Ecm Stiffness
Ecm Stiffness - Related Videos
04:10
An Assay to Study the Impact of Extracellular Matrix Stiffness on Bacterial Infection
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2025
This video demonstrates an assay to study the effect of extracellular matrix (ECM) stiffness on bacterial infection of adherent cells. Polyacrylamide hydrogels of varying stiffness, overlaid with collagen, are layered in a multi-well plate to mimic the stiffness of physiological ECM. Upon overlaying human endothelial cells on the hydrogels and infecting the cells with Listeria monocytogenes bacteria engineered to express a fluorescent protein once intracellular, flow cytometry is used to...
10:19
Studying the Effects of Matrix Stiffness on Cellular Function using Acrylamide-based Hydrogels
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Cited by 69 •
2010
The effect of substrata stiffness on cellular function can be modeled in vitro using polyacrylamide hydrogels of varying compliances.
07:48
Generation of Polyacrylamide and Silicone Extracellular Matrix Substrates with Defined Stiffness for Cell Biology Applications
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2026
Although extracellular matrix (ECM) stiffness is a key regulator of cellular behavior, the underlying sensing and transduction mechanisms remain unclear. To address this, we provide protocols for creating polyacrylamide- and silicone-based substrates with tunable stiffness to advance our understanding of cell-ECM crosstalk.
07:45
Simple Polyacrylamide-based Multiwell Stiffness Assay for the Study of Stiffness-dependent Cell Responses
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Cited by 56 •
2015
Here, a method that enables quick, efficient, and inexpensive preparation of polyacrylamide gels in a multiwell plate format is described. The method does not require any specialized equipment and could be easily adopted by any research laboratory. It would be particularly useful in research focused on understanding stiffness-dependent cell responses.
05:45
Measuring the Bending Stiffness of Bacterial Cells Using an Optical Trap
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Cited by 9 •
2010
We present a protocol for bending filamentous bacterial cells attached to a cover-slip surface with an optical trap to measure the cellular bending stiffness.
FAQs
Cells detect rigidity through integrins, which connect the extracellular matrix to focal adhesions and the cytoskeleton. This physical linkage allows changes in matrix resistance to be converted into intracellular mechanotransduction signals. Those signals can modify cell shape, gene expression, and downstream signaling, giving cells a way to respond to their mechanical environment.
Focal adhesions serve as important mechanical connection points rather than passive attachments. By linking matrix contacts with the cytoskeleton, they help transmit physical information into the cell. This transmission matters because it couples external rigidity to changes in organization, movement, growth, and differentiation, allowing tissue cells to adjust behavior as their surrounding matrix changes.
A change in ECM stiffness can influence several cell decisions at once. Through mechanotransduction, altered rigidity may affect how cells organize within a tissue, move, grow, or differentiate, while also changing gene expression and signaling. Studying these linked responses helps connect a physical property of the tissue environment with biological outcomes at the cellular level.
ECM stiffness can be examined as a physical factor in tissue development and wound healing. Researchers compare how cells organize, move, grow, and differentiate under controlled matrix conditions, then relate those behaviors to mechanotransduction, gene expression, and signaling. This approach helps place cell responses within the changing mechanical environment of a developing or repairing tissue.
A basic study begins by selecting or engineering a matrix whose stiffness can be controlled or measured. Cells are then examined in that defined mechanical setting for changes in organization, movement, growth, differentiation, shape, gene expression, or signaling. Comparing these observations across matrix conditions connects the physical property being tested with specific cellular responses.
Engineered matrices provide platforms for isolating the contribution of mechanical conditions to cell behavior. They can support comparisons of how rigidity affects organization, movement, growth, and differentiation while researchers monitor associated changes in shape, gene expression, and signaling. Such systems are useful because they connect a tunable physical environment with measurable biological outcomes.
In disease research, altered matrix mechanics can be studied in relation to fibrosis and tumor progression, while wound healing offers a tissue-repair context. The goal is not simply to describe a material property, but to determine how mechanical cues influence cellular behavior through integrin-linked adhesions and mechanotransduction. These findings can also inform biomaterial design.