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Related Concept Videos

Synaptic Signaling01:12

Synaptic Signaling

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Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
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Synaptic Signaling01:09

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Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
The presynaptic neuron fires an action potential that...
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Autophagy01:27

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Glycolysis is divided into two phases based on whether energy is utilized or released. While the first phase consumes ATP, the second phase produces energy in the form of ATP and NADH. The energy is released over a sequence of reactions that turns G3P into pyruvate. The energy-releasing phase—steps 6-10 of glycolysis—occurs twice, once for each of the two 3-carbon sugars produced during steps 1-5 of the first phase.
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Integration of Synaptic Events01:28

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Synaptic integration mainly includes the summation of graded potentials. Graded potentials, regardless of their type, cause subtle alterations in membrane voltage, resulting in either depolarization or hyperpolarization. These incremental changes, when combined or summed, can propel the neuron toward its threshold. Consider, for example, a membrane experiencing a +15 mV shift, causing it to depolarize from -70 mV to -55 mV. In this scenario, graded potentials govern the membrane's ability to...
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ATP Energy Storage and Release01:31

ATP Energy Storage and Release

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ATP is a highly unstable molecule. Unless quickly used to perform work, ATP spontaneously dissociates into ADP and inorganic phosphate (Pi), and the free energy released during this process is lost as heat. The energy released by ATP hydrolysis is used to perform work inside the cell and depends on a strategy called energy coupling. Cells couple the exergonic reaction of ATP hydrolysis with endergonic reactions, allowing them to proceed.
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Interdependency Between Autophagy and Synaptic Vesicle Trafficking: Implications for Dopamine Release.

Fiona Limanaqi1, Francesca Biagioni2, Stefano Gambardella2

  • 1Human Anatomy, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy.

Frontiers in Molecular Neuroscience
|September 7, 2018
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Summary
This summary is machine-generated.

Cellular clearing systems like autophagy regulate neurotransmission by managing synaptic proteins and vesicles. Impaired autophagy disrupts dopamine signaling, impacting neurological and psychiatric disorders.

Keywords:
Munc13RabGTPaseSNAREcell-clearing systemsendosomeexosomemTORretromer

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Area of Science:

  • Cellular Biology
  • Neuroscience

Background:

  • Autophagy (ATG) and Ubiquitin Proteasome (UP) are key cellular degradation systems.
  • Emerging evidence suggests ATG and UP regulate neurotransmission by controlling synaptic vesicle (SV) protein turnover.

Purpose of the Study:

  • To explore the role of cellular clearing systems, particularly autophagy, in modulating neurotransmission.
  • To investigate the link between impaired autophagy-lysosomal machinery and synaptic dysfunction, with a focus on dopamine (DA) neurotransmission.

Main Methods:

  • Review of existing evidence on autophagy, proteasome function, and synaptic regulation.
  • Focus on studies linking secretory and trafficking pathway dysregulation to autophagy impairment.
  • Examination of autophagy's specific role in dopamine neurotransmission and SVs.

Main Results:

  • Autophagy and proteasome function as critical modulators of neurotransmission, influencing SVs and related proteins.
  • Dysregulation of secretory and trafficking pathways often accompanies impaired autophagy-lysosomal function, leading to synaptic dysfunction.
  • Autophagy plays a crucial role in surveilling dopamine neurotransmission by clearing harmful proteins and managing synaptic DA vesicles.

Conclusions:

  • Cellular clearing systems and secretory pathways function as an integrated system regulating synaptic homeostasis.
  • Impaired autophagy is implicated in synaptic dysfunction and is particularly relevant to dopamine-related neurological and psychiatric disorders.
  • Autophagy's role in degrading potentially harmful proteins and managing synaptic vesicles highlights its significance in maintaining dopamine neurotransmission.