Сoagulation hemostasis in experimental light desynchronosis

2021 ◽  
Author(s):  
В.Ф. Киричук ◽  
А.Н. Иванов ◽  
О.В. Злобина ◽  
И.О. Бугаева ◽  
А.Ю. Каретникова ◽  
...  
Keyword(s):  
Control Group ◽  
Coagulation Activity ◽  
Experimental Animals ◽  
Artificial Lighting ◽  
Thrombin Generation Assay ◽  
White Rats ◽  
Activity Assessment ◽  
Coagulation Mechanism ◽  
System Assessment ◽  
Antithrombin Iii Activity

Введение. Патологическое повышение активности свертывающей системы вызывает нарушение реологических свойствкрови, является фактором риска развития тромбоза крупных сосудов и возникновения ишемической болезни сердца, инфаркта миокарда, тромбофилии и ДВС-синдрома. Цель исследования: изучение влияния светового десинхроноза на функциональную активность коагуляционного механизма гемостаза в эксперименте. Материалы и методы. Экспериментальное исследование было выполнено на 36 нелинейных самцах белых крыс, разделенных на 3 группы: контрольную группу, не подвергавшуюся воздействию светового десинхроноза, и 2 опытных, находившихся в условиях искусственного освещения на протяжении 10 и 21 суток, соответственно. Состояние коагуляционного звена системы гемостаза оценивали по следующим показателям: активированное частичное тромбопластиновое время, протромбиновое время и концентрация фибриногена. Антикоагулянтную активность крови оценивали путем определения активности в плазме крови антитромбина III. Состояние фибринолитической системы оценивали по концентрации в плазме растворимых фибрин-мономерных комплексов и D-димеров. Для динамической оценки активности тромбина применяли тест генерации тромбина. Результаты. Установлено негативное влияние светового десинхроноза на состояние гемостаза. На 10-е сутки эксперимента выявлено компенсаторное повышение активности противосвертывающей и фибринолитической систем. Нахождение подопытных животных в условиях длительной световой депривации на протяжении 21 суток способствовало развитию стресса и сдвигу системы гемостаза в сторону гиперкоагуляции. Заключение. Результаты проведенного экспериментального исследования позволяют сделать вывод о возникновении стресс-реакции у подопытных животных под воздействием светового десинхроноза, а также о гиперкоагуляционных нарушениях равновесия в системе гемостаза, что создает предпосылки для формирования тромбинемии. Background. A pathological increasing of coagulation activity causes disorders of blood rheological properties, that is a risk factor for large vessels thrombosis and coronary heart disease, myocardial infarction, thrombophilia and disseminated intravascular coagulation. Objectives: to study the effect of light desynchronosis on the functional activity of hemostasis coagulation mechanism in experiment. Materials/Methods. The experimental study was carried out on 36 nonlinear male white rats, divided into 3 groups: a control group that was not exposed to light desynchronosis, and 2 experimental groups under artificial lighting for 10 and 21 days, respectively. Coagulation hemostasis was assessed by following parameters: activated partial thromboplastin time, prothrombin time, and fibrinogen content. Anticoagulant blood activity was assessed by antithrombin III activity. Plasma levels of soluble fibrin-monomeric complexes and D-dimers were used for fibrinolytic system assessment. The thrombin generation assay was used for thrombin activity assessment. Results. Light desynchronosis negatively impact hemostasis. On the 10th day of the experiment we revealed a compensatory increasing of anticoagulant and fibrinolytic activities. Exposure of experimental animals to prolonged light deprivation for 21 days caused stress development and hemostasis shift towards hypercoagulation. Conclusions. Light desynchronosis leads to stress reaction in experimental animals as well as to hypercoagulable hemostasis disorders that creates the preconditions for thrombinemia.

scholarly journals 2. The Effect Of Sipatah-patah (Cissus quadrangularis Salisb) Extract On The Femur Bone Density of White Rat (Rattus norvegicus) with Model Ovariectomy

