood-Brain Barrier: From Physiology to Disease and Back (2019) · cites this paper as [446]

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Authors
Obermeier, B., Daneman, R., & Ransohoff, R. M.
Affiliations
  • Cleveland Clinic (US)
  • University of California, San Francisco (US)
Corresponding author
Ransohoff, Richard M
Venue
Nature Medicine
Published
2013-12
Volume
19
Issue
12
Pages
1584-1596
ISSN
  • 1078-8956 (ISSN-L)
  • 1546-170X
OpenAlex
W1995037165
Cited by
2,452
References
180
Citations by year
2026: 168 · 2025: 256 · 2024: 264 · 2023: 254 · 2022: 271 · 2021: 251 · 2020: 224 · 2019: 181 · 2018: 172 · 2017: 159 · 2016: 108 · 2015: 91 · 2014: 52
FWCI
8.07
Type
journal article
Language
en
Open access
Locations
  • Nature Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Neurological Disorders and Stroke (R21NS074820, K24NS051400)
Topics
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
  • Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Cerebrospinal fluid and hydrocephalus
Keywords
blood-brain barrier, blood-brain barrier disruption, brain homeostasis, BBB repair, neuroinflammation, neurodegeneration, blood-brain barrier permeability, neurological disorders
MeSH terms
Animals, Blood Vessels, Blood-Brain Barrier, Brain, Humans, Nervous System Diseases, Neovascularization, Physiologic, Vascular Endothelial Growth Factor A, Wnt Signaling Pathway

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