Cell Contractility Assay
Cell Contractility Assay - Related Videos
06:02
Development of an In Vitro Assay to Evaluate Contractile Function of Mesenchymal Cells that Underwent Epithelial-Mesenchymal Transition
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Cited by 16 •
2016
Here, we describe the development and application of a gel contraction assay for evaluating contractile function in mesenchymal cells that underwent epithelial-mesenchymal transition.
02:15
The Contractile Ring
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2023
Contractile rings are composed of microfilaments and are responsible for separating the daughter cells during cytokinesis. Contractile ring assembly proceeds along with other cell cycle events; however, very few mechanistic details are known about the timing and coordination of the contractile rings with the cell cycle. A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
02:15
The Contractile Ring
0 Views •
2021
Contractile rings are composed of microfilaments and are responsible for separating the daughter cells during cytokinesis. Contractile ring assembly proceeds along with other cell cycle events; however, very few mechanistic details are known about the timing and coordination of the contractile rings with the cell cycle. A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
08:08
Measurement of Cytosolic Ca2+ in Isolated Contractile Lymphatics
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Cited by 24 •
2011
We introduce an approach to evaluate the cytosolic Ca2+ concentration in isolated lymphatics to study Ca2+-dependent and Ca2+-sensitizing mechanisms of lymphatic smooth muscle contraction.
09:49
Procedures for Rat in situ Skeletal Muscle Contractile Properties
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Cited by 18 •
2011
This video demonstrates the surgical preparation and procedures needed to study the contractile responses of the rat medial gastrocnemius muscle preparation in situ. This preparation allows measurement of skeletal muscle contractile properties under physiological conditions. The animal is anesthetized and the muscle is separated from surrounding tissue at its distal end. The Achilles tendon is attached to a force transducer, allowing measurement of the muscle’s contractile response at 37...
FAQs
Mechanical output depends on more than contraction inside an individual cell. Cytoskeletal activity generates force, while cell adhesion and connections to the extracellular matrix allow that force to be transmitted outward. The assay therefore links internal cellular mechanics with changes in a substrate, micropost, or gel. This makes it useful for relating force production to organization, migration, and tissue behavior.
Deformable substrates report changes in substrate shape, elastic microposts report post deflection, and collagen gels report overall gel contraction. These formats emphasize different scales of mechanical behavior: local displacement, force-associated post movement, or collective remodeling of a matrix-containing material. Selecting among them depends on whether the study focuses on cellular output, force transmission, or tissue-like organization.
Adhesion determines how effectively cells couple their contractile machinery to surrounding material, whereas extracellular matrix interactions provide the context in which forces are transmitted and tissue structure changes. Altering this mechanical connection can therefore change the measured displacement, force, or gel contraction. Interpreting results requires considering both cell-generated activity and the matrix or substrate receiving it.
A basic workflow begins by choosing a format that can deform or move in response to cellular activity. Cells are then examined as they contract the selected substrate, deflect elastic microposts, or change collagen-gel shape. Researchers quantify the resulting displacement, force, or gel contraction, creating a mechanical readout that can be compared with cellular behavior or tissue organization.
These assays can connect mechanical behavior to cytoskeletal activity, adhesion, migration, and wound closure. In biology, that makes them useful when researchers need to examine how cells interact with the extracellular matrix rather than observing cell shape or movement alone. The measurements can reveal how contractile behavior contributes to cell behavior and the organization of surrounding tissue.
Applications extend from muscle function to fibrosis and cancer invasion, where force generation and matrix interaction are biologically important. The assays also support studies of physical-force effects on cellular signaling and tissue remodeling. Their value lies in connecting a measurable mechanical outcome, such as displacement or gel contraction, with broader changes in cell behavior and tissue organization.