2019 ◽  
Vol 13 (1) ◽  
pp. 5-14
Author(s):  
Mustafa Sabri ◽  
Debby Novita Ayumi ◽  
Muhammad Jalaluddin ◽  
Hamny Hamny ◽  
Cut Dahlia Iskandar ◽  
...  
Keyword(s):  
Rattus Norvegicus ◽  
Bone Growth ◽  
The Other ◽  
Trabecular Structure ◽  
Ovariectomized Rats ◽  
Control Group ◽  
Experimental Animals ◽  
Femur Bone ◽  
White Rats ◽  
Cissus Quadrangularis

This research aimed to determine the effect of giving Sipatah-patah extract toward the histopathological and femur bone growth of white rat that was ovariectomized. The experimental animals that were used were 12 white rats divided into 4 treatment group with 3 repetitions. K0 was the ovariectomized rat without giving Sipatah-patah extract (ESP); K1, K2 and K3 were ovariectomized rats which were given Sipatah-patah extract with multilevel doses of 500 mg/kg BW, 700 mg/kg BW and 900 mg/kg BW for 30 days. On the 31st day, rats were euthanized using chloroform and os femur that was taken to being made into histological preparation.  There was the decrease in the bones density of the K0 group which is characterized by thinning of trabecular structure, there were lots of osteoclast cells on the edge of the trabecular and lower density of active osteoblasts and passive osteoblasts. The rat of group K1 and K2 showed an improvement on the trabecular structure and lower osteoclast than group K0. The rat of group K3 had a visible improvement of the most congested trabecular structures, cohesive with the most density cell of active osteoblasts than the other groups. The result of this research concluded that the giving of Sipatah-patah extract doses 900 mg/kg BW showed a higher density of trabecular and active osteoblasts than the control group, K1 and K2 on the white rat bones that were ovariectomized.

scholarly journals EFFECT OF LONG-TERM FEEDING WITH HOMOGENIZED FOOD ON CYTOMETRIC LIVER PARAMETERS OF WHITE RATS IN ONTOGENESIS

2020 ◽  
pp. 142-152
Author(s):  
T.I. Kuznetsova
Keyword(s):  
Growth Rate ◽  
Cross Sectional Area ◽  
Postnatal Ontogenesis ◽  
Control Group ◽  
Natural Food ◽  
Sectional Area ◽  
Cross Sectional ◽  
Experimental Animals ◽  
White Rats

The aim of the paper is to study the effect of long-term feeding with finely ground food on the dynamics of cytometric hepatocyte parameters in white rats in postnatal ontogenesis. Materials and Methods. On the 21st day of postnatal ontogenesis, 100 male white rats were divided into a control group and two experimental groups (experiment 1 and experiment 2). The animals of the control group were fed with natural food, while the animals of the experimental groups similar food (in terms of quality and quantity), but after careful mechanical grinding. To assess the reversibility of the homogenized food feeding, animals of experimental group 2 were fed natural food, as the control animals (days 120–240). The authors studied the liver, using cell morphometry of standard histological staining. They measured cross-sectional area of the nuclei and hepatocyte cytoplasm, calculated nuclear-cytoplasmic ratio, and counted the number of hepatocytes on the standard cross-sectional area, including binuclear hepatocytes. Results. It was revealed that long-term consumption of homogenized food affects the postnatal morphogenesis of the liver parenchyma. From the 21st to the 120th day, the growth rate of hepatocytes and the number of binuclear cells in the experimental animals exceeded those of the control animals, and from the 120th up to the 240th day, the growth rate of hepatocytes in the experimental animals was significantly inferior to that of the control animals. As a result, the number of cells per standard cutting area increased. In case of transition to normal food with natural mechanical properties (120th–240th days of postnatal ontogenesis) there was a tendency to the restoration of cytometric hepatocyte parameters. However, the authors did not observe complete recovery. Keywords: liver, hepatocyte, homogenized food. Цель работы – изучить влияние длительного питания мелко измельченной пищей на динамику цитометрических параметров гепатоцитов белых крыс в постнатальном онтогенезе. Материалы и методы. На 21-е сут постнатального онтогенеза 100 самцов белых крыс были разделены на контрольную и две опытные группы (опыт I и опыт II). Животных контрольной группы содержали на естественном для грызунов корме, а животные опытных групп получали аналогичную по качественному и количественному составу пищу, но после тщательного механического измельчения. Для оценки обратимости воздействия питания диспергированной пищей животных II опытной группы со 120-х по 240-е сут переводили на питание кормом контрольных животных. Исследовали участки печени, морфометрию клеток которой проводили на стандартно окрашенных гистологических срезах. Измеряли площадь сечения ядер и цитоплазмы гепатоцитов, вычисляли ядерно-цитоплазматическое отношение, на стандартной площади среза подсчитывали количество гепатоцитов, в т.ч. двуядерных. Результаты. Выявлено, что длительное потребление диспергированной пищи оказывает воздействие на постнатальный морфогенез паренхимы печени. С 21-х по 120-е сут интенсивность роста гепатоцитов и количество двуядерных клеток опытных животных превышает таковые значения контрольных, а с 120-х по 240-е сут интенсивность роста гепатоцитов опытных животных существенно уступает показателям контрольных животных, вследствие чего количество клеток на стандартную площадь среза увеличивается. При переходе к питанию пищей с естественными механическими свойствами со 120-х по 240-е сут постнатального онтогенеза наблюдается тенденция к восстановлению цитометрических параметров гепатоцитов, однако полного восстановления не происходит. Ключевые слова: печень, гепатоцит, диспергированная пища.

