Evidence map›Paper›PMID 19279571›Full record

ArticleNature2009

Compound vesicle fusion increases quantal size and potentiates synaptic transmission.

Liming He, Lei Xue, Jianhua Xu, Benjamin D McNeil, Li Bai, Ernestina Melicoff, Roberto Adachi, Ling-Gang Wu

Open access · greenAbstract read
In one paragraph

Article in Nature, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 79 papers.

0numbers the graph read from it
0cells of the map it votes in
79citing papers in PubMed
6.2field-weighted citation impact, top 3% 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

79 citing papers in PubMed, 128 citations in OpenAlex.

  1. Article
  2. Article
  3. Membrane Merger Dynamics in Exocytosis and Endocytosis.Advances in experimental medicine and biology · 2026
    Review
  4. Article
  5. Ultrastructural membrane dynamics of mouse and human cortical synapses.bioRxiv : the preprint server for biology · 2025
    Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Review
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Article

19 more citing papers are in PubMed but not listed here.

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

8 authors at 3 institutions in 1 country.

Liming HeNational Institute of Neurological Disorders and Stroke, 35 Convent Drive, Building 35, Room 2B-1012, Bethesda, Maryland 20892, USA.
Lei Xue
Jianhua Xu
Benjamin D McNeil
Li Bai
Ernestina Melicoff
Roberto Adachi
Ling-Gang Wu
National Institutes of Health · USNational Institute of Neurological Disorders and Stroke · USThe University of Texas MD Anderson Cancer Center · US

Funding

Synaptic Vesicle ExocytosisZIANS003009 · NINDS · NATIONAL INSTITUTE OF NEUROLOGICAL DISORDERS AND STROKE · PI WU, LING GANG · 2009 to 2025
$31.2M
Intramural NIH HHS Z99 NS999999
6 · The paper itself

Abstract

Exocytosis at synapses involves fusion between vesicles and the plasma membrane. Although compound fusion between vesicles was proposed to occur at ribbon-type synapses, whether it exists, how it is mediated, and what role it plays at conventional synapses remain unclear. Here we report the existence of compound fusion, its underlying mechanism, and its role at a nerve terminal containing conventional active zones in rats and mice. We found that high potassium application and high frequency firing induced giant capacitance up-steps, reflecting exocytosis of vesicles larger than regular ones, followed by giant down-steps, reflecting bulk endocytosis. These intense stimuli also induced giant vesicle-like structures, as observed with electron microscopy, and giant miniature excitatory postsynaptic currents (mEPSCs), reflecting more transmitter release. Calcium and its sensor for vesicle fusion, synaptotagmin, were required for these giant events. After high frequency firing, calcium/synaptotagmin-dependent mEPSC size increase was paralleled by calcium/synaptotagmin-dependent post-tetanic potentiation. These results suggest a new route of exocytosis and endocytosis composed of three steps. First, calcium/synaptotagmin mediates compound fusion between vesicles. Second, exocytosis of compound vesicles increases quantal size, which increases synaptic strength and contributes to the generation of post-tetanic potentiation. Third, exocytosed compound vesicles are retrieved via bulk endocytosis. We suggest that this vesicle cycling route be included in models of synapses in which only vesicle fusion with the plasma membrane is considered.

Indexed as

AnimalsCalciumExcitatory Postsynaptic PotentialsExocytosisMiceRatsRats, WistarSynaptic TransmissionSynaptic VesiclesSynaptotagmin IICalciumSynaptotagmin IISYT2 protein, human

Identifiers

PMID19279571
PMCPMC2768540
OpenAlexW1968107963

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.