To the doctrine of the intravital coloration of the reticuloendothelial system in experimental animals

1930 ◽  
Vol 26 (4) ◽  
pp. 438-438
Author(s):  
L. I. Vilensky
Keyword(s):  
Connective Tissue ◽  
Reticuloendothelial System ◽  
The Body ◽  
Experimental Animals ◽  
White Rats ◽  
Medical Societies ◽  
Physiological Properties ◽  
Reticulo Endothelial System

Meetings of medical societies. Society of Physicians at Kazan University. General Sessions Session 4 March 1930 L.I. Vilensky. Towards the doctrine of the intravital coloration of the reticuloendothelial system in experimental animals. On the basis of a study of 267 animals of various species (rabbits, rats, pigs, white mice, white rats and dogs) the vivo coloring of trypanblau, pyrrholblau, carmine and collargol, the author comes to the following conclusions: 1) All active cellular elements of the indifferent connective tissue that has retained the embryonic properties of the mesenchyme. 2) Teaching-Aschoff's, in the light of intravital coloration, should be expanded, as the teaching of an active mesenchyme, scattered throughout the body, but united by common physiological properties. 3) The process of gradual absorption of colloidal paint in individual elements of the reticulo-endothelial system has a certain pattern, which is exactly the same in different animals.

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 Toxicity assessment of a technical product of the triazole class

2020 ◽  
Vol 99 (11) ◽  
pp. 1276-1279
Author(s):  
Valery N. Rakitskii ◽  
Tatiana M. Epishina ◽  
Elena G. Chkhvirkiya
Keyword(s):  
Body Weight ◽  
The Body ◽  
Male Rats ◽  
Acute Oral Toxicity ◽  
Oral Toxicity ◽  
High Biological Activity ◽  
Experimental Animals ◽  
Technical Product ◽  
White Rats ◽  
Toxicological Studies

Introduction. Historically, pesticides are evaluated more strictly from a medical point of view than other chemicals. Since their features, such as deliberate introduction into the environment, the possibility of contact with them by large masses of the population, and the high biological activity determine their potential danger to humans. Purpose of research - study of the biological effect of a technical product derived from triazoles when it is repeatedly ingested orally in mammals (rats), establishment of inactive and active doses, justification of the permissible daily dose (DSD) for humans. Material and methods. In acute experiments, white rats were used, including 6 animals in the group. Tested dose: 500-4000 mg/kg of body weight. A chronic (12 months) experiment was performed on 80 male rats with a bodyweight of 180-190 g at the beginning of the study. Tested doses: 5.0; 16.0 and 55.0 mg/kg of body weight (1 control and 3 experimental animals, 20 individuals each). In the dynamics of the experiment, we observed the condition and behavior of animals, water, and food consumption, recorded the timing of death, changes in body weight, physiological, biochemical, and hematological indices. Results. Indices of the acute oral toxicity on the studied product LD50 male rats were 2250 ± 483 mg/kg body weight. The dose of 5.0 mg / kg of body weight was not found to cause significant changes in all studied indices. The doses of 16.0 and 55.0 mg/kg of body weight had a polytropic effect on the body in experimental animals. Discussion. The studied product for the acute oral toxicity refers to low-hazard compounds, the doses of 16.0 and 55.0 mg/kg of body weight has a polytropic effect on the mammalian body, causing changes in carbohydrate, lipid, and lipoprotein metabolism in the body of rats - was accepted as acting. The dose of 5.0 mg / kg of body weight, when administered in rats, there are no changes in all the studied parameters throughout the experiment, is accepted as invalid. Based on the inactive dose-5.0 mg/kg of body weight and taking into account the reserve factor of 100, we have scientifically justified DSD for a person at the level of 0.05 mg/kg. Summary. The conducted sanitary and Toxicological studies indicate the need to assess the toxicity of new technical products to the mammalian body, to increase the reliability of the developed hygiene standards in environmental objects and food products.

Discussion. The fate of antigen

1956 ◽  
Vol 146 (922) ◽  
pp. 34-36 ◽  
Keyword(s):  
Fluorescent Antibody ◽  
Active Form ◽  
Chemical Properties ◽  
Liver Parenchyma ◽  
Reticuloendothelial System ◽  
Immunological Tolerance ◽  
The Body ◽  
Physico Chemical ◽  
Foreign Materials ◽  
Reticulo Endothelial System

