苏科商城

无气味。微带酸味。在干燥空气中稳定，在潮湿空气中逐渐水解成水杨酸和乙酸。遇沸水或溶于氢氧化钠碱溶液和碳酸碱溶液中全部分解。溶于乙醇、乙醚和氯仿。检定锰。有机合成。 乙酰水杨酸靠抑制环化加氧酶（cyclooxygenase，前列腺素H合成酶)阻止前列腺索的生产，特别是针对COX-1同种型有很高的选择性。其抗血栓效果就是由于抑制了血小板中起凝血和血小板凝聚作用的COX-1。

Aspirin is an antiinflammatory compound that inhibits NFκB, cylooxygenase-1 (Cox-1), and cyclooxygenase-2 (Cox-2). NFκB is a transcription factor that plays an important role in the expression of cellular and viral genes, which regulate the inflammatory response and infection. Adhesion molecules IL-1 and IL-6 are genes regulated by NFκB. Along with sodium salicylate, aspirin has been shown to block the long terminal repeat from the human immunodeficiency virus and the Ig κ enhancer from NFκB dependent transcription. Research indicates that aspirin acts at a site downstream of glutamate receptors and blocks induction of NFκB mediated by glutamate. Additional studies suggest that aspirin and sodium salicylate specifically inhibit IKKβ, which results in the blocking of NFκB genes responsible for the inflammatory response. Aspirin has also been described to elevate extracellular adenosine levels, downregulate the expression and activity of inducible NOS, decrease the levels of adenosine triphosphate, act on multiple mitogen-activated protein kinase activities, and block the uncoupling of oxidative phosphorylation. Studies reveal that aspirin alters the equilibrium of Mcl-1/Noxa, giving rise to apoptosis of leukemia cells, independent of NFκB and MAPKs.
An inhibitor of COX-1 (cylooxygenase) and NFκB.