Evidence map›Paper›PMID 19570028›Full record

ArticleASN neuro2009

Brain injury expands the numbers of neural stem cells and progenitors in the SVZ by enhancing their responsiveness to EGF.

Dhivyaa Alagappan, Deborah A Lazzarino, Ryan J Felling, Murugabaskar Balan, Sergei V Kotenko, Steven W Levison

Open access · goldAbstract readComparative Study
In one paragraph

Article in ASN neuro, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed
2.4field-weighted citation impact, top 13% 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

34 citing papers in PubMed, 61 citations in OpenAlex.

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  17. Mechanisms of mouse neural precursor expansion after neonatal hypoxia-ischemia.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2015
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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 1 institution in 1 country.

Dhivyaa AlagappanDepartment of Neurology and Neuroscience, UMDNJ-New Jersey Medical School, Newark, NJ 07103, USA.
Deborah A Lazzarino
Ryan J Felling
Murugabaskar Balan
Sergei V Kotenko
Steven W Levison
Rutgers, The State University of New Jersey · US

Funding

Neural Stem Cell Responses to Perinatal Brain DamageR01MH059950 · NIMH · UNIV OF MED/DENT OF NJ-NJ MEDICAL SCHOOL · PI LEVISON, STEVEN W · 1999 to 2008
$1.9M
Reactive neural stem cells in perinatal brain damageF31NS046903 · NINDS · PENNSYLVANIA STATE UNIV HERSHEY MED CTR · PI FELLING, RYAN J · 2003 to 2004
$50k
DETERMINANTS OF PROGENITOR CELL FATE IN THE CNSR29NS033251 · NINDS · PENNSYLVANIA STATE UNIV HERSHEY MED CTR · PI LEVISON, STEVEN W · 1994 to 1999
–
NIMH NIH HHS MH 059950NINDS NIH HHS F31 NS046903NINDS NIH HHS NS 0469903
6 · The paper itself

Abstract

There is an increase in the numbers of neural precursors in the SVZ (subventricular zone) after moderate ischaemic injuries, but the extent of stem cell expansion and the resultant cell regeneration is modest. Therefore our studies have focused on understanding the signals that regulate these processes towards achieving a more robust amplification of the stem/progenitor cell pool. The goal of the present study was to evaluate the role of the EGFR [EGF (epidermal growth factor) receptor] in the regenerative response of the neonatal SVZ to hypoxic/ischaemic injury. We show that injury recruits quiescent cells in the SVZ to proliferate, that they divide more rapidly and that there is increased EGFR expression on both putative stem cells and progenitors. With the amplification of the precursors in the SVZ after injury there is enhanced sensitivity to EGF, but not to FGF (fibroblast growth factor)-2. EGF-dependent SVZ precursor expansion, as measured using the neurosphere assay, is lost when the EGFR is pharmacologically inhibited, and forced expression of a constitutively active EGFR is sufficient to recapitulate the exaggerated proliferation of the neural stem/progenitors that is induced by hypoxic/ischaemic brain injury. Cumulatively, our results reveal that increased EGFR signalling precedes that increase in the abundance of the putative neural stem cells and our studies implicate the EGFR as a key regulator of the expansion of SVZ precursors in response to brain injury. Thus modulating EGFR signalling represents a potential target for therapies to enhance brain repair from endogenous neural precursors following hypoxic/ischaemic and other brain injuries.

Indexed as

AnimalsAnimals, NewbornBrain InjuriesCell CountCells, CulturedCerebral VentriclesEpidermal Growth FactorErbB ReceptorsFemaleNeural Stem CellsPregnancyRatsRats, WistarStem CellsEpidermal Growth FactorErbB Receptors

Identifiers

PMID19570028
PMCPMC2695583
OpenAlexW2022386172

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.