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The Mouse Forced Swim Test
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The tortoise and the hare revisited.

Natalia L Kononenko1, Arndt Pechstein, Volker Haucke

  • 1is in the Department of Molecular Pharmacology and Cell Biology , Leibniz Institut für Molekulare Pharmakologie (FMP) and Neurocure Cluster of Excellence, Charité Universitätsmedizin Berlin , Berlin , Germany Kononenko@fmp-berlin.de.

Elife
|September 10, 2013
PubMed
Summary

Optogenetics and electron microscopy revealed an ultrafast synaptic vesicle recycling mechanism. This finding challenges long-held models of neurotransmission, offering new insights into neuronal function.

Keywords:
C. elegansactive zonehigh-pressure freezingoptogeneticssynaptic vesicle endocytosissynaptic vesicle exocytosistime-resolved electron microscopy

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Biophysics

Background:

  • Synaptic vesicle recycling is crucial for neurotransmission.
  • Existing models propose slower recycling mechanisms.
  • A 40-year controversy exists regarding the speed of vesicle recycling.

Purpose of the Study:

  • To investigate the temporal dynamics of synaptic vesicle recycling.
  • To resolve the long-standing debate on recycling speed.
  • To uncover novel mechanisms of synaptic function.

Main Methods:

  • Utilized optogenetics for precise temporal control of neuronal activity.
  • Employed high-resolution electron microscopy to visualize synaptic structures.
  • Combined both techniques to capture ultrafast events.

Main Results:

  • Observed an ultrafast mode of synaptic vesicle recycling.
  • Demonstrated recycling occurring on a timescale faster than previously thought.
  • Provided direct visualization of the rapid recycling process.

Conclusions:

  • The study reveals a novel, rapid pathway for synaptic vesicle recycling.
  • Findings necessitate a revision of current understanding of synaptic transmission.
  • This work opens new avenues for research into neuronal plasticity and disorders.