Evidence map›Paper›PMID 33573200›Full record

ArticleCells2021

Phosphorylation of Microglial IRF5 and IRF4 by IRAK4 Regulates Inflammatory Responses to Ischemia.

Conelius Ngwa, Abdullah Al Mamun, Yan Xu, Romana Sharmeen, Fudong Liu

Open access · goldAbstract read
In one paragraph

Article in Cells, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
1.6field-weighted citation impact, top 18% 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

16 citing papers in PubMed, 24 citations in OpenAlex.

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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

5 authors at 1 institution in 1 country.

Conelius NgwaDepartment of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA.
Abdullah Al MamunDepartment of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA.
Yan XuDepartment of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA.
Romana SharmeenDepartment of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA.
Fudong LiuDepartment of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA.ORCID 0000-0002-7684-9428
The University of Texas Health Science Center at Houston · US

Funding

Pyschosocial Stress and the Response to StrokeR37NS096493 · NINDS · UNIVERSITY OF TEXAS HLTH SCI CTR HOUSTON · PI MCCULLOUGH, LOUISE D. · 2016 to 2022
$5.2M
Contribution of the X Chromosome to Sex Differences in StrokeR01NS108779 · NINDS · UNIVERSITY OF TEXAS HLTH SCI CTR HOUSTON · PI LIU, FUDONG, MCCULLOUGH, LOUISE D. · 2018 to 2022
$2.7M
IRF5-IRF4 Regulatory Axis: A new Target for StrokeR01NS093042 · NINDS · UNIVERSITY OF TEXAS HLTH SCI CTR HOUSTON · PI LIU, FUDONG · 2015 to 2019
$1.7M
NINDS NIH HHS R01 NS093042NINDS NIH HHS R01 NS108779NINDS NIH HHS R37 NS096493
6 · The paper itself

Abstract

backgroundInterferon Regulatory Factor (IRF) 5 and 4 play a determinant role in regulating microglial pro- and anti-inflammatory responses to cerebral ischemia. How microglial IRF5 and IRF4 signaling are activated has been elusive. We hypothesized that interleukin-1 receptor associated kinase 4 (IRAK4) phosphorylates and activates IRF5 and IRF4 in ischemic microglia. We aimed to explore the upstream signals of the two IRFs, and to determine how the IRAK4-IRF signaling regulates the expression of inflammatory mediators, and impacts neuropathology.

methodsSpontaneously Immortalized Murine (SIM)-A9 microglial cell line, primary microglia and neurons from C57BL/6 WT mice were cultured and exposed to oxygen-glucose deprivation (OGD), followed by stimulation with LPS or IL-4. An IRAK4 inhibitor (ND2158) was used to examine IRAK4's effects on the phosphorylation of IRF5/IRF4 and the impacts on neuronal morphology by co-immunoprecipitation (Co-IP)/Western blot, ELISA, and immunofluorescence assays.

resultsWe confirmed that IRAK4 formed a Myddosome with MyD88/IRF5/IRF4, and phosphorylated both IRFs, which subsequently translocated into the nucleus. Inhibition of IRAK4 phosphorylation quenched microglial pro-inflammatory response primarily, and increased neuronal viability and neurite lengths after ischemia.

conclusionsIRAK4 signaling is critical for microglial inflammatory responses and a potential therapeutic target for neuroinflammatory diseases including cerebral ischemia.

Indexed as

AnimalsBrain IschemiaCell Culture TechniquesDisease Models, AnimalHumansInflammation MediatorsInterferon Regulatory Factor-4Interferon Regulatory FactorsMaleMiceMice, TransgenicMicrogliaPhosphorylationSignal TransductionInflammation MediatorsInterferon Regulatory Factor-4Interferon Regulatory FactorsIrf5 protein, mouseinflammationIRAK4IRF4IRF5ischemiamicroglia

Identifiers

PMID33573200
PMCPMC7912637
OpenAlexW3127970828

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.