Membrane Protrusions
Membrane Protrusions - Related Videos
01:28
Types of Membrane Protrusions
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2023
The protrusion of the cell surface is an initial step for several cellular processes, including cell migration, phagocytosis, and neurite outgrowth. These membrane protrusions are a result of cytoskeletal rearrangement. The most widely observed cell protrusions include lamellipodia, pseudopodia, filopodia, microvilli, invadopodia, and podosomes. These protrusions can be of two types — static or dynamic. The microvilli, an example of stable protrusions, are finger-like projections with a...
06:37
Protrusion Force Microscopy: A Method to Quantify Forces Developed by Cell Protrusions
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Cited by 5 •
2018
Here, we detail the experimental techniques used to evaluate the protrusion forces that podosomes apply on a compliant film, from the preparation of the film to the automated analysis of topographical images.
08:12
A Graphical User Interface for Software-assisted Tracking of Protein Concentration in Dynamic Cellular Protrusions
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2017
We present a software solution for semi-automated tracking of relative protein concentration along the length of dynamic cellular protrusions.
06:58
Quantification of Membrane Ruffle Formation Using Scanning Electron Microscopy
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2025
This video demonstrates sample preparation, fixation, and imaging of a macrophage cell that displays membrane ruffles using scanning electron microscopy, SEM. Detailed information about membrane morphology and organization is crucial for understanding the physiological condition of the cells.
04:34
3D Culture Basement Membrane Assay: Culturing Cancer Cells on 3D Basement Membrane Protein Matrix to Study Cell Invasion
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2023
This video provides a detailed methodology to grow breast cancer cells in a 3D basement membrane protein matrix, exemplifying the potential of 3D culture in the assessment of cell invasion into the surrounding environment.
FAQs
Actin polymerization supplies the force that pushes the plasma membrane outward. As filaments grow beneath the membrane, the extension can advance, while adhesion proteins help stabilize its contact with a surface. Myosin-generated forces add contractile tension that can reshape the protrusion, allowing cytoskeletal activity to influence cell form and behavior.
They represent distinct structural and functional arrangements rather than interchangeable labels. Filopodia, lamellipodia, and microvilli are common examples that differ in architecture and function. Comparing them helps relate the organization of actin-supported membrane extensions to particular cellular tasks, including sensing surroundings, movement, or interaction with neighboring cells and surfaces.
Adhesion proteins and myosin-generated forces regulate what happens after actin pushes the membrane outward. Adhesion proteins can secure the extension, whereas myosin forces can stabilize or reshape it. Their coordinated activity matters because protrusions must not only form, but also maintain useful contacts and adjust cell shape as the cell responds to its surroundings.
Studying Membrane Protrusions connects molecular force generation with larger biological behaviors. These structures provide a way to examine how cytoskeletal activity contributes to cell migration, tissue organization, immune responses, and interactions with neighboring cells or external surfaces. This perspective links changes in cell shape to coordinated behavior within tissues rather than treating morphology as an isolated feature.
At the tissue level, protrusions help relate cellular responses to the physical and spatial environment. Their capacity to sense surroundings and interact with neighboring cells or surfaces offers insight into how cell shape, contact, and movement contribute to tissue organization. Examining these extensions therefore connects individual cellular behavior with larger patterns of tissue structure.
Membrane protrusions are relevant to both normal and disease-related biology because their shape-changing behavior can be examined in different cellular contexts. In immune responses, they help frame questions about cellular interaction and movement; in cancer research, they provide insight into invasion. This makes protrusion dynamics a link between cytoskeletal regulation, cell behavior, and disease mechanisms.