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Материалы V съезда фармакологов России «Научные основы поиска и создания новых лекарств» (14-18 мая 2018 года, г. Ярославль)

The effects of intraperitoneal administration of SNK-411 (2-isobutyl-4,6-dimethyl-5-hydroxypyrimidine) in a dose of 25 mg/kg (the total dose of 350 mg/kg) and SNK-578 (hydrochloride of 2-isobutyl-4,6-dimethyl-5- hydroxypyrimidine) in a dose of 10 mg/kg (the total dose of 140 mg/kg) on tumor growth and concentration of cytokines in the blood serum were studied in female CBA mice. Substances were administrated from the 2nd to 15th days of tumor development. Tumor growth inhibition (TGI) and serum cytokine level were studied on the 7th day after the end of compounds administration (21st day of tumor growth). In intact control group (n=10) median tumor mass was 1255 mg. TGI in the group of animals treated with SNK-411 was 47%; in the group of mice treated with SNK-578 TGI was 87%, tumor mass demonstrated 7.4-fold reduction. Serum concentrations of cytokines (IL-6, IL-10, IL-17A and IFN-γ) in tumor-bearing group of mice were higher versus the intact control group by 229%, 40%, 60% and 81%, respectively. Highly active SNK-578 decreased concentrations of prooncogenic IL-10, IL-17A and proinflammatory IL-6, by 61%, 70% and 29% as compared to tumor-bearing control group. SNK-411 decreased concentrations of prooncogenic IL-10 and IL-17A by 48% and 60%, respectively, and did not affect concentration of IL-6. Taking into consideration that IL-6 participates in autoimmune reactions, we can assume that the immune control is one of the crucial mechanisms of antitumor effect of SNK-578. All results are statistically significant.

The research of immunotoxicity of extended-release form of Afobazol was conducted on male CBA, C57BL/6 and F1 hybrids (CBA×C57BL/6) mice. Afobazol was administered per os for 14 days in doses of 12 mg/kg and 120 mg/kg. Control group received a placebo. Weight of thymus, spleen and popliteal lymph nodes was not affected by the extended-release form of Afobazol in doses of 12 mg/kg and 120 mg/kg in F1 hybrids (CBA×C57BL/6) mice compared to the control group (p> 0.05). Cellularity of thymus was significantly increased by the extended-release form of Afobazol in dose of 12 mg/kg (p< 0.01 vs control group). Administration of the extended-release form of Afobazol in doses of 12 mg/kg and 120 mg/kg decreased spontaneous chemiluminescence activity of peripheral blood lymphocytes in 2.0 and 2.2 times, in dose of 120 mg/kg level integral chemiluminescence response S was decreased in 2.4 times (p< 0.05 vs control group). Phagocytic activity of peritoneal macrophages and antibody production in F1 hybrids (CBA×C57BL/6) mice were not affected by administration of the extended-release form of Afobazol in doses of 12 mg/kg and 120 mg/kg (p > 0.05 vs control group). 14 days of the extended-release form of Afobazol in doses of 12 mg/kg and 120 mg/kg did not cause any significant change to intensity of delayed-type hypersensitivity reactions (p> 0.05 vs control group). The results of the study allow us to conclude that administration of the extended-release form Afobazol in the range of studied doses does not induce immunotoxicity.

Аннотация. Проведено исследование аллергизирующих свойств и иммунотоксического действия готовой лекарственной формы препарата ГСБ-106. Исследование аллергизирующих свойств и иммунотоксического действия ГСБ-106 выполнено на самцах морских свинок альбиносов массой 250-300 г и на самцах мышей линий СВА, C57BL/6, гибридах F1(CBAхС57BL/6). При оценке иммунотоксичности ГСБ-106 вводили мышам перорально 14 дней в дозах 2,2 мг/кг и 22 мг/кг, при изучении аллергенности ГСБ-106 морским свинкам альбиносам вводили препарат в дозах 1 мг/кг и 10 мг/кг, согласно стандартным схемам иммунизации. Результаты проведённого исследования иммунотоксичности и аллергенности ГСБ-106 позволяют заключить, что введение готовой лекарственной формы препарата ГСБ-106 в диапазоне изученных доз не оказывает иммунотоксического действия и не обладает аллергизирующими свойствами. Ключевые слова: готовая лекарственная форма ГСБ-106; фагоцитоз; хемилюминесценция; гуморальный иммунный ответ; клеточный иммунный ответ; иммунотоксичность; реакция системной анафилаксии; гиперчувствительность замедленного типа; реакция воспаления на Кон А