Evidence map›Paper›PMID 8968560›Full record

ArticleBritish journal of pharmacology1996

Antagonism of the effects of (+)-PD 128907 on midbrain dopamine neurones in rat brain slices by a selective D2 receptor antagonist L-741,626.

B J Bowery, Z Razzaque, F Emms, S Patel, S Freedman, L Bristow, J Kulagowski, G R Seabrook

Open access · bronzeAbstract read
In one paragraph

Article in British journal of pharmacology, 1996. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
1.4field-weighted citation impact, top 19% 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

27 citing papers in PubMed, 58 citations in OpenAlex.

  1. GαCommunications biology · 2026
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  5. Relaxation of thoracic aorta and pulmonary artery rings of marmosets (Callithrix spp.) by endothelium-derived 6-nitrodopamine.Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologica · 2023
    Article
  6. Article
  7. Dopamine DPflugers Archiv : European journal of physiology · 2020
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  19. Aberrant dopamine D2-like receptor function in a rodent model of schizophrenia.The Journal of pharmacology and experimental therapeutics · 2012
    Article
  20. Article
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 1 institution in 1 country.

B J BoweryMerck Sharp & Dohme Research Laboratories, Neuroscience Research Centre, Harlow, Essex.
Z Razzaque
F Emms
S Patel
S Freedman
L Bristow
J Kulagowski
G R Seabrook
Merck & Co., Inc., Rahway, NJ, USA (United States) · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

1. The ability of PD 128907 to activate dopamine receptors in the ventral tegmental area, substantia nigra pars compacta, and striatum was investigated by use of in vitro electrophysiological recording and fast cyclic voltammetry. The affinity of a novel D2 selective antagonist L-741,626 for receptors activated by this agonist was measured to determine if its effects were mediated by D2 or D3 receptors. 2. The active (+) enantiomer of PD 128907 bound with high affinity and selectivity to rat D3 dopamine receptors. The Ki values for (+)-PD 128907 were 620 nM at D2, 1 nM at D3 and 720 nM at D4 receptors. 3. (+)-PD 128907 inhibited cell firing in both the ventral tegmental area and substantia nigra pars compacta with EC50 values of 33 nM (pEC50 = 7.48 +/- 0.10, n = 10) and 38 nM (pEC50 = 7.42 +/- 0.15, n = 5), respectively. No effects of (+)-PD 128907 (100 nM) were observed on glutamate or GABA-mediated synaptic potentials elicited by focal bipolar stimulation. 4. L-741,626 antagonized these effects of (+)-PD 128907 in a concentration-dependent and surmountable manner with an affinity, determined from Schild analysis, of 20 nM (pKB = 7.71 +/- 0.14) in the ventral tegmental area and 11 nM (pKB = 7.95 +/- 0.18) in the substantia nigra pars compacta. 5. (+)-PD 128907 also inhibited dopamine release in the caudate-putamen with an EC50 of 66 nM (n = 5). The affinity of L-741,626 for these nerve terminal autoreceptors (pKB = 7.71 +/- 0.06; = 20 nM) was identical to that observed on midbrain dopamine neurones. 6. These data demonstrate that the D3 receptor ligand (+)-PD 128907 is a potent agonist on rat midbrain dopamine neurones. However, its lack of regional selectivity, and the high affinity of the selective D2 receptor antagonist L-741,626 for receptors activated by (+)-PD 128907, was more consistent with an action on D2 autoreceptors rather than upon a D3 dopamine receptor subtype.

Indexed as

Dopamine D2 Receptor AntagonistsAnimalsBenzopyransCloning, MolecularDopamine AgonistsDopamine AntagonistsElectrophysiologyIndolesMaleMesencephalonNeuronsOxazinesPatch-Clamp TechniquesPiperidinesRatsRats, Sprague-Dawley3,4,4a,10b-tetrahydro-4-propyl-2H,5H-(1)benzopyrano(4,3-b)-1,4-oxazin-9-ol3-(4-(4-chlorophenyl-4-hydroxypiperidino)methyl)indoleBenzopyransDopamine AgonistsDopamine AntagonistsDopamine D2 Receptor AntagonistsDrd3 protein, ratDrd4 protein, ratIndolesOxazinesPiperidinesReceptors, Dopamine D2Receptors, Dopamine D3Receptors, Dopamine D4Spiperone

Identifiers

PMID8968560
PMCPMC1915834
OpenAlexW2089718542

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.