Abstract
The influence of dietary bacillus natto productive protein (BNPP) on endogenous thrombolysis was investigated in the rat. Animals were given a standard feed for 14 weeks, to which 0.2 or 1% BNPP was added. Thrombolysis was evaluated using an He-Ne laser-induced thrombosis model in mesenteric microvessels. Changes in thrombus volume, reflecting thrombolysis, decreased to 82% of the initial value in the control group. In contrast, the thrombus volume decreased to 67% in the animals fed 0.2% BNPP, and decreased to 51% in the group given 1% BNPP. The extent of thrombolysis in the 1% BNPP group was equivalent to that seen in animals treated with a bolus intravenous infusion of 0.2 mg/kg tissue plasminogen activator. The results demonstrated that the dietary administration of BNPP enhanced endogenous thrombolysis in a dose-dependent manner. Argatroban (2 mg/kg/h) enhanced endogenous fibrinolysis only in control animals, but not in the BNPP groups. The results support the suggestion that dietary supplementation with BNPP may provide a simple means to promote fibrinolysis not only in the treatment of thromboembolism but also in the prevention of venous occlusion.
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