Evidence map›Paper›PMID 19521540›Full record

ArticleFrontiers in neural circuits2009

Live imaging of synaptic vesicle release and retrieval in dopaminergic neurons.

Meera Mani, Timothy A Ryan

Open access · goldAbstract read
In one paragraph

Article in Frontiers in neural circuits, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 1 pooled it
1.5field-weighted citation impact, top 22% 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

24 citing papers in PubMed, 1 synthesis or guideline pooled it, 44 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Review
  5. A fluorescent nanosensor paint detects dopamine release at axonal varicosities with high spatiotemporal resolution.Proceedings of the National Academy of Sciences of the United States of America · 2022
    Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Dopamine Autoxidation Is Controlled by Acidic pH.Frontiers in molecular neuroscience · 2018
    Article
  11. Parkinson's Disease-Associated LRRK2 Hyperactive Kinase Mutant Disrupts Synaptic Vesicle Trafficking in Ventral Midbrain Neurons.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2017
    Article
  12. Unique pH dynamics in GABAergic synaptic vesicles illuminates the mechanism and kinetics of GABA loading.Proceedings of the National Academy of Sciences of the United States of America · 2016
    Article
  13. Article
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  19. 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

2 authors at 1 institution in 1 country.

Meera ManiDepartment of Biochemistry, Weill Medical College of Cornell University New York, NY, USA.
Timothy A Ryan
Tri-Institutional PhD Program in Chemical Biology · US

Funding

Weill Cornell/Rockefeller/Sloan-Kettering MST ProgramT32GM007739 · NIGMS · WEILL MEDICAL COLL OF CORNELL UNIV · PI HSU, KATHARINE C · 1985 to 2023
$51.1M
The Presynaptic Vesicle Cycle for the Slow Acting Neurotransmitter SecretionP01DA010154 · NIDA · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI KREITZER, ANATOL, SULZER, DAVID · 1995 to 2016
$14.7M
Physiology of Single Synaptic CNS TerminalsR01NS036942 · NINDS · WEILL MEDICAL COLL OF CORNELL UNIV · PI Timothy Aidan Ryan · 1998 to 2026
$6.8M
Physiology of Single Synaptic CNS TerminalsR37NS036942 · NINDS · WEILL MEDICAL COLL OF CORNELL UNIV · PI RYAN, TIMOTHY AIDAN · 2016 to 2022
$3.5M
NIDA NIH HHS P01 DA010154NIGMS NIH HHS T32 GM007739NINDS NIH HHS R01 NS036942NINDS NIH HHS R37 NS036942
6 · The paper itself

Abstract

Dopaminergic (DA) neurons represent <0.01% of neurons in the human brain, but are essential for normal neurological and psychiatric function. The majority of these neurons reside in the ventral midbrain, but they exert their profound influences on brain function through projections to both the cortex and the basal ganglia. These projections secrete dopamine from small clear synaptic vesicles (SVs) in axonal varicosities. DA signaling has unique spatial and temporal characteristics as compared to the fast, focal synaptic transmission of excitatory and inhibitory neurons. However, as with fast-acting neurotransmitters, DA SVs must be locally recycled for use following exocytosis. Little is known about these DA SV recycling properties and how they might impact efficacy of DA neurotransmission. Here we used the pH-sensitive fluorescent probe synaptopHluorin to investigate SV recycling in DA neurons and compared their properties to prototypical fast neurotransmitter synapses of the hippocampus. These measurements showed that DA SVs, like hippocampal SVs, have a resting pH of approximately 5.6. However, compared to hippocampal neurons, DA neurons show limited depletion of the recycling pool of vesicles as the stimulus frequency is increased from 5 to 30 Hz. Additional measurements show that exocytosis rates at this frequency are comparable between hippocampal and DA neurons. Thus, limited vesicle depletion likely arises from a stimulus frequency-dependent acceleration of DA SV endocytosis or re-acidification. Our observations imply differential regulation of endocytic-exocytic balance in DA neurons. Finally, our assay can also be used to investigate the effects of genetic and chemical modulation of the SV cycle.

Indexed as

dopamineendocytosisexocytosisrecyclingsynaptic vesicle

Identifiers

PMID19521540
PMCPMC2694661
OpenAlexW1989640899

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.