Biomaterial Database

The role of increased airway microvascular permeability and plasma exudation in asthma. 1990

K F Chung, and D F Rogers, and P J Barnes, and T W Evans

Dept of Thoracic Medicine, National Heart and Lung Institute, London, UK.

Airway oedema and inflammation are recognized as cardinal features of asthma, resulting from increase microvascular permeability of the bronchial circulation with the exudation of plasma and inflammatory cells into the airway lumen. Resistance to airflow is increased and the epithelium is disrupted either directly or by cytotoxic proteins derived from migrating inflammatory cells. Such mediators include bradykinin, platelet-activating factor (PAF), leukotrienes and histamine. Antigen-induced and neurogenic inflammation, generated by immunoglobulin E (IgE) and neuropeptides respectively, may also contribute to oedema generation. Assessment of increased bronchial vascular permeability in animals has largely involved measurement of the extravasation of radiolabelled albumin or protein-bound dyes. Non-invasive techniques are less reliable in humans, but measurement of the rate of clearance of inhaled particles labelled with isotope may prove successful. Airway oedema appears to be an important feature of asthma and future research may be aimed at developing drugs that specifically prevent airway microvascular leakage.

UI	MeSH Term	Description	Entries
D007249	Inflammation	A pathological process characterized by injury or destruction of tissues caused by a variety of cytologic and chemical reactions. It is usually manifested by typical signs of pain, heat, redness, swelling, and loss of function.	Innate Inflammatory Response,Inflammations,Inflammatory Response, Innate,Innate Inflammatory Responses
D002199	Capillary Permeability	The property of blood capillary ENDOTHELIUM that allows for the selective exchange of substances between the blood and surrounding tissues and through membranous barriers such as the BLOOD-AIR BARRIER; BLOOD-AQUEOUS BARRIER; BLOOD-BRAIN BARRIER; BLOOD-NERVE BARRIER; BLOOD-RETINAL BARRIER; and BLOOD-TESTIS BARRIER. Small lipid-soluble molecules such as carbon dioxide and oxygen move freely by diffusion. Water and water-soluble molecules cannot pass through the endothelial walls and are dependent on microscopic pores. These pores show narrow areas (TIGHT JUNCTIONS) which may limit large molecule movement.	Microvascular Permeability,Permeability, Capillary,Permeability, Microvascular,Vascular Permeability,Capillary Permeabilities,Microvascular Permeabilities,Permeabilities, Capillary,Permeabilities, Microvascular,Permeabilities, Vascular,Permeability, Vascular,Vascular Permeabilities
D004487	Edema	Abnormal fluid accumulation in TISSUES or body cavities. Most cases of edema are present under the SKIN in SUBCUTANEOUS TISSUE.	Dropsy,Hydrops,Anasarca
D004848	Epithelium	The layers of EPITHELIAL CELLS which cover the inner and outer surfaces of the cutaneous, mucus, and serous tissues and glands of the body.	Mesothelium,Epithelial Tissue,Mesothelial Tissue,Epithelial Tissues,Mesothelial Tissues,Tissue, Epithelial,Tissue, Mesothelial,Tissues, Epithelial,Tissues, Mesothelial
D005119	Extravasation of Diagnostic and Therapeutic Materials	The escape of diagnostic or therapeutic material from the vessel into which it is introduced into the surrounding tissue or body cavity.	Extravasation of Contrast Media,Extravasation of Diagnostic, Therapeutic Materials,Contrast Media Extravasation
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D001249	Asthma	A form of bronchial disorder with three distinct components: airway hyper-responsiveness (RESPIRATORY HYPERSENSITIVITY), airway INFLAMMATION, and intermittent AIRWAY OBSTRUCTION. It is characterized by spasmodic contraction of airway smooth muscle, WHEEZING, and dyspnea (DYSPNEA, PAROXYSMAL).	Asthma, Bronchial,Bronchial Asthma,Asthmas