Evidence map›Paper›PMID 22851330›Full record

ArticleNeuromolecular medicine2013

Reduction of AP180 and CALM produces defects in synaptic vesicle size and density.

Ronald S Petralia, Ya-Xian Wang, Fred E Indig, Ittai Bushlin, Fangbai Wu, Mark P Mattson, Pamela J Yao

Open access · greenAbstract read
In one paragraph

Article in Neuromolecular medicine, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
1.8field-weighted citation impact, top 17% 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

25 citing papers in PubMed, 37 citations in OpenAlex.

  1. Article
  2. Review
  3. Article
  4. Article
  5. Biogenesis and reformation of synaptic vesicles.The Journal of physiology · 2025
    Review
  6. Article
  7. Cell type-specific functions of Alzheimer's disease endocytic risk genes.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2024
    Review
  8. Review
  9. Article
  10. Article
  11. Article
  12. Review
  13. Article
  14. Article
  15. Review
  16. Article
  17. The Stress-Induced Atf3-Gelsolin Cascade Underlies Dendritic Spine Deficits in Neuronal Models of Tuberous Sclerosis Complex.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2015
    Article
  18. Article
  19. Article
  20. 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 at 1 institution in 1 country.

Ronald S PetraliaAdvanced Imaging Core, NIDCD/NIH, Bethesda, MD 20892, USA.
Ya-Xian Wang
Fred E Indig
Ittai Bushlin
Fangbai Wu
Mark P Mattson
Pamela J Yao
National Institutes of Health · US

Funding

NIA/RRB Confocal Imaging FacilityZICAG000615 · NIA · NATIONAL INSTITUTE ON AGING · PI INDIG, FRED · 2009 to 2025
$17.9M
Advanced Imaging CoreZICDC000081 · NIDCD · NATIONAL INSTITUTE ON DEAFNESS AND OTHER COMMUNICATION DISORDERS · PI WINKLER, DENNIS · 2012 to 2025
$17.4M
Intramural NIH HHS ZIC DC000081
6 · The paper itself

Abstract

Clathrin assembly proteins AP180 and CALM regulate the assembly of clathrin-coated vesicles (CCVs), which mediate diverse intracellular trafficking processes, including synaptic vesicle (SV) recycling at the synapse. Although studies using several invertebrate model systems have indicated a role for AP180 in SV recycling, less is known about AP180's or CALM's function in the synapse of mammalian neurons. In this study, we examined synapses of rat hippocampal neurons in which the level of AP180 or CALM had been reduced by RNA interference (RNAi). Using light microscopy, we visualized synaptic puncta in these AP180- or CALM-reduced neurons by co-expressing Synaptophysin::EGFP (Syp::EGFP). We found that neurons with reduced AP180 or reduced CALM had smaller Syp::EGFP-illuminated puncta. Using electron microscopy, we further examined the ultrastructure of the AP180- or CALM-reduced presynaptic terminals. We found that SVs became variably enlarged in both the AP180-reduced and CALM-reduced presynaptic terminals. Lower AP180 and CALM also reduced the density of SVs and the size of SV clusters. Our findings demonstrate that in the presynaptic terminals of hippocampal neurons, AP180 and CALM have a similar role in regulating synaptic vesicles. This overlapping activity may be necessary for high-precision and high-efficacy SV formation during endocytosis.

Indexed as

AnimalsCells, CulturedClathrin-Coated VesiclesFemaleGenes, ReporterGreen Fluorescent ProteinsHippocampusMicroscopy, ElectronMicroscopy, FluorescenceMonomeric Clathrin Assembly ProteinsNerve Tissue ProteinsPresynaptic TerminalsRatsRats, Sprague-DawleyRNA InterferenceRNA, Small Interferingclathrin assembly protein AP180enhanced green fluorescent proteinGreen Fluorescent ProteinsMonomeric Clathrin Assembly ProteinsNerve Tissue ProteinsPicalm protein, ratRNA, Small InterferingSynaptophysinSyp protein, rat

Identifiers

PMID22851330
PMCPMC3818133
OpenAlexW1964393816

What OpenQuestion holds

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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.