Evidence map›Paper›PMID 31085199›Full record

ArticleExperimental neurology2019

The accumulation of T cells within acellular nerve allografts is length-dependent and critical for nerve regeneration.

Deng Pan, Daniel A Hunter, Lauren Schellhardt, Sally Jo, Katherine B Santosa, Ellen L Larson, Anja G Fuchs, Alison K Snyder-Warwick, Susan E Mackinnon, Matthew D Wood

Open access · greenAbstract read
In one paragraph

Article in Experimental neurology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed
3.3field-weighted citation impact, top 7% 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

33 citing papers in PubMed, 57 citations in OpenAlex.

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  11. Research status of facial nerve repair.Regenerative therapy · 2023
    Review
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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

10 authors at 1 institution in 1 country.

Deng PanDivision of Plastic Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA.
Daniel A HunterDivision of Plastic Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA.
Lauren SchellhardtDivision of Plastic Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA.
Sally JoDivision of Plastic Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA.
Katherine B SantosaDivision of Plastic Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA.
Ellen L LarsonDivision of Plastic Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA.
Anja G FuchsSection of Acute and Critical Care Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA.
Alison K Snyder-WarwickDivision of Plastic Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA.
Susan E MackinnonDivision of Plastic Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA.
Matthew D WoodDivision of Plastic Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA. Electronic address: woodmd@wustl.edu.
Washington University in St. Louis · US

Funding

Washington University Center for Translational NeuroscienceP30NS057105 · NINDS · WASHINGTON UNIVERSITY · PI HOLTZMAN, DAVID M. · 2006 to 2011
$8.7M
THE ROLE OF SCHWANN CELL SENESCENCE IN PERIPHERAL NERVE REGENERATIONR01NS086773 · NINDS · WASHINGTON UNIVERSITY · PI MACKINNON, SUSAN E · 2015 to 2019
$2.1M
NINDS NIH HHS P30 NS057105NINDS NIH HHS R01 NS086773
6 · The paper itself

Abstract

Repair of traumatic nerve injuries can require graft material to bridge the defect. The use of alternatives to bridge the defect, such as acellular nerve allografts (ANAs), is becoming more common and desired. Although ANAs support axon regeneration across short defects (<3 cm), axon regeneration across longer defects (>3 cm) is limited. It is unclear why alternatives, including ANAs, are functionally limited by length. After repairing Lewis rat nerve defects using short (2 cm) or long (4 cm) ANAs, we showed that long ANAs have severely reduced axon regeneration across the grafts and contain Schwann cells with a unique phenotype. But additionally, we found that long ANAs have disrupted angiogenesis and altered leukocyte infiltration compared to short ANAs as early as 2 weeks after repair. In particular, long ANAs contained fewer T cells compared to short ANAs. These outcomes were accompanied with reduced expression of select cytokines, including IFN-γ and IL-4, within long versus short ANAs. T cells within ANAs did not express elevated levels of IL-4, but expressed elevated levels of IFN-γ. We also directly assessed the contribution of T cells to regeneration across nerve grafts using athymic rats. Interestingly, T cell deficiency had minimal impact on axon regeneration across nerve defects repaired using isografts. Conversely, T cell deficiency reduced axon regeneration across nerve defects repaired using ANAs. Our data demonstrate that T cells contribute to nerve regeneration across ANAs and suggest that reduced T cells accumulation within long ANAs could contribute to limiting axon regeneration across these long ANAs.

Indexed as

AllograftsAnimalsGuided Tissue RegenerationNerve RegenerationRatsRats, Inbred LewRats, Sprague-DawleySciatic NerveTissue ScaffoldsT-LymphocytesAcellular nerve allograftPeripheral nerveRegenerationSchwann cellsT cells

Identifiers

PMID31085199
PMCPMC6605105
OpenAlexW2943907511

What OpenQuestion holds

Textmetadata
LicenceTDM
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.