Fm Dye Unloading
Fm Dye Unloading - Related Videos
02:43
Microelectrode-Mediated FM Dye Loading and Unloading in Drosophila Larvae Nerve Cells
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2025
In this video, Drosophila larvae nerve fibers are immersed in FM dye, which binds to cell membrane lipids. Suction microelectrode and electrical pulses stimulate the endocytosis process, incorporating the FM dye into newly formed endocytic vesicles. This method, which visualizes presynaptic stages of neurotransmission, is useful for studying synaptic function and neurotransmitter release.
09:50
An Alternant Method to the Traditional NASA Hindlimb Unloading Model in Mice
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Cited by 55 •
2011
We developed an alternant hindlimb unloading model in mice. The primary advantage of our hindlimb unloading tail-ring method over the conventional Morey-Holton tail-traction technique is a simple straightforward procedure that minimizes stress upon the animal.
08:36
FM Dyes in Vesicle Recycling
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2023
FM dyes are a class of fluorescent molecules that has found important use in studying the vesicle recycling process. By virtue of a chemical structure, these molecules can insert themselves into the outer leaflet of phospholipid bilayer membranes. After membrane insertion, they are internalized into the cell via endocytosed vesicles, and released when these vesicles recycle back to the membrane. Since, these dyes fluoresce strongly in the hydrophobic environment within membranes and weakly in...
02:42
Analyzing Synaptic Vesicle Recycling and Fluorescent Dye Uptake in Drosophila Larvae
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2025
This video demonstrates a protocol to study synaptic vesicle recycling at neuromuscular junctions in channelrhodopsin-expressing Drosophila larvae using a fluorescent dye. Blue light activates the channelrhodopsins, causing calcium influx and synaptic vesicle exocytosis. The dye integrates into the neuronal membranes and is internalized during endocytosis, resulting in enhanced fluorescence. Further blue light stimulation induces exocytosis and dye release, which is shown by reduced...
01:21
Three-Phase Short Circuit—Unloaded Synchronous Machine
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2024
Conducting a three-phase short circuit test on an unloaded synchronous machine helps understand its impact on the system. The AC fault current's oscillogram, with the DC offset removed, reveals that the waveform amplitude decreases from an initially high value to a steady-state level for one phase of the machine. This behavior occurs due to the magnetic flux produced by the short-circuit armature currents. Initially, these currents follow high-reluctance paths but eventually shift to...
FAQs
Amphipathic styryl dyes associate with synaptic vesicle membranes when endocytosis retrieves membrane from the neuronal surface. Subsequent vesicle fusion with the plasma membrane exposes the labeled membrane to the surrounding environment, allowing dye release and producing a decrease in fluorescence. This coupling between membrane cycling and signal loss makes fluorescence changes a readout of presynaptic vesicle traffic.
The rate of fluorescence loss provides information about how readily labeled vesicles undergo fusion after stimulation, whereas the extent of loss reflects the amount of labeled material released. Together, these measurements can indicate differences in release probability and synaptic vesicle pool dynamics, helping researchers compare neurotransmission across experimental conditions.
Researchers can compare fluorescence unloading during different patterns or conditions of neuronal stimulation to evaluate changes in presynaptic performance over short time scales. Differences in the speed or magnitude of signal loss can reveal altered release behavior and vesicle pool use, providing a way to characterize short-term plasticity and activity-dependent changes in neurotransmission.
A typical workflow first allows FM dye labeling during synaptic vesicle endocytosis. The labeled neurons are then stimulated to trigger vesicle fusion, while fluorescence is monitored over time. Researchers quantify the resulting decline in signal and relate its rate and magnitude to vesicle release, recycling behavior, release probability, or synaptic vesicle pool dynamics.
Fm dye unloading supports comparisons between experimental conditions that may alter presynaptic function, provided the resulting fluorescence changes are measured consistently. Researchers can examine whether stimulation produces different unloading rates or extents across conditions, then assess corresponding changes in release probability, vesicle pool dynamics, or overall neurotransmission. This makes the method useful for studying activity-dependent synaptic differences.
Fluorescence unloading measurements can help characterize how synaptic vesicles participate in neurotransmission, including the probability of release and the behavior of vesicle pools during stimulation. In neuroscience research, these outcomes support analysis of presynaptic function, synaptic activity, and short-term plasticity, especially when researchers need to compare how different conditions influence vesicle cycling.