Biomaterial Database

[Ovalbumin sensitization affects nonadrenergic noncholinergic relaxation response on guinea-pig tracheal smooth muscle]. 2000

K Takatsuki, and Y Nishimura, and H Maeda, and M Yokoyama

First Department of Internal Medicine, Kobe University School of Medicine.

We investigated the effects of anaphylactic challenge on nonadrenergic noncholinergic (NANC) relaxation response to electrical field stimulation (EFS) or to aminophylline in sensitized guinea pig tracheal smooth muscles. An anaphylactic challenge with ovalbumin (OA) reduced the relaxation response to EFS (20 V. 5 Hz. 300 pulse. duration 1 msec.), but the relaxation response to aminophylline was not affected by OA exposure. NG-monomethyl L-arginine, a nitric oxide (NO) synthesis inhibitor, reduced the relaxation response to EFS in the OA sensitized guinea pig. While the relaxation response to EFS on the sensitized guinea pig tracheal smooth muscle was significantly attenuated compared with that on the non-sensitized guinea-pig, there was no significant difference between the tracheal strip of OA challenge group and that of control group in sensitized guinea-pig under the existence of NO synthesis inhibitor. These results suggest that the attenuation of NANC relaxation response associated with sensitization plays an important role in airway hyperreactivity and is responsible for the decrease in NO amount.

UI	MeSH Term	Description	Entries
D009126	Muscle Relaxation	That phase of a muscle twitch during which a muscle returns to a resting position.	Muscle Relaxations,Relaxation, Muscle,Relaxations, Muscle
D009130	Muscle, Smooth	Unstriated and unstriped muscle, one of the muscles of the internal organs, blood vessels, hair follicles, etc. Contractile elements are elongated, usually spindle-shaped cells with centrally located nuclei. Smooth muscle fibers are bound together into sheets or bundles by reticular fibers and frequently elastic nets are also abundant. (From Stedman, 25th ed)	Muscle, Involuntary,Smooth Muscle,Involuntary Muscle,Involuntary Muscles,Muscles, Involuntary,Muscles, Smooth,Smooth Muscles
D009569	Nitric Oxide	A free radical gas produced endogenously by a variety of mammalian cells, synthesized from ARGININE by NITRIC OXIDE SYNTHASE. Nitric oxide is one of the ENDOTHELIUM-DEPENDENT RELAXING FACTORS released by the vascular endothelium and mediates VASODILATION. It also inhibits platelet aggregation, induces disaggregation of aggregated platelets, and inhibits platelet adhesion to the vascular endothelium. Nitric oxide activates cytosolic GUANYLATE CYCLASE and thus elevates intracellular levels of CYCLIC GMP.	Endogenous Nitrate Vasodilator,Mononitrogen Monoxide,Nitric Oxide, Endothelium-Derived,Nitrogen Monoxide,Endothelium-Derived Nitric Oxide,Monoxide, Mononitrogen,Monoxide, Nitrogen,Nitrate Vasodilator, Endogenous,Nitric Oxide, Endothelium Derived,Oxide, Nitric,Vasodilator, Endogenous Nitrate
D010047	Ovalbumin	An albumin obtained from the white of eggs. It is a member of the serpin superfamily.	Serpin B14
D012130	Respiratory Hypersensitivity	A form of hypersensitivity affecting the respiratory tract. It includes ASTHMA and RHINITIS, ALLERGIC, SEASONAL.	Airway Hyperresponsiveness,Hypersensitivity, Respiratory,Airway Hyper-Responsiveness,Airway Hyper Responsiveness,Airway Hyperresponsivenesses,Hyper-Responsiveness, Airway,Hyperresponsiveness, Airway,Respiratory Hypersensitivities
D004558	Electric Stimulation	Use of electric potential or currents to elicit biological responses.	Stimulation, Electric,Electrical Stimulation,Electric Stimulations,Electrical Stimulations,Stimulation, Electrical,Stimulations, Electric,Stimulations, Electrical
D005260	Female		Females
D006168	Guinea Pigs	A common name used for the genus Cavia. The most common species is Cavia porcellus which is the domesticated guinea pig used for pets and biomedical research.	Cavia,Cavia porcellus,Guinea Pig,Pig, Guinea,Pigs, Guinea
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
D014132	Trachea	The cartilaginous and membranous tube descending from the larynx and branching into the right and left main bronchi.	Tracheas