Lysosome Trafficking
Lysosome Trafficking - Related Videos
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.
02:58
Nanoparticle-Mediated Visualization of Endo-Lysosomal Remodeling in Bacterially-Infected Cells
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2025
Source: Zhang, Y., et al. Application of Fluorescent Nanoparticles to Study Remodeling of the Endo-lysosomal System by Intracellular Bacteria. J. Vis. Exp. (2015)This video demonstrates the use of fluorescent nanoparticles to visualize endo-lysosomal remodeling in human epithelial cells infected by intracellular bacteria. Following bacterial invasion, the pathogens manipulate the host cytoskeleton and endo-lysosomal system, forming vacuoles with tubular projections that alter vesicle transport.
01:31
Lysosomes
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2023
Lysosomes are membrane-enclosed spherical sacs derived from the Golgi apparatus. The most important function of the lysosome is degrading macromolecules and biological polymers that are released during membrane trafficking events such as the secretory, endocytic, autophagic, and phagocytic pathways. The degradation is carried out by several hydrolytic enzymes active in an acidic environment of the lysosomal lumen. These acid hydrolases are involved in cellular processes such as cell signaling,...
01:31
Lysosomes
0 Views •
2023
Lysosomes are membrane-enclosed spherical sacs derived from the Golgi apparatus. The most important function of the lysosome is degrading macromolecules and biological polymers that are released during membrane trafficking events such as the secretory, endocytic, autophagic, and phagocytic pathways. The degradation is carried out by several hydrolytic enzymes active in an acidic environment of the lysosomal lumen. These acid hydrolases are involved in cellular processes such as cell signaling,...
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.
FAQs
Microtubules provide intracellular tracks for lysosome movement, while kinesin and dynein supply the motor activity that transports these organelles along those tracks. Their coordinated action helps distribute lysosomes throughout the cell rather than leaving them concentrated in one region. This positioning supports access to cargo and helps cells coordinate degradation, recycling, and signaling.
Rab GTPases and tethering factors help give lysosome trafficking spatial specificity. Rather than simply moving lysosomes through the cytoplasm, the pathway uses these components to direct targeting, docking, and subsequent interactions with other compartments. Their activity helps ensure that lysosomes encounter the appropriate endosomes or autophagosomes for efficient cargo processing.
Fusion connects lysosomes with endosomes or autophagosomes, allowing material in those compartments to reach the lysosomal degradation system. This step links organelle movement with the actual processing of cellular cargo. Studying fusion therefore helps explain how cells coordinate macromolecule degradation and recycling, rather than treating lysosome positioning as an isolated transport event.
Changes in lysosome positioning can influence how efficiently cells organize degradation, recycling, and signaling activities. Because trafficking controls where lysosomes are distributed and which compartments they contact, defects may disrupt several functions at once. Examining these changes provides a way to connect altered organelle distribution with broader cellular phenotypes and disease-associated mechanisms.
Live-cell imaging allows researchers to observe lysosome movement and positioning as cellular processes occur. Genetic or pharmacological perturbation can then modify components of the pathway, enabling comparisons between normal and altered trafficking. Together, these approaches link visible changes in organelle behavior to effects on cellular function, including degradation, recycling, and signaling.
Perturbation can test whether particular trafficking components are required for lysosome distribution, targeting, docking, or fusion. Researchers can compare the resulting trafficking changes with cellular outcomes to distinguish transport-related effects from downstream functional consequences. This strategy is especially useful when investigating the roles of motor proteins, Rab GTPases, or tethering factors.
Lysosome trafficking provides a common framework for studying diseases and cellular challenges in which degradation, recycling, signaling, or organelle distribution may be disrupted. Its relevance extends across neurodegeneration, lysosomal storage disorders, infection, and cancer. Tracking pathway changes can help relate defects in lysosome behavior to altered macromolecule processing and cell function.