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Biomedical subjects

Iu I Afanas'ev

Publications and source records attributed to Iu I Afanas'ev.

At least 19 recordsLinked to original sources
PubMed2006

[The genetic markers and morphology of erythrocytes in the clinical manifestation of chronic obstructive bronchitis].

The aim of the study was to investigate genetic characteristics of patients with chronic obstructive bronchitis (COB) using classic biochemical markers, their contribution to the development and course of the disease, and morphological peculiarities of erythrocytes in these patients. The subjects were 60 COB patients and 50 practically healthy people; their serum samples were studied. The following classic biochemical markers were investigated: haptoglobin; transferrin; C3 compliment component; group-specific component; ABO blood systems and Rh-factor. Erythrocytometry of blood smears was performed upon admission and before discharge. The study evaluated the contribution of heredity to the forming of COB and established specific genetic markers of predisposition to the development of COB and certain features of its clinical course; the condition of peripheral blood erythrocytes in COB patients was studied.

Adult↗
PubMed1997

[Morphofunctional changes in animal skin during combined administration of zinc sulfate and vitamin A].

Morphological and histochemical skin properties were studied in male rats in single and successive peroral injections of Zinc sulphate and vitamin A. Long term (25 d) peroral administration of vitamin A 2 mg/100 g in dose was shown to cause hypozincaemia. Zinc sulphate and vitamin A are capable of influencing proliferation and protein metabolism of epidermal cells and number of lymphocytes and mast cells in dermis. With the aim of the drugs named thickness of epidermis, ratio of its layers thickness as well as the rate of protein synthesis in germinal layer of epidermis can be changed purposefully. These parameters depend both on the drug injection technique (single, separated or successive injections) and time periods. Perspective of obtaining a complexed biocoordinative compound on the base of vitamin A and microtrace element of Zinc is discussed.

Administration, Oral↗
PubMed1995

[The HLA-associated immunological mechanisms in rheumatic involvement of the myocardium].

The examination of 95 Uzbeks with rheumatic myocardium and 60 healthy subjects of the same nationality has found accumulation in the patients' phenotypes of antigens HLA-B17, HLA-B21 and HLA-Cw4. A high PHA-induced response of T-lymphocytes occurred in HLA-Cw4- and especially in HLA-B21-positive patients. The findings suggest participation of HLA-associated genes in the mechanisms of rheumatic process. These are thought responsible for rheumatism-specific cell immune reactions.

Adolescent↗
PubMed1995

[Role of trace elements in disorders and correction of metal ligand homeostasis].

Histological, biochemical, and biophysical techniques were used to examine the properties of a biocomplex compound prepared by using the well-known drug metronidazole, which affects gram-negative microbes, with the trace element zinc. The biocomplex was demonstrated to considerably enhance the efficiency of the parent ligand and to expand its action range. The new compound affected the body's immunity, promotes the recovery of its trace element balance and the development of compensatory and adaptative responses in the liver, kidney, spleen, and pancreas. The biocomplex-induced activation of regenerative processes occurred by changing the balance of 28 trace elements in the body. Changes in the skin and blood were analyzed after administration of zinc sulfate in combination with vitamin A (retinol palmitate). An assessment was made of morphological and histochemical changes in the malpighian epithelial cells while using these drugs alone and in combination.

Animals↗
PubMed1991

[Significance of HLA genetic factors in the origin of immunologic insufficiency in chronic bronchitis].

As many as 131 healthy persons (donors) and 83 patients suffering from chronic bronchitis, belonging to the Uzbek nationality were examined. It has been established that there are HLA genetic markers of predisposition and resistance to the development of chronic bronchopulmonary pathology in the population under study. The HLA phenotypic features of patients suffering from chronic bronchitis were reflected in the clinical manifestation of the broncho-obstructive syndrome and at the age of the disease debut. One of the mechanisms of the induction of the bronchopulmonary process in the Uzbek population was revealed by means of simulating the functioning of certain subpopulations of immunocompetent cells.

Adult↗
PubMed1988

[Reaction of human skeletal muscle fiber to a one-time physical load].

NADH-tetrazolium reductase and succinate dehydrogenase activity, glycogen concentration and ultrastructure of muscular fiber of a human being was studied before and after single physical load to refusal. The revealed individual peculiarities of fiber reaction in different people allow to divide all tested people into two subgroups according to the change of succinate dehydrogenase activity.

Adolescent↗
PubMed1986

[Effect of retinoic acid on the aggregation of erythrocytes and leukocytes in the blood].

Human and animal blood smear staining with PAPh has revealed mononuclear leukocyte-erythrocyte aggregates. Administration of retinoic acid increased concentration and dimensions of these aggregates and was followed by preferential accumulation of PAPh-negative osmotically unstable erythrocytes. Similar changes were detected in the blood samples of women engaged in the production of retinoic acid. Aggregate concentration showed positive correlation with erythrocyte sedimentation rate and no correlation with prothrombin time.

Animals↗
PubMed1985

[Erythrocyte-damaging and immunomodulating effect of retinoids].

The influence of retinyl acetate, retinoic acid and its esterified cis- and trans-derivatives, retinoids C15 and C20 on erythrocytes, liver macrophages and white pulp of the spleen was studied in the experiments on mice of different strains. It was found that administration of these compounds leads to the damage of the blood cells, increase in the number of liver macrophages and the share of white pulp in the spleen and stimulation of the local response to tuberculin. The interdependence of changes in the blood and adjuvant is suggested.

Adjuvants, Immunologic↗
PubMed1984

[Effect of retinoids on rat spleen].

It has been shown in experiments on Wistar male rats with the use of light and electron microscopy and morphometry that a single intraperitoneal injection of high doses of all-trans-methylretinoate and methyl-7,8- dihydroretinoate leads to an increase in the spleen weight, the appearance in the spleen of red cells changed in the shape, activation of phagocytic intensity of macrophages, intercellular interaction, lymphocyte proliferation and formation of new lymph follicles.

Animals↗
PubMed1983

[Effect of retinoids on the development and growth of experimental tumors].

The ability of six retinoids to inhibit cancer growth was tested on mice with Lewis lung carcinoma, PRG and RSM-5 tumors. It was shown that all tumors possess individual sensitivities to retinoids. The most effective substances were: methyl retinoate (all-trans and 13-cis isomers) and a retinoid with a small side chain and an oxidated beta-iononic ring (substance 3). Each of those three retinoids was tested for an ability to prevent methylcholanthrene-induced carcinogenesis in the skin. All-trans methylretinoate had the most pronounced effect; however, it was the most toxic, too.

Animals↗
PubMed1982

[Antitumor and toxic properties of retinoid C15].

A study was made of antitumor and toxic properties of retinoid C15 which has some characteristic structural features of retinoic acid natural metabolites; such as ethyl-2E, 4E-3-methyl-5-/2,6-dimethyl-6-ethoxycarbonyl-/3-oxo-1-cyclohexene-1-yl/-2,4-pentadienoate. The substance inhibited the growth of transplantable tumors of the uterine cervix. Lewis carcinoma and rumen cancer. This ability was dependent on the tumor growth rate. The substance proved less toxic then retinoic acid or methyl retionate. Injection of retinoid C15 was accompanied by the widening of the paracortical zone of the mesenterial lymph node and by the increased number of lymphoid follicles in the spleen.

Animals↗