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The Role of Disorders of Metabolism of Nitric Oxide for Pathogenesis of Experimental Bronchial Asthma

Journal: Ukrainian journal of medicine, biology and sport (Vol.2, No. 2)

Publication Date:

Authors : ;

Page : 26-30

Keywords : bronchial asthma; nitric oxide; lymphocytes; arginase; NO-synthases;

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The aim is to study the activity of nitric oxide synthase (endotelial and inducible), arginase activity of peripheral blood lymphocytes of Guinea pigs with experimental asthma. Materials and methods. All experiments on laboratory animals carried out with following the European Convention for the protection of vertebrate animals used for experimental and other scientific purposes (Strasbourg, 1986), Council Directive 2010/63 / EU, the Law of Ukraine 3447- IV “protection animals from the cruelty” the general ethics of animal experimentation adopted by the first national Congress on bioethics in Ukraine (2001). The researches were carried out on 72 Guinea-pigs (category: Cavia porcellus, males). The weight of each one was 180-220g. They were divided into 5 groups for 15 animals in each of them. Among the first group (control) there were intact Guinea-pigs. Among the second group there were animals with an experimental BA (on 5th day of experiment). Among the third group there were Guinea-pigs on the 19th day of the experiment. The fourth group consisted of animals with an experimental BA (on 26th day of the experiment) and the fifth group included Guinea-pigs with an experimental BA (33rd day). Two periods of experimental asthma were separated in order to make detailed analysis and interpretation of indicators of endogenous intoxication in different days of the experiment: early period and late one. The early period included a group of animals with BA on the 5th and 19th days of the experiment. Late period included Guinea pigs on 26th and 33rd day of asthma. The experimental asthma model reproduced in Guinea pigs by Babich method (1979). Animals were sensitized by a normal horse serum (0.1 ml intraperitoneally). Next three days they were entered subcutaneously 0.1 ml of normal horse serum (NKS) with a setting in an autoclave BCG (1 mg BCG 1.0 ml NKS). The next 14 days the animals were exposed to inhalation (using a spray) NKS to 1.0 ml of serum for each Guinea pig daily for 30 minutes in a sealed chamber. After this period every 7 days, Guinea pigs had these NKS inhalation. Then the animals were decapitated under the influence of ether anesthesia. In all groups of Guinea pigs there were determined NO synthase activity by specific cleavage NADPH (H +), arginase lymphocyte activity by the formation of urea. Numerical results were adapted with static method using Student's criteria. Results of the research. The dynamics of formation of asthma found that arginase activity of blood lymphocytes increases almost linearly at an early period and reaches a maximum term experiment at the latest. Since the 5-day study of BA formation rate increased by 8.8% (r≤0,05) and after 19 days the activity of arginase is much progress relative to the control group (an increase of 46.8% (r≤0, 05)). In the later period of asthma continues increasing arginase activity, namely 65% (r≤0,05) and 87.8% (r≤0,05) respectively 26th and 33rd day modeling process when compared with intact animals. To assess the activity of endotelial NO-synthase (eNOS) it was recorded its reduction in the dynamics of the formation of experimental asthma.

Last modified: 2017-11-04 17:45:45