Lymphatic Contractility
Lymphatic Contractility - 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.
09:52
Non-invasive Optical Imaging of the Lymphatic Vasculature of a Mouse
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Cited by 25 •
2013
Recently developed imaging techniques using near-infrared fluorescence (NIRF) may help elucidate the role the lymphatic system plays in cancer metastasis, immune response, wound repair, and other lymphatic-associated diseases.
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...
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
Wall stretch and pressure provide mechanical signals that influence rhythmic contractions in collecting lymphatic vessels. These responses help adjust the pumping activity of sequential lymphangions as lymph accumulates and moves through the vessel. Studying how contractility changes under different mechanical conditions can reveal why altered tissue forces may contribute to impaired lymph drainage.
Sequential lymphangions generate localized pumping along collecting vessels, while one-way valves coordinate the direction of movement between adjacent segments. The valves limit backward displacement when pressure changes or a segment relaxes. Examining these components together is important because effective transport depends on both muscular force and directional control, not contraction alone.
Contractile frequency, force, and resulting flow can change when lymphatic vessels are exposed to drugs, altered mechanical forces, or disease-related conditions. These variables may affect the vessel's pumping performance and the efficiency of lymph return. Comparing responses across conditions helps identify how external influences or pathology disrupt normal lymphatic transport.
Researchers can evaluate contractile frequency, contraction force, and lymph flow as complementary indicators of vessel performance. Frequency describes how often pumping occurs, force reflects the strength of each contraction, and flow shows the resulting transport outcome. Considering all three helps distinguish frequent but weak contractions from activity that effectively moves lymph.
Studies of lymphatic contractility can compare vessel activity under conditions associated with edema or inflammation and assess changes in frequency, force, or flow. These measurements connect altered pumping behavior with the ability to remove excess tissue fluid. The approach helps clarify whether impaired lymphatic function contributes to fluid accumulation or reflects disease-related vessel changes.
Contractility studies identify how lymphatic pumping becomes impaired and how transport might be restored. By examining responses to drugs and mechanical forces, researchers can evaluate strategies intended to improve lymph drainage. The findings may support therapies for lymphatic disorders and guide interventions aimed at reducing problems caused by inadequate return of tissue fluid to the bloodstream.