Soluble Cargo Release
Soluble Cargo Release - Related Videos
04:02
Solubility - Concepts
0 Views •
2020
Solubility Solubility describes how much of a solute can dissolve in a given volume of a specific solvent. Solubility is usually reported in terms of solute mass per solvent volume or solute mass per solvent mass. For example, the solubility of sodium chloride in water at room temperature is reported as 36 g per 100 mL of water. If solubility is reported in solute mass per solvent mass, the solvent mass will need to be converted to volume for further calculations. Solubility changes with...
08:06
Identification of Kinesin-1 Cargos Using Fluorescence Microscopy
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Cited by 1 •
2016
Here, a protocol is presented to identify Kinesin-1 cargos. A motorless mutant of the Kinesin-1 heavy chain (KIF5B) aggregates in the cytoplasm and induces aggregation of its cargos. Both aggregates are detected under fluorescence microscopy. A similar strategy can be employed to identify cargos of other motor proteins.
02:35
Visualizing Intracellular Transport of Cargo in Cultured Astrocytes
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2025
Source: Creighton, B. A., et al. Visualizing and Analyzing Intracellular Transport of Organelles and Other Cargos in Astrocytes. J. Vis. Exp. (2019)This video demonstrates the visualization of intracellular cargo transport in cultured astrocytes using a fluorescent acidotropic probe that selectively labels acidic endolysosomal vesicles. Time-lapse imaging and Z-stack acquisition with a confocal microscope allow tracking of fluorescently labeled cargo throughout the three-dimensional cell volume.
02:19
Physical Properties Affecting Solubility
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2020
Solutions of Gases in Liquids As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
04:01
Factors Affecting Solubility
0 Views •
2020
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide: This solubility equilibrium may be shifted left by the addition of either silver or iodide ions, resulting in...
FAQs
Calcium entry provides the trigger that links electrical activity to membrane fusion. When an action potential reaches a neuron, voltage-gated calcium channels open, allowing calcium to enter near release-ready vesicles. This localized influx activates the fusion machinery, so vesicle discharge follows excitation rapidly. The sequence explains how changes in neuronal electrical signaling can produce chemical communication.
SNARE proteins provide the coordinated molecular machinery that brings a vesicle and the plasma membrane together for fusion. Their interactions convert the calcium-triggered signal into membrane merger and cargo discharge. Because this step sits between calcium influx and exocytosis, altered SNARE coordination could affect how efficiently neurons communicate, even when action potentials and calcium channels remain functional.
Soluble cargo can include neurotransmitters and neuropeptides, allowing release to influence neural signaling through distinct functions. Neurotransmitter discharge supports synaptic transmission, whereas neuropeptide release contributes to neuromodulation, which regulates neuronal circuit activity. Examining which cargo is released therefore helps distinguish rapid signal transfer from broader changes in circuit state.
An analysis can be organized across levels: calcium-dependent vesicle fusion describes the molecular event, transmitter or peptide discharge indicates the immediate signaling consequence, and altered circuit regulation links that event to neural function. Because the process participates in synaptic transmission and neuromodulation, measurements of release can help relate cellular mechanisms to changes in neuronal circuits and behavior.
Defects in vesicle trafficking or release can disrupt the delivery or discharge of soluble cargo, providing a mechanistic route from cellular malfunction to abnormal neural signaling. Studying these defects helps investigators determine whether disease-related changes arise during vesicle handling, membrane fusion, or downstream communication. This framework supports links between molecular abnormalities, circuit dysfunction, and behavioral changes.
Useful experimental interpretation should connect three questions: whether neuronal activity produces calcium entry, whether the fusion machinery responds, and what neural consequence follows cargo discharge. This organization separates electrical triggering, vesicle exocytosis, and signaling outcome rather than treating release as a single event. It can clarify how molecular changes propagate into synaptic transmission, neuromodulation, or circuit regulation.