Evidence map›Paper›PMID 27988344›Full record

ArticleNeurobiology of disease2017

Combined chondroitinase and KLF7 expression reduce net retraction of sensory and CST axons from sites of spinal injury.

Zimei Wang, Kristen Winsor, Christopher Nienhaus, Evan Hess, Murray G Blackmore

Open access · greenAbstract read
In one paragraph

Article in Neurobiology of disease, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
2.8field-weighted citation impact, top 10% 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

17 citing papers in PubMed, 35 citations in OpenAlex.

  1. Review
  2. Article
  3. Modulation of Both Intrinsic and Extrinsic Factors Additively Promotes Rewiring of Corticospinal Circuits after Spinal Cord Injury.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2021
    Article
  4. Article
  5. Article
  6. Article
  7. Epac2 Elevation Reverses Inhibition by Chondroitin Sulfate ProteoglycansThe Journal of neuroscience : the official journal of the Society for Neuroscience · 2019
    Article
  8. Knockdown of Fidgetin Improves Regeneration of Injured Axons by a Microtubule-Based Mechanism.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2019
    Article
  9. Review
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  17. Review
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.

Zimei WangDepartment of Biomedical Sciences, Marquette University, 53201, USA.
Kristen WinsorDepartment of Biomedical Sciences, Marquette University, 53201, USA.
Christopher NienhausDepartment of Biomedical Sciences, Marquette University, 53201, USA.
Evan HessDepartment of Biomedical Sciences, Marquette University, 53201, USA.
Murray G BlackmoreDepartment of Biomedical Sciences, Marquette University, 53201, USA. Electronic address: murray.blackmore@marquette.edu.
Marquette University · US

Funding

Functional Testing of KLF7 in Spinal Cord Injury: An Optogenetic ApproachR01NS083983 · NINDS · MARQUETTE UNIVERSITY · PI BLACKMORE, MURRAY G · 2013 to 2023
$3.5M
NINDS NIH HHS R01 NS083983
6 · The paper itself

Abstract

Axon regeneration in the central nervous system is limited both by inhibitory extracellular cues and by an intrinsically low capacity for axon growth in some CNS populations. Chondroitin sulfate proteoglycans (CSPGs) are well-studied inhibitors of axon growth in the CNS, and degradation of CSPGs by chondroitinase has been shown to improve the extension of injured axons. Alternatively, axon growth can be improved by targeting the neuron-intrinsic growth capacity through forced expression of regeneration-associated transcription factors. For example, a transcriptionally active chimera of Krüppel-like Factor 7 (KLF7) and a VP16 domain improves axon growth when expressed in corticospinal tract neurons. Here we tested the hypothesis that combined expression of chondroitinase and VP16-KLF7 would lead to further improvements in axon growth after spinal injury. Chondroitinase was expressed by viral transduction of cells in the spinal cord, while VP16-KLF7 was virally expressed in sensory neurons of the dorsal root ganglia or corticospinal tract (CST) neurons. After transection of the dorsal columns, both chondroitinase and VP16-KLF7 increased the proximity of severed sensory axons to the injury site. Similarly, after complete crush injuries, VP16-KLF7 expression increased the approach of CST axons to the injury site. In neither paradigm however, did single or combined treatment with chondroitinase or VP16-KLF7 enable regenerative growth distal to the injury. These results substantiate a role for CSPG inhibition and low KLF7 activity in determining the net retraction of axons from sites of spinal injury, while suggesting that additional factors act to limit a full regenerative response.

Indexed as

AnimalsAxonsBacterial ProteinsChondroitin ABC LyaseDisease Models, AnimalFemaleGanglia, SpinalGenetic TherapyGenetic VectorsHEK293 CellsHumansKruppel-Like Transcription FactorsMice, Inbred C57BLMutant Chimeric ProteinsNeuronal OutgrowthNeurons, AfferentBacterial ProteinsChondroitin ABC LyaseKruppel-Like Transcription FactorsMutant Chimeric ProteinsAdeno-associated virusAxon regenerationChondroitinaseChondroitin sulfate proteoglycanCorticospinalDorsal root ganglionKLF7LentivirusSpinal cord injuryTranscription factor

Identifiers

PMID27988344
PMCPMC5715811
OpenAlexW2564575724

What OpenQuestion holds

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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.