Saratov JOURNAL of Medical and Scientific Research

hypoxia

Features of angiogenesis in skin tissue regeneration

Year: 2019, volume 15 Issue: №1 Pages: 104-107
Heading: Physiology and Pathophysiology Article type: Review
Authors: Pronina Е.А., Stepanova T.V., Kiriyazi T.S., Maslyakov V.V., Ivanov A.N.
Organization: Saratov Medical University "Reaviz", Saratov State Medical University, Saratov State Technical University n.a. Yu.A. Gagarin
Summary:

Restoration and regeneration of tissues are complex processes involving a large number of signaling mechanisms. In this study possible mechanisms of angiogenesis during tissue regeneration are presented. One of these mechanisms is the creation of a new capillary layer by angiogenesis. Previously it was believed that high and rapid levels of capillary growth are necessary for optimal healing of tissues. But several studies have demonstrated that a period of vascular regression occurs after the growth of blood vessels in a wound, and the number of the newly formed vessels decreases until the number of the blood vessels is equal to the density of the vascular network in the intact tissue. Reduced inflammation and angiogenesis are features of optimal healing.

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Microgliocyte argentation on histological sections of hippocampus of rabbits

Summary:

Purpose: to obtain morphological data to identify microglia on histological sections of hippocampus of rabbits using silver salt impregnation. Material and methods. Histological sections of hippocampus of rabbits impregnated with salt deposited silver. Using the Rio Hortega method for detecting fibrous glia, choose the desired chemical composition and acid-base parameters of the silver solution and reducing agent for the detection of microglia. Results. In histological sections of the hippocampus revealed microglia contrast with branched spikes and cells without shoots with thin flagellums. Conclusion. In visiting the experiments carried out in natural conditions, it is crucial to conduct biomedical research in the shortest possible time. We need to get not only the functional results of research, but also by their morphological, substantiating the data. The present method of impregnation microglia can be used as a rapid method for the morphological study of cerebral blood flow and neural tissue hypoxia.

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Identify of argyrophilic cells of astrocytic glia to determine the hypoxic changes in nerve tissue

Summary:

Aim: identification of astrocytic glia cells impregnated to determine the hypoxic changes in nerve tissue. Material and methods. Condition of hypoxia was simulated in laboratory rats with "jar hypoxia". For the impregnation of histo-logical sections were used as a basis for the method of Rio-Gortega. Results. Silver impregnation method revealed several morphological forms of astrocytic cells in hypoxic changes in the nervous tissue of the brain. Conclusion. There were marked morphological brain astrocyte cell forms reflecting their functional state. Traced compensatory changes astrocytic cell depletion of these processes and the appearance of pathological morphological characters, up to the fragmentation and destruction of cells.

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The study of acute toxicity and antihypoxic activity of new metal complexes of iron

Year: 2015, volume 11 Issue: №2 Pages: 146-150
Heading: Clinical Pharmacology Article type: Original article
Authors: Shakhmardanova S.A.
Organization: Moscow State Humanitarian University of Economics
Summary:

The Purpose: to determine the acute toxicity of new metal complexes of iron derived vinylimidazole and to reveal their antihypoxic activity in comparison with Acyzol and other known antihypoxic etomersol and hypoxen. Material and methods. Antihypoxic activity was studied in experiments on nonlinear white mice-males 4 models of acute hypoxia (hypobaric, hypoxia with hypercapnia, hemic, histotoxic). Rates of acute toxicity (LD16, LD LD ) were calculated graphically by the method of Miller and Tainter. Changes in oxidative metabolism in mice under the influence of the most active compounds were assessed by the values of oxygen consumption and rectal temperature. Results. The studied metal complexes of iron are small and moderately toxic. The connection under the code of Tetravim on the severity of antihypoxic effect (the increase in life expectancy male mice compared to control groups on 20-127%) in the range of doses studied (5-250 mg/kg, i/p) is superior to other derivatives of vinylimidazole known and antihypoxic: etomersol (25-100mg/kg, i/p) and hypoxen (50-150 mg/kg, i/p). Conclusion. The obtained data on the pharmacological activity of Tetravim require further clarification of the mechanism of antihypoxic effect and clinical trials with the aim of putting it on the drugs market as a promising antihypoxic agent.

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Optimization technique of the stay of person in the middle-altitude conditions

Year: 2013, volume 9 Issue: №4 Pages: 684-686
Heading: Therapeutic exercise, sports medicine Article type: Original article
Authors: Borisenko О.V., Khramov V.V., Shpitalnaya V.P., Tolstokorov S.A.
Organization: Saratov State Medical University
Summary:

The objective: In order to improve exercise capacity in the middle-altitude conditions a technique of urgent adaptation with use of the compact device has been developed. Material and Methods. The study included two groups of people involved in mountain tourism, on the move and stay in the midlands, which used (experimental group) and didn't use (control group) the developed technique. Considering the specificity of observations directly on the mountain route, the compact equipment and functional studies (pulse oximetry, spirometry, peak flow, the dynamic measurement of pulse and blood pressure with the calculation of double product index) were used to monitor the experiment. Results. During the experiment changes of the data characterizing positive development of the functioning of human cardiore-spiratory system during the physical activities in the conditions of middle mountains were recorded (peak expiratory flow rate (from 512,86 to 592,86 I / min, t = 2,25, or by 115,6% in the experimental group) and double product index (from 95,66 to 127,09 units., t = 2,41, or by 132,9% in the experimental group). Conclusion. Thus, the offered device and its technique compose an effective scheme of preliminary preparation of cardiorespiratory system to stay in the middle-altitude condition and can be recommended for use in need short-term adaptation.

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Pathogenetic significance of biochemical markers in evaluation of nail destruction

Year: 2013, volume 9 Issue: №2 Pages: 286-290
Heading: Clinical Laboratory Diagnostics Article type: Original article
Authors: Urazovskaya E.V. Mikashinovich Z.I.
Organization: Rostov State Medical University of Ministry of Health and Social Development of the Russian Federation
Summary:

The purpose of the article is to evaluate the state of metabolic status of patients with distal onycholysis of hands. Materials and methods: Evaluation of hemoglobin, red blood cells, neutrophil granulocytes, the level of glycolytic processes of lactate and pyruvate, the activity of superoxide dismutase, catalase, myeloperoxidase, neutrophil elastase, serum alkaline phosphatase activity, as well as degradation products content of collagen structures to relative fractions of the blood free and peptide bound oxyproline. Results: It has been shown that free fraction oxyproline in 18 women with distal onycholysis of hands and hemoglobinemia prevails over peptide bound oxyproline fraction in blood, activated glycolytic processes on the modulation mechanism of adaptation with a slight increase of the lactate and pyruvate, the inhibition of activity of antioxidant enzymes, alkaline phosphatase and serum first phase elongation of blood coagulation as a result of the activated plasma recalcification time. Conclusion: The functional state of red blood cells, neutrophil granulocytes in the oppression of the first line of antioxidant enzyme defense and extension in patients with distal onycholysis of hands points to the formation of a mixed type of chronic hypoxia.

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