Invadopodia
Invadopodia - Related Videos
01:35
Cancer Cell Migration through Invadopodia
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2023
Invadosome is a broad category of cell surface structures with proteolytic activity that degrades the extracellular matrix (ECM). Invadosomes are present in normal cell types, including macrophages, endothelial cells, and neurons, as well as tumor cells. Although the macrophage podosomes and tumor cell invadopodia are classified as invadosomes, they have different structures, molecular pathways, and functions. Podosomes are short structures that last for a few minutes. However, invadopodia can...
08:48
Polyacrylamide Gels for Invadopodia and Traction Force Assays on Cancer Cells
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Cited by 9 •
2015
Mechanical rigidity in the tumor microenvironment plays a crucial role in driving malignant behavior by increasing invadopodia activity and actomyosin contractility. Using polyacrylamide gels (PAAs), invadopodia and traction force assays can be utilized to study the invasive and contractile properties of cancer cells in response to matrix rigidity.
14:23
Quantitative Measurement of Invadopodia-mediated Extracellular Matrix Proteolysis in Single and Multicellular Contexts
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Cited by 74 •
2012
We describe the prototypical method for producing microscope coverslips coated with fluorescent gelatin for visualizing invadopodia-mediated matrix degradation. Computational techniques using available software are presented for quantifying the resultant levels of matrix proteolysis by single cells within a mixed population and for multicellular groups encompassing entire microscopic fields.
07:58
Invasion Assay Using 3D Matrices
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2023
The extracellular matrix (ECM) is a network of molecules that provide a structural framework for cells and tissues and helps facilitate intercellular communication. Three-dimensional cell culture techniques have been developed to more accurately model this extracellular environment for in vitro study. While many cell processes during migration through 3D matrices are similar to those required for movement across rigid 2D surfaces, including adherence, migration through ECM also requires cells...
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Localized actin polymerization provides the protrusive structure, while adhesion and signaling proteins are recruited to organize and regulate that structure. These events do not act independently: their coordination positions the protrusion where the cell can interact with surrounding extracellular matrix. This organization helps connect cytoskeletal remodeling with the later delivery of matrix-degrading activity.
Concentrating metalloproteinases and other matrix-degrading proteases at the protrusion tip focuses extracellular matrix remodeling at the site where the cell extends forward. This spatial arrangement can create a localized path through surrounding tissue rather than distributing degradation broadly. Consequently, protease positioning links invadopodium activity to directed penetration and invasive cell movement.
Adhesion and signaling proteins help organize the connection between the actin-rich protrusion and its extracellular surroundings. Their recruitment contributes to the formation and regulation of the structure, allowing cytoskeletal activity and matrix interaction to occur together. Studying these components can therefore reveal regulatory points that influence how invasive cells remodel their environment.
Their matrix-remodeling activity has consequences in several biological settings. In cancer, invadopodia support tissue invasion and metastasis; in vascular remodeling and tissue development, related invasive behavior can help cells reshape surrounding environments. Comparing these contexts allows biology researchers to examine how a shared cellular mechanism contributes to distinct outcomes.
Researchers can assess two complementary features: how invadopodia form and how effectively they remodel the extracellular matrix. Formation studies focus on localized actin polymerization and recruitment of adhesion and signaling proteins, whereas activity studies consider protease secretion and the resulting matrix changes. Examining both provides a fuller picture of invasive cell behavior.
Invadopodia provide a cellular framework for investigating how tumor cells penetrate surrounding tissue and contribute to metastasis. By connecting protrusion formation, protein recruitment, and localized matrix degradation, this research can identify mechanisms associated with tumor progression. The same framework also helps evaluate potential targets intended to limit invasive cell behavior.