Lamellipodial Protrusions
Lamellipodial Protrusions - Related Videos
01:28
Types of Membrane Protrusions
0 Views •
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
0 Views •
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
0 Views •
2017
We present a software solution for semi-automated tracking of relative protein concentration along the length of dynamic cellular protrusions.
05:50
Measuring Cell-Edge Protrusion Dynamics during Spreading using Live-Cell Microscopy
0 Views •
Cited by 2 •
2021
This protocol aims to measure the dynamic parameters (protrusions, retractions, ruffles) of protrusions at the edge of spreading cells.
11:39
Analyzing In Vivo Cell Migration using Cell Transplantations and Time-lapse Imaging in Zebrafish Embryos
0 Views •
Cited by 4 •
2016
Combining cell transplantation, cytoskeletal labeling and loss/gain of function approaches, this protocol describes how the migrating zebrafish prospective prechordal plate can be used to analyze the function of a candidate gene in in vivo cell migration.
FAQs
At the leading edge, the Arp2/3 complex organizes actin filaments into a branched network. Continued polymerization expands this network against the cell membrane, generating the force that extends the edge outward. This arrangement links molecular assembly to a visible change in cell shape, making filament branching and polymerization central variables when analyzing lamellipodial protrusion.
Adhesion helps stabilize a newly extended protrusion, while actin remodeling coordinates the underlying cytoskeletal structure. Neither process is an isolated step: membrane advancement must be coupled to attachment and ongoing rearrangement. This coordination allows the protrusion to persist and supports productive movement across a surface rather than transiently changing cell shape.
Lamellipodial protrusions act as interfaces between the cell and its surroundings. Their formation and remodeling can translate chemical and mechanical signals into directed movement, linking environmental sensing with migration. Studying these structures therefore helps explain how cells do more than extend a membrane: they adjust movement in response to external information.
Imaging allows investigators to follow protrusion formation and actin organization at the cell edge. By observing these structures while cells move, researchers can connect changes in membrane shape with cytoskeletal dynamics and migration behavior. This approach is useful for examining how a visible protrusion reflects underlying actin activity and coordinated cell movement.
Molecular perturbation tests how particular components or processes contribute to protrusion behavior. In this context, altering machinery associated with actin dynamics, branching, adhesion, or remodeling can reveal which changes affect extension and migration. Comparing the resulting structures and movement provides functional evidence rather than relying only on their appearance in images.
Lamellipodial protrusions are relevant wherever directed cell movement matters. Their study informs wound healing, embryonic development, immune-cell trafficking, and cancer-cell invasion. These applications connect a shared cellular motility mechanism with distinct biological settings, allowing researchers to ask how altered protrusion dynamics may influence tissue repair, developmental positioning, immune movement, or invasive behavior.