| 货号 | 19668-1ea |
| 描述 | This mixture contains a collection of metabolites of the major vasoactive eicosanoids, prostaglandin I2(PGI2; Item No. 18220) and thromboxane A2(TXA2), as well as of several oxylipins postulated to regulate vasoconstriction. The mixture is supplied in an amber ampule in which the headspace has been purged with argon to prevent lipid oxidation. This product has been designed for direct use in LC-MS applications. The solution may be serially diluted for preparation of calibrators and QC standards and/or used directly as a system suitability standard or tuning standard. After opening, we recommend that the mixture be transferred immediately to a 1 ml glass screw cap vial, to prevent solvent evaporation, and stored at -20°C. The mixture should be discarded after multiple freeze/thaw cycles. Whereas PGI2 is a potent vasodilator and inhibitor of human platelet aggregation, TXA2 causes irreversible platelet aggregation and contraction of vascular and bronchial smooth muscle. Because both are rapidly metabolized, their urinary metabolites (11-dehydro TXB2 (Item No. 19500), 2,3-dinor TXB2 (Item No. 19050), 11-dehydro-2,3-dinor TXB2 (Item No. 19510), and 2,3-dinor-6-keto PGF1α (Item No. 15120), serve as useful markers for their synthesis.1,2,3,4,5,6 The diol metabolites of various epoxyeicosatrienoic acids (EETs) have been used to document the oxylipins involved in vasoconstriction and hypertension.7,8,9 |
| 供应商 | Cayman |
| 应用文献 | |
| 1.Ishibashi, M.,Watanabe, K.,Ishizaki, F., et al. Dimethylisopropylsilyl ether derivative in gas chromatography/mass spectrometry of 2,3-dinor-11-dehydrothromboxane B2. Biological Mass Spectrometry 20, 399-407 (1991). 2.Lellouche, F.,Fradin, A.,FitzGerald, G., et al. Enzyme immunoassay measurement of the urinary metabolites of thromboxane A2 and prostacyclin. Prostaglandins 40, 297-310 (1990). 3.Perneby, C.,Granström, E.,Beck, O., et al. Optimization of an enzyme immunoassay for 11-dehydro-thromboxane B2 in urine: Comparison with GC-MS. Thrombosis Research 96, 427-436 (1999). 4.Ciabattoni, G.,Pugliese, F.,Davi, G., et al. Fractional conversion of thromboxane B2 to urinary 11-dehydrothromboxane B2 in man. Biochimica et Biophysica Acta 992, 66-70 (1989). 5.Fitzgerald, G.A.,Lawson, J.,Blair, I.A., et al. Analysis of urinary metabolites of thromboxane and prostacyclin by negative-ion chemical-ionization gas chromatography/mass spectrometry. Advances in Prostaglandin, Thromboxane, and Leukotriene Research 15, 87-90 (1985). 6.Krakoff, L.R.,Vlachakis, N.,Mendlowitz, M., et al. Differential effect of prostaglandin A1 in hypertensive patients with low, normal and high renin. Clinical Science and Molecular Medicine 48, 311s-313s (1975). 7.McGiff, J.C. and Quilley, J. 20-HETE and the kidney: Resolution of old problems and new beginnings. American Journal of Physiology 277, R607-R623 (1999). 8.Zhang, J.Y.,Prakash, C.,Yamashita, K., et al. Regiospecific and enantioselective metabolism of 8,9-epoxyeicosatrienoic acid by cyclooxygenase. Biochemical and Biophysical Research Communications 183, 138-143 (1992). 9.Fang, X.,Kaduce, T.L.,Weintraub, N.L., et al. Functional implications of a newly characterized pathway of 11,12-epoxyeicosatrienoic acid metabolism in arterial smooth muscle. Circulation Research 79, 784-793 (1996). | |
| 运输条件 | Wet ice in continental US; may vary elsewhere |
| 存放说明 | -20 |
| 稳定性 | ≥ 1 year |
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