I should like to discuss an approach to the problem of immunological tolerance, which is closely akin to Burnet & Fenner’s (1949) ‘self-marker’ hypothesis, although its emphasis is less on the question of how antibodies are produced than on the detailed fate of potentially antigenic molecules when they leave the plasma and lymph and are catabolized. Dr Cinader’s figures certainly suggest that in tolerant rabbits heterologous albumin is eliminated from the plasma at rates which are substantially identical with those of homologous albumin. This is true also of heterologous plasma proteins in normal rabbits during the period before antibodies appear. Furthermore, we have found that in normal rats, in which albumin and globulin are eliminated at markedly different rates (Campbell, Cuthbertson, Matthews & McFarlane 1956), heterologous albumin behaves much like rat albumin and heterologous γ -globulin like rat γ -globulin for a week or more. It is a reasonable working hypothesis that foreign materials in the circulation are in the first place removed from the tissue fluids by the same mechanisms as deal with native materials possessing similar physico-chemical properties (e.g. molecular weight, surface charge). We are largely ignorant of what these mechanisms might be, except for the part played by reticulo-endothelial cells in removing particulate matter and denatured or aggregated proteins. However, the use by Coons, Leduc & Kaplan (1951) of fluorescent antibody to locate antigenic material in histological sections has shown that apparently undenatured proteins (e.g. bovine albumin, human γ -globulin) introduced into the plasma are detectable in immunologically active form within a wide variety of cells, such as renal tubule cells, liver parenchyma or vascular endothelium, in addition to cells of the reticuloendothelial system proper. There are possibly at least two processes going on concurrently: first, a non-selective ingestion of their surrounding fluid (with all that it contains) by cells which are widely distributed in the body, and are not necessarily confined to the reticulo-endothelial system. The mechanism may well be one of vacuolar ingestion (‘pinocytosis’), for which there is some circumstantial evidence, but which also presents difficulties. This would be one mechanism responsible for normal plasma protein catabolism. Secondly, there may be a selective removal of particulate or aggregated material, especially when negatively charged, by cells of the reticulo-endothelial system, notably by liver Küpffer cells.

ECOLOGICAL AND HYGIENIC INVESTIGATION OF THE ADAPTOGENIC HERBAL PRODUCTS TO INCREASE RESISTANCE OF THE ORGANISM TO CONDITIONS OF LOW AND HIGH TEMPERATURES

2016 ◽  
Vol 1 (61) ◽  
pp. 46-51
Author(s):  
Литовченко ◽  
Ekaterina Litovchenko ◽  
Коршунова ◽  
Natalya Korshunova ◽  
Доровских ◽  
...  
Keyword(s):  
Lipid Peroxidation ◽  
High Temperatures ◽  
Malonic Dialdehyde ◽  
Antioxidant Effect ◽  
The Body ◽  
Diene Conjugates ◽  
Herbal Products ◽  
Experimental Animals ◽  
White Rats ◽  
Methodological Approaches

The purpose of this research was to study the possibility of using of food products from a mixture of Hypericum perforatum (HP) and Rhodiola rosea (RR) for the stimulation of the body´s compensatory responses to the conditions of high and low temperatures. Experiments have been conducted on experimental animals (150 white mongrel rats) in accordance with generally accepted methodological approaches. Antioxidant effects in the organism of white rats have been studied at the initiation of the processes of lipid peroxidation by the introduction of carbon tetrachloride. We were determined the products of lipid peroxidation (diene conjugates, hydroperoxides of lipids, malonic dialdehyde) for the evaluation of antioxidant effect in accordance with generally accepted methodological approaches. Researches of cold and heat adaptation reactions of experimental animals have been conducted by using the model of a long cold and heat action with appropriate climatic chambers. It was established experimentally that in doses of 150-300 mg/kg daily of the studied mixture has a strong antioxidant effect in the conditions of cold and heat stress on warm-blooded organism. The research allows to recommend a mixture of HP and RR as а regulator of adaptive reactions of the organism when exposed to low and high temperatures.

scholarly journals STRUCTURAL CHANGES IN PROSTATE OF REPRODUCTIVE AGE RATS UNDER IMMUNOSUPPRESSION

2018 ◽  
Vol 35 (3) ◽  
pp. 79-86
Author(s):  
S A Kaschenko ◽  
A A Zakharov
Keyword(s):  
Epithelial Cells ◽  
Body Mass ◽  
Structural Changes ◽  
Microscopic Level ◽  
The Body ◽  
Reproductive Age ◽  
Cell Nuclei ◽  
Experimental Animals ◽  
White Rats ◽  
Level Height

Aim. To establish the structural changes in the prostate of reproductive experimental animals in conditions of long immunosuppression. Materials and methods. Sixty white rats of reproductive age were studied. The state of immunosuppression was modeled with intramuscular introduction of cyclophosphamide in the dose of 1.5 mg/kg of the body mass during 10 days. Linear sizes and volume of the organ were determined. At the microscopic level, height and width of epithelial cells, their volume as well as large and small diameters and cell nuclei volumes were determined. Results. In response to long immunosuppressive impact, organometric indices of the prostate both in the early (on days 7, 15) and late (on day 30) observation periods decreased owing to indirect cytotoxic impact of cyclophosphamide on the glandular and stromal components of the organ. Conclusions. The decreased values of linear-volumetric micromorphometric indices within the same observation periods confirm the dynamics of organometric parameters of the gland and prove intensive response of the organ at micro-and-submicroscopic level.