scholarly journals Anti-receptor Advanced Glycation End Products Decreases Inflammatory Pathways in Retinopathy Diabetics: In vivo Study

2020 ◽  
Vol 8 (A) ◽  
pp. 414-417
Author(s):  
Ramzi Amin ◽  
A. K. Ansyori ◽  
Riani Erna ◽  
Lilianty Fauzi
Keyword(s):  
Diabetic Retinopathy ◽  
Negative Control ◽  
Control Group ◽  
Advanced Glycation ◽  
Experimental Animals ◽  
Retinal Tissue ◽  
White Rats ◽  
Glycation End Products ◽  
End Products

BACKGROUND: Diabetic retinopathy is an emerging microvascular complication of diabetes mellitus and a causes of blindness in individuals between ages 30 and 70 years, which is characterized by increased proliferation of blood vessels, vascular occlusion, angiogenesis, loss of pericytes from retinal capillaries, microaneurysms, retinal bleeding, increased retinal capillary permeability, thickening of capillary basal membranes, and infarcts that affect the retina, induced to permanent blindness. AIM: This study aimed to find the role of receptor advanced glycation end products (RAGE) inhibition in lowering the vascularization process which causes a decrease in retinal function on diabetic retinopathy. MATERIALS AND METHODS: This research was an in vivo experimental study. A total of 30 male Wistar rats (200 ± 20 g) were obtained from Eureka Research Laboratory (Palembang, Indonesia). Experimental animals were placed in cages under controlled conditions (12 h of light/dark cycles with temperatures of 22 ± 1°C and humidity of 40–60%), fed and drank ad libitum. White rats were induced by diabetes mellitus using alloxan at a dose of 120 mg/kgBW, intraperitoneally, accompanied by drinking 10% glucose solution for 140 days. Furthermore, experimental animals were grouped into five groups (at eight animals per group), Group 1: Normal control, Group 2: Negative control (induced diabetics retinopathy and given intravenous aquadest), Group 3: Given anti-RAGE 1 ng/mL, Group 4: Given anti-RAGE 10 ng/mL, and Group 5: Given anti-RAGE 100 ng/mL. Giving anti-RAGE was done in a single dosage and intravitreal. After the rats were sacrificed by intraperitoneal injection of 10% chloral hydrate, the evacuation of the eye’s retinal tissue was then carried out, fixed in a 4% paraformaldehyde buffer for immunohistochemistry examination of the eye’s retinal tissue. Evaluation of the expression of nuclear factor-κβ (NF-kB) and intercellular adhesion molecule-1 (ICAM-1) used Image J Software so that the percentage of NF-kB and ICAM-1 expression would be obtained. RESULTS: Negative control group showed an increase in NF-kB expression in the retinal tissue of diabetic retinopathy rats. Administration of anti-RAGE showed its potential to suppress NF-kB expression in retinal tissue of diabetic retinopathy white rats as well with an increase of anti-RAGE dose from 1 ng/mL to 100 ng/mL. Activation of NF-kB causes activation of the inflammatory cascade, which is characterized by the production of pro-inflammatory cytokines, one of which is ICAM-1. Giving anti-RAGE could suppress the expression of ICAM-1 along with an increase in anti-RAGE dose. CONCLUSION: Anti-RAGE is able to block the inflammatory process, by inhibiting the expression of NF-kB and ICAM-1 in the retinal tissue of diabetics retinopathy in white rats.

