[Influence of intravenous injection of fucoidan from brown seaweed Fucus evanescens by plasma rabbits anticoagulant activity and neutralisation by sulphate protamin of fucoidans antithrombin activity in vitro]

With fucoidan from Fucus evanescens dose increase from 1 to 5 mg/kg plasma coagulation time in test A(see symbol)TB increases. Sulphate protamin in final concentration 0.67-1.35 mkg/ml will neutralise antithrombin activity of fucoidans from brown seaweed Fucus evanescens and Laminaria cichorioides. The gravimetrichesky relation for the investigated samples makes an antidot/anticoagulant 1.

[Etiopathogenic and clinical considerations on primary pulmonary hypertension]

Primary pulmonary hypertension is a severe condition of unknown etiology first described by Romberg in 1891. The authors review the literature with particular emphasis on new hypotheses concerning etiopathogenesis, and recent suggestions for management. The former take into account the discovery of endothelium derived relaxing factors and the identification in pulmonary arteries of a polypeptide called endothelin. Further hypotheses contemplate 1) interaction between platelets and endothelium; 2) the role of heparin-inhibiting enzymes; 3) abnormal cellular adhesion. Heart catheterism is apt to exclude other causes of pulmonary hypertension and also permits to assess the severity of the condition and its prognosis, as well as acting as a guide to management. If venous O2 saturation is higher than 63%, calcium blocking agents and anticoagulants should be used, if it is lower than 63% long-term prostaglandin infusion should be given awaiting heart-lung transplantation unless this can be done immediately.

[Heparin and its antagonist--a quaternary ammonium salt of oligomer-25-conidine: distribution in subcellular organelles, effect on DNA synthesis in the regenerating rat liver]

Dynamics of distribution in subcellular organelles as well as effects on DNA synthesis of heparin, polycanidine (ChAS oligomer of 25 canidine) and their complexes were studied in regenerating rat liver tissue after partial hepatectomy. Polycanidine and heparin penetrated from circulation into hepatocyte cells, nuclei and mitochondria. After consecutive administration of polyelectrolytes polycanidine increased 2-2.5-fold the amount of heparin entering into cells. Polycanidine formed stable complexes with DNP in nuclei. Heparin and its complexes with polycanidine decreased the DNA synthesis within first day. Heparin appears to be responsible for the inhibitory effect, whereas administration of polycanidine only into animals caused a slight increase in 3H-thymidine incorporation into DNA as compared with controls.