Biomaterial Database

Tris(hydroxymethyl)aminomethane inhibits calcium uptake in vascular smooth muscle. 1979

P D Turlapaty, and B T Altura, and B M Altura

This report demonstrates that the commonly used buffering agent Tris(hydroxymethyl)aminomethane (Tris) in concentrations of 5 and 30 mM inhibits calcium (Ca2+) uptake in both rat aortic and portal venous smooth muscle. The data indicates that total exchangeable Ca2+ in portal vein is reduced by about 35% in 5 or 30 mM Tris, while the intracellular exchangeable Ca2+ is not significantly altered. On the other hand, in aortic smooth muscle, while 30 mM Tris reduces total exchangeable Ca2+ by about 20%, intracellular Ca2+ is reduced by 44% in 5 mM Tris and by 55% in 30 mM Tris. The present studies, thus, reveal that Tris exerts significant inhibitory effects on exchangeability and transmembrane movement of Ca2+ in at least two different types of smooth muscle.

UI	MeSH Term	Description	Entries
D008297	Male		Males
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
D009928	Organ Specificity	Characteristic restricted to a particular organ of the body, such as a cell type, metabolic response or expression of a particular protein or antigen.	Tissue Specificity,Organ Specificities,Specificities, Organ,Specificities, Tissue,Specificity, Organ,Specificity, Tissue,Tissue Specificities
D011169	Portal Vein	A short thick vein formed by union of the superior mesenteric vein and the splenic vein.	Portal Veins,Vein, Portal,Veins, Portal
D002118	Calcium	A basic element found in nearly all tissues. It is a member of the alkaline earth family of metals with the atomic symbol Ca, atomic number 20, and atomic weight 40. Calcium is the most abundant mineral in the body and combines with phosphorus to form calcium phosphate in the bones and teeth. It is essential for the normal functioning of nerves and muscles and plays a role in blood coagulation (as factor IV) and in many enzymatic processes.	Coagulation Factor IV,Factor IV,Blood Coagulation Factor IV,Calcium-40,Calcium 40,Factor IV, Coagulation
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
D001011	Aorta	The main trunk of the systemic arteries.	Aortas
D001693	Biological Transport, Active	The movement of materials across cell membranes and epithelial layers against an electrochemical gradient, requiring the expenditure of metabolic energy.	Active Transport,Uphill Transport,Active Biological Transport,Biologic Transport, Active,Transport, Active Biological,Active Biologic Transport,Transport, Active,Transport, Active Biologic,Transport, Uphill
D014325	Tromethamine	An organic amine proton acceptor. It is used in the synthesis of surface-active agents and pharmaceuticals; as an emulsifying agent for cosmetic creams and lotions, mineral oil and paraffin wax emulsions, as a biological buffer, and used as an alkalizer. (From Merck, 11th ed; Martindale, The Extra Pharmacopoeia, 30th ed, p1424)	Tris Buffer,Trisamine,Trometamol,Tri(hydroxymethyl)aminomethane,Tris(hydroxymethyl)aminomethane,Tris-Magnesium(II)-Potassium Chloride Buffer,Tris-Mg(II)-KCl Buffer,Trizma
D051381	Rats	The common name for the genus Rattus.	Rattus,Rats, Laboratory,Rats, Norway,Rattus norvegicus,Laboratory Rat,Laboratory Rats,Norway Rat,Norway Rats,Rat,Rat, Laboratory,Rat, Norway,norvegicus, Rattus