Evidence map›Paper›PMID 32814795›Full record

ArticleScientific reports2020

Estimation of the number of synapses in the hippocampus and brain-wide by volume electron microscopy and genetic labeling.

Andrea Santuy, Laura Tomás-Roca, José-Rodrigo Rodríguez, Juncal González-Soriano, Fei Zhu, Zhen Qiu, Seth G N Grant, Javier DeFelipe, Angel Merchan-Perez

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed
4.3field-weighted citation impact, top 4% 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

40 citing papers in PubMed, 70 citations in OpenAlex.

  1. Does a monoclonal antibody targeting immune cells affect glutamatergic level in schizophrenia? A multimodal PET/MRS brain imaging study.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2026
    Trial
  2. Dendritic morphology and synaptic nonlinearities enhance functional complexity in human cortical neurons.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
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  13. Synaptic Vesicle Glycoprotein 2A Knockout in Parvalbumin and Somatostatin Interneurons Drives Seizures in the Postnatal Mouse Brain.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
    Article
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  17. Bioorthogonal chemical labeling of endogenous neurotransmitter receptors in living mouse brains.Proceedings of the National Academy of Sciences of the United States of America · 2024
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  18. 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

9 authors at 5 institutions in 2 countries.

Andrea SantuyLaboratorio Cajal de Circuitos Corticales, Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, 28223, Pozuelo de Alarcón, Madrid, Spain.
Laura Tomás-RocaGenes to Cognition Program, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, EH16 4SB, UK.
José-Rodrigo RodríguezLaboratorio Cajal de Circuitos Corticales, Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, 28223, Pozuelo de Alarcón, Madrid, Spain.
Juncal González-SorianoDepartamento de Anatomía y Embriología, Universidad Complutense de Madrid, 28040, Madrid, Spain.
Fei ZhuGenes to Cognition Program, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, EH16 4SB, UK.
Zhen QiuGenes to Cognition Program, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, EH16 4SB, UK.
Seth G N GrantGenes to Cognition Program, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, EH16 4SB, UK.
Javier DeFelipeLaboratorio Cajal de Circuitos Corticales, Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, 28223, Pozuelo de Alarcón, Madrid, Spain.
Angel Merchan-PerezLaboratorio Cajal de Circuitos Corticales, Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, 28223, Pozuelo de Alarcón, Madrid, Spain. angel.merchan@upm.es.
Universidad Politécnica de Madrid · ESUniversity of Edinburgh · GBInstituto Cajal · ESUniversidad Complutense de Madrid · ESUniversity College London · GB

Funding

Wellcome Trust
6 · The paper itself

Abstract

Determining the number of synapses that are present in different brain regions is crucial to understand brain connectivity as a whole. Membrane-associated guanylate kinases (MAGUKs) are a family of scaffolding proteins that are expressed in excitatory glutamatergic synapses. We used genetic labeling of two of these proteins (PSD95 and SAP102), and Spinning Disc confocal Microscopy (SDM), to estimate the number of fluorescent puncta in the CA1 area of the hippocampus. We also used FIB-SEM, a three-dimensional electron microscopy technique, to calculate the actual numbers of synapses in the same area. We then estimated the ratio between the three-dimensional densities obtained with FIB-SEM (synapses/µm

Indexed as

AnimalsBrainDisks Large Homolog 4 ProteinGuanylate KinasesHippocampusMaleMembrane ProteinsMiceMice, KnockoutMicroscopy, ElectronSynapsesDisks Large Homolog 4 ProteinDlg4 protein, mouseDlgh3 protein, mouseGuanylate KinasesMembrane Proteins

Identifiers

PMID32814795
PMCPMC7438319
OpenAlexW3056286017

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.