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Biomedical subjects

I D Beliaeva

Publications and source records attributed to I D Beliaeva.

At least 19 recordsLinked to original sources
PubMed2003

[Preoperative care and surgical treatment of small-intestinal fistulas in children].

Experience in using complex treatment in 42 children with unformed small-intestinal fistulas, generalized defects of the anterior abdominal wall and severe disorders of alimentary status is presented. Their preoperative preparation included parenteral alimentation, enteral probe feeding with special elementary milk formulas, correction of metabolic disorders. Intestinoplication during surgery was carried out with the medicinal glue MK-7 to prevent intestinal obstruction and formation of interloop abscesses. The use of portions of the tendinous part of the musculus tensor fasciale late was one the simple and effective methods for plasty of anterior abdominal wall defects.

Adolescent↗
PubMed2003

[Artificial esophagus in children].

The aims of the study were: 1) to formulate up-to-date principles of coloesophagoplasty (CEP) and to compare methods of CEP; 2) to determine the optimal age for esophagoplasty in children with esophageal atresia; 3) to evaluate quality of life and long term results after esophagoplasty performed in childhood; 4) to present results of surgical treatment of pharynx stenosis in children. Over the last 50 years more than 2 thousand surgeries on the esophagus in children were performed including more than 600 operations of artificial esophagus creation. From 1995 in some patients we carried out extirpation of the esophagus with one-stage plastic operation coloesophagoplasty taken the transplant in the posterior mediastinum. From 1992 on the pharynx with free revascularized intestinal segment was performed in isolated stenosis of the pharynx. Case histories of 54 children aged from 3 months to 15 years were analyzed to compare methods of esophagoplasty when the esophagus was taken behind the sternum and in posterior mediastinum. Case histories of 27 children with atresia of the esophagus were analyzed for determination of optimal age for coloesophagoplasty. Responses to questionnaires were analyzed to evaluate quality of life. From 1980 ive hase operated 28 patients with scarry stenosis of the pharynx (isolated or in combination with esophageal stenosis). Current policy of surgical treatment of pharyngeal stenosis which is considered as surgery of choice-pharyngoplasty with a free intestinal transplant--is described. Development and clinical appliance of up-to-date principles of CEP permitted to reduce the number of complications and to decrease lethality from 3 to 0.5%. After introduction of antireflux cologastroanastomosis the number of complications due to reflux reduced. Extirpation of the esophagus may be valid in peptic stenosis, Barrett's metaplasia, tumors, portal hypertension or angiodisplasia, and in the majority of cases of scarry stenosis of the esophagus.

Adolescent↗
PubMed1990

[Experience with the use of plasmapheresis in the combined treatment of children with the crush syndrome].

Plasmapheresis (PP) was applied to the treatment of 5 children aged 6-14 years with the crush syndrome. The multimodality treatment using antibiotics, erythrocytic mass, rheologically active preparations, hemodialysis and blood rheologically active preparations, hemodialysis and hemoperfusion carried out for 6-7 days before PP did not bring about any appreciable improvement of the patients' status. The patients failed to get rid of anuria and manifested the signs of increasing intoxication. The treatment with PP consisted of 1 to 6 procedures, in the course of which 70 to 85 of the design volume of the circulating plasma was removed. The use of PP resulted in the disappearance of myoglobin from the patients' blood and urine, in the normalization of the coagulogram, a considerable decrease of the content of medium molecules, and in the appearance of the first urine towards the end of the procedure. Thus, the introduction of PP into multimodality treatment of the crush syndrome made it possible to eliminate anuria, disseminated intravascular coagulation, and to noticeably reduce intoxication and to clear the blood off myoglobin.

Adolescent↗
PubMed1990

[The diagnostic and prognostic value of the indices of the colloid-osmotic state of the blood in children with the crush syndrome].

Eighteen infants with compression syndrome (CS) were managed with simultaneous evaluation of changes in the blood colloid osmotic status. The examination findings showed that plasma osmolality is an integral index of endogenous intoxication which objectively reflects the gravity of the general condition of patients and requires adequate correction. The osmolality gap was measured by the difference between the measured and calculated osmolalities; its stable two- or threefold increase was found to be the most unfavourable factor in the disease course and prognosis. It was found that control of osmotic homeostasis in infants with CS is essential to decide that extracorporeal blood clearance techniques be used and to elaborate effective infusion therapy programmes.

