Evidence map›Paper›PMID 34884605›Full record

ArticleInternational journal of molecular sciences2021

Macrophage Activation in the Dorsal Root Ganglion in Rats Developing Autotomy after Peripheral Nerve Injury.

Xiang Xu, Xijie Zhou, Jian Du, Xiao Liu, Liming Qing, Blake N Johnson, Xiaofeng Jia

Open access · goldAbstract read
In one paragraph

Article in International journal of molecular sciences, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
1.2field-weighted citation impact, top 21% 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

5 citing papers in PubMed, 11 citations in OpenAlex.

  1. Article
  2. Article
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  4. Article
  5. 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

7 authors at 2 institutions in 1 country.

Xiang XuDepartment of Neurosurgery, University of Maryland School of Medicine, Baltimore, MD 21201, USA.ORCID 0000-0002-8977-8438
Xijie ZhouDepartment of Neurosurgery, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
Jian DuDepartment of Neurosurgery, University of Maryland School of Medicine, Baltimore, MD 21201, USA.ORCID 0000-0001-7154-8987
Xiao LiuDepartment of Neurosurgery, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
Liming QingDepartment of Neurosurgery, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
Blake N JohnsonDepartment of Industrial and Systems Engineering, School of Neuroscience, Virginia Tech, Blacksburg, VA 24061, USA.
Xiaofeng JiaDepartment of Neurosurgery, University of Maryland School of Medicine, Baltimore, MD 21201, USA.ORCID 0000-0003-1445-8525
University of Maryland, Baltimore · USVirginia Tech · US

Funding

Stem Cell Surface Modification to Promote Nerve RegenerationR01NS117102 · NINDS · UNIVERSITY OF MARYLAND BALTIMORE · PI Xiaofeng Jia · 2021 to 2026
$2.0M
Maryland Stem Cell Research Fund 2018-MSCRFD-4271 and 2020-MSCRFD-5384NINDS NIH HHS R01 NS117102NINDS NIH HHS RO1 NS117102
6 · The paper itself

Abstract

Autotomy, self-mutilation of a denervated limb, is common in animals after peripheral nerve injury (PNI) and is a reliable proxy for neuropathic pain in humans. Understanding the occurrence and treatment of autotomy remains challenging. The objective of this study was to investigate the occurrence of autotomy in nude and Wistar rats and evaluate the differences in macrophage activation and fiber sensitization contributing to the understanding of autotomy behavior. Autotomy in nude and Wistar rats was observed and evaluated 6 and 12 weeks after sciatic nerve repair surgery. The numbers of macrophages and the types of neurons in the dorsal root ganglion (DRG) between the two groups were compared by immunofluorescence studies. Immunostaining of T cells in the DRG was also assessed. Nude rats engaged in autotomy with less frequency than Wistar rats. Autotomy symptoms were also relatively less severe in nude rats. Immunofluorescence studies revealed increased macrophage accumulation and activation in the DRG of Wistar rats. The percentage of NF200+ neurons was higher at 6 and 12 weeks in Wistar rats compared to nude rats, but the percentage of CGRP+ neurons did not differ between two groups. Additionally, macrophages were concentrated around NF200-labeled A fibers. At 6 and 12 weeks following PNI, CD4+ T cells were not found in the DRG of the two groups. The accumulation and activation of macrophages in the DRG may account for the increased frequency and severity of autotomy in Wistar rats. Our results also suggest that A fiber neurons in the DRG play an important role in autotomy.

Indexed as

Behavior, AnimalAnimalsGanglia, SpinalMacrophage ActivationPeripheral Nerve InjuriesPostoperative PainRatsRats, NudeRats, WistarSciatic NerveSelf MutilationautotomyDRGmacrophageneuropathic painperipheral nerve injury

Identifiers

PMID34884605
PMCPMC8657625
OpenAlexW3216479042

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.