DEVELOPMENT OF AN EXPERIMENTAL MODEL OF AVITAMINOSIS F

2020 ◽  
Vol 20 (2) ◽  
pp. 38-40
Author(s):  
A. Levitsky ◽  
A. Lapinska ◽  
I. Selivanskaya
Keyword(s):  
Fatty Acids ◽  
Experimental Model ◽  
Unsaturated Fatty Acids ◽  
Saturated Fatty Acids ◽  
Coconut Oil ◽  
The Body ◽  
Regulatory Function ◽  
Omega 3 ◽  
White Rats ◽  
Arachidonic Acids

The article analyzes the role of essential polyunsaturated fatty acids (PUFA), especially omega-3 series in humans and animals. The biosynthesis of essential PUFA in humans and animals is very limited, so they must be consumed with food (feed). Тhe ratio of omega-3 and omega-6 PUFA is very important. Biomembranes of animal cells contain about 30% PUFA with a ratio of ω-6/ ω-3 1-2. As this ratio increases, the physicochemical properties of biomembranes and the functional activity of their receptors change. The regulatory function of essential PUFA is that in the body under the action of oxygenase enzymes (cyclooxygenase, lipoxygenase) are formed extremely active hormone-like substances (eicosanoids and docosanoids), which affect a number of physiological processes: inflammation, immunity, metabolism. Moreover, ω-6 PUFA form eicosanoids, which have pro-inflammatory, immunosuppressive properties, and ω-3 PUFAs form eicosanoids and docosanoids, which have anti-inflammatory and immunostimulatory properties. Deficiency of essential PUFA, and especially ω-3 PUFA, leads to impaired development of the body and its state of health, which are manifestations of avitaminosis F. Prevention and treatment of avitaminosis F is carried out with drugs that contain PUFA. To create new, more effective vitamin F preparations, it is necessary to reproduce the model of vitamin F deficiency. An experimental model of vitamin F deficiency in white rats kept on a fat –free diet with the addition of coconut oil, which is almost completely free of unsaturated fatty acids, and saturated fatty acids make up almost 99 % of all fatty acids was developed. The total content of ω-6 PUFA (sum of linoleic and arachidonic acids), the content of ω-3 PUFA (α-linolenic, eicosapentaenoic and docosahexaenoic acids) in neutral lipids (triglycerides and cholesterol esters) defined. Тhe content of ω-6 PUFA under the influence of coconut oil decreased by 3.3 times, and the content of ω-3 PUFA - by 7.5 times. Тhe influence of coconut oil, the content of ω-6 PUFA decreased by 2.1 times, and the content of ω-3 PUFA - by 2.8 times. The most strongly reduces the content of ω-3 PUFA, namely eicosapentaenoic, coconut oil, starting from 5 %. Consumption of FFD with a content of 15 % coconut oil reduces the content of eicosapentaenoic acid to zero, ie we have an absolute deficiency of one of the most important essential PUFAs, which determined the presence of vitamin F deficiency.

Indicators of metabolism and biochemical status of blood in horses of Yakut breed in winter and spring seasons

2020 ◽  
pp. 52-65
Author(s):  
U. Khompodoeva ◽  
R. Ivanov
Keyword(s):  
Classical Method ◽  
Live Weight ◽  
Weather Conditions ◽  
The Body ◽  
Metabolic Energy ◽  
Temperature Changes ◽  
Experimental Animals ◽  
Spring Period ◽  
Biochemical Status ◽  
Adaptive Mechanisms

