RESUMEN
Compound L-36, a new derivative of 6H-1,3,4-thiadiazine, was studied in in vitro and in vivo experiments. This compound exhibits high antiplatelet and antithrombogenic activity. In in vitro experiments, compound L-36 by its antiplatelet activity (by IC50) was superior to acetylsalicylic acid by 9.4 times. In in vivo experiments, compound L-36 by its ED50 value was close to the comparison drug. On the model of pulmonary artery thrombosis, compound L-36 ensured better survival of experimental animals than acetylsalicylic acid. Morphological studies showed that compound L-36 effectively attenuated the thrombosis processes in the pulmonary tissue induced by intravenous injection of a thrombogenic mixture (epinephrine and collagen).
Asunto(s)
Aspirina , Fibrinolíticos , Inhibidores de Agregación Plaquetaria , Agregación Plaquetaria , Tiadiazinas , Animales , Inhibidores de Agregación Plaquetaria/farmacología , Inhibidores de Agregación Plaquetaria/química , Tiadiazinas/farmacología , Tiadiazinas/química , Fibrinolíticos/farmacología , Fibrinolíticos/química , Agregación Plaquetaria/efectos de los fármacos , Aspirina/farmacología , Masculino , Trombosis/tratamiento farmacológico , Trombosis/prevención & control , Ratas , Arteria Pulmonar/efectos de los fármacos , Colágeno , Epinefrina/farmacología , Ratones , Plaquetas/efectos de los fármacosRESUMEN
We studied the effect of antiviral agent riamilovir on ADP-induced platelet aggregation in the absence and presence of LPS. Unlike acetylsalicylic acid (reference drug), riamilovir did not exhibit antiplatelet effect in vitro. However, it markedly suppressed platelet reactivity in LPS-treated blood samples and was 2.2-fold superior to acetylsalicylic acid in terms of IC50 value. In in vivo experiments, riamilovir under conditions of hypercytokinemia blocked platelet aggregation in rats by 64%.
Asunto(s)
Lipopolisacáridos , Inhibidores de Agregación Plaquetaria , Animales , Antivirales/farmacología , Aspirina/farmacología , Plaquetas , Lipopolisacáridos/farmacología , Agregación Plaquetaria , Inhibidores de Agregación Plaquetaria/farmacología , Ratas , Triazinas , TriazolesRESUMEN
We studied the effect of Angipur on the process of experimental thrombosis induced by damage to the carotid artery wall by surface application of 50% ferric chloride (III) solution in rats without comorbidities and with isoproterenol-induced myocardial infarction. In animals without comorbidities, Angipur administered intravenously was 1.2 times less effective, in terms of ED50, than the well-known inhibitor of GPIIb/IIIa platelet receptors tirofiban. However, under conditions of non-coronary myocardial infarction, Angipur significantly prolonged the time of thrombus formation and exhibited 1.4-fold higher activity than the reference drug tirofiban.
Asunto(s)
Infarto del Miocardio , Trombosis , Animales , Fibrinolíticos/farmacología , Fibrinolíticos/uso terapéutico , Isoproterenol/efectos adversos , Infarto del Miocardio/inducido químicamente , Infarto del Miocardio/tratamiento farmacológico , Inhibidores de Agregación Plaquetaria/farmacología , Complejo GPIIb-IIIa de Glicoproteína Plaquetaria/efectos adversos , Ratas , Trombosis/inducido químicamente , Trombosis/tratamiento farmacológico , TirosinaRESUMEN
Antithrombotic activity of a new orally administered antiplatelet compound DAB-15 was compared to that of acetylsalicylic acid, ticlopidine, and clopidogrel in the experimental model of arterial thrombosis in rats caused by surface application of 50% ferric chloride (III) on the carotid artery. Compound DAB-15 exerted a dose-dependent antithrombotic effect and was superior to acetylsalicylic acid, ticlopidine and clopidogrel by 5, 7, and 4.9 times, respectively (by ED50). This necessitates studying of the action mechanism of this antiplatelet compound with consideration of its influence on different stages of the pathogenesis of platelet aggregation.
Asunto(s)
Azepinas/administración & dosificación , Bencimidazoles/administración & dosificación , Trombosis de las Arterias Carótidas/tratamiento farmacológico , Fibrinolíticos/administración & dosificación , Administración Oral , Animales , Aspirina/administración & dosificación , Evaluación Preclínica de Medicamentos , Masculino , Ratas , Ticlopidina/administración & dosificaciónRESUMEN
The antiaggregant activity of a new benzimidazole derivative - 2,3,4,5-tetrahydro[1,3]diazepino[1,2-α]benzimidazole (DAB-15) has been investigated in vitro in comparison to reference drugs acetylsalicylic acid (ASA) and ticlid (ticlopidine) on the models of ASA, collagen, and epinephrine induced platelet aggregation in rabbits. It was established that DAB-15 exhibited dose-dependent antiaggregant activity. On the model of ASA-induced platelet aggregation, the effect of ADB-15 exceeded that of ASA and was slightly lower than that of ticlid. On the models of collagen, and epinephrine induced platelet aggregation, DAB-15 was reliably more active than the both reference drugs.