Evidence map›Paper›PMID 9882749›Full record

ArticleThe Journal of physiology1999

Presynaptic effects of muscarine on ACh release at the frog neuromuscular junction.

I Slutsky, H Parnas, I Parnas

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 33 papers.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed
1.3field-weighted citation impact, top 21% 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

33 citing papers in PubMed, 87 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Review
  5. Article
  6. Review
  7. Article
  8. Review
  9. Effects of neuromuscular presynaptic muscarinic MClinical and experimental pharmacology & physiology · 2018
    Article
  10. Article
  11. Review
  12. Article
  13. Review
  14. Article
  15. Article
  16. Muscarinic inhibition of nicotinic transmission in rat sympathetic neurons and adrenal chromaffin cells.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2015
    Article
  17. Article
  18. Article
  19. Article
  20. 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

3 authors at 1 institution in 1 country.

I SlutskyThe Otto Loewi Minerva Center for Cellular and Molecular Neurobiology, Department of Neurobiology, The Hebrew University, Jerusalem, Israel.
H Parnas
I Parnas
Hebrew University of Jerusalem · IL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

1. Presynaptic effects of muscarine on neurotransmitter release were studied at the frog neuromuscular junction, using focal depolarization of the presynaptic terminal to different levels. 2. Muscarine (10 microM) had a dual effect on ACh release: concomitant inhibition and enhancement of release at the same patch of presynaptic membrane. 3. These two effects were maximal at low depolarizing pulses and diminished as depolarization increased. 4. At low depolarizing pulses, atropine (1 microM) enhanced release, suggesting that ACh in the synaptic cleft causes a net tonic inhibition of ACh release. 5. In the presence of the M2 antagonist methoctramine (1 microM), muscarine (10 microM) enhanced ACh release. 6. In the presence of the M1 antagonist pirenzepine (10 microM), muscarine (10 microM) produced stronger inhibition. 7. These results show that the M2 receptor is responsible for inhibition of ACh release, while the M1 receptor is responsible for its enhancement. 8. The inhibitory effect of muscarine did not depend on extracellular [Ca2+]. Enhancement of release was abolished at low extracellular [Ca2+]. 9. The muscarine inhibitory effect was not associated with a reduction of Ca2+ current, while release enhancement was associated with an increase of Ca2+ current.

Indexed as

AcetylcholineAnimalsAtropineCalcium ChannelsIn Vitro TechniquesMembrane PotentialsMuscarineMuscarinic AgonistsMuscarinic AntagonistsNeuromuscular JunctionPatch-Clamp TechniquesRana ridibundaReceptors, PresynapticAcetylcholineAtropineCalcium ChannelsMuscarineMuscarinic AgonistsMuscarinic AntagonistsReceptors, Presynaptic

Identifiers

PMID9882749
PMCPMC2269098
OpenAlexW1988420297

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.