Autophagic Organelles
Autophagic Organelles - Related Videos
04:33
Quantifying Bulk Autophagic Sequestration Activity in Mammalian Cells
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2025
The video demonstrates an assay for assessing bulk autophagic sequestration activity in mammalian cells. It utilizes electroporation to release cytosolic proteins, including lactate dehydrogenase (LDH). The sequestered LDH and total cellular LDH fractions are determined to assess LDH sequestration, providing insights into the overall bulk sequestration activity.
03:45
ADI-based Autophagy Induction in Prostate Cancer Cells: An Enzyme-based Technique to Measure Autophagic Response in Cells
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2023
In this video, we demonstrate arginine deiminase-based autophagy induction in prostate cancer cells. Further, advanced fluorescence microscopy can be used to visualize the changes associated with autophagy induction, including the formation and distribution of autophagosomes and lysosomes and their fusion into autolysosomes.
01:18
Autophagic Cell Death
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2023
Christian de Duve discovered “autophagy,” a process in which cellular components are engulfed by membrane-bound organelles called autophagosomes. The autophagosomes then fuse with lysosomes to digest the enclosed contents. Autophagy is generally activated in cells to prevent cell death. However, cell death is triggered when the damage is beyond repair. Autophagy and Apoptosis Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and pro-apoptotic...
15:39
Studying Organelle Dynamics in B Cells During Immune Synapse Formation
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Cited by 8 •
2019
Herein we describe two approaches to characterize cell polarization events in B lymphocytes during the formation of an IS. The first, involves quantification of organelle recruitment and cytoskeleton rearrangements at the synaptic membrane. The second is a biochemical approach, to characterize changes in composition of the centrosome, which undergoes polarization to the immune synapse.
01:43
The Movement of Organelles and Vesicles
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2023
In eukaryotic cells, cytoskeletal filaments such as actin, microtubules, and intermediate filaments form a mesh-like cytoskeletal network. These filaments serve as tracks for transporting cellular cargo. Specialized motor proteins use the chemical energy stored in adenosine triphosphate (ATP) for this transport. During interphase, microtubules are polarized, with the plus-end towards the cell periphery and the minus-end towards the cell center. Two microtubule-associated motor proteins,...
FAQs
Autophagic organelles operate as a sequential membrane system rather than a single compartment. An isolation membrane first expands around cytoplasmic material, producing an autophagosome. Fusion with a lysosome then changes the compartment into an autolysosome. This progression separates cargo capture from degradation and lets the cell move material through distinct stages of its quality-control pathway.
Fusion with a lysosome creates the autolysosome, the compartment in which cargo encounters acidic hydrolases. These enzymes degrade the enclosed material, allowing its constituents to be recycled. Without this transition, material captured by the isolation membrane and enclosed in the autophagosome would not reach the degradative environment required for effective cellular clearance.
Nutrient limitation and stress are conditions in which autophagic activity supports cellular homeostasis. By directing cytoplasmic material through autophagosomes and autolysosomes, the pathway helps cells manage their components while regulating energy use. This makes autophagic organelles relevant to studies of how cells adapt when resources are restricted or internal damage increases.
The pathway connects quality control to energy management by removing damaged cellular components and recycling their constituents. This dual role means autophagic organelles do more than dispose of unwanted material. They help maintain the internal condition of the cell while contributing to the regulation of available resources, especially during nutrient limitation and other forms of stress.
Examining these structures helps researchers trace how cells regulate quality control, respond to organelle damage, and manage energy use. Their progression from isolation membrane to autophagosome to autolysosome provides a framework for relating membrane-based cellular events to homeostasis. This approach can clarify how disrupted autophagy contributes to broader biological problems.
Autophagic organelles are relevant to research on neurodegeneration, infection, cancer, and other conditions associated with altered autophagy. In these areas, investigators can examine how changes in cellular clearance, degradation, or recycling relate to disease processes. The structures therefore provide a biological context for studying links between intracellular quality control and pathological states.
A study should distinguish membrane expansion, autophagosome formation, lysosomal fusion, and autolysosome-mediated degradation. These stages represent different points in the pathway and should not be treated as interchangeable indicators of activity. Separating them helps researchers determine whether a change affects cargo enclosure, delivery to the lysosome, or degradation and recycling after fusion.