Evidence map›Paper›PMID 18703633›Full record

ArticleEndocrinology2008

The effects of apelin on the electrical activity of hypothalamic magnocellular vasopressin and oxytocin neurons and somatodendritic Peptide release.

Vicky A Tobin, Philip M Bull, Sathya Arunachalam, Anne-Marie O'Carroll, Yoichi Ueta, Mike Ludwig

Open access · bronzeAbstract read
In one paragraph

Article in Endocrinology, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
4.0field-weighted citation impact, top 8% 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

21 citing papers in PubMed, 49 citations in OpenAlex.

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  7. Novel transmitters in brain stem vagal neurocircuitry: new players on the pitch.American journal of physiology. Gastrointestinal and liver physiology · 2018
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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

6 authors at 3 institutions in 2 countries.

Vicky A TobinCentre for Integrative Physiology, University of Edinburgh, Edinburgh EH8 9XD, United Kingdom.
Philip M Bull
Sathya Arunachalam
Anne-Marie O'Carroll
Yoichi Ueta
Mike Ludwig
University of Edinburgh · GBUniversity of Bristol · GBUniversity of Occupational and Environmental Health Japan · JP

Funding

Biotechnology and Biological Sciences Research Council S17615Wellcome Trust 076321
6 · The paper itself

Abstract

Apelin, a novel peptide originally isolated from bovine stomach tissue extracts, is widely but selectively distributed throughout the nervous system. Vasopressin and oxytocin are synthesized in the magnocellular neurons of the hypothalamic supraoptic nucleus (SON) and paraventricular nucleus, which are apelin-rich regions in the central nervous system. We made extracellular electrophysiological recordings from the transpharyngeally exposed SON of urethane-anaesthetized rats to assess the role of apelin in the control of the firing activity of identified magnocellular vasopressin and oxytocin neurons in vivo. Apelin-13 administration onto SON neurons via microdialysis revealed cell-specific responses; apelin-13 increased the firing rates of vasopressin cells but had no effect on the firing rate of oxytocin neurons. A direct excitatory effect of apelin-13 on vasopressin cell activity is also supported by our in vitro studies showing depolarization of membrane potential and increase in action potential firing. To assess the effects of apelin-13 on somatodendritic peptide release, we used in vitro release studies from SON explants in combination with highly sensitive and specific RIA. Apelin-13 decreases basal (by 78%; P < 0.05; n = 6) and potassium-stimulated (by 57%; P < 0.05; n = 6) vasopressin release but had no effect on somatodendritic oxytocin release. Taken together, our data suggest a local autocrine feedback action of apelin on magnocellular vasopressin neurons. Furthermore, these data show a marked dissociation between axonal and dendritic vasopressin release with a decrease in somatodendritic release but an increase in electrical activity at the cell bodies, indicating that release from these two compartments can be regulated wholly independently.

Indexed as

AnimalsDendritesElectrophysiologyFemaleHypothalamusIntercellular Signaling Peptides and ProteinsNeuronsOxytocinPeptide FragmentsRadioimmunoassayRatsRats, Sprague-DawleyRats, WistarVasopressinsapelin-13 peptideIntercellular Signaling Peptides and ProteinsOxytocinPeptide FragmentsVasopressins

Identifiers

PMID18703633
PMCPMC2670455
OpenAlexW1997028164

What OpenQuestion holds

Textmetadata
LicenceTDM
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.