In vitro: |
Natural Med., 2005, 59(5):241-4. | Antiplatelet Aggregatory Effects of the Constituents Isolated from the Flower of Cartham.ua tinctorius[Reference: WebLink] | METHODS AND RESULTS: Four constituents, 6-hydroxykaempferol 3,6,7-tri-O-glucoside (1), 6-hydroxykaempferol 3-O-rutinoside-6-O-glucoside (2), 6-hydroxykaempferol 3,6-di-O-glucoside (6-Hydroxykaempferol 3,6-diglucoside,3), and syringin (4) were isolated from the flower of Carthamus tinctorius L. and were examined for the inhibitory effects on platelet aggregation. The platelet aggregation was monitored by a platelet aggregometer employing a laser-scattering method. The compounds were identified on the basis of NMR spectral data.
CONCLUSIONS:
Compound 1, 3 and 4 inhibited platelet aggregation induced by collagen. Compound 4 also showed an antiplatelet aggregatory effect when the platelet aggregation was induced by adenosine 5'-diphosphate (ADP). However, 2 showed no inhibitory effect on platelet aggregation induced by collagen or ADP. Furthermore, 1 and 3 showed weak inhibitory effects on the ADP-induced platelet aggregation. |
|