Evidence map›Paper›PMID 2573839›Full record

ArticleNature1989

Membrane depolarization evokes neurotransmitter release in the absence of calcium entry.

B Hochner, H Parnas, I Parnas

Abstract read
PubMed Publisher
In one paragraph

Article in Nature, 1989. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
4.1field-weighted citation impact, top 5% 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

22 citing papers in PubMed, 91 citations in OpenAlex.

  1. CaProceedings of the National Academy of Sciences of the United States of America · 2019
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  3. Review
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  7. Analog modulation of mossy fiber transmission is uncoupled from changes in presynaptic Ca2+.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2008
    Article
  8. Article
  9. Article
  10. The timing of phasic transmitter release is Ca2+-dependent and lacks a direct influence of presynaptic membrane potential.Proceedings of the National Academy of Sciences of the United States of America · 2003
    Article
  11. Article
  12. Article
  13. Neurotransmitter release at fast synapses.The Journal of membrane biology · 1994
    Review
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  15. Article
  16. Article
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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

3 authors.

B HochnerOtto Loewi Center, Department of Neurobiology, Hebrew University, Jerusalem, Israel.
H Parnas
I Parnas

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The discovery that Ca2+ is necessary for the release of neurotransmitter, the primary means by which nerve cells communicate, led to the calcium hypothesis of neutransmitter release, in which release is initiated after an action potential only by an increase in intracellular Ca2+ concentration near the release sites and is terminated (1-2 ms) by the rapid removal of Ca2+. Since then, the calcium-voltage hypothesis has been proposed, in which the depolarization of the presynaptic terminals has two functions. First, in common with the calcium hypothesis, the Ca2+ conductance is increased, thereby permitting Ca2+ entry. Second, a conformational change is induced in a membrane molecule that renders it sensitive to Ca2+, and then binding of Ca2+ to this active form triggers release of neurotransmitter. When the membrane is repolarized, the molecule is inactivated and release is terminated, regardless of the local Ca2+ concentration at that moment. This hypothesis, in contrast to the calcium hypothesis, accounts for the insensitivity of the time course of release to experimental manipulations of intracellular Ca2+ concentration. Furthermore, it explains rapid termination of release after depolarization, even though Ca2+ concentration may still be high. Here we describe experiments that distinguish between these two hypotheses and find that our results support the calcium voltage hypothesis.

Indexed as

Action PotentialsAnimalsAstacoideaCalciumChelating AgentsEgtazic AcidElectric StimulationIn Vitro TechniquesMagnesiumMembrane PotentialsMotor EndplateNeuromuscular JunctionNeurotransmitter AgentsPhotolysisCalciumChelating AgentsEgtazic AcidMagnesiumNeurotransmitter Agentsnitr 5

Identifiers

PMID2573839
OpenAlexW2007973974

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.