Evidence map›Paper›PMID 28176234›Full record

ArticleThe journal of headache and pain2017

Frequent mild head injury promotes trigeminal sensitivity concomitant with microglial proliferation, astrocytosis, and increased neuropeptide levels in the trigeminal pain system.

Ashley L Tyburski, Lan Cheng, Soroush Assari, Kurosh Darvish, Melanie B Elliott

Open access · goldAbstract read
In one paragraph

Article in The journal of headache and pain, 2017. 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
6.2field-weighted citation impact, top 3% 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, 63 citations in OpenAlex.

  1. Article
  2. Review
  3. Article
  4. Article
  5. Review
  6. Review
  7. Article
  8. Article
  9. Review
  10. Review
  11. Article
  12. Review
  13. Review
  14. Review
  15. Review
  16. Review
  17. Review
  18. Article
  19. Article
  20. 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 2 institutions in 1 country.

Ashley L TyburskiDepartment of Neurosurgery, Thomas Jefferson University, 1020 Locust Street, Philadelphia, PA, 19107, USA.
Lan ChengDepartment of Neurosurgery, Thomas Jefferson University, 1020 Locust Street, Philadelphia, PA, 19107, USA.
Soroush AssariTemple University, Philadelphia, PA, USA.
Kurosh DarvishTemple University, Philadelphia, PA, USA.
Melanie B ElliottDepartment of Neurosurgery, Thomas Jefferson University, 1020 Locust Street, Philadelphia, PA, 19107, USA. Melanie.elliott@jefferson.edu.
Thomas Jefferson University · USTemple University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundFrequent mild head injuries or concussion along with the presence of headache may contribute to the persistence of concussion symptoms.

methodsIn this study, the acute effects of recovery between mild head injuries and the frequency of injuries on a headache behavior, trigeminal allodynia, was assessed using von Frey testing up to one week after injury, while histopathological changes in the trigeminal pain pathway were evaluated using western blot, ELISA and immunohistochemistry. 

resultsA decreased recovery time combined with an increased mild closed head injury (CHI) frequency results in reduced trigeminal allodynia thresholds compared to controls. The repetitive CHI group with the highest injury frequency showed the greatest reduction in trigeminal thresholds along with greatest increased levels of calcitonin gene-related peptide (CGRP) in the trigeminal nucleus caudalis. Repetitive CHI resulted in astrogliosis in the central trigeminal system, increased GFAP protein levels in the sensory barrel cortex, and an increased number of microglia cells in the trigeminal nucleus caudalis.

conclusionsHeadache behavior in rats is dependent on the injury frequency and recovery interval between mild head injuries. A worsening of headache behavior after repetitive mild head injuries was concomitant with increases in CGRP levels, the presence of astrocytosis, and microglia proliferation in the central trigeminal pathway. Signaling between neurons and proliferating microglia in the trigeminal pain system may contribute to the initiation of acute headache after concussion or other traumatic brain injuries.

Indexed as

AnimalsCalcitonin Gene-Related PeptideCraniocerebral TraumaDisease Models, AnimalGliosisHeadacheHyperalgesiaMaleMicrogliaRatsRats, Sprague-DawleyTrigeminal Caudal NucleusTrigeminal Nerve DiseasesCalcitonin Gene-Related PeptideAstrocytosisCalcitonin gene-related peptideConcussionMicrogliaMigrainePost-traumatic headacheTraumatic brain injuryTrigeminal

Identifiers

PMID28176234
PMCPMC5296267
OpenAlexW2587581342

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.