Evidence map›Paper›PMID 19413571›Full record

ArticleBritish journal of pharmacology2009

The histamine H4 receptor is functionally expressed on neurons in the mammalian CNS.

W M Connelly, F C Shenton, N Lethbridge, R Leurs, H J Waldvogel, R L M Faull, G Lees, P L Chazot

Open access · greenAbstract read
In one paragraph

Article in British journal of pharmacology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 75 papers.

0numbers the graph read from it
0cells of the map it votes in
75citing papers in PubMed
6.9field-weighted citation impact, top 2% 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

75 citing papers in PubMed, 186 citations in OpenAlex.

  1. Trial
  2. Sex differences in neuromodulatory subcortical systems and their implications for Alzheimer's disease.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026
    Review
  3. Article
  4. Targeting Histamine H4 Receptor in the Rostral Ventromedial Medulla to Relieve Hypertension.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025
    Article
  5. Article
  6. Review
  7. Histamine HBiomolecules · 2024
    Review
  8. Atopic Dermatitis: Managing the Itch.Advances in experimental medicine and biology · 2024
    Article
  9. Article
  10. Histamine HNaunyn-Schmiedeberg's archives of pharmacology · 2023
    Article
  11. Article
  12. Article
  13. Article
  14. Migraine, Allergy, and Histamine: Is There a Link?Journal of clinical medicine · 2023
    Review
  15. Trisubstituted 1,3,5-Triazines as Histamine HMolecules (Basel, Switzerland) · 2023
    Article
  16. Review
  17. Precision Medicine in Antidepressants Treatment.Handbook of experimental pharmacology · 2023
    Review
  18. Basophils in pruritic skin diseases.Frontiers in immunology · 2023
    Review
  19. The Histamine HBiomolecules · 2021
    Article
  20. Review

15 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

8 authors at 4 institutions in 3 countries.

W M ConnellyDepartment of Pharmacology & Toxicology, School of Medical Sciences, University of Otago, Dunedin, New Zealand.
F C Shenton
N Lethbridge
R Leurs
H J Waldvogel
R L M Faull
G Lees
P L Chazot
Durham University · GBUniversity of Auckland · NZUniversity of Otago · NZVrije Universiteit Amsterdam · NL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposeThe histamine H4 receptor is the most recently identified of the G protein-coupled histamine receptor family and binds several neuroactive drugs, including amitriptyline and clozapine. So far, H4 receptors have been found only on haematopoietic cells, highlighting its importance in inflammatory conditions. Here we investigated the possibility that H4 receptors may be expressed in both the human and mouse CNS.

methodsImmunological and pharmacological studies were performed using a novel anti-H4 receptor antibody in both human and mouse brains, and electrophysiological techniques in the mouse brain respectively. Pharmacological tools, selective for the H4 receptor and patch clamp electrophysiology, were utilized to confirm functional properties of the H4 receptor in layer IV of the mouse somatosensory cortex.

resultsHistamine H4 receptors were prominently expressed in distinct deep laminae, particularly layer VI, in the human cortex, and mouse thalamus, hippocampal CA4 stratum lucidum and layer IV of the cerebral cortex. In layer IV of the mouse somatosensory cortex, the H4 receptor agonist 4-methyl histamine (20 micromol x L(-1)) directly hyperpolarized neurons, an effect that was blocked by the selective H4 receptor antagonist JNJ 10191584, and promoted outwardly rectifying currents in these cells. Monosynaptic thalamocortical CNQX-sensitive excitatory postsynaptic potentials were not altered by 4-methyl histamine (20 micromol x L(-1)) suggesting that H4 receptors did not act as hetero-receptors on thalamocortical glutamatergic terminals. CONCLUSIONS AND IMPLICATIONS: This is the first demonstration that histamine H4 receptors are functionally expressed on neurons, which has major implications for the therapeutic potential of these receptors in neurology and psychiatry.

Indexed as

AnimalsBrainExcitatory Postsynaptic PotentialsHumansImmunoblottingImmunohistochemistryMaleMembrane PotentialsMiceMice, Inbred C3HNeuronsPatch-Clamp TechniquesReceptors, G-Protein-CoupledReceptors, HistamineReceptors, Histamine H4HRH4 protein, humanHrh4 protein, mouseReceptors, G-Protein-CoupledReceptors, HistamineReceptors, Histamine H4

Identifiers

PMID19413571
PMCPMC2697783
OpenAlexW1917933986

What OpenQuestion holds

Textmetadata
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.