Evidence map›Paper›PMID 28579520›Full record

ArticleBrain, behavior, and immunity2017

Live imaging of the innate immune response in neonates reveals differential TLR2 dependent activation patterns in sterile inflammation and infection.

Melanie Lalancette-Hébert, Joel Faustino, Sai Sampath Thammisetty, Sophorn Chip, Zinaida S Vexler, Jasna Kriz

Open access · hybridAbstract read
In one paragraph

Article in Brain, behavior, and immunity, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
1.9field-weighted citation impact, top 15% 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

23 citing papers in PubMed, 33 citations in OpenAlex.

  1. Article
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  6. Targeting SRSF3 restores immune mRNA translation in microglia/macrophages following cerebral ischemia.Molecular therapy : the journal of the American Society of Gene Therapy · 2024
    Article
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  11. How to Select Firefly Luciferin Analogues for In Vivo Imaging.International journal of molecular sciences · 2021
    Review
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  15. Neonatal Stroke and TLR1/2 Ligand Recruit Myeloid Cells through the Choroid Plexus in a CX3CR1-CCR2- and Context-Specific Manner.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2020
    Article
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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

6 authors at 3 institutions in 2 countries.

Melanie Lalancette-HébertDepartment of Psychiatry and Neuroscience, Faculty of Medicine, Laval University, Research Center of the IUSMQ, 2601, de la Canardière, Québec, QC G1J 2G3, Canada.
Joel FaustinoDepartment of Neurology, University of California, San Francisco, San Francisco, CA 94158-0663, USA.
Sai Sampath ThammisettyDepartment of Psychiatry and Neuroscience, Faculty of Medicine, Laval University, Research Center of the IUSMQ, 2601, de la Canardière, Québec, QC G1J 2G3, Canada.
Sophorn ChipDepartment of Neurology, University of California, San Francisco, San Francisco, CA 94158-0663, USA.
Zinaida S VexlerDepartment of Neurology, University of California, San Francisco, San Francisco, CA 94158-0663, USA. Electronic address: Zena.Vexler@ucsf.edu.
Jasna KrizDepartment of Psychiatry and Neuroscience, Faculty of Medicine, Laval University, Research Center of the IUSMQ, 2601, de la Canardière, Québec, QC G1J 2G3, Canada. Electronic address: jasna.kriz@fmed.ulaval.ca.
University of California, San Francisco · USInstitut Universitaire en Santé Mentale de Québec · CAUniversité Laval · CA

Funding

Neonatal Stroke: The Role of Microglia-derived Extracellular VesiclesR01NS044025 · NINDS · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI VEXLER, ZINAIDA S · 2002 to 2023
$7.7M
Macrophages as modulators of repair after neonatal strokeR01NS076726 · NINDS · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI VEXLER, ZINAIDA S · 2012 to 2016
$1.8M
Leukocyte trafficking through the choroid plexus as modulator of neonatal focal strokeR21NS098514 · NINDS · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI VEXLER, ZINAIDA S · 2016 to 2017
$427k
NINDS NIH HHS R01 NS044025NINDS NIH HHS R01 NS076726NINDS NIH HHS R21 NS098514
6 · The paper itself

Abstract

Activation of microglial cells in response to brain injury and/or immune stimuli is associated with a marked induction of Toll-like receptors (TLRs). While in adult brain, the contribution of individual TLRs, including TLR2, in pathophysiological cascades has been well established, their role and spatial and temporal induction patterns in immature brain are far less understood. To examine whether infectious stimuli and sterile inflammatory stimuli trigger distinct TLR2-mediated innate immune responses, we used three models in postnatal day 9 (P9) mice, a model of infection induced by systemic endotoxin injection and two models of sterile inflammation, intra-cortical IL-1β injection and transient middle cerebral artery occlusion (tMCAO). We took advantage of a transgenic mouse model bearing the dual reporter system luciferase/GFP under transcriptional control of a murine TLR2 promoter (TLR2-luc-GFP) to visualize the TLR2 response in the living neonatal brain and then determined neuroinflammation, microglial activation and leukocyte infiltration. We show that in physiological postnatal brain development the in vivo TLR2-luc signal undergoes a marked ∼30-fold decline and temporal-spatial changes during the second and third postnatal weeks. We then show that while endotoxin robustly induces the in vivo TLR2-luc signal in the living brain and increases levels of several inflammatory cytokines and chemokines, the in vivo TLR2-luc signal is reduced after both IL-1β and tMCAO and the inflammatory response is muted. Immunofluorescence revealed that microglial cells are the predominant source of TLR2 production during postnatal brain development and in all three neonatal models studied. Flow cytometry revealed developmental changes in CD11b

Indexed as

AnimalsAnimals, NewbornBrainChemokinesCytokinesDisease Models, AnimalImmunity, InnateInfarction, Middle Cerebral ArteryInflammationInflammation MediatorsInterleukin-1betaMacrophage ActivationMiceMice, TransgenicMicrogliaMonocytesChemokinesCytokinesInflammation MediatorsInterleukin-1betaTlr2 protein, mouseToll-Like Receptor 2Toll-Like ReceptorsBiophotonic/bioluminescence imagingIL-1βLPSMicrogliaNeonateTLR2tMCAO

Identifiers

PMID28579520
PMCPMC6151183
OpenAlexW2620877422

What OpenQuestion holds

Textmetadata
LicenceTDM
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.