[The action of the alkanol ammonium salts of aroxyacetic acids on the thrombocyte aggregation process].

Tris(2-hydroxyethyl)ammoniates of ezo-substituted aroxyalkane-carboxylic acids were examined for their effects on in vitro platelet aggregation under the influence of biogenic amines, as well as in lipid peroxidation. Hemocoagulation was evaluated in vivo. The agents tested were demonstrated no be a promising class of platelet aggregation inhibitors.

[Effect of aggregation inhibitors on thrombocyte enzymatic activity].

Experiments on rabbits proved that amidopyrin, sulphatizonicotinoilamine-guanidine, chlorpromazine, triphthazine, euphylline and tedamine inhibit aggregation of thrombocytes and unidirectionally have an effect on the carbohydrate metabolism enzymes in these cells, both in vitro and in vivo following their single and coursewise introduction. They also activate the lactate- and glyceraldehide-3-phosphate-dehydrogenase and reduce the activity of glucose-6-phosphate-dehydrogenase.

[Action of some pyrazolone derivatives on thrombocyte aggregation].

The influence of four agents--pyrazolidinedione derivatives on the ADP-induced aggregation and activity of glycolytic enzymes--glyceraldehydrophosphate dehydrogenase and lactate dehydrogenase (GAPD, LDG) and of the anatomic oxidation enzyme--glucose-6-phosphate dehydrogenase (G-6-PD) was studied. The substances known by a conventional designation of MYaK-38, No-13 and No-2 are shown to display an antiaggregational action. Amidopyrine was found to depress the adhesive capacity of blood platelets, to activate GAPD and LDG and to lower the activity of G-6-PD.