Axon Trafficking Assessment
Axon Trafficking Assessment - Related Videos
10:30
Use of pHluorin to Assess the Dynamics of Axon Guidance Receptors in Cell Culture and in the Chick Embryo
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Cited by 10 •
2014
We describe here the use of a pH-sensitive green fluorescent protein variant, pHluorin, to study the spatio-temporal dynamics of axon guidance receptors trafficking at the cell surface. The pHluorin-tagged receptor is expressed both in cell culture and in vivo, using electroporation of the chick embryo.
11:27
Analysis of SCAP N-glycosylation and Trafficking in Human Cells
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Cited by 17 •
2016
We describe a modified method for membrane fraction isolation from human cells and sample preparation for the detection of SCAP N-glycosylation and total protein by using western blot. We further introduce a GFP-labeling method to monitor SCAP trafficking using confocal microscopy. This protocol can be used in regular biology laboratories.
07:55
Imaging the Intracellular Trafficking of APP with Photoactivatable GFP
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Cited by 6 •
2015
While the transport of cell surface proteins is relatively easily studied, visualizing the trafficking of intracellular proteins is much more difficult. Here, we use constructs incorporating photoactivatable GFP and demonstrate a method to accurately follow the amyloid precursor protein from the Golgi apparatus to down-stream compartments and follow its clearance.
07:48
Tracking Drug-induced Changes in Receptor Post-internalization Trafficking by Colocalizational Analysis
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Cited by 1 •
2015
Receptor trafficking modulates signaling and cell responsiveness to ligands and is, itself, responsive to cell conditions, including ligand-induced signaling. Here, we describe a powerful and flexible technique for quantitatively assessing drug-induced receptor trafficking using immunolabeling and colocalizational analysis.
03:24
Two-Photon Laser Axotomy: A Method to Injure Axons in Zebrafish Embryos and Observe Axonal Recovery
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2023
This video describes the method to injure axons in zebrafish embryos using two photon laser axotomy and observing axonal recovery from injury.
FAQs
Microtubules provide the axonal tracks, while motor proteins convert their interaction with cargo into directed movement. Kinesin and dynein are the principal motor classes named in this context, and their activity enables vesicles, proteins, organelles, and other materials to travel between the neuronal cell body and axon terminal. Measuring this movement tests how axonal polarity is maintained.
Kinesin and dynein should be treated as distinct transport components rather than interchangeable labels. An assessment can examine how cargo movement relates to each motor class, including cargo distribution, direction, and transport dynamics. This comparison helps connect a trafficking phenotype to the transport machinery involved without reducing the result to cargo abundance alone.
Location alone does not capture transport behavior. By evaluating cargo distribution together with movement, direction, and transport dynamics, investigators can distinguish where material is found from how it gets there and whether movement remains precisely directed. These measurements provide a functional view of polarized neuronal architecture and the transport processes that support neuronal signaling.
Trafficking defects matter because neuronal function depends on delivering materials to the correct axonal locations. Abnormal cargo distribution or movement may therefore expose failures in systems that support polarized architecture, signaling, or communication. In research, these measurements help relate cellular transport phenotypes to neurodevelopmental disorders, neurodegeneration, and impaired neuronal communication.
Researchers use live-cell imaging to observe cargo movement through axons and then apply quantitative analysis to characterize what the images show. Measurements can address cargo distribution, movement, direction, and transport dynamics. This combination links visual observations with comparable transport data, allowing investigators to evaluate whether axonal delivery is organized and precisely directed.
In neuroscience, this assessment is useful when the research question concerns how transport supports neuronal maintenance or communication. Quantitative results can show whether cargo is properly distributed, moves in the expected direction, or displays altered dynamics. The framework also supports investigation of trafficking abnormalities associated with disease-related neuronal dysfunction, including neurodevelopmental and neurodegenerative conditions.