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INHIBITORY EFFECT OF FLAVONOLS OF CARTHAMUS TINCTORIUS L. AGAINST RABBIT PLATELET ACTIVATION INDUCED BY PLATELET ACTIVATING FACTOR
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- Author:
- No author available
- Journal Title:
- ACTA PHARMACEUTICA SINICA
- Issue:
- 12
- DOI:
- 10.3321/j.issn:0513-4870.2001.12.001
- Key Word:
- 杨梅素;山奈酚;血小板聚集;血小板激活因子;5-羟色胺;游离钙
Abstract： 目的观察红花黄酮成分杨梅素(Myr)和山奈酚(Kae)对血小板激活因子(PAF)诱导的兔洗涤血小板聚集、5-HT释放及血小板内游离钙离子浓度升高的影响.方法以比浊法测定家兔洗涤血小板(WRP)聚集,邻苯二甲醛(OPT)荧光法测定5-HT浓度,Fura-2 荧光探针测定血小板内游离钙离子浓度.结果 Myr和Kae体外呈浓度依赖性地抑制PAF诱发的WRP聚集及5-HT释放.Myr抑制WRP聚集的IC 50为17.5 μmol·L-1;抑制5-HT释放的IC50为64.1 μmol·L -1.Kae抑制聚集、释放作用的IC50分别为73.7 μmol·L-1和128 μmol·L-1;同时Myr和Kae均能明显抑制PAF引起的血小板内游离钙增高.结论 Myr和Kae可抑制PAF诱导的血小板活化作用.
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