Endpoint Invasion Assay
Endpoint Invasion Assay - Related Videos
07:58
Invasion Assay Using 3D Matrices
0 Views •
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...
07:53
An In vitro FluoroBlok Tumor Invasion Assay
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Cited by 23 •
2009
This video demonstrates how to measure cell invasion through cell culture inserts using a fluorescence-based methodology.
10:16
Chick Heart Invasion Assay for Testing the Invasiveness of Cancer Cells and the Activity of Potentially Anti-invasive Compounds
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Cited by 4 •
2015
Here, we present a protocol to study the invasion of tumor cells into living normal tissue fragments in three dimensions. This organ culture technique is mainly applied to test potentially anti-invasive drugs in vitro.
09:55
In vitro Cell Migration and Invasion Assays
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Cited by 627 •
2014
Commonly used, highly accessible methods for examining cell migration and invasion in vitro are described. The first method is the cell wound closure assay that measures cell motility. The second method is the transwell migration and invasion assay that assesses the chemotactic and invasive capacity of cells.
12:19
Three-Dimensional (3D) Tumor Spheroid Invasion Assay
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Cited by 222 •
2015
Invasion of surrounding normal tissues is a defining characteristic of malignant tumors. We provide here a simple, semi-automated micro-plate assay of invasion into a natural 3D biomatrix that has been exemplified with a number of models of advanced human cancers.
FAQs
The coated membrane creates a barrier that cells must penetrate before reaching the lower chamber. This added matrix-like layer distinguishes movement through a restrictive environment from movement across an uncoated porous membrane. Because the barrier is standardized, researchers can compare invasive behavior between cell populations or experimental conditions using the number of cells that reach the endpoint.
Chemoattractants placed in the lower chamber promote cell movement through the membrane and matrix substitute. Their position provides a directional cue, encouraging cells in the upper chamber to move toward the lower compartment. This arrangement helps investigators evaluate how effectively cells respond to a stimulus while also penetrating the barrier.
The endpoint establishes a defined time for collecting the assay outcome, which makes results from different experimental conditions easier to compare. Cells that have crossed the barrier are then fixed, stained, and counted. The resulting count represents the extent of barrier penetration at that selected time rather than an unrestricted record of movement over time.
Cells are placed in the upper chamber of a device containing a porous membrane coated with an extracellular matrix substitute. A chemoattractant is added to the lower chamber, and the setup is maintained until the selected endpoint. Cells that cross the barrier are then fixed, stained, and counted to generate the invasion measurement.
Researchers can use the assay to compare invasive behavior between untreated and drug-treated cells or between cells with different genetic characteristics. Differences in the number of cells crossing the matrix-coated membrane indicate that the tested condition may alter barrier penetration. The controlled chamber format supports side-by-side evaluation of these experimental groups.
In cancer biology, the assay provides a controlled model for examining how tumor cells penetrate an extracellular-matrix-like barrier. Investigators can use it to study invasive behavior, test genetic or drug-induced changes, and explore processes associated with tissue penetration and metastasis. The counted endpoint supplies a measurable basis for comparing these cancer-related conditions.