Evidence map›Paper›PMID 34594000›Full record

ReviewCellular & molecular immunology2021

The blood-brain barrier in systemic infection and inflammation.

Ian Galea

Open access · hybridAbstract readReview
In one paragraph

Review in Cellular & molecular immunology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 473 papers.

0numbers the graph read from it
0cells of the map it votes in
473citing papers in PubMed
30.7field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

473 citing papers in PubMed, 609 citations in OpenAlex.

  1. Gut microbes · 2026
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  10. Immune dysregulation and epileptogenesis.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2026
    Review
  11. Review
  12. The neuroimmune-glutamate hypothesis of addiction.Neuroscience and biobehavioral reviews · 2026
    Review
  13. Article
  14. Baseline peripheral inflammatory profiles predict phenoconversion in prodromal Parkinson's disease: a longitudinal cohort study.Clinical autonomic research : official journal of the Clinical Autonomic Research Society · 2026
    Article
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  16. Review
  17. Review
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  20. Article

413 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

1 author at 1 institution in 1 country.

Ian GaleaClinical Neurosciences, Clinical & Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, SO16 6YD, UK. i.galea@soton.ac.uk.ORCID http://orcid.org/0000-0002-1268-5102
University of Southampton · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The vascular blood-brain barrier is a highly regulated interface between the blood and brain. Its primary function is to protect central neurons while signaling the presence of systemic inflammation and infection to the brain to enable a protective sickness behavior response. With increasing degrees and duration of systemic inflammation, the vascular blood-brain barrier becomes more permeable to solutes, undergoes an increase in lymphocyte trafficking, and is infiltrated by innate immune cells; endothelial cell damage may occasionally occur. Perturbation of neuronal function results in the clinical features of encephalopathy. Here, the molecular and cellular anatomy of the vascular blood-brain barrier is reviewed, first in a healthy context and second in a systemic inflammatory context. Distinct from the molecular and cellular mediators of the blood-brain barrier's response to inflammation, several moderators influence the direction and magnitude at genetic, system, cellular and molecular levels. These include sex, genetic background, age, pre-existing brain pathology, systemic comorbidity, and gut dysbiosis. Further progress is required to define and measure mediators and moderators of the blood-brain barrier's response to systemic inflammation in order to explain the heterogeneity observed in animal and human studies.

Indexed as

AnimalsBlood-Brain BarrierBrain DiseasesDysbiosisGene-Environment InteractionHumansInfectionsInflammationNeuronsSignal Transductionblood–brain barrierinfectioninflammationmoderationsignaling

Identifiers

PMID34594000
PMCPMC8481764
OpenAlexW3202683854

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.