Evidence map›Paper›PMID 34510920›Full record

ArticleCephalalgia : an international journal of headache2022

A prolactin-dependent sexually dimorphic mechanism of migraine chronification.

Daigo Ikegami, Edita Navratilova, Xu Yue, Aubin Moutal, Caroline M Kopruszinski, Rajesh Khanna, Amol Patwardhan, David W Dodick, Frank Porreca

Open access · greenAbstract read
In one paragraph

Article in Cephalalgia : an international journal of headache, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 1 pooled it
3.2field-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

25 citing papers in PubMed, 1 synthesis or guideline pooled it, 37 citations in OpenAlex.

  1. Prolactin and pain of endometriosis.Pharmacology & therapeutics · 2023
    Pooled it
  2. Article
  3. The therapeutic pipeline in migraine: What does the future hold?Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2026
    Review
  4. Article
  5. Article
  6. Review
  7. Article
  8. Article
  9. Article
  10. A prolactin-targeting antibody to prevent stress-induced peripheral nociceptor sensitization and female postoperative pain.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  11. Review
  12. Article
  13. Chronification of migraine sensitizes to CGRP in male and female mice.Cephalalgia : an international journal of headache · 2025
    Article
  14. Article
  15. Article
  16. Article
  17. Role of HDAC5 Epigenetics in Chronic Craniofacial Neuropathic Pain.International journal of molecular sciences · 2024
    Review
  18. Female-selective mechanisms promoting migraine.The journal of headache and pain · 2024
    Review
  19. Review
  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

9 authors at 2 institutions in 1 country.

Daigo IkegamiDepartment of Pharmacology, College of Medicine, University of Arizona, Tucson, AZ 85724.
Edita NavratilovaDepartment of Pharmacology, College of Medicine, University of Arizona, Tucson, AZ 85724.ORCID 0000-0002-1497-125X
Xu YueDepartment of Pharmacology, College of Medicine, University of Arizona, Tucson, AZ 85724.
Aubin MoutalDepartment of Pharmacology, College of Medicine, University of Arizona, Tucson, AZ 85724.
Caroline M KopruszinskiDepartment of Pharmacology, College of Medicine, University of Arizona, Tucson, AZ 85724.
Rajesh KhannaDepartment of Pharmacology, College of Medicine, University of Arizona, Tucson, AZ 85724.
Amol PatwardhanDepartment of Pharmacology, College of Medicine, University of Arizona, Tucson, AZ 85724.
David W DodickDepartments of Neurology and Neuroscience, Mayo Clinic, Scottsdale, AZ 85259.
Frank PorrecaDepartment of Pharmacology, College of Medicine, University of Arizona, Tucson, AZ 85724.
University of Arizona · USMayo Clinic in Arizona · US

Funding

New Modalities for the Treatment of Pain and Drug Abuse-Biochemical CoreP01DA041307 · NIDA · UNIVERSITY OF ARIZONA · PI PORRECA, FRANK · 2017 to 2021
$3.0M
A prolactin-mediated neuroendocrine link between stress-induced latent sensitization and female-selective painR01NS120395 · NINDS · UNIVERSITY OF ARIZONA · PI NAVRATILOVA, EDITA, NEUGEBAUER, VOLKER · 2021 to 2025
$2.3M
Exploring CRMP5 as a novel target for Alzheimers diseaseR01NS119263 · NINDS · UNIVERSITY OF ARIZONA · PI Aubin Moutal · 2021 to 2026
$2.2M
NIDA NIH HHS P01 DA041307NINDS NIH HHS R01 NS119263NINDS NIH HHS R01 NS120395
6 · The paper itself

Abstract

objectiveDetermination of possible sex differences in mechanisms promoting migraine progression and the contribution of prolactin and the prolactin long (PRLR-L) and short (PRLR-S) receptor isoforms.

backgroundThe majority of patients with chronic migraine and medication overuse headache are female. Prolactin is present at higher levels in women and increases migraine. Prolactin signaling at the PRLR-S selectively sensitizes nociceptors in female rodents, while expression of the PRLR-L is protective.

methodsMedication overuse headache was modeled by repeated sumatriptan administration in male and female mice. Periorbital and hindpaw cutaneous allodynia served as a surrogate of migraine-like pain. PRLR-L and PRLR-S isoforms were measured in the trigeminal ganglion with western blotting. Possible co-localization of PRLR with serotonin 5HT1B and 5HT1D receptors was determined with RNAscope. Cabergoline, a dopamine receptor agonist that inhibits circulating prolactin, was co-administered with sumatriptan. Nasal administration of CRISPR/Cas9 plasmid was used to edit expression of both PRLR isoforms.

resultsPRLR was co-localized with 5HT1B or 5HT1D receptors in the ophthalmic region of female trigeminal ganglion. A single injection of sumatriptan increased serum PRL levels in female mice. Repeated sumatriptan promoted cutaneous allodynia in both sexes but down-regulated trigeminal ganglion PRLR-L, without altering PRLR-S, only in females. Co-administration of sumatriptan with cabergoline prevented allodynia and down-regulation of PRLR-L only in females. CRISPR/Cas9 editing of both PRLR isoforms in the trigeminal ganglion prevented sumatriptan-induced periorbital allodynia in females.

interpretationWe identified a sexually dimorphic mechanism of migraine chronification that involves down-regulation of PRLR-L and increased signaling of circulating prolactin at PRLR-S. These studies reveal a previously unrecognized neuroendocrine mechanism linking the hypothalamus to nociceptor sensitization that increases the risk of migraine pain in females and suggest opportunities for novel sex-specific therapies including gene editing through nasal delivery of CRISPR/Cas9 constructs.

Indexed as

Headache Disorders, SecondaryMigraine DisordersAnimalsFemaleHumansHyperalgesiaMaleMiceProlactinSumatriptanProlactinSumatriptanallodyniahypothalamusmedication overuse headachenociceptorprolactin receptorsensitizationSumatriptan

Identifiers

PMID34510920
PMCPMC11668309
OpenAlexW3199577057

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.