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Antithrombotic Effect of Fermented Ophiopogon japonicus in Thrombosis-Induced Rat Models.

In this study, the antithrombotic and thrombolytic ability of second fermented extract of Ophiopogon japonicus (FEOJ) was verified in thrombosis-induced rats. Thrombosis was induced by oral administration of 2% carrageenan for 4 weeks. Five experimental groups (n = 9/group) involved in the study were control group, thrombosis group, low-dose FEOJ group (2 mL/kg, low-dose Ophiopogon japonicus [LOJ]), middle-dose FEOJ group (6 mL/kg, medium-dose Ophiopogon japonicus [MOJ]), and high-dose FEOJ group (12 mL/kg, high-dose Ophiopogon japonicus [HOJ]). The clotting time (CT), bleeding time (BT), prothrombin time (PT), activated partial thromboplastin time (APTT), and fibrinogen (FBG) were assessed in blood samples, and histological studies were performed on liver and lung tissues. The results demonstrated delayed CT only in MOJ and HOJ groups and delayed BT in all FEOJ groups compared with those in thrombosis and control groups (P < .05). Similarly, APTT was significantly delayed only in MOJ and HOJ groups, and PT was significantly delayed in all FEOJ groups, compared with those in control and thrombosis groups (P < .05). Although concentrations of FBG were similar in control, thrombosis, and LOJ groups, the tendency for decreased concentration of FBG (statistically nonsignificant) in MOJ and HOJ groups has been observed. Histological examination of livers and lungs revealed that thrombosis was partially improved in FEOJ group compared with the thrombosis group. In conclusion, CT, BT, PT, and APTT were prolonged in FEOJ group more than in control and thrombosis groups, thereby, depicting antithrombotic and thrombolytic effects. However, concentration-dependent effects of FEOJ were more prominent in MOJ and HOJ groups than in the LOJ group.