Contractility Monitoring
Contractility Monitoring - Related Videos
02:15
The Contractile Ring
0 Views •
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
0 Views •
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
0 Views •
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...
14:02
Ex Vivo Assessment of Contractility, Fatigability and Alternans in Isolated Skeletal Muscles
0 Views •
Cited by 53 •
2012
We describe a method to directly measure muscle force, muscle power, contractile kinetics and fatigability of isolated skeletal muscles in an in vitro system using field stimulation. Valuable information on Ca2+ handling properties and contractile machinery of the muscle can be obtained using different stimulating protocols.
FAQs
Measurements are first interpreted against a baseline response obtained under defined conditions, then compared with the change produced by a pathogen, inflammatory signal, immune-cell interaction, or other stimulus. This comparison helps distinguish pre-existing mechanical activity from stimulus-associated effects and shows whether the response changes in strength, timing, or persistence. Such contrasts connect experimental exposure with altered cellular or tissue function.
Length and displacement describe how far a cell, tissue, or biomaterial changes position or shape, whereas force-sensitive measurements indicate the mechanical strength associated with contraction. Tracking these variables over time adds dynamic information, such as how a response develops or changes after stimulation. Selecting the measured output therefore influences which aspect of mechanical function the experiment can evaluate.
Controlled conditions make responses more comparable across baseline and stimulated measurements. They help researchers attribute changes in contraction to the tested pathogen, inflammatory signal, or immune-cell interaction rather than to uncontrolled differences in the experimental setting. This is especially important when the goal is to relate mechanical measurements to disease mechanisms, therapeutic effects, or recovery.
A typical workflow establishes the system and its baseline activity, applies the selected stimulus under controlled conditions, and records contraction through imaging or force-sensitive measurements. The resulting changes in length, displacement, force, or motion are then quantified over time and compared with baseline. This sequence produces a functional mechanical readout that can be related to the experimental intervention.
The method is useful when researchers need to determine how pathogens, inflammatory signals, or interactions between immune cells and other cells affect mechanical function. It can connect molecular or cellular events with physical changes in cells or tissues, providing a functional perspective on host-pathogen interactions and disease mechanisms that may not be captured by molecular measurements alone.
By comparing contractile responses across baseline, disease-related or inflammatory conditions, and treatment-related conditions, researchers can evaluate whether mechanical function changes after an intervention. Measurements may also help characterize recovery by showing whether contraction returns toward the baseline response. These outcomes support assessment of therapeutic effects and provide a physical indicator of altered or restored tissue function.