Five prenylflavonoids and two prenylchalcones from Artocarpus lowii King, A. scortechinii King and A. teysmanii Miq., and acetylated derivatives of cycloheterophyllin and artonin E were investigated for their ability to inhibit arachidonic acid (AA), collagen and adenosine diphosphate (ADP)-induced platelet aggregation in human whole blood by using an electrical impedance method. Among the tested compounds, only cycloheterophyllin inhibited AA-induced platelet aggregation with an IC50 value of 100.9 μM. It also showed strong inhibition against ADP-induced aggregation, with an IC50 value of 57.1 μM. Isobavachalcone, 2′,4′-dihydroxy-4-methoxy-3′-prenyldihydrochalcone, cycloartobiloxanthone, artonin E and artonin E triacetate showed selective inhibition against ADP-induced aggregation, with IC50 values ranging from 55.3 to 192.0 μM, but did not show such effect against other inducers.
采用电阻抗法研究了从Artocarpus lowii King、A. scortechinii King和A. teysmanii Miq.中提取的5种前酰
黄酮类化合物和2种前酰
查尔酮类化合物,以及环
茶碱和
青蒿素E的乙酰化衍
生物对
花生四烯酸(
AA)、
胶原蛋白和
二磷酸腺苷(
ADP)诱导的人全血血小板聚集的抑制能力。在测试的化合物中,只有环
茶碱能抑制
AA 诱导的血小板聚集,其 IC50 值为 100.9 μM。它对
ADP 诱导的血小板聚集也有很强的抑制作用,IC50 值为 57.1 μM。异巴夏尔
酮、2′,4′-二羟基-
4-甲氧基-3′-异
戊烯基二
氢查尔酮、环木菠萝
蒽酮、
青蒿素 E 和
青蒿素 E
三乙酸酯对
ADP 诱导的聚集有选择性抑制作用,IC50 值为 55.3 至 192.0 μM,但对其他诱导剂没有抑制作用。