Evidence map›Paper›PMID 26125036›Full record

ArticleAnnals of clinical and translational neurology2015

A second trigeminal CGRP receptor: function and expression of the AMY1 receptor.

Christopher S Walker, Sajedeh Eftekhari, Rebekah L Bower, Andrea Wilderman, Paul A Insel, Lars Edvinsson, Henry J Waldvogel, Muhammad A Jamaluddin, Andrew F Russo, Debbie L Hay

Open access · goldAbstract read
In one paragraph

Article in Annals of clinical and translational neurology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 95 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
95citing papers in PubMed, 1 pooled it
12.8field-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

95 citing papers in PubMed, 1 synthesis or guideline pooled it, 183 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Trial
  4. Amylin: A Multi-Functional Pancreatic Hormone-A Review.Diabetes, obesity & metabolism · 2026
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  10. PACAP versus CGRP in migraine: From mouse models to clinical translation.Cephalalgia : an international journal of headache · 2025
    Review
  11. Review
  12. The Power ofCurrent issues in molecular biology · 2024
    Article
  13. Review
  14. Review
  15. Article
  16. Article
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  18. Review
  19. Article
  20. Article

35 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

10 authors at 4 institutions in 3 countries.

Christopher S WalkerSchool of Biological Sciences, University of Auckland Auckland, 1142, New Zealand ; Centre for Brain Research, University of Auckland Auckland, 1142, New Zealand.
Sajedeh EftekhariDivision of Experimental Vascular Research, Department of Clinical Sciences, Lund University Lund, Sweden.
Rebekah L BowerSchool of Biological Sciences, University of Auckland Auckland, 1142, New Zealand ; Centre for Brain Research, University of Auckland Auckland, 1142, New Zealand.
Andrea WildermanDepartments of Pharmacology and Medicine, University of California at San Diego La Jolla, California.
Paul A InselDepartments of Pharmacology and Medicine, University of California at San Diego La Jolla, California.
Lars EdvinssonDivision of Experimental Vascular Research, Department of Clinical Sciences, Lund University Lund, Sweden.
Henry J WaldvogelCentre for Brain Research, University of Auckland Auckland, 1142, New Zealand ; Department of Anatomy with Radiology, Faculty of Medical and Health Science, University of Auckland Auckland, 1142, New Zealand.
Muhammad A JamaluddinSchool of Biological Sciences, University of Auckland Auckland, 1142, New Zealand.
Andrew F RussoDepartment of Molecular Physiology and Biophysics, University of Iowa Iowa City, Iowa ; Department of Neurology, Veterans Affairs Medical Center, University of Iowa Iowa City, Iowa.
Debbie L HaySchool of Biological Sciences, University of Auckland Auckland, 1142, New Zealand ; Centre for Brain Research, University of Auckland Auckland, 1142, New Zealand.
University of Auckland · NZLund University · SEUniversity of California, San Diego · USUniversity of Iowa · US

Funding

Perivascular mechanisms of CGRP-induced migraine symptomsR01NS075599 · NINDS · UNIVERSITY OF IOWA · PI RUSSO, ANDREW F · 2011 to 2023
$5.0M
NINDS NIH HHS R01 NS075599
6 · The paper itself

Abstract

objectiveThe trigeminovascular system plays a central role in migraine, a condition in need of new treatments. The neuropeptide, calcitonin gene-related peptide (CGRP), is proposed as causative in migraine and is the subject of intensive drug discovery efforts. This study explores the expression and functionality of two CGRP receptor candidates in the sensory trigeminal system.

methodsReceptor expression was determined using Taqman G protein-coupled receptor arrays and immunohistochemistry in trigeminal ganglia (TG) and the spinal trigeminal complex of the brainstem in rat and human. Receptor pharmacology was quantified using sensitive signaling assays in primary rat TG neurons.

resultsmRNA and histological expression analysis in rat and human samples revealed the presence of two CGRP-responsive receptors (AMY1: calcitonin receptor/receptor activity-modifying protein 1 [RAMP1]) and the CGRP receptor (calcitonin receptor-like receptor/RAMP1). In support of this finding, quantification of agonist and antagonist potencies revealed a dual population of functional CGRP-responsive receptors in primary rat TG neurons.

interpretationThe unexpected presence of a functional non-canonical CGRP receptor (AMY1) at neural sites important for craniofacial pain has important implications for targeting the CGRP axis in migraine.

Identifiers

PMID26125036
PMCPMC4479521
OpenAlexW2074939801

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

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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.