Evidence map›Paper›PMID 34980821›Full record

ArticleJournal of smooth muscle research = Nihon Heikatsukin Gakkai kikanshi2021

5-HT

Darwin Da Costa Guevara, Ernesto Trejo

Abstract read
In one paragraph

Article in Journal of smooth muscle research = Nihon Heikatsukin Gakkai kikanshi, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
–field-weighted citation impact
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

3 citing papers in PubMed.

  1. A 5-HT-mediated urethral defense against urinary tract infections.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  2. Article
  3. 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

2 authors.

Darwin Da Costa GuevaraSección de Biomembranas, Instituto de Medicina Experimental (IME), Facultad de Medicina, Universidad Central de Venezuela (UCV), Caracas, Venezuela.
Ernesto TrejoSección de Biomembranas, Instituto de Medicina Experimental (IME), Facultad de Medicina, Universidad Central de Venezuela (UCV), Caracas, Venezuela.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundSerotonin (5-hydroxytryptamine; 5-HT) performs a variety of functions in the body including the modulation of muscle tone in respiratory airways. Several studies indicate a possible role of 5-HT in the pathophysiology of bronchial hyperresponsiveness. However, the receptors and the molecular mechanisms by which 5-HT acts on airway smooth muscle (ASM) continue to be controversial. Most of the evidence suggests the participation of different subtypes of receptors in an indirect response. This study supports the proposal that 5-HT directly contracts ASM and characterizes pharmacologically the subtypes of serotonergic receptors involved. The characterization was carried out by using selective antagonists in an organ bath model allowing study of the smooth muscle of segments of bovine trachea.

resultsThe results obtained show that 5-HT

conclusionOverall, the receptors that mediate the direct serotonergic contraction of the smooth muscle of the bovine trachea are 5-HT

Indexed as

Receptors, SerotoninSerotoninAnimalsCattleMuscle ContractionMuscle, SmoothSerotonin AntagonistsReceptors, SerotoninSerotoninSerotonin Antagonistsairwaycontractionserotoninsmooth muscle

Identifiers

PMID34980821
PMCPMC8710915

What OpenQuestion holds

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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.