9-(4'-dimethylaminophenyl)-2,6,7-trihydroxy-xanthene-3-one is a Potentially Novel Antiplatelet Drug which Antagonizes the Effect of Thromboxane A2
作者:Lenka Applova、Elma Veljovic、Samija Muratovic、Jana Karlickova、Katerina Macakova、Davorka Zavrsnik、Luciano Saso、Kemal Duric、Premysl Mladenka
DOI:10.2174/1573406413666171010102535
日期:2018.2.6
Background: Currently, used oral antiplatelet drugs are both limited and associated
with the risk of treatment failure/resistance. Research in this area is hence highly desired. A series
of xanthene-3-ones derivatives, we had synthesized, showed us that these derivatives had antiplatelet
activity. As far as we know, no research on the effects of xanthen-3-ones in this area has been
done.
Objective: The aim was to study the antiplatelet potential of a series of synthesised 9-phenylxanthene-
3-ones and to find the ideal structural feature(s) for antiplatelet potential and determine
the mechanism of action.
Methods: The compounds were synthesized from 1,2,4-triacetoxybenzene and various benzaldehydes.
The reaction proceeded smoothly under acidic alcoholic conditions, furnishing the desired
products in good yields. The compounds were first screened in whole human blood where platelet
aggregation was induced by arachidonic acid. Further analysis was targeted at search of the
mechanism of action.
Results: Initial screening showed that a majority of the synthesized derivatives had substantial antiplatelet
potential. None of the compounds were able to block cyclooxygenase 1 or thromboxane
synthase. The mechanism appeared to be based on antagonism of thromboxane effects. The most
potent compound 9-(4'-dimethylaminophenyl)-2,6,7-trihydroxy-xanthene-3-one had better potential
to block collagen induced platelet aggregation than clinically used acetylsalicylic acid.
Conclusion: The last mentioned derivative is promising for further in vivo testing.
背景:目前,常用的口服抗血小板药物既有局限性,又有治疗失败/耐药性的风险。因此,这一领域的研究非常值得期待。我们合成的一系列呫吨-3-酮衍生物表明,这些衍生物具有抗血小板活性。据我们所知,目前还没有人研究过 3-氧杂蒽酮在这一领域的作用。 目标:目的是研究一系列合成的 9-苯基氧杂蒽-3-酮的抗血小板潜能,找到具有抗血小板潜能的理想结构特征,并确定其作用机制。 方法:这些化合物由 1,2,4-三乙酰氧基苯和各种苯甲醛合成,反应在酸性酒精条件下顺利进行,并以良好的收率获得所需的产物。这些化合物首先在花生四烯酸诱导血小板聚集的人体全血中进行了筛选。结果:初步筛选结果表明,大部分合成的衍生物都具有很强的抗血小板潜力。没有一种化合物能够阻断环氧化酶 1 或血栓素合成酶。其机理似乎是基于血栓素的拮抗作用。最有效的化合物 9-(4'-二甲基氨基苯基)-2,6,7-三羟基-氧杂蒽-3-酮在阻断胶原诱导的血小板聚集方面的潜力优于临床常用的乙酰水杨酸。 结论:最后提到的衍生物有望用于进一步的体内测试。