This article presents the results of research on the influence of cadmium loading on the state level of enzymatic and non-enzymatic antioxidant links of the antioxidant defense system of the organisms of young cattle, such as the activity of catalase, superoxide dismutase, glutathione peroxidase, glutathione levels, selenium, vitamins A and E. It was found that feeding bull calves with cadmium chloride at doses of 0.03 and 0.05 mg/kg of body weight helped to reduce both the enzymatic and non-enzymatic link of antioxidant protection (superoxide dismutase 31%, catalase 13%, glutathione peroxidase 23%, reduced glutathione 10%, vitamin A 28%, vitamin E 31%, selenium 20%). Toxic effects of cadmium promotes change in steady-state concentrations of radical metabolites О2–,ОН˙, НО2˙, which, in turn, trigger the process of lipid peroxidation. The lowest level of indicators of antioxidant defense system in the blood of young cattle was registered on the sixteenth and twenty-fourth days of the experiment, which is associated with increased activation of lipid peroxidation and the disturbaance of the balance between the antioxidant system and lipid peroxidation intensity. The activity of the antioxidant defense system in the blood was different for calves fed with cadmium chloride at doses of 0.03 and 0.05 mg/kg of animal mass. The more cadmium chloride in the feed, the lower the activity of the antioxidant defense system of the calves’ organisms was registered. Thus cadmium chloride depresses the antioxidant defense system, which specifically involves lowering the activity of enzymatic links (catalase, superoxide dismutase, glutathione peroxidase) and non-enzymatic links (reduced glutathione, selenium, vitamins A and E).
The results of study of toxicity of the newly created «Injectable Mevesel» during acute and chronic experiments are presented. There were no lethal cases at intragastric and intramuscular injections, only short-time inhibition of laboratory animals receiving the drug at a dose of 10.0 ml was observed. There were no lethal cases of test animals during the experiment in the conditions of study of accumulation properties of «Injectable Mevesel». Total average dose of the drug administered made up 162500 mg/kg, and accumulation coefficient was respectively 5.3. In the study of morphological blood parameters of rats after intramuscular injection of «Injectable Mevesel» in increasing doses, probable increase in neutrophils count by 36.1%, and probable reduction in lymphocytes count by 15.2% were found. Administration of the drug in increasing doses significantly affects the functional state of internal organs of experimental animals (liver) and causes significant degradation of the membranes of hepatocytes, as evidenced by increased activity of intracellular ALT, AST enzymes and alkaline phosphatase. Therefore, new domestic drug «Injectable Mevesel» created by us belongs to class 4 toxicity criteria, i.e. low-toxic substances. Наведено результати дослідження токсичності новоствореного препарату «Мевесел-ін'єкційний» у го-строму і хронічному досліді. За умов внутрішньошлункового і внутрішньо м´язового введення загибелі білих щурів не було, лише встановлено короткочасне пригнічення лабораторних тварин, яким задавали препарат у дозі 10,0 мл. За умов дослідження властивостей мевеселу-ін'єкційного в дозах щодо кумуляції загибелі до-слідних тварин протягом досліду не виявлено. Сумарно введена середня доза препарату становила 162500 мг/ кг, а коефіцієнт кумуляції був відповідно -5,3. При дослідженні морфологічних показників крові щурів після внутрішньо м´язового введення препарату "Мевесел-ін'єкційний" у зростаючих дозах, встановлено вірогідне збільшення кількості нейтрофілів на 36,1 % та вірогідне зменшення кількості лімфоцитів на 15,2 %. Введення препарату у зростаючих дозах суттєво впливає на функціональний стан внутрішніх органів дослідних тва-рин (печінки) та викликає деструкцію мембран гепатоцитів, про що вказує підвищення активності внутріш-ньоклітинних ензимів АлАТ, АсАТ і лужної фосфатази. Отже, створений нами новий вітчизняний препарат "Мевесел-ін'єкційний" належить до 4-го класу токсичності, тобто до малотоксичних речовин.Ключові слова : фармакологія, токсикологія, кров, щурі, миші, препарат "Мевесел-ін'єкційний".
In the article are considered issues related to the study of the effect of cadmium on the body of birds, in particular laying hens. The effect of cadmium sulfate at doses of 2.0 and 4.0 mg/kg body weight on protein synthesis function and functional state of the liver were investigated of cross-laying Hysex white hens, of 78 weeks old. Three groups of chickens were formed: two experimental and one control groups. The laying hens of the experimental groups were subjected to a cadmium load. Laying chickens of the first experimental group were given cadmium sulfate at a dose of 2.0 mg/kg body weight. Laying chickens of the second experimental group were given cadmium sulfate at a dose of 4.0 mg/kg body weight. Laying chickens in the control group were in the normal diet without cadmium. Increased activity of aminotransferases, in particular alanine and aspartate aminotransferases in their serum of hens, was observed during cadmium binge drinking in doses of 2.0 and 4.0 mg/kg body weight, respectively. These changes indicate a violation of the functional state of the liver of laying hens under conditions of cadmium load. In the study of protein synthesis of the liver of laying hens under conditions of cadmium loading, it was found that cadmium sulfate in the above doses contributed to a significant decrease in the level of total protein by 14, 21 and 30 days of the experiment. The reduction of total protein in the blood of laying hens was due to a decrease in the level of albumin, which in the second experimental group, respectively, decreased to 28.16 ± 0.75%, whereas in the first – 29.62 ± 0.98%. In the study of the level of globulins, it is possible to increase this indicator in both experimental groups of poultry for 21 days. Drinking with water cadmium sulfate at a dose of 4.0 mg/kg body weight was associated with a more likely decrease in total protein and albumin than drinking cadmium sulfate at a lower dose.
The article deals the results of searches on the prevalence, etiological factors and pathogenic mechanisms of certain dental diseases in cats. The analysis of literary data of domestic and foreign scientists testifies, that among dental diseases in cats the largest group consists of periodontal diseases. The changed type of feeding, the imbalance of the ration, the lack of complete self-cleaning of the teeth lead to a decrease in the immunobiological reactivity of the organism. Incorrect bite, deformation of the teeth, parodontopathy, etc. cause an animal's discomfort, cause complications in the cardiovascular, respiratory and other systems. Periodontopathies are registered, for the most part, in adult cats. The etiological factors of periodontal diseases are local and general. The starting mechanism of the inflammatory process in the peritoneal tissues is a violation of the ratio of various associations of microorganisms, the balance of which depends on the presence of dental plaque and dental stone. The results of research of many scientists testify that periodontal diseases are accompanied by complicated and profound disorders at the morphological level, as well as systemic changes in metabolic, biochemical, immunological and endocrine reactions. In the absence of prevention, untimely diagnosis of periodontal disease and the treatment of dental sick cats irreversible changes in the dental system of animals are developed. Diseases of the oral cavity in cats is one of the main causes of loss of teeth, the emergence of deformations, the formation of chronic foci beyond the oral cavity and the development of various forms of somatic pathology. Therefore, to prevent the development of periodontal disease and their complications in cats it is necessary to develop effective measures for the prevention of diseases of the parolont, and for stomatologically sick animals - methods of treatment with the use of new medicinal substances.
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