Evidence map›Paper›PMID 33167864›Full record

ArticleThe journal of headache and pain2020

Estrogen receptors α, β and GPER in the CNS and trigeminal system - molecular and functional aspects.

Karin Warfvinge, Diana N Krause, Aida Maddahi, Jacob C A Edvinsson, Lars Edvinsson, Kristian A Haanes

Open access · goldAbstract read
In one paragraph

Article in The journal of headache and pain, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 62 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
62citing papers in PubMed, 1 pooled it
9.9field-weighted citation impact, top 1% 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

62 citing papers in PubMed, 1 synthesis or guideline pooled it, 101 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Review
  4. Article
  5. Article
  6. Review
  7. Review
  8. Observational
  9. Review
  10. Hypothalamic and sex-related hormones in migraine.The journal of headache and pain · 2026
    Review
  11. Review
  12. Review
  13. Article
  14. Article
  15. Article
  16. Article
  17. Review
  18. Review
  19. Article
  20. Sexual Dimorphism in Migraine. Focus on Mitochondria.Current pain and headache reports · 2025
    Review

2 more citing papers are in PubMed but not listed here.

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

6 authors at 3 institutions in 3 countries.

Karin WarfvingeDepartment of Clinical Experimental Research, Glostrup Research Institute, Rigshospitalet, Glostrup, Denmark.
Diana N KrauseDivision of Experimental Vascular Research, Department of Clinical Sciences, Lund University Hospital, Lund, Sweden.
Aida MaddahiDepartment of Clinical Experimental Research, Glostrup Research Institute, Rigshospitalet, Glostrup, Denmark.
Jacob C A EdvinssonDepartment of Clinical Experimental Research, Glostrup Research Institute, Rigshospitalet, Glostrup, Denmark.
Lars EdvinssonDepartment of Clinical Experimental Research, Glostrup Research Institute, Rigshospitalet, Glostrup, Denmark. lars.edvinsson@med.lu.se.ORCID http://orcid.org/0000-0002-1805-1346
Kristian A HaanesDepartment of Clinical Experimental Research, Glostrup Research Institute, Rigshospitalet, Glostrup, Denmark.
Lund University · SEGlostrup Hospital · DKUniversity of Copenhagen · DK

Funding

Lundbeckfonden no. R59-A5404
6 · The paper itself

Abstract

backgroundMigraine occurs 2-3 times more often in females than in males and is in many females associated with the onset of menstruation. The steroid hormone, 17β-estradiol (estrogen, E2), exerts its effects by binding and activating several estrogen receptors (ERs). Calcitonin gene-related peptide (CGRP) has a strong position in migraine pathophysiology, and interaction with CGRP has resulted in several successful drugs for acute and prophylactic treatment of migraine, effective in all age groups and in both sexes.

methodsImmunohistochemistry was used for detection and localization of proteins, release of CGRP and PACAP investigated by ELISA and myography/perfusion arteriography was performed on rat and human arterial segments.

resultsERα was found throughout the whole brain, and in several migraine related structures. ERβ was mainly found in the hippocampus and the cerebellum. In trigeminal ganglion (TG), ERα was found in the nuclei of neurons; these neurons expressed CGRP or the CGRP receptor in the cytoplasm. G-protein ER (GPER) was observed in the cell membrane and cytoplasm in most TG neurons. We compared TG from males and females, and females expressed more ER receptors. For neuropeptide release, the only observable difference was a baseline CGRP release being higher in the pro-estrous state as compared to estrous state. In the middle cerebral artery (MCA), we observed similar dilatory ER-responses between males and females, except for vasodilatory ERβ which we observed only in female arteries.

conclusionThese data reveal significant differences in ER receptor expression between male and female rats. This contrasts to CGRP and PACAP release where we did not observe discernable difference between the sexes. Together, this points to a hypothesis where estrogen could have a modulatory role on the trigeminal neuron function in general rather than on the acute CGRP release mechanisms and vasomotor responses.

Indexed as

AnimalsCalcitonin Gene-Related PeptideCentral Nervous SystemEstrogen Receptor alphaEstrogen Receptor betaFemaleHumansMaleMigraine DisordersNeuronsPituitary Adenylate Cyclase-Activating PolypeptideRatsRats, Sprague-DawleyReceptors, Calcitonin Gene-Related PeptideSignal TransductionTrigeminal GanglionCalcitonin Gene-Related PeptideEstrogen Receptor alphaEstrogen Receptor betaPituitary Adenylate Cyclase-Activating PolypeptideReceptors, Calcitonin Gene-Related PeptideBrainCGRPEstrogen receptorsImmunohistochemistryMCAMyographyPACAPTrigeminal ganglion

Identifiers

PMID33167864
PMCPMC7653779
OpenAlexW3101878858

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.