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".
Synthetic growth stimulants are widely used to get high productivity of animals. These preparations can accumulate in the meat and their residual quantities will adversely affect the health of consumers. The purpose of the work was to monitor the content of zeranol, growth stimulant of ruminants in beef which goes to meat processing enterprises of the Western region of Ukraine and to determine the effect of heat treatment on its quantity. It was found out that 29.8% of beef samples taken at meat processing enterprises contained a stimulant for the growth of ruminant zeranol. It was found that during the storage of beef samples frozen at a temperature of -18 °C with different content of zeranol there is a decrease in its number. The most intense process of destruction of zeranol occurred during the first month of storage, during this period of time the amount of zeranol is reduced by an average of 20%, regardless of the initial content. Within two months of storage of frozen beef, the content of zeranol decreases by 28.2 ±0.17%, and at the end of the sixth month its quantity decreases to 33.2 ±0.58%. It was also found that the dynamics of zeranol reducing in beef samples with large quantities (22.5 μg.kg-1) and small (2.3 μg.kg-1) were the same. It was set up that during 30 min of meat cooking there was a decrease in the content of zeranol 24.7 ±0.23% and 32.0 ±0.35% for 60 min, compared to its content in fresh meat. At the same time, when stored in the frozen state and subsequent cooking, the reduction of zeranol content in meat was 39.3 ±0.3%. Therefore, it is proposed to revise and amendments into the regulatory documents of Ukraine regarding the control and supervision of the presence of hormone (zeranol) residues in meat and meat products in order to prevent their sale and consumption by humans.
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