Evidence map›Paper›PMID 26126868›Full record

ArticleJournal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism2015

Tissue-type plasminogen activator triggers the synaptic vesicle cycle in cerebral cortical neurons.

Fang Wu, Enrique Torre, David Cuellar-Giraldo, Lihong Cheng, Hong Yi, Edyta K Bichler, Paul S García, Manuel Yepes

Open access · bronzeAbstract read
In one paragraph

Article in Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
2.5field-weighted citation impact, top 12% 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

21 citing papers in PubMed, 31 citations in OpenAlex.

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  12. Tissue-type plasminogen activator protects the postsynaptic density in the ischemic brain.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2018
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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

8 authors at 2 institutions in 1 country.

Fang WuDepartment of Neurology, Center for Neurodegenerative Disease, Emory University School of Medicine, Atlanta, Georgia, USA.
Enrique TorreDepartment of Neurology, Center for Neurodegenerative Disease, Emory University School of Medicine, Atlanta, Georgia, USA.
David Cuellar-GiraldoDepartment of Neurology, Center for Neurodegenerative Disease, Emory University School of Medicine, Atlanta, Georgia, USA.
Lihong ChengDepartment of Neurology, Center for Neurodegenerative Disease, Emory University School of Medicine, Atlanta, Georgia, USA.
Hong YiApkarian Integrated Electron Microscopy Core, Emory University School of Medicine, Atlanta, Georgia, USA.
Edyta K BichlerDepartment of Anesthesiology, Veterans Affairs Medical Center, Atlanta, Georgia, USA.
Paul S GarcíaDepartment of Anesthesiology, Veterans Affairs Medical Center, Atlanta, Georgia, USA.
Manuel YepesDepartment of Neurology, Center for Neurodegenerative Disease, Emory University School of Medicine, Atlanta, Georgia, USA.
Emory University · USVeterans Health Administration · US

Funding

Urokinase-type Plasminogen Activator in the Ischemic BrainR01NS091201 · NINDS · EMORY UNIVERSITY · PI YEPES, MANUEL SALVADOR · 2015 to 2022
$2.7M
tPA is a Neuroprotectant in the Ischemic BrainR01NS079331 · NINDS · EMORY UNIVERSITY · PI YEPES, MANUEL SALVADOR · 2013 to 2017
$1.7M
Effects of Antiretrovirals on Neuronal Health: Screening ARVs for NeurotoxicityIK2BX001677 · VA · VETERANS HEALTH ADMINISTRATION · PI GARCIA, PAUL S · 2014 to 2018
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BLRD VA IK2 BX001677NCRR NIH HHS 1 S10 RR02567901NINDS NIH HHS NS-079331NINDS NIH HHS R01 NS079331NINDS NIH HHS R01 NS091201
6 · The paper itself

Abstract

The active zone (AZ) is a thickening of the presynaptic membrane where exocytosis takes place. Chemical synapses contain neurotransmitter-loaded synaptic vesicles (SVs) that at rest are tethered away from the synaptic release site, but after the presynaptic inflow of Ca(+2) elicited by an action potential translocate to the AZ to release their neurotransmitter load. We report that tissue-type plasminogen activator (tPA) is stored outside the AZ of cerebral cortical neurons, either intermixed with small clear-core vesicles or in direct contact with the presynaptic membrane. We found that cerebral ischemia-induced release of neuronal tPA, or treatment with recombinant tPA, recruits the cytoskeletal protein βII-spectrin to the AZ and promotes the binding of SVs to βII-spectrin, enlarging the population of SVs in proximity to the synaptic release site. This effect does not require the generation of plasmin and is followed by the recruitment of voltage gated calcium channels (VGCC) to the presynaptic terminal that leads to Ca(+2)-dependent synapsin I phosphorylation, freeing SVs to translocate to the AZ to deliver their neurotransmitter load. Our studies indicate that tPA activates the SV cycle and induces the structural and functional changes in the synapse that are required for successful neurotransmission.

Indexed as

Action PotentialsAnimalsBrain IschemiaCalcium ChannelsCells, CulturedCerebral CortexExocytosisFibrinolysinImmunohistochemistryMaleNeuronsPhosphorylationPresynaptic TerminalsProteomicsRatsRats, Sprague-DawleyCalcium ChannelsFibrinolysinSpectrinSynapsinsTissue Plasminogen Activator

Identifiers

PMID26126868
PMCPMC4671117
OpenAlexW1587824908

What OpenQuestion holds

Textmetadata
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.