Evidence map›Paper›PMID 1313721›Full record

ArticleBritish journal of pharmacology1992

Low dihydropyridine receptor density in vasa deferentia of castrated rats.

C J Castillo, S Lafayette, A Caricati-Neto, M Sette, N H Jurkiewicz, A G García, A Jurkiewicz

Open access · bronzeAbstract read
In one paragraph

Article in British journal of pharmacology, 1992. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
1.3field-weighted citation impact, top 20% 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

1 citing paper in PubMed, 22 citations in OpenAlex.

  1. 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

7 authors at 2 institutions in 2 countries.

C J CastilloDepartment of Pharmacology, Escola Paulista de Medicina, São Paulo, Brazil.
S Lafayette
A Caricati-Neto
M Sette
N H Jurkiewicz
A G García
A Jurkiewicz
Associação Paulista de Medicina · BRUniversidad Autónoma de Madrid · ES

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Radioligand binding studies in crude membrane preparations of vasa deferentia of normal rats, with the 1,4-dihydropyridine (+)-[3H]-PN200-110 (isradipine) showed typical saturation isotherms. The binding exhibited a KD of 259 +/- 60 pM and Bmax of 144 +/- 20 fmol mg-1 protein. The low KD and the stereoselective displacement of (+)-[3H]-PN200-110 binding by (+)- and (-)-PN200-110 and by nifedipine suggests that these tissues contain dihydropyridine receptors probably coupled to voltage-sensitive, L-type calcium channels. In membrane preparations from vasa deferentia from rats castrated 30 days previously the maximum specific binding was 25 +/- 10 fmol mg-1 protein, representing only 11% of total binding; thus, the calculation of reliable KD values was not feasible. These findings suggest that a testicular hormone, possibly testosterone, plays an important role in the regulation of dihydropyridine-sensitive, voltage-dependent calcium channels in the rat vas deferens.

Indexed as

OrchiectomyAnimalsCalcium Channel BlockersCalcium ChannelsDihydropyridinesIsradipineKineticsMaleMembranesNifedipineRadioligand AssayRatsRats, Inbred StrainsReceptors, NicotinicVas DeferensCalcium Channel BlockersCalcium ChannelsDihydropyridinesIsradipineNifedipineReceptors, Nicotinic

Identifiers

PMID1313721
PMCPMC1908652
OpenAlexW2047839164

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.