The in vitro effects of a-tocopherol and melatonin on the intensity of DNA internucleosomal fragmentation in tissue and neoplastic tissue of patients with thyroid pathology was studied. alpha-Tocopherol at a concentration of 10(-7) M and melatonin at a concentration of 10(-3) M were shown to inhibit internucleosomal DNA fragmentation in unchanged thyroid tissue, while in pathologically changed tissue and neoplastic tissue the effect of antioxidants was either absent, or those effects of preparations were prevailing, which were aimed at an increase in the intensity of internucleosomal DNA fragmentation. Some peculiarities of changes in the content of certain oligonucleosome fractions depending on the preparation, its dose, and thyroid disorder have been identified.
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January 1996
The effect of various doses of intraperitoneally administered adenosine on the content of corticotropin and corticosteroids on the blood plasma was studied in Wistar rats. Dependence of the effect exerted by adenosine on the hypothalamo-pituitary-adrenal system on its dose was demonstrated: 1 hour after nucleoside administration in a dose of 50 mg/kg corticotropin concentration increased; 1 hour after adenosine administration in a dose of 25 mg/kg the level of corticosteroids in the blood plasma decreased.
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