Evidence map›Paper›PMID 22988432›Full record

ArticleFrontiers in neural circuits2012

Entorhinal theta-frequency input to the dentate gyrus trisynaptically evokes hippocampal CA1 LTP.

Jens Stepan, Julien Dine, Thomas Fenzl, Stephanie A Polta, Gregor von Wolff, Carsten T Wotjak, Matthias Eder

Abstract read
In one paragraph

Article in Frontiers in neural circuits, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
–field-weighted citation impact
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

23 citing papers in PubMed.

  1. Hippocampal Mechanisms Support Cortisol-Induced Memory Enhancements.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2023
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  9. Editorial: Synaptic plasticity and dysfunction, friend or foe?Frontiers in synaptic neuroscience · 2023
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  20. Dopamine D1 and D5 receptors modulate spike timing-dependent plasticity at medial perforant path to dentate granule cell synapses.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2014
    Article
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

7 authors.

Jens StepanResearch Group Neuronal Network Dynamics, Max Planck Institute of Psychiatry Munich, Germany.
Julien Dine
Thomas Fenzl
Stephanie A Polta
Gregor von Wolff
Carsten T Wotjak
Matthias Eder

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

There exists substantial evidence that some forms of explicit learning in mammals require long-term potentiation (LTP) at hippocampal CA3-CA1 synapses. While CA1 LTP has been well characterized at the monosynaptic level, it still remains unclear how the afferent systems to the hippocampus can initiate formation of this neuroplastic phenomenon. Using voltage-sensitive dye imaging (VSDI) in a mouse brain slice preparation, we show that evoked entorhinal cortical (EC) theta-frequency input to the dentate gyrus highly effectively generates waves of neuronal activity which propagate through the entire trisynaptic circuit of the hippocampus ("HTC-Waves"). This flow of activity, which we also demonstrate in vivo, critically depends on frequency facilitation of mossy fiber to CA3 synaptic transmission. The HTC-Waves are rapidly boosted by the cognitive enhancer caffeine (5 μM) and the stress hormone corticosterone (100 nM). They precisely follow the rhythm of the EC input, involve high-frequency firing (>100 Hz) of CA3 pyramidal neurons, and induce NMDA receptor-dependent CA1 LTP within a few seconds. Our study provides the first experimental evidence that synchronous theta-rhythmical spiking of EC stellate cells, as occurring during EC theta oscillations, has the capacity to drive induction of CA1 LTP via the hippocampal trisynaptic pathway. Moreover, we present data pointing to a basic filter mechanism of the hippocampus regarding EC inputs and describe a methodology to reveal alterations in the "input-output relationship" of the hippocampal trisynaptic circuit.

Indexed as

caffeinecorticosteroneentorhinal cortexhippocampusLTPthetatrisynaptic circuitvoltage-sensitive dye

Identifiers

PMID22988432
PMCPMC3439738

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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.