Abstract: Objective To investigate the effect of morroniside on cycloxygenase (Cox) in the condition of platelet aggregation inducedby adenosine diphosphate (ADP) in rabbits. Methods The levels of Cox induced by ADP in different groups were detected by enzyme-linked immunosorbent assay (ELISA). Results Compared with the control group, all the morroniside groups significantly inhibited theincrease of Cox induced by ADP (P<0.001), which had concentration dependence, and the inhibition rate of high dose group was 30%. ConclusionMorroniside can decrease the level of Cox and it may be the mechanism of morroniside on inhibiting the platelet aggregation inducedby ADP in rabbits.

Key words: morroniside, platelet aggregation, cycloxygenase, rabbits