Biomaterial Database

Leukotriene induction of TxB2 in cultured bovine aortic endothelial cells. 1984

B Dunham, and D Shepro, and H B Hechtman

The leukotrienes (LT) are potent mediators of inflammation, capable of inducing plasma leakage from postcapillary venules and vasoconstriction of terminal arterioles. Some microvascular effects may be attributable to LT stimulation of thromboxane (Tx) synthesis. Incubation of primary cultures of bovine aortic endothelial cells with buffer, LTB4 (10(-8) M) or LTD4 (10(-8)M), resulted in TxA2 production in pg/10(5) cells to the extent of: 67 +/- 20, 571 +/- 180, and 333 +/- 60 respectively, as measured by radioimmunoassay of the stable metabolite TxB2. Endothelial pretreatment with the LTD4 receptor antagonist FPL55712 (10(-5)M) significantly blocked any LTB4- or LTD4-stimulated TxA2 synthesis. Pretreatment with the TxA2 synthetase inhibitor ketoconazole (10(-6)M) also prevented LTB4 of LTD4 stimulation of TxA2. Preincubation with DMTU (10(-5)M), an hydroxyl radical scavenger, decreased LTB4-induced release of TxA2 (405 +/- 40 and 366 +/- 20, respectively). These findings suggest that LT may mediate their inflammatory actions in vascular beds by stimulation of Tx release from endothelial cells.

UI	MeSH Term	Description	Entries
D007654	Ketoconazole	Broad spectrum antifungal agent used for long periods at high doses, especially in immunosuppressed patients.	Nizoral,R-41400,R41,400,R41400,R 41400
D007975	Leukotriene B4	The major metabolite in neutrophil polymorphonuclear leukocytes. It stimulates polymorphonuclear cell function (degranulation, formation of oxygen-centered free radicals, arachidonic acid release, and metabolism). (From Dictionary of Prostaglandins and Related Compounds, 1990)	5,12-HETE,5,12-diHETE,LTB4,Leukotriene B,Leukotriene B-4,Leukotrienes B,5,12 HETE,5,12 diHETE,B-4, Leukotriene,Leukotriene B 4
D002417	Cattle	Domesticated bovine animals of the genus Bos, usually kept on a farm or ranch and used for the production of meat or dairy products or for heavy labor.	Beef Cow,Bos grunniens,Bos indicus,Bos indicus Cattle,Bos taurus,Cow,Cow, Domestic,Dairy Cow,Holstein Cow,Indicine Cattle,Taurine Cattle,Taurus Cattle,Yak,Zebu,Beef Cows,Bos indicus Cattles,Cattle, Bos indicus,Cattle, Indicine,Cattle, Taurine,Cattle, Taurus,Cattles, Bos indicus,Cattles, Indicine,Cattles, Taurine,Cattles, Taurus,Cow, Beef,Cow, Dairy,Cow, Holstein,Cows,Dairy Cows,Domestic Cow,Domestic Cows,Indicine Cattles,Taurine Cattles,Taurus Cattles,Yaks,Zebus
D002478	Cells, Cultured	Cells propagated in vitro in special media conducive to their growth. Cultured cells are used to study developmental, morphologic, metabolic, physiologic, and genetic processes, among others.	Cultured Cells,Cell, Cultured,Cultured Cell
D002867	Chromones		1,4-Benzopyrones,Chromone,1,4 Benzopyrones
D004727	Endothelium	A layer of epithelium that lines the heart, blood vessels (ENDOTHELIUM, VASCULAR), lymph vessels (ENDOTHELIUM, LYMPHATIC), and the serous cavities of the body.	Endotheliums
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
D013929	Thromboxane B2	A stable, physiologically active compound formed in vivo from the prostaglandin endoperoxides. It is important in the platelet-release reaction (release of ADP and serotonin).	B2, Thromboxane
D013931	Thromboxanes	Physiologically active compounds found in many organs of the body. They are formed in vivo from the prostaglandin endoperoxides and cause platelet aggregation, contraction of arteries, and other biological effects. Thromboxanes are important mediators of the actions of polyunsaturated fatty acids transformed by cyclooxygenase.	Thromboxane