TOXICOLOGICAL PROFILE OF “BIOSOLBI” DRUG

1970 ◽  
pp. 67-69
Author(s):  
E. K. Rakhmatullin ◽  
O. D. Sklyarov
Keyword(s):  
Drug Toxicity ◽  
Probit Analysis ◽  
Laboratory Animals ◽  
Control Group ◽  
Hazard Class ◽  
Water Ingestion ◽  
White Rats ◽  
Poorly Soluble ◽  
And Behavior ◽  
Purebred Dogs

The article presents the results of a study of the "Bisolbi" drug toxicity (powder of light ash color, poorly soluble in water). When it is mixed with water it forms a suspension of particles that settle rapidly. Values of acute drug toxicity were determined on rats. We studied groups of six animals of the same sex, as well as similar control ones. The "Bisolbi" drug was injected to white rats intragastrically, males weighing 310 ... 320 g in doses of 2500 and 2740 mg / kg. Each dose was used in six animals; distilled water (3 ml) was used for the controls. The LD50 was calculated by the probit analysis method proposed by Litchfield and Wilcoxon modified by Z. Roth. When administered orally, an atraumatic metal probe was immersed in the stomach. Within 14 days monitored the overall health status and behavior of animals, the manifestation or absence of symptoms of intoxication; noted the features of feed and water ingestion, assessed the condition of the coat, physiological functions. Then groups of experimental rats were euthanized and pathomorphologically examined. We studied the effect of "Bisolbi" with repeated introduction and on not purebred dogs. Two groups of 3-4 years of age were completed with an average initial body weight of 13.63 ... 15.11 kg. Before use, the additive was thoroughly mixed with feed. The drug was injected during 31 days at a dose of 0.5 g / kg. Dogs of the control group (three) were fed wheat flour. After 15 and 31 days in laboratory animals in order to characterize the general condition in the blood, the amount of protein, urea, glucose, creatinine, cholesterol were determined. Based on studies it was found that the drug daily application by animals, is low toxic and safe, does not provoke the development of pathological reactions. According to the Hodge and Sterner classification "Bisolbi" can be attributed to the 6th class of toxicity - relatively harmless. Accordingto GOST 12.1.007-76 LD50 of the drug is more than 151 mg / kg, but less than 5000 mg / kg it is the 3rd hazard class (moderately hazardous).

The Effects of the "XGTQ" Medicine in Treating Cirrhosis in Wistar Rats

2020 ◽  
Vol 06 ◽  
Author(s):  
Ngan Nguyen Hoang ◽  
Thang Duong Minh ◽  
Tuan Anh Hoang ◽  
Son Le Ngoc Bich ◽  
Duong Nguyen Huu ◽  
...  
Keyword(s):  
Wistar Rats ◽  
Reference Group ◽  
Control Group ◽  
Plain Water ◽  
Group 4 ◽  
White Rats ◽  
Collagen Accumulation ◽  
Activity Of Enzymes ◽  
Group 3 ◽  
Group 1

