Evidence map›Paper›PMID 9535977›Full record

ArticleJournal of neurophysiology1998

L-Type calcium channels are required for one form of hippocampal mossy fiber LTP.

A Kapur, M F Yeckel, R Gray, D Johnston

Abstract read
In one paragraph

Article in Journal of neurophysiology, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 59 papers.

0numbers the graph read from it
0cells of the map it votes in
59citing papers in PubMed
16.4field-weighted citation impact, top 1% 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

59 citing papers in PubMed, 155 citations in OpenAlex.

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  17. Review
  18. Presynaptic long-term plasticity.Frontiers in synaptic neuroscience · 2013
    Review
  19. Review
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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

4 authors at 1 institution in 1 country.

A KapurDivision of Neuroscience, Baylor College of Medicine, Houston, Texas 77030, USA.
M F Yeckel
R Gray
D Johnston
Baylor College of Medicine · US

Funding

CELLULAR INFORMATION PROCESSING IN THE HIPPOCAMPUSR01MH048432 · NIMH · UNIVERSITY OF TEXAS AUSTIN · PI JOHNSTON, DANIEL · 1991 to 2012
$3.8M
PHARMACOLOGY OF MOSSY FIBER SYNAPTIC PLASTICITYR37MH044754 · NIMH · UNIVERSITY OF TEXAS AUSTIN · PI JOHNSTON, DANIEL · 1989 to 2008
$3.2M
ACTIVE PROPERTIES OF DENDRITES OF CA3 PYRAMIDAL NEURONSF32MH011390 · NIMH · BAYLOR COLLEGE OF MEDICINE · PI YECKEL, MARK F · 1996 to 1998
–
MEMBRANE AND SYNAPTIC MECHANISMS IN EPILEPTOGENESISP01NS011535 · NINDS · BAYLOR COLLEGE OF MEDICINE · PI KELLAWAY, PETER A · 1993 to 1997
–
TIME MODULATION OF EPILEPTIC ACITVITY IN THE BRAINP50NS011535 · NINDS · BAYLOR COLLEGE OF MEDICINE · PI KELLAWAY, PETER A · 1985 to 1991
–
NIMH NIH HHS F32 MH011390NIMH NIH HHS MH-44754NIMH NIH HHS MH-48432NIMH NIH HHS R01 MH048432NIMH NIH HHS R37 MH044754NINDS NIH HHS NS-11535
6 · The paper itself

Abstract

The requirement of postsynaptic calcium influx via L-type channels for the induction of long-term potentiation (LTP) of mossy fiber input to CA3 pyramidal neurons was tested for two different patterns of stimulation. Two types of LTP-inducing stimuli were used based on the suggestion that one of them, brief high-frequency stimulation (B-HFS), induces LTP postsynaptically, whereas the other pattern, long high-frequency stimulation (L-HFS), induces mossy fiber LTP presynaptically. To test whether or not calcium influx into CA3 pyramidal neurons is necessary for LTP induced by either pattern of stimulation, nimodipine, a L-type calcium channel antagonist, was added during stimulation. In these experiments nimodipine blocked the induction of mossy fiber LTP when B-HFS was given [34 +/- 5% (mean +/- SE) increase in control versus 7 +/- 4% in nimodipine, P < 0.003]; in contrast, nimodipine did not block the induction of LTP with L-HFS (107 +/- 10% in control vs. 80 +/- 9% in nimodipine, P > 0.05). Administration of nimodipine after the induction of LTP had no effect on the expression of LTP. In addition, B- and L-HFS delivered directly to commissural/associational fibers in stratum radiatum failed to induce a N-methyl--aspartate-independent form of LTP, obviating the possibility that the presumed mossy fiber LTP resulted from potentiation of other synapses. Nimodipine had no effect on calcium transients recorded from mossy fiber presynaptic terminals evoked with the B-HFS paradigm but reduced postsynaptic calcium transients. Our results support the hypothesis that induction of mossy fiber LTP by B-HFS is mediated postsynaptically and requires entry of calcium through L-type channels into CA3 neurons.

Indexed as

AnimalsCalcium Channel BlockersCalcium ChannelsElectric StimulationExcitatory Postsynaptic PotentialsIn Vitro TechniquesLong-Term PotentiationMaleMossy Fibers, HippocampalNimodipinePresynaptic TerminalsPyramidal CellsRatsRats, Sprague-DawleyCalcium Channel BlockersCalcium ChannelsNimodipine

Identifiers

PMID9535977
PMCPMC2874953
OpenAlexW73178129

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.