Evidence map›Paper›PMID 21068332›Full record

ArticleThe Journal of neuroscience : the official journal of the Society for Neuroscience2010

Gap junction expression is required for normal chemical synapse formation.

Krista L Todd, William B Kristan, Kathleen A French

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of neuroscience : the official journal of the Society for Neuroscience, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers.

0numbers the graph read from it
0cells of the map it votes in
38citing papers in PubMed
2.8field-weighted citation impact, top 9% 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

38 citing papers in PubMed, 76 citations in OpenAlex.

  1. Circuit-constrained molecular neuroethology in the medicinal leech Hirudo verbana.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2026
    Review
  2. Article
  3. Electrical Synapses Mediate Embryonic Hyperactivity in a Zebrafish Model of Fragile X Syndrome.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2024
    Article
  4. Review
  5. Article
  6. Article
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  8. Astrocyte-Neuron Signaling in Synaptogenesis.Frontiers in cell and developmental biology · 2021
    Review
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  10. Review
  11. Review
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  13. Article
  14. Review
  15. Article
  16. NeonatalProceedings of the National Academy of Sciences of the United States of America · 2017
    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 at 1 institution in 1 country.

Krista L ToddDivision of Biology, Neurobiology Section, University of California, San Diego, La Jolla, California 92093, USA. kltodd@ucsd.edu
William B Kristan
Kathleen A French
University of California, San Diego · US

Funding

VENOM NEUTRALIZATIONS06GM008107 · NIGMS · TEXAS A&M UNIVERSITY-KINGSVILLE · PI MASSA, ENRIQUE · 1989 to 2010
$5.1M
NEUROSCIENCES CONTROL OF INTERACTIONS AMONG BEHAVIORSR01MH043396 · NIMH · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI KRISTAN, WILLIAM B · 1988 to 2013
$3.9M
Systems and Integrative Neurobiology Training GrantT32GM008107 · NIGMS · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI KRISTAN, WILLIAM B · 1985 to 2007
$2.7M
DEVELOPMENT OF NEURONAL CIRCUITS FOR SIMPLE BEHAVIORSR01NS035336 · NINDS · UNIVERSITY OF CALIFORNIA SAN DIEGO · PI KRISTAN, WILLIAM B · 1997 to 2004
$1.6M
NIGMS NIH HHS GM08107NIGMS NIH HHS S06 GM008107NIGMS NIH HHS T32 GM008107NIMH NIH HHS MH43396NIMH NIH HHS R01 MH043396NINDS NIH HHS NS35336NINDS NIH HHS R01 NS035336
6 · The paper itself

Abstract

Electrical and chemical synapses provide two distinct modes of direct communication between neurons, and the embryonic development of the two is typically not simultaneous. Instead, in both vertebrates and invertebrates, gap junction-based electrical synapses arise before chemical synaptogenesis, and the early circuits composed of gap junction-based electrical synapses resemble those produced later by chemical synapses. This developmental sequence from electrical to chemical synapses has led to the hypothesis that, in developing neuronal circuits, electrical junctions are necessary forerunners of chemical synapses. Up to now, it has been difficult to test this hypothesis directly, but we can identify individual neurons in the leech nervous system from before the time when synapses are first forming, so we could test the hypothesis. Using RNA interference, we transiently reduced gap junction expression in individual identified neurons during the 2-4 d when chemical synapses normally form. We found that the expected chemical synapses failed to form on schedule, and they were still missing months later when the nervous system was fully mature. We conclude that the formation of gap junctions between leech neurons is a necessary step in the formation of chemical synaptic junctions, confirming the predicted relation between electrical synapses and chemical synaptogenesis.

Indexed as

Analysis of VarianceAnimalsElectrophysiologyExcitatory Postsynaptic PotentialsGap JunctionsIn Situ HybridizationLeechesNeuronsSynapses

Identifiers

PMID21068332
PMCPMC3478946
OpenAlexW1985113794

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.