Objectives: Evaluate the effects of "XGTQ" in the treatment of cirrhosis induced by Carbon tetrachloride (CCL4) in combination with alcohol and high-fat diet on Wistar rats. Materials and methods: Cirrhosis on white rats was induced by subcutaneously injecting CC14 at an initial dose of 5,0ml/kg, followed by 1,2ml/kg once a week in 10 weeks. Then, fed with synthetic food, added 20% fat, and 0.05% cholesterol and iron oxalate. Rats were administered every day with plain water and 1 day with water mixed with 30% ethanol. The rats were randomly divided into 5 groups and given distilled water (group 1 and 2 or control group), silymarin (group 3 or reference group) or the "XGTQ" drug extract (group 4, 5) for 4 weeks. Collected blood for biochemical test and liver were dissected to evaluate weight, morphology and quantified 4-hydroxyproline to evaluate fibrosis and collagen accumulation. Results: In cirrhotic wistar rats, "XGTQ" drug at 19.6 g/kg/24h and 58.8 g/kg/24h showed the ability of reducing the activity of enzymes AST, ALT in the blood (p<0.01), increasing plasma albumin and decreasing prothrobin time (p<.05); improving physical condition, macroscopic and microscopic images of H&E-stained liver; decreasing the concentration of hydroxyproline in the liver and reducing the level of cirrhosis on the masson-stained templates. The effects of "XGTQ" increased with the dose, and was equivalent to silymarin at the dose of 70 mg/kg/24h. Conclusion: The extract of "XGTQ" drug is effective in treating cirrhosis in Wistar rats.

scholarly journals Antidiabetic and antihyperlipidemic activities of Cucumis melo var. momordica fruit extract on experimental animals

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Arvind Kumar Srivastava ◽  
Alok Mukerjee ◽  
Abhishek Tripathi
Keyword(s):  
Blood Glucose ◽  
Cucumis Melo ◽  
Biological Properties ◽  
Positive Control ◽  
Positive Control Group ◽  
Public Health Issue ◽  
Control Group ◽  
Fruit Extract ◽  
Experimental Animals ◽  
Glucose Levels

Abstract Background Diabetes mellitus is a major public health issue related to the irregular metabolism of carbohydrates, protein, and fat. It occurs due to insufficient insulin production and insulin action. Cucumis melo possesses several biological properties including antioxidant, anti-inflammatory, antibacterial, antihypothyroidism, and antiangiogenic activities. The objective of the present study was to determine the antidiabetic and antihyperlipidemic activities of Cucumis melo var. momordica fruit extract on experimental animals. Result Results show that treatment with C. melo fruit extract and fraction caused a reduction in blood glucose levels. Cucumis melo toluene fraction (CMTF) exhibited a significant (*P < 0.05) reduction of blood glucose level on the 28th day, i.e., 122 mg/dL, in comparison with the positive control group (streptozotocin (STZ)). However, the extract of C. melo showed less significant results in comparison with CMTF. Triglyceride, LDL, and VLDL levels were increased chronically due to STZ and were significantly (*P < 0.05) restored to 84.16, 86.97, and 19.73, respectively, by CMTF in comparison with the positive control group (STZ in the dose of 55 mg/kg). The extract-treated groups also showed similar results as CMTF, but their efficacy was lesser than CMTF. Conclusion It is can be concluded that C. melo fruits can be used as an effective antidiabetic and antihyperlipidemic drug. Graphical abstract

The Effect of Sodium Nitrite on Experimental Animals

1942 ◽  
Vol 6a (1) ◽  
pp. 63-73 ◽  
Author(s):  
H. L. A. Tarr ◽  
N. M. Carter
Keyword(s):  
Sodium Nitrite ◽  
Lethal Dose ◽  
Oral Route ◽  
Female Rats ◽  
Male Rats ◽  
Subcutaneous Route ◽  
Healthy Male ◽  
Experimental Animals ◽  
White Rats ◽  
Healthy Female

Incorporation of sodium nitrite in the diet of cats and white rats on the basis of an average sized man consuming 1 lb. (454 g.) of fish containing 0.2 per cent (908 mg.) of this salt daily for six days each week does not appear to affect their growth rate nor the development (weight) of their thyroid, heart, lungs, spleen, liver, kidneys or adrenals. The fecundity of white rats as judged by their ability to breed and raise normal litters is apparently not affected thereby. The lethal dose of sodium nitrite by oral route is about 1.1 to 2.0 g./kg. for healthy male rats, 0.46 to 1.2 g./kg. for healthy female rats and 0.073 g./kg. for cats (one animal). The lethal dose by subcutaneous route is about 0.19 to 0.20 g./kg. for healthy male rats and 0.057 to 0.13 g./kg. for healthy female rats.

