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A method for monitoring ADP-induced thromboembolism in mice
Abstract:
A method for monitoring ADP-induced thromboembolism in mice by means of the measurement of respiratory rate and depth was studied. The measurement were accurately carried out with a new method devised by us. In mice intravenously injected with 5-40 mg ADP/kg, it was found that the respiratory rate decreased transiently and dose-responsively, and that the platelet count also decreased transiently. On the other hand, no decrease in respiratory rate after administration of ADP was observed in neuraminidase-pretreated mice, in which the platelet count was significantly reduced. In the histological examination, platelet thrombi formed in the pulmonary vessels were observed 10 sec after administration of 10 and 40 mg/kg of ADP in mice which had not been treated with neuraminidase. The extent of thromboembolism at the dose of 40 mg/kg showed a tendency to be more marked than that at 10 mg/kg. Pretreatment with 300 mg dipyridamole/kg p.o. prevented the respiratory depression at 40 mg ADP/kg. However, with 10 mg dimorpholamine/kg i.v. or 30 mg warfarin/kg p.o., no preventive effect was observed. Therefore, it was concluded that it is possible to monitor ADP-induced thromboembolism in mice by means of the accurate measurement of the respiratory rate and depth.
Insights
Researchers developed a novel method to monitor adenosine diphosphate (ADP)-induced thromboembolism in mice by measuring respiratory rate and depth. This technique accurately reflects ADP-induced changes, offering a new tool for thrombosis research.
Area of Science:
- Pharmacology
- Physiology
- Thrombosis Research
Background:
- Thromboembolism is a critical condition.
- Adenosine diphosphate (ADP) plays a key role in platelet aggregation and thrombosis.
- Accurate monitoring of ADP-induced thromboembolism is essential for developing effective treatments.
Purpose of the Study:
- To investigate a new method for monitoring ADP-induced thromboembolism in mice.
- To assess the correlation between respiratory changes and thromboembolic events.
- To evaluate the efficacy of dipyridamole, dimorpholamine, and warfarin in preventing ADP-induced thromboembolism.
Main Methods:
- Development of a novel method for measuring respiratory rate and depth in mice.
- Intravenous administration of varying doses of ADP (5-40 mg/kg) to mice.
- Histological examination of pulmonary vessels to assess platelet thrombi formation.
- Pretreatment of mice with neuraminidase, dipyridamole, dimorpholamine, or warfarin.
Main Results:
- ADP administration caused a dose-dependent decrease in respiratory rate and platelet count.
- Neuraminidase pretreatment abolished respiratory depression and reduced platelet count.
- Platelet thrombi were observed in pulmonary vessels post-ADP administration.
- Dipyridamole pretreatment prevented respiratory depression, while dimorpholamine and warfarin did not.
Conclusions:
- Respiratory rate and depth measurement is a viable method for monitoring ADP-induced thromboembolism in mice.
- This method provides an accurate and sensitive assessment of thrombotic events.
- Findings support dipyridamole's anti-thrombotic effects in this model.