The effect of a single injection of doxorubicin, 8-day administration of two 5-hydroxypyrimidine derivatives, SNK-411 (2-Isobutyl-4,6-dimethyl-5-hydroxypyrimidine) and SNK-578 (hydrochloride of 2-isobutyl-4,6-dimethyl-5-hydroxypyrimidine), on metastases, lifespan and serum cytokines has been investigated in С57ВL/6 mice after removal of a primary tumor node of Lewis lung carcinoma (LLC). LLC cells (1×106) were injected in the footpad of right hind feet of mice in control and experimental groups; after 14 days of tumor development the hind feet with the tumor were amputated at the ankle level. One hour before the amputation mice received a single injection of doxorubicin (4 mg/kg) and 8-day therapy with the 5-hydroxypyrimidine derivatives started. SNK-578 monotherapy was performed at a dose of 10 mg/kg administered intraperitoneally (i.p.). SNK-411 was administered per os at a dose of 25 mg/kg. In the case of combined therapy mice also received a single injection of doxorubicin (4 mg/kg; i.p.). The metastasis inhibition index in mice-treated with SNK-411 and SNK-578 were 53.3% as compared with control mice (with removed tumor). The mice-treated with SNK-411, doxorubicin, and the combination SNK-578 + doxorubicin had lifespan increased by 60.2%, 53.9%, and 42.9%, respectively. A single injection of doxorubicin, the course administration of the 5-hydroxypyrimidine derivative alone and in combination with single injection of doxorubicin completely decreased serum levels of the prooncogenic Th2-cytokines IL-4, and IL-6 and significantly decreased the level of the Th2-cytokine IL-5. Administration of doxorubicin, SNK-411 and SNK-578 did not influence serum concentration of Th1-cytokine interferon gamma (IFN-γ). These data confirm our previous findings that administration of the compounds studied decreased concentrations of prooncogenic IL-4 and IL-6 in tumor-bearing mice with LLC and had no effect on concentrations of the Th1-cytokine IFN-γ.

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.

Производные 5-оксипиримидина СНК-411 и СНК-578 (10 – 50 мг/кг внутрибрюшинно, однократно, мыши) обладают выраженной противовоспалительной активностью, сопоставимой с диклофенаком. На модели анафилаксии к овальбумину у морских свинок-альбиносов выявлена противоаллергенная активность этих соединений. СНК-411 при внутрисердечном введении 50 мг/кг (после формирования модели) в 1,8 раза уменьшает индекс по Weigle анафилактической реакции у морских свинок на овальбумин. СНК-578 в дозах 25 и 50 мг/кг снижает индекс анафилактической реакции в 2,8 и в 10 раз, соответственно (p < 0,05).

Homeovox, a multicomponent homeopathic treatment for laryngitis of various etiologies, was tested for allergenic properties and immunotoxicity. Methods . 80 male albino guinea pigs and 180 male СВА, C57BL/6 and F1 hybrid (CBAхС57BL/6) mice were used in the study. In order to assess immunotoxicity, Homeovox was administrated orally to mice for 14 days at doses of 100 mg/kg and 1 000 mg/kg. To assess the allergenic properties of Homeovox, albino guinea pigs were also given the drug at doses of 100 mg/kg and 1 000 mg/kg according to the standard immunization schedules. Results . Oral administration of Homeovox to mice for 14 days at doses of 100 mg/kg and 1 000 mg/kg did not cause significant changes in the main characteristics of immune response compared to controls. When assessing allergenicity, Homeovox at doses 100 mg/kg and 1 000 mg/kg administered according to the standard immunization schedules did not induce systemic anaphylaxis or active skin anaphylaxis in albino guinea pigs. The immunization of guinea pigs by Homeovox at the same doses in a mixture with Freund's complete adjuvant caused no delayed allergic reactions. Homeovox at a single oral dose of 1 000 mg/kg significantly decreased concanavalin A-induced inflammation in CBA mice by 58.4 %. Conclusion . Within the dosage range investigated, Homeovox does not induce immunotoxicity, immediate- or delayed-type allergic or pseudoallergic reactions.

The effects of 5-hydroxypyrimidine derivatives SNK-411 (2-isobutyl-4,6-dimethyl-5-hydroxypyrimidine) and SNK-578 (2-isobutyl-4,6-dimethyl-5-hydroxypyrimidine chlorohydrate) on the tumor growth and survival of male C57BL/6 mice with transplanted Lewis lung epidermoid carcinoma (LLC) were studied in animals receiving intraperitoneal treatment on days 2-15 of tumor development. Compound SNK-578 in a dose of 10 mg/kg significantly inhibited tumor growth (by 3.6 times; 72.2%) in 7 days after the treatment was discontinued, while compound SNK-411 in a dose of 25 mg/kg only negligibly reduced tumor volume (by 41.7%). A combination of course of SNK-411 (25 mg/kg) and single intraperitoneal dose of doxorubicin (4 mg/kg) significantly inhibited the tumor growth (by 2.2 times; 55.2%), while the combination of SNK-578 (10 mg/kg) with doxorubicin (4 mg/kg) was in fact ineffective. The median survival of animals with untreated LLC was 28 days. Median survival of mice injected with SNK-578 (10 mg/kg) was 43 days, hence, the lifespan of mice with LLC was by 38.6% longer after the treatment. Two of ten mice in this group developed no tumors.