Hemostasis in rats with different levels of motor activity after vital stress

2019 ◽  
Author(s):  
Ю.А. Бондарчук ◽  
О.В. Алексеева ◽  
И.И. Шахматов ◽  
Ю.Б. Лебедева ◽  
Е.Ю. Медведева
Keyword(s):  
Motor Activity ◽  
Male Rats ◽  
Control Group ◽  
Psychoemotional Stress ◽  
Partner Death ◽  
Mental Trauma ◽  
Total Body ◽  
Antithrombin Iii Activity ◽  
Different Levels ◽  
Body Response

Введение. Психоэмоциональный стресс, связанный с риском для жизни и здоровья (витальный стресс), вызывает комплексную ответную реакцию всего организма. Система гемостаза, обеспечивающая жидкостные характеристики циркулирующей крови, играет существенную роль в формировании процессов адаптации или дезадаптации. Нарушения равновесия в процессах свертывания и противосвертывания вместе с изменениями микроциркуляции являются основой патогенеза острых и хронических заболеваний с развитием тромботических либо геморрагических осложнений. Цель исследования: оценить состояние системы гемостаза у крыс с разным уровнем двигательной активности после острой психогенной травмы в виде витального стресса. Материалы и методы. Исследования выполнены на 44 лабораторных половозрелых крысахсамцах линии Wistar, которые составили 2 экспериментальные группы с низкой (n 15) и высокой (n 15) двигательной активностью и контрольную группу интактных животных (n 14). Спонтанную двигательную активность оценивали с помощью теста открытое поле . В качестве острого психотравмирующего воздействия использовали модель психической травмы у крыс в виде витального стресса, вызванного переживанием гибели партнера от действий хищника. Результаты. Острое психотравмирующее воздействие у животных с низкой двигательной активностью вызывало угнетение агрегации тромбоцитов. В группе животных с высокой двигательной активностью была выявлена гиперкоагуляция по внешнему пути активации плазменного гемостаза, а также на конечных этапах коагуляции. В обеих экспериментальных группах наблюдали укорочение времени полимеризации фибринмономера, снижение уровня фибриногена, а также активности антитромбина III на фоне активации фибринолиза. Заключение. Изменения состояния системы гемостаза у крыс с разным уровнем двигательной активности после острого психоэмоционального стресса имели одинаковую направленность, но различную степень выраженности ответной реакции. Полученные результаты позволяют охарактеризовать однократное психоэмоциональное воздействие как не выходящее за рамки эустресса (по данным коагулограммы). Introduction. Psychoemotional stress associated with the risk to life and health (vital stress) causes a complex total body response. Hemostasis supports fluid characteristics of circulating blood and plays a significant role in the formation of adaptation or disadaptation processes. Imbalance in the processes of coagulation and anticoagulation with microcirculation changes are the basis of pathogenesis of acute and chronic diseases with the development of thrombotic or hemorrhagic complications. Aim: to assess hemostasis state in rats with different levels of motor activity after acute psychogenic trauma (vital stress). Materials and methods. The studies were performed on 44 laboratory matured Wistar male rats that were divided into 2 experimental groups with low (n 15) and high (n 15) motor activity and a control group of intact animals (n 14). Spontaneous motor activity was assessed using the open field test. A model of mental trauma was used for the formation of acute psychotraumatic effect in rats in the form of vital stress caused by the experience of partner death from a predator. Results. Acute psychotraumatic effect in animals with low motor activity caused inhibition of platelet aggregation. In animals with high motor activity, hypercoagulation was revealed in the external pathway of plasma hemostasis activation, as well as at the final stages of coagulation. Shortening of fibrin monomer polymerization time, decreasing of fibrinogen level and antithrombin III activity with fibrinolysis activation were observed in both experimental groups. Conclusion. After acute psychoemotional stress hemostasis changes in rats with different levels of motor activity had the same direction, but different intensity of response. The obtained results allow to characterize a single psychoemotional effect as not exceeding the limits of eustress (according to the coagulogram data).

