Abstract
A study of 29 healthy newborn Black Pied and Simmental calves established stability of the content in their blood of acyl hydroperoxide and thiobarbituric acid—active compounds averaging during the neonatal stage respectively 1.59 D233/1 ml and 3.33 μmol/l as a result of high activity of the antioxidant potential of plasma. Against a background of a low level of endotheliocytemia in healthy newborn calves, there were stably high values of the indices of antiaggregation activity of the vascular wall with all tested inducers (ADP 1.67, collagen 1.58, thrombin 1.52, ristomycin 1.51, and epinephrine 1.64) and their combinations (ADP + epinephrine 1.40, ADP + collagen 1.32, and epinephrine + collagen 1.45). Endotheliocytes of newborn calves are characterized by stable production of antithrombin III providing the necessary level of anticoagulants of vascular origin in their blood (the index of anticoagulation activity of the vascular wall was 1.31 on average). In this case, secretion of tissue plasminogen activators, revealed upon creating temporary ischemia of the venous wall in calves during the first 10 days of life, had a general tendency to intensify (the index of fibrinolytic activity of the vascular wall increased during the neonatal stage by 8.1%).
Published Version
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