11-dehydro Thromboxane B2-d4 (Synonyms: 11-dehydro TXB2-d4, 11keto TXB2d4)

11-dehydro Thromboxane B₂-d₄ (TXB₂-d₄) is intended for use as an internal standard for the quantification of 11-dehydro TXB₂ by stable isotope dilution MS. TXB₂ is released in substantial quantities from aggregating platelets and metabolized during circulation to 11-dehydro TXB₂ and 2,3-dinor TXB₂.¹ 11-dehydro TXB₂ is one of the main plasma metabolites of TXB₂ and can be used as a marker for in vivo TXA₂ synthesis.^1,2,3,4 The mean plasma level in human males is 0.9-4.3 pg/ml and the half life is 45-60 minutes.^2,3,4

1.Ciabattoni, G., Pugliese, F., Davi, G., et al.Fractional conversion of thromboxane B2 to urinary 11-dehydrothromboxane B2 in manBiochimica et Biophysica Acta99266-70(1989) 2.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 spectrometryAdvances in Prostaglandin, Thromboxane, and Leukotriene Research1587-90(1985) 3.Takasaki, W., Nakagawa, A., Tanaka, Y., et al.Enzyme immunoassay of human plasma 11-dehydrothromboxane B2Thrombosis Research63331-341(1991) 4.Catella, F., Healy, D., Lawson, J.A., et al.11-dehydro Thromboxane B2: A quantitative index of thromboxane A2 formation in the human circulationProceedings of the National Academy of Sciences of the United States of America835861-5865(1986)