EVALUATION OF TOXIOLOGICAL INDICATORS OF MONTHMORRILLONITE CLAY FOR THE PURPOSE OF USING THEM AS ALUMOSILICATE SOBENT AGAINST THE NEGATIVE EFFECT OF MYCOTOXINS ON THE BODY OF ANIMALS AND BIRDS

2021 ◽  
Vol 1 (1) ◽  
pp. 72-78
Keyword(s):  
Experimental Studies ◽  
The Body ◽  
Montmorillonite Clay ◽  
Test Substance ◽  
Negative Effects ◽  
Experimental Animals ◽  
Eyelid Edema ◽  
White Rats ◽  
Mucous Membranes ◽  
Negative Effect

The article presents the results of laboratory studies to assess the toxicological parameters of montmorillonite clay from the Pogadaevskoye deposit in the West Kazakhstan region in order to use them as an aluminosilicate sorbent in the composition of feeds that reduce the negative effects of mycotoxins on the body of animals and birds. The relevance of research is associated with the cultivation of healthy and highly productive animals and poultry in order to ensure the food security of the Republic of Kazakhstan.The studies carried out to assess the toxicological parameters of montmorillonite clay in order to use them as an aluminosilicate sorbent in experimental animals (rabbits and white rats) allowed the following results to be obtained: Visual study of the intensity of erythema when exposed to the test substance on the skin of rabbits showed their absence (0 points). The study of the intensity of edema (an increase in the thickness of the skin clutch of rabbits) when exposed to the test substance on the skin of rabbits showed no reaction (0 points). Studies evaluating the irritating effect of the test substances on the mucous membranes of the eyes of rabbits by symptoms of damage showed the absence of hyperemia (0 points). Weak eyelid edema (1 point), the minimum amount of discharge in the corner of the eye (1 point). The results of studies on the classification assessment of the test substance for the severity of the irritant effect on the eyes of rabbits showed that the average total score of the severity of the irritative effect corresponds to 1 point. A comprehensive analysis of the results obtained on the basis of scientific and experimental studies to assess the toxicological indicators of montmorillonite clay from the Pogadaevskoye deposit in relation to irritating effects on the skin and mucous membranes of experimental animals (rabbits) showed their harmlessness.

scholarly journals Initial Tests on Selected Serological Reactions in Rabbits Burnt with Napalm and Subjected to Hyperbaric Oxygenation

2015 ◽  
Vol 50 (1) ◽  
pp. 41-45
Author(s):  
Kazimierz Ulewicz ◽  
Przemysław Michniewski ◽  
Brunon Kierznikowicz ◽  
Bogdan Łokucijewski ◽  
Jan Stencel
Keyword(s):  
Hyperbaric Oxygenation ◽  
Healing Process ◽  
Control Group ◽  
Complement Activity ◽  
Experimental Animals ◽  
Burn Wounds ◽  
Immunological Reactions

Abstract Hyperbaric oxygenation therapy has found its application in the treatment of various types of burns. The presented work describes the use of this method in treating napalm burns in experimental animals. The researchers took particular interest in the immunological reactions occurring in animals, as well as the effect of the said therapy on the healing process. Two groups of rabbits, previously anaesthetised with Evipan and immunised with S. typhi phage F7 microorganisms, were burnt with the use of napalm. The tested group was subjected to a series of treatment sessions with 100% oxygen at the pressure of 2 atm, whereas the control group did not undergo such treatment. Six repeated tests on complement activity with 50% haemolysis method and heamagglutination reaction quantification with antigens O and H S.typhi phage F7 were carried out on all of the researched animals. Moreover, for the purpose of control of the healing process, a number of histopathological exams on the burn wounds were conducted in both groups of rabbits. The research showed an increase in complement activity in all tested animals; however, in the tested group it occurred later. Histopathological tests confirmed a more advanced healing process in the group subjected to hyperbaric oxygenation.

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