Abstract. The study of allergenic properties and immunotoxic effects of the ready-to-use drug form of GSB-106 was carried out. The study of allergenic properties and immunotoxicity of GSB-106 was performed on male albino guinea pigs weighing 250-300 g and on male CBA, C57BL / 6, F1 hybrids (CBAxC57BL / 6) mice. When assessing immunotoxicity, GSB-106 was inject to mice per os for 14 days in doses of 2.2 mg / kg and 22 mg / kg. When studying the allergenicity, GSB-106 was injected to albino guinea pigs in doses of 1 mg / kg and 10 mg / kg according to standard regimens of immunization. The results of the study of the immunotoxicity and allergenicity of GSB-106 allow us to conclude that the injection of the ready-to-use drug form of GSB-106 in the range of studied doses does not have an immunotoxic effect and does not have allergenic properties.

The study of allergenic properties and immunotoxic effects of the ready-to-use drug form of GML-1 (N-benzyl-N-methyl-1-phenylpyrrolo[1,2-a] pyrazin-3-carboxamide), compounds with high TSPO affinity and pronounced anxiolytic activity, was carried out. The study of allergenic properties and immunotoxicity of GML-1 was performed on male albino guinea pigs weighing 250-300 g and on male CBA, C57BL / 6, F1 hybrids (CBAxC57BL/6) mice. When assessing immunotoxicity, GML-1 was inject to mice per os for 14 days in doses of 2.2 mg / kg and 22 mg / kg. When studying the allergenicity, GML-1 was injected to albino guinea pigs in doses of 1 mg / kg and 10 mg / kg according to standard regimens of immunization. The results of the study of the immuno-toxicity and allergenicity of GML-1 allow us to conclude that the injection of tablet dosage form of GML-1 in the range of studied doses does not have an immunotoxic effect and allergenic properties.

Homeovox, a multicomponent homeopathic treatment for laryngitis of various etiologies, was tested for allergenic properties and immunotoxicity.Methods. 80 male albino guinea pigs and 180 male СВА, C57BL/6 and F1 hybrid (CBAхС57BL/6) mice were used in the study. In order to assess immunotoxicity, Homeovox was administrated orally to mice for 14 days at doses of 100 mg/kg and 1 000 mg/kg. To assess the allergenic properties of Homeovox, albino guinea pigs were also given the drug at doses of 100 mg/kg and 1 000 mg/kg according to the standard immunization schedules.Results. Oral administration of Homeovox to mice for 14 days at doses of 100 mg/kg and 1 000 mg/kg did not cause significant changes in the main characteristics of immune response compared to controls. When assessing allergenicity, Homeovox at doses 100 mg/kg and 1 000 mg/kg administered according to the standard immunization schedules did not induce systemic anaphylaxis or active skin anaphylaxis in albino guinea pigs. The immunization of guinea pigs by Homeovox at the same doses in a mixture with Freund's complete adjuvant caused no delayed allergic reactions. Homeovox at a single oral dose of 1 000 mg/kg significantly decreased concanavalin A-induced inflammation in CBA mice by 58.4 %.Conclusion. Within the dosage range investigated, Homeovox does not induce immunotoxicity, immediate- or delayed-type allergic or pseudoallergic reactions.

У мышей линии C57BL/6 c перевиваемой эпидермоидной карциномой легкого Lewis (LLC) 2-изобутил-4,6-диметил-5-оксипиримидин (СНК-411) после введения в дозе 50 мг/кг (внутрибрюшинно ежедневно с 2 по 15 дни роста опухоли LLC) уменьшает ее объем на 9 сут (ТРО 37,8 %) и 16 сут (ТРО 39,6 %) развития (p < 0,01). Препараты, используемые для верификации модели: доксорубицин (4 мг/кг, внутрибрюшинно на 2 и 4 дни развития LLC) подавляет рост опухоли на всех сроках развития (9, 16 и 21 сут), фторафур (30 мг/кг, внутрибрюшинно с 2 по 15 дни развития LLC) значимого влияния на объем LLC не оказывает. При оценке метастазирования опухоли в легких на 21 сут после инокуляции LLC установлено, что индекс ингибирования метастазирования после введения СНК-411 равен 61,4 %, фторафура — 48,8 %, доксорубицина — 40,1 %. При исследовании гистологических срезов легких зафиксировано максимальное уменьшение площади метастазов по отношению к площади ткани легких у мышей на фоне применения доксорубицина (на 87,2 %, p < 0,05), затем — на фоне СНК-411 (на 73,4 %, p < 0,05).

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

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

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