Contractility Measurement
Contractility Measurement - Related Videos
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.
06:22
Contractility Measurements on Isolated Papillary Muscles for the Investigation of Cardiac Inotropy in Mice
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Cited by 14 •
2015
Murine left ventricular papillary muscle can be used to investigate cardiac contractility in vitro. This article describes in detail the isolation and experimental protocols to study cardiac contractile characteristics.
08:00
Measuring and Modeling Contractile Drying in Human Stratum Corneum
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Cited by 2 •
2017
This article describes a method of quantifying the dynamic drying behavior and mechanical properties of stratum corneum by measuring spatially resolved in-plane drying displacements of circular tissue samples adhered to an elastomer substrate. This technique can be used to measure how different chemical treatments alter drying and tissue mechanical properties.
07:03
Intrauterine Telemetry to Measure Mouse Contractile Pressure In Vivo
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Cited by 16 •
2015
This manuscript provides a protocol for implanting telemeters in the mouse for the purpose of measuring intrauterine pressures during pregnancy.
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...
FAQs
The measured variable determines which aspect of mechanical behavior is being evaluated. Shortening describes shape change, tension reflects force generation, displacement captures movement, and substrate deformation indicates forces transmitted to the surrounding surface. Selecting among these readouts helps distinguish contractile performance in muscle or cardiac tissue from cell-level mechanical activity, including changes associated with migration or cytoskeletal function.
These tools report different mechanical consequences of contraction. Force transducers quantify generated tension, whereas motion tracking follows shortening or displacement of cells and tissues. Traction force microscopy evaluates deformation of a substrate beneath contracting cells. The appropriate approach depends on whether the experiment prioritizes force, movement, or forces transmitted from cells to their mechanical environment.
Stimulation provides a defined trigger for contraction, allowing mechanical responses to be compared under controlled conditions. Calcium imaging can be collected alongside the mechanical recording to relate changes in calcium-associated activity to force production or shape change. Together, these measurements help separate altered activation from altered mechanical performance in muscle, cardiac tissue, or individual cells.
A typical workflow begins by preparing the muscle, cardiac tissue, or cells for observation and applying an appropriate stimulus when activation is required. The experiment then records shortening, tension, displacement, or substrate deformation using a suitable measurement system. Researchers may acquire calcium imaging at the same time, creating linked mechanical and cellular readouts for analysis.
This approach is useful when researchers need to evaluate mechanical function rather than relying only on structural or molecular observations. Applications include characterizing muscle physiology, assessing cardiac performance, examining cell migration, and studying cytoskeletal activity. Measurements can reveal how biological systems respond to drugs, disease states, genetic changes, or altered mechanical conditions.
Comparing mechanical recordings across experimental conditions shows whether a perturbation changes force production, shortening, displacement, or substrate deformation. A drug, disease state, genetic alteration, or mechanical environment may therefore produce a measurable shift in contractile behavior. When paired with stimulation or calcium imaging, the results can help relate that shift to activation or cellular mechanical function.