Bronchial Airway Hyperreactivity
Bronchial Airway Hyperreactivity - Related Videos
14:39
Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma
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Cited by 4 •
2010
Bronchial thermoplasty is a non-drug procedure for severe persistent asthma that delivers thermal energy to the airway wall in a precisely controlled manner to reduce excessive airway smooth muscle. Reducing airway smooth muscle decreases the ability of the airways to constrict, thereby reducing the frequency of asthma attacks.
09:58
A Reversible, Non-invasive Method for Airway Resistance Measurements and Bronchoalveolar Lavage Fluid Sampling in Mice
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Cited by 10 •
2010
Repeated measurements of rodent respiratory physiology and sampling of airway inflammatory cells are desirable, but generally not feasible. Here we describe a repeatable method for orally intubating mice that permits repeated measurements of airway hyperreactivity and sampling of airway inflammatory cells.
09:26
Generation of Lymphocytic Microparticles and Detection of their Proapoptotic Effect on Airway Epithelial Cells
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Cited by 7 •
2015
Cell membrane–shed microparticles (MPs) are active biological vesicles that can be isolated and their pathophysiological effects investigated in various models. Here we describe a method for generating MPs derived from T lymphocytes (LMPs) and for demonstrating their proapoptotic effect on airway epithelial cells.
14:32
Primary Human Bronchial Epithelial Cells Grown from Explants
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Cited by 19 •
2010
Here we describe a detailed method for growing primary human bronchial epithelial cells from explants of human bronchial airway tissue including differentiated growth on an air-liquid interface. This method provides an abundant source of primary cells for investigating the role of the airway epithelium in human lung health and disease.
01:23
The Bronchial Tree
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2025
The human bronchi and bronchial tree play a crucial role in the respiratory system, facilitating the exchange of oxygen and carbon dioxide. Let's delve into the intricate structure and functions of these respiratory components. The trachea, commonly known as the windpipe, is a tube that connects the larynx (voice box) to the bronchi. At a point called the carina, it bifurcates into two primary bronchi. The right primary bronchus is wider, shorter, and more vertical than the left primary...
FAQs
Methacholine provides a pharmacological probe by activating muscarinic receptors in the airways. This receptor stimulation provokes bronchoconstriction, creating a controlled response that can be measured as an indicator of airway sensitivity. In pharmacology, the resulting change helps researchers examine receptor-mediated airway narrowing and evaluate how effectively candidate bronchodilators counteract that response.
Inflammation and mediator release can amplify the responsiveness of airway smooth muscle. Consequently, the same bronchial challenge may produce a stronger narrowing response when these influences are present than when smooth-muscle responsiveness is considered alone. This relationship makes airway hyperreactivity useful for studying how inflammatory processes modify pharmacological responses in asthma and related respiratory disorders.
The bronchoconstriction produced during airway testing provides a functional endpoint for comparing respiratory treatments. A bronchodilator can be assessed by how it changes the narrowing response, while anti-inflammatory treatments can be examined in relation to the inflammation that amplifies airway responsiveness. These comparisons help connect observed airway outcomes with the effects being investigated.
A bronchial challenge assessment exposes the airways to a challenge agent such as methacholine, which activates muscarinic receptors and provokes bronchoconstriction. Researchers then evaluate the measurable airway response as an indication of sensitivity. This procedure creates a standardized pharmacological stimulus for examining airway narrowing and for comparing responses under different treatment conditions.
Researchers use these measurements to assess airway sensitivity, investigate disease severity, and compare respiratory therapies. The response is especially informative when a study needs a measurable outcome that links a bronchial stimulus with airway narrowing. It therefore supports evaluation of bronchodilators, anti-inflammatory treatments, and drug mechanisms in asthma and related respiratory disorders.
Bronchial airway hyperreactivity connects receptor activation, smooth-muscle responsiveness, inflammation, and measurable bronchoconstriction within one experimental framework. Pharmacologists can use that connection to study how respiratory drugs alter airway responses rather than relying only on a conceptual description of disease. The resulting information supports more precise evaluation of treatment effects and respiratory disease severity.