Vesicle Motility Quantification
Vesicle Motility Quantification - Related Videos
08:15
Quantification of Endosome and Lysosome Motilities in Cultured Neurons Using Fluorescent Probes
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Cited by 6 •
2017
The investigation of membrane trafficking is crucial for understanding neuronal functions. Here, we introduce a method for quantifying vesicle motility in neurons. This is a convenient method that can be adapted to the quantification of membrane trafficking in the nervous system.
07:35
Preparation, Imaging, and Quantification of Bacterial Surface Motility Assays
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Cited by 68 •
2015
Swarming motility is influenced by physical and environmental factors. We describe a two-phase protocol and guidelines to circumvent the challenges commonly associated with swarm assay preparation and data collection. A macroscopic imaging technique is employed to obtain detailed information on swarm behavior that is not provided by current analysis techniques.
03:45
Visualization of Vesicle Motilities in Neurons Using Fluorescence Imaging
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2025
This video demonstrates how neuronal vesicles are labeled with specific fluorescent proteins to visualize their movement. First, a plasmid coding for a fluorescent protein is incubated with a transfection agent and then introduced into a culture of neurons. Subsequently, images of the neurons are acquired and analyzed to track the vesicles' movement.
07:33
Quantification of Acanthamoeba spp. Motility
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Cited by 2 •
2024
This procedure describes how to visualize, track, and quantify Acanthamoeba spp. motility.
12:01
Quantification and Size-profiling of Extracellular Vesicles Using Tunable Resistive Pulse Sensing
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Cited by 99 •
2014
Extracellular vesicles play important roles in physiological and pathological processes, including coagulation, immune responses, and cancer or as potential therapeutic agents in drug delivery or regenerative medicine. This protocol presents methods for the quantification and size characterization of isolated and non-isolated extracellular vesicles in various fluids using tunable resistive pulse sensing.
FAQs
These measurements separate complementary features of movement. Velocity describes how quickly a vesicle travels, run length indicates the extent of sustained movement, directionality reflects the consistency of its travel path, and pausing captures interruptions in transport. Examining them together provides a more informative picture of intracellular trafficking than relying on a single motility measurement.
Molecular motors and cytoskeletal tracks provide the transport framework that moves vesicles through neuronal cells. Motility measurements therefore serve as functional readouts of how effectively this system supports movement along axons and toward synaptic terminals. Changes in trajectory, speed, or continuity can indicate altered transport performance without directly measuring the individual transport components.
Comparing vesicle motility across experimental conditions can expose changes in transport behavior that are not apparent from a single observation. Differences in velocity, run length, directionality, or pausing may indicate altered delivery toward synaptic terminals or a transport defect. This comparative approach helps connect cellular changes with mechanisms relevant to neuronal communication and disease processes.
A typical workflow begins by imaging fluorescently labeled vesicles in living cells over time. Researchers then follow individual vesicles, reconstruct their trajectories, and calculate movement measures such as velocity, run length, directionality, and pausing. Applying the same analysis across experimental conditions allows researchers to compare transport behavior and identify meaningful changes in intracellular movement.
Trajectory reconstruction converts time-lapse observations into a record of each vesicle's movement path. That record allows researchers to evaluate whether transport is sustained, interrupted, or directionally consistent, and it provides the basis for calculating motility parameters. In neuronal studies, these paths help relate vesicle movement to transport along axons and delivery into synaptic terminals.
In neuroscience, the method helps investigate how vesicles reach synaptic terminals and support neuronal communication. Researchers can use motility measurements to examine transport defects, compare movement under different experimental conditions, and clarify how intracellular transport contributes to synaptic vesicle delivery. These findings may also improve understanding of neurological disease processes associated with impaired vesicle transport.