Evidence map›Paper›PMID 29030613›Full record

ArticleScientific reports2017

Lipopolysaccharide enters the rat brain by a lipoprotein-mediated transport mechanism in physiological conditions.

Alejandra Vargas-Caraveo, Aline Sayd, Sandra R Maus, Javier R Caso, José L M Madrigal, Borja García-Bueno, Juan C Leza

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 111 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
111citing papers in PubMed, 1 pooled it
4.9field-weighted citation impact, top 4% 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

111 citing papers in PubMed, 1 synthesis or guideline pooled it, 169 citations in OpenAlex.

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51 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

7 authors at 1 institution in 1 country.

Alejandra Vargas-CaraveoDepartment of Pharmacology, Faculty of Medicine, Hospital 12 de Octubre Imas12, IUINQ, University Complutense, Madrid, 28040, Spain. alejvarg@ucm.es.
Aline SaydDepartment of Pharmacology, Faculty of Medicine, Hospital 12 de Octubre Imas12, IUINQ, University Complutense, Madrid, 28040, Spain.
Sandra R MausDepartment of Pharmacology, Faculty of Medicine, Hospital 12 de Octubre Imas12, IUINQ, University Complutense, Madrid, 28040, Spain.
Javier R CasoDepartment of Pharmacology, Faculty of Medicine, Hospital 12 de Octubre Imas12, IUINQ, University Complutense, Madrid, 28040, Spain.
José L M MadrigalDepartment of Pharmacology, Faculty of Medicine, Hospital 12 de Octubre Imas12, IUINQ, University Complutense, Madrid, 28040, Spain.
Borja García-BuenoDepartment of Pharmacology, Faculty of Medicine, Hospital 12 de Octubre Imas12, IUINQ, University Complutense, Madrid, 28040, Spain.
Juan C LezaDepartment of Pharmacology, Faculty of Medicine, Hospital 12 de Octubre Imas12, IUINQ, University Complutense, Madrid, 28040, Spain.
Centro de Investigación Biomédica en Red de Salud Mental · ES

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Physiologically, lipopolysaccharide (LPS) is present in the bloodstream and can be bound to several proteins for its transport (i.e.) LPS binding protein (LBP) and plasma lipoproteins). LPS receptors CD14 and TLR-4 are constitutively expressed in the Central Nervous System (CNS). To our knowledge, LPS infiltration in CNS has not been clearly demonstrated. A naturalistic experiment with healthy rats was performed to investigate whether LPS is present with its receptors in brain. Immunofluorescences showed that lipid A and core LPS were present in circumventricular organs, choroid plexus, meningeal cells, astrocytes, tanycytes and endothelial cells. Co-localization of LPS regions with CD14/TLR-4 was found. The role of lipoprotein receptors (SR-BI, ApoER2 and LDLr) in the brain as targets for a LPS transport mechanism by plasma apolipoproteins (i.e. ApoAI) was studied. Co-localization of LPS regions with these lipoproteins markers was observed. Our results suggest that LPS infiltrates in the brain in physiological conditions, possibly, through a lipoprotein transport mechanism, and it is bound to its receptors in blood-brain interfaces.

Indexed as

AnimalsAntibodiesApolipoprotein A-IBrainFluorescent Antibody TechniqueLipopolysaccharide ReceptorsLipopolysaccharidesLipoproteinsMaleRatsRats, WistarScavenger Receptors, Class BToll-Like Receptor 4AntibodiesApolipoprotein A-ILipopolysaccharide ReceptorsLipopolysaccharidesLipoproteinsScarb1 protein, ratScavenger Receptors, Class BToll-Like Receptor 4

Identifiers

PMID29030613
PMCPMC5640642
OpenAlexW2764294324

What OpenQuestion holds

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LicenceCC BY
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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.