血栓素A_2(TXA_2)是花生四烯酸(AA)的重要代谢产物之一,具有诱导血小板聚集,降低cAMP水平和收缩血管等作用。在37℃下,性质极不稳定,半衰期仅30秒,很快水解为较稳定的代谢产物TXB_2。虽然测定TXA_2和TXB_2分别可用生物测定和薄层层析,质谱分析等法,但用放射免疫分析法(RIA)不仅特 Thromboxane A 2 (TXA 2) is one of the important metabolites of arachidonic acid (AA), and has the effects of inducing platelet aggregation, decreasing cAMP level and contracting blood vessels. At 37 ° C, it is very unstable in nature and has a half-life of only 30 seconds, rapidly hydrolyzing to the more stable metabolite TXB_2. Although the determination of TXA_2 and TXB_2 bioassay and TLC, mass spectrometry and other methods, but by radioimmunoassay (RIA) is not only special