Neurotransmitter Release
Neurotransmitter Release - Related Videos
04:13
Imaging Neurotransmitter Release Using Cell-Based Neurotransmitter Fluorescent Engineered Reporters
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2025
Source: Lacin, E., et al. Construction of Cell-based Neurotransmitter Fluorescent Engineered Reporters (CNiFERs) for Optical Detection of Neurotransmitters In Vivo. J. Vis. Exp. (2016)This video demonstrates a technique for imaging neurotransmitter release in vivo using cell-based neurotransmitter fluorescent engineered reporters (CNiFERs), specialized reporter cells pre-injected into the mouse cortex. Positioned under a two-photon microscope, the mouse allows visualization of...
01:21
Drugs Affecting Neurotransmitter Release or Uptake
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2023
Certain drugs can affect how neurotransmitters called catecholamines, are released or taken back up in the adrenergic neuron. They can have different effects on the body's sympathetic transmission. Reserpine, a natural compound found in the Rauwolfia shrub, blocks a transporter called vesicular monoamine transporter (VMAT), which leads to a buildup of catecholamines in the cell and reduces sympathetic transmission. Another drug called guanethidine works in multiple ways, including blocking...
01:20
Antiepileptic Drugs: Modulators of Neurotransmitter Release Mediated by SV2A Protein
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2024
Antiepileptic drugs, such as levetiracetam (Keppra) and brivaracetam (Briviact), have emerged as crucial tools in managing epilepsy. These medications exert their therapeutic effects by targeting the synaptic vesicle protein SV2A, a transmembrane glycoprotein primarily found in the brain. SV2A is a transmembrane glycoprotein located predominantly in the brain, modulating the release of neurotransmitters for neuronal communication. Both levetiracetam and brivaracetam exhibit a high affinity for...
12:19
Live Imaging of Nicotine Induced Calcium Signaling and Neurotransmitter Release Along Ventral Hippocampal Axons
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Cited by 7 •
2015
We developed a gene-chimeric preparation of ventral hippocampal – accumbens circuit in vitro that allows direct live imaging to analyze presynaptic mechanisms of nicotinic acetylcholine receptors (nAChRs) mediated synaptic transmission. This preparation also provides an informative approach to study the pre- and post-synaptic mechanisms of synaptic plasticity.
08:15
Dorsal Root Ganglia Isolation and Primary Culture to Study Neurotransmitter Release
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Cited by 41 •
2018
Dorsal root ganglia (DRG) primary cultures are frequently used to study physiological functions or pathology-related events in sensory neurons. Here, we demonstrate the use of lumbar DRG cultures to detect the release of neurotransmitters after neuropeptide FF receptor type 2 stimulation with a selective agonist.
FAQs
Calcium influx acts as the immediate link between an arriving action potential and vesicle fusion. The action potential opens voltage-gated calcium channels in the presynaptic terminal, allowing calcium to enter. That entry activates the fusion machinery, so specialized proteins can merge synaptic-vesicle and plasma membranes and release the transmitter.
Specialized fusion proteins provide the membrane-fusion step that calcium influx alone does not explain. They enable a synaptic vesicle to merge with the presynaptic plasma membrane, placing its neurotransmitter outside the terminal. This distinction helps separate the trigger, calcium entry, from the physical release event, vesicle fusion.
Signal termination depends on what happens to neurotransmitter after it reaches the synaptic cleft. Reuptake removes molecules from that space, enzymes can degrade them, and diffusion can disperse them. These routes prevent receptor activation from continuing indefinitely and determine how the postsynaptic cell's response is limited after release.
The receiving cell responds when released neurotransmitter binds receptors on its postsynaptic membrane. Receptor binding changes the cell’s electrical activity, extending the effect of a presynaptic event into the next cell. The same communication principle can therefore connect neurons, muscles, or glands, linking synaptic chemistry with varied biological outputs.
To analyze the process conceptually, follow the signal from presynaptic excitation to its outcome. Identify action-potential arrival, calcium-channel opening, calcium entry, vesicle fusion, neurotransmitter movement across the cleft, receptor binding, and the response in the postsynaptic cell. Then examine reuptake, enzymatic degradation, or diffusion to account for signal termination.
It provides a framework for connecting cellular events with larger biological phenomena. At the cellular level, the process reveals how an action potential produces receptor-mediated effects; at broader levels, it supports investigation of neural circuits, behavior, development, and disorders involving synaptic communication. These applications make release a central subject in biology.