Evidence map›Paper›PMID 22296971›Full record

ArticleMolecular neurodegeneration2012

Nurr1 regulates Top IIβ and functions in axon genesis of mesencephalic dopaminergic neurons.

Xin Heng, Gang Jin, Xin Zhang, Dehuang Yang, Mingzhe Zhu, Shijun Fu, Xuping Li, Weidong Le

Open access · goldAbstract read
In one paragraph

Article in Molecular neurodegeneration, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed, 1 pooled it
1.0field-weighted citation impact, top 29% 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

30 citing papers in PubMed, 1 synthesis or guideline pooled it, 46 citations in OpenAlex.

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  20. TOP2B: The First Thirty Years.International journal of molecular sciences · 2018
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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

8 authors at 5 institutions in 2 countries.

Xin HengInstitute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.
Gang Jin
Xin Zhang
Dehuang Yang
Mingzhe Zhu
Shijun Fu
Xuping Li
Weidong Le
Shanghai Institutes for Biological Sciences · CNRuijin Hospital · CNBaylor College of Medicine · USChinese Academy of Sciences · CNShanghai Jiao Tong University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundNURR1 (also named as NR4A2) is a member of the steroid/thyroid hormone receptor family, which can bind to DNA and modulate expression of target genes. Previous studies have shown that NURR1 is essential for the nigral dopaminergic neuron phenotype and function maintenance, and the defects of the gene are possibly associated with Parkinson's disease (PD).

resultsIn this study, we used new born Nurr1 knock-out mice combined with Affymetrix genechip technology and real time polymerase chain reaction (PCR) to identify Nurr1 regulated genes, which led to the discovery of several transcripts differentially expressed in the nigro-striatal pathway of Nurr1 knock-out mice. We found that an axon genesis gene called Topoisomerase IIβ (Top IIβ) was down-regulated in Nurr1 knock-out mice and we identified two functional NURR1 binding sites in the proximal Top IIβ promoter. While in Top IIβ null mice, we saw a significant loss of dopaminergic neurons in the substantial nigra and lack of neurites along the nigro-striatal pathway. Using specific TOP II antagonist ICRF-193 or Top IIβ siRNA in the primary cultures of ventral mesencephalic (VM) neurons, we documented that suppression of TOP IIβ expression resulted in VM neurites shortening and growth cones collapsing. Furthermore, microinjection of ICRF-193 into the mouse medial forebrain bundle (MFB) led to the loss of nigro-striatal projection.

conclusionTaken together, our findings suggest that Top IIβ might be a down-stream target of Nurr1, which might influence the processes of axon genesis in dopaminergic neurons via the regulation of TOP IIβ expression. The Nurr1-Top IIβ interaction may shed light on the pathologic role of Nurr1 defect in the nigro-striatal pathway deficiency associated with PD.

Indexed as

AnimalsAnimals, NewbornAxonsCell ShapeDiketopiperazinesDNA-Binding ProteinsDNA Topoisomerases, Type IIDopaminergic NeuronsDown-RegulationGene Expression Regulation, DevelopmentalMesencephalonMiceMice, KnockoutNuclear Receptor Subfamily 4, Group A, Member 2PiperazinesTopoisomerase II Inhibitors4,4'-(1,2-dimethyl-1,2-ethanediyl)bis-2,6-piperazinedioneDiketopiperazinesDNA-Binding ProteinsDNA Topoisomerases, Type IINuclear Receptor Subfamily 4, Group A, Member 2PiperazinesTopoisomerase II Inhibitors

Identifiers

PMID22296971
PMCPMC3359158
OpenAlexW2029829796

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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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.