The results of researches on the peculiarities of metabolism in the body of horses of Yakut breed in the winter and spring periods under the environments of Central Yakutia have been presented in the article. Physiological experiments on the digestibility of the main nutrients of the feed have been carried out in the winter (February) and spring (April) periods under the environments of the physiological yard in the Yakutsk Scientific and Research Institute of Agriculture named after M. G. Safronov with using the classical method. Five mares and five geldings of Yakut breed have been selected for researches. The average live weight of mares was 378–410 kg, geldings 394–403 kg. The experimental animals had average fatness. It has been found a higher intake of energy and the main nutrients of hay as a mono feed in winter compared to the spring period. At the same time pregnant mares in winter have been consumed 103,8±3,12 MJ of metabolic energy per head/day, which was 27,3 % significantly higher than in the spring period – 75,4±2,18 MJ (P ≥ 0,999). Geldings have been consumed in the experiment 67,70±2,85 MJ, which was by 43,7 % higher than in the spring period – 38,05 ± 4,40 MJ of metabolic energy per head/day (P ≥ 0,999). Experimental animals have been housed in stalls; there was no energy expenditure for movement, so the amount of energy consumed in winter indicates the production of heat in the animal’s body. Pregnant mares per 100 kg of live weight have consumed 31,5±4,11 MJ of metabolic energy or 33,3 % more than in the spring period – 21,0±1,98 MJ; geldings have consumed 27,69±1,12, which was 41,78 % significantly higher than in the spring – 16,12 ± 0,75 MJ (P ≥ 0,999). The high intake of metabolic energy into the body of Yakut horses in winter is explained by the manifestation of adaptive mechanisms that affect the effective metabolism for survival, adapted to frequent changes in weather conditions and sharp temperature changes. The established differences in the biochemical parameters of blood serum of horses of Yakut breed are associated with changes in the consumption and digestibility of basic nutrients and energy, depending on the ambient temperature.

Current Scientific Considerations in Regard to Defining a “Silicone Syndrome”/Disease and the Formation of Silica from Silicone

1998 ◽  
Vol 17 (4) ◽  
pp. 449-463 ◽  
Author(s):  
John A. Todhunter ◽  
Michael G. Farrow
Keyword(s):  
Connective Tissue ◽  
Patient Population ◽  
Breast Implant ◽  
Connective Tissue Diseases ◽  
The Body ◽  
Silicone Implants ◽  
Augmentation Mammoplasty ◽  
Patient Case ◽  
Increased Risk ◽  
Epidemiology Studies

Whether the constellation of various symptoms reported in various case-study reports on some patients who have had augmentation mammoplasty with silicone implants reflects a distinct, novel “silicone syndrome”or disease is important to settingproper endpoints for the epidemiological study of this patient population. To date, epidemiology studies on breast implant patients have focused on end-points which are typical of connective tissue disease, rheumatoid disease, and/ or autoimmune disorders. The consensus at this time, as was recently stated in a paper authored by Food and Drug Administration (FDA) personnel, is that the weight of the evidence from existing epidemiology studies is that silicone breast implants do not appreciably, if at all, increase the risk of these types of diseases. Critics of the epidemiology database have countered that had the analysis of association in these studies been done for a “silicone syndrome,” as opposed to the disease types which were analyzed, an association between silicone breast implantation and increased risk of “silicone syndrome” would have been observed. In the present analysis, this question is approached from two directions: First, the available single or multi-patient case reports available in the open literature were evaluated. The objective was to define those symptoms/ complaints that were reported in all studies or in at least 50% of the patients reported and to assign frequency distributions to individual symptoms or complaints reported in breast implant patients presenting for various complaints. By definition, if a “silicone syndrome” exists, then it can only be characterized by those symptoms or complaints which appear with regular frequency in patients so afflicted. Second, the symptoms or complaints which were used as criteria in the existing epidemiology studies were correlated with their frequency of occurrence among single or multi-patient case-reported breast implant patients. The working hypothesis in this present study is that if the number of “silicone syndrome” symptoms or complaints that also are symptoms of the existing epidemiology endpoints is large, then a distinct “silicone syndrome” is not likely to exist, and it can be concluded that existing epidemiology studies have adequately addressed the relevant issues. Also, to the extent that the frequency of symptom occurrence in “silicone syndrome” is similar to the distribution seen for known connective tissue, rheumatoid, and/ or autoimmune diseases, this will then add to the weight of evidence that no distinct “silicone syndrome” needs be postulated. Conversely, if a different set of symptoms or complaints occurs in silicone breast-implanted patients than is seen in patients with connective tissue diseases, this will argue that a distinct syndrome may exist. In the present study, the more recent suggestion that silicone may be broken down to silica in the body, and evidence for and against this suggestion are also discussed. The present analysis does not support the contention that a distinct “silicone syndrome” exists, but does support the contention that the disease endpoints used in existing epidemiology studies are adequate for examining the patient population. Also, consideration of the chemistry of silicone and its potential hydrolysis or oxidative cleavage indicates that if such reactions occur in the body at any significant rate, the product will be silicic acid, a normal and necessary constituent of the body, and not silica (i.e., silicon dioxide).

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.

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