Airway Smooth Muscle
Airway Smooth Muscle - Related Videos
08:02
Isolation of Pulmonary Artery Smooth Muscle Cells from Neonatal Mice
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Cited by 16 •
2013
We have developed a novel and reproducible technique to isolate primary cultures of pulmonary artery smooth muscle cells (PASMC) from mice as young as P7, thereby allowing better study of the signaling pathways involved in neonatal smooth muscle cell contraction and relaxation.
17:41
Focal Ca2+ Transient Detection in Smooth Muscle
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2009
Details methods for high-resolution Ca2+ imaging of smooth muscle within isolated organs, including: preparation of the tissue, image acquisition and data analysis.
01:23
Functions of Smooth Muscles
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2024
Smooth muscles are an important type of muscle tissue that plays a vital role in the involuntary movements of internal organs. For example, they help regulate the movement of food through the gut and the flow of blood through the circulatory system. Function of visceral smooth muscles Visceral smooth muscle is found in the walls of all hollow organs, except the heart, and is a key player in the involuntary movements that drive the functioning of these internal organs. This tissue is arranged in...
01:25
Smooth Muscle Contraction
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2024
Smooth muscle contraction is a complex process vital for various bodily functions, from maintaining blood vessel tension to facilitating the movement of food through the digestive tract. Unlike striated muscles, smooth muscle contraction begins more slowly and lasts longer. The onset of contraction is triggered by an increase in calcium ions within the sarcoplasm, similar to the process in striated muscle. However, smooth muscles have a relatively smaller reservoir of the sarcoplasmic...
08:24
Isolation of Murine Coronary Vascular Smooth Muscle Cells
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Cited by 11 •
2016
The purpose of this protocol is to demonstrate the isolation and culture techniques of murine primary vascular smooth muscle cells (VSMCs) from the coronary circulation. Once VSMCs have been isolated, they can be used for many standard culture techniques.
FAQs
Intracellular calcium acts as a key link between incoming signaling and contractile activity. When signaling pathways raise calcium levels inside airway smooth muscle cells, the cells generate greater contraction, reducing airway diameter. This relationship gives researchers a mechanistic way to examine how cellular signals alter airway narrowing and how interventions might influence smooth muscle tone.
Bronchodilator signals reduce the contractile activity of airway smooth muscle rather than increasing intracellular calcium-driven contraction. As contractile activity decreases, the surrounding airway can widen and allow greater air movement. Comparing constricting and relaxing signals helps investigators evaluate the balance of forces that controls airway tone in normal and disease-related conditions.
Abnormal contraction refers to excessive narrowing caused by heightened contractile activity, whereas airway hyperresponsiveness describes an exaggerated tendency to respond with narrowing. Remodeling represents longer-term alteration of the airway smooth muscle environment or structure. Distinguishing these features helps explain why airflow restriction may reflect both immediate changes in tone and broader disease-related changes.
In asthma research, investigators examine how airway smooth muscle contributes to bronchoconstriction and airway hyperresponsiveness. They may focus on changes in contractile signaling, the strength of narrowing responses, or remodeling associated with restricted airflow. These observations connect cellular behavior with clinically relevant breathing problems and help identify processes that treatments should address.
Treatment research can target airway smooth muscle tone by seeking to reduce excessive contraction or support relaxation. The goal is to widen narrowed airways and improve breathing, particularly when abnormal smooth muscle behavior contributes to asthma or other obstructive lung diseases. Studying these effects also helps assess whether an approach influences immediate contractile activity or disease-associated remodeling.
Studies can clarify how signaling changes intracellular calcium, how contractile activity alters airway caliber, and how abnormal responsiveness or remodeling contributes to airflow restriction. These findings support medical research into bronchoconstriction, asthma, and other obstructive lung diseases. They also provide a basis for evaluating treatments designed to modify smooth muscle tone and improve breathing.