Evidence map›Paper›PMID 9852336›Full record

ArticleThe Journal of physiology1999

Neurotransmitters and neuromodulators controlling the hypoxic respiratory response in anaesthetized cats.

D W Richter, P Schmidt-Garcon, O Pierrefiche, A M Bischoff, P M Lalley

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of physiology, 1999. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 77 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
77citing papers in PubMed, 1 pooled it
4.0field-weighted citation impact, top 4% 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

77 citing papers in PubMed, 1 synthesis or guideline pooled it, 215 citations in OpenAlex.

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17 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors at 1 institution in 1 country.

D W RichterII. Department of Physiology, University of Gottingen, Humboldtallee 23, 37073 Gottingen, Germany. dwr@neuro-physiol.med.uni-goettingen.de
P Schmidt-Garcon
O Pierrefiche
A M Bischoff
P M Lalley
University of Göttingen · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

1. The contributions of neurotransmitters and neuromodulators to the responses of the respiratory network to acute hypoxia were analysed in anaesthetized cats. 2. Samples of extracellular fluid were collected at 1-1.5 min time intervals by microdialysis in the medullary region of ventral respiratory group neurones and analysed for their content of glutamate, gamma-aminobutyric acid (GABA), serotonin and adenosine by high performance liquid chromatography. Phrenic nerve activity was correlated with these measurements. 3. Levels of glutamate and GABA increased transiently during early periods of hypoxia, coinciding with augmented phrenic nerve activity and then fell below control during central apnoea. Serotonin and adenosine increased slowly and steadily with onset of hypoxic depression of phrenic nerve activity. 4. The possibility that serotonin contributes to hypoxic respiratory depression was tested by microinjecting the 5-HT-1A receptor agonist 8-OH-DPAT into the medullary region that is important for rhythmogenesis. Hypoxic activation of respiratory neurones and phrenic nerve activity were suppressed. Microinjections of NAN-190, a 5-HT-1A receptor blocker, enhanced hypoxic augmentation resulting in apneustic prolongation of inspiratory bursts. 5. The results reveal a temporal sequence in the release of neurotransmitters and neuromodulators and suggest a specific role for each of them in the sequential development of hypoxic respiratory disturbances.

Indexed as

Hypoxia8-Hydroxy-2-(di-n-propylamino)tetralinAdenosineAnesthesia, GeneralAnimalsCatsCell MembraneChromatography, High Pressure Liquidgamma-Aminobutyric AcidGlutamic AcidMedulla OblongataMicrodialysisMicroinjectionsPhrenic NervePiperazinesPotassium Channels1-(2-methoxyphenyl)-4-(4-(2-phthalimido)butyl)piperazine8-Hydroxy-2-(di-n-propylamino)tetralinAdenosinegamma-Aminobutyric AcidGlutamic AcidPiperazinesPotassium ChannelsReceptors, SerotoninReceptors, Serotonin, 5-HT1SerotoninSerotonin Antagonists

Identifiers

PMID9852336
PMCPMC2269078
OpenAlexW2088452585

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.