Adolescent↗
PubMed1986

[Intracellular activity and secretion of various lysosomal glycosidases in cultured human skin fibroblasts].

The intracellular activities of four lysosomal glycosidases (alpha-L-fucosidase, beta-D-hexosaminidase, beta-D-galactosidase and beta-D-glucuronidase) in human skin fibroblasts cultured in a medium with 0.1% serum increased in a greater degree than that in a medium with 10% serum. Only two glycosidases (alpha-L-fucosidase and beta-D-hexosaminidase) were secreted by fibroblasts in the culture medium. The extracellular activity of alpha-L-fucosidase and beta-D-hexosaminidase was equivalent to 80 and 25% of their intracellular activity in serum-sufficient fibroblasts and 40 and 15%--in serum-restricted fibroblasts. These results suggest that the observer phenomena are controlled by the levels of autophagy, endocytosis and membrane recycling.

Cells, Cultured↗
PubMed1986

[Secretion of alpha-L-fucosidase by human embryonal skin fibroblasts].

The amount of alpha-L-fucosidase secreted by normal human fibroblasts was higher in the medium containing 10% bovine serum than in the medium containing 0.1% bovine serum. Glycosidase secretion was twice higher at the advanced than at the initial stage of subcultivation. Extracellular activity of alpha-L-fucosidase from 3 different fibroblast strains differed insignificantly in the medium containing 0.1% bovine serum, while intracellular activity of the enzyme in these strains was altogether different. The results suggest that the lysosomal glycosidase secretion is determined by the level of cellular endocytosis.

Culture Media↗
PubMed1984

[Lysosomal glycosidase activity in cultured human fibroblasts].

A study was made of the activity of 3 lysosomal glycosidases -beta-D-galactosidase (K. P. 3.2.1.23), alpha-L-fucosidase (K. P. 3.2.1.51), N-acetyl-beta-D-hexosoaminidase (K. P. 3.2.1.52) depending on the time after subcultivation and duration of the passage of human skin embryonal and postembryonal fibroblasts. It was established that changes in the specific activity of the enzymes should be calculated with reference to the cell rather than to protein whose amount might vary considerably. It was also found that for measuring the specific activity of enzymes, of great importance are the procedures of cell removal from the base layer (by mechanical scraping off or by trypsin solution) and the regimen of the homogenization of cell preparations.

Cells, Cultured↗
PubMed1982

[Passage through the mitotic cycle of ascitic hepatoma 22A cells under unfavorable artificially created conditions].

The author studied the changes in the mitotic cycle of ascites hepatoma 22A cells under artificially created unfavourable conditions. It was shown that as a result 3 tumors of 6-day development united. In the early stage of such a union there was a blockade in passage from G1 in S period and from G2 in mitosis. The cells which were in S period at the moment of union accumulated in G2 period and passed to the irreversible resting state. In the course of the union the cells in G1 period completely preserved the ability to complete the mitotic cycle.

Animals↗
PubMed1980

[G2 period and entrance into the resting state at different stages of mouse ascitic hepatoma 22A development].

In the course of AH22A development the size of G2 subpopulations (G2 period cell of the mitotic cycle) changes relatively little for the most part, slightly decreasing in the terminal stage. Five days before the terminal stage of AH22A the cell subpopulation was found to be in the reversible resting R2 stage (the population egressed from the mitotic cycle in G2 period). The size of the population increased with tumor growth. In the terminal stage, however, its size was insignificant (47%). Therefore, it is not possible to prove that cells accumulate in considerable amounts in the reversible resting R2 stage. This circumstance and a decrease in the size of G2 subpopulation and cell population in advanced tumors during the reversible resting R2 stage evidence that the latter one is of a relatively short duration in the course of cell egress from G2 period of the mitotic cycle in the irreversible resting stage.

Animals↗
PubMed1979

[Binuclear cells in rat liver during repair regeneration of the organ].

At early stages after partial hepatectomy (17 hours after the operation) binuclear cells become involved in proliferation in much lesser numbers, and 37 and 53 hours after the operation--in much greater numbers relative to their part in the population. New formation of binuclear cells (the presence of labeled binuclear cells 20 hours after the thymidine H3 administration) was the most intensive at the early regeneration stages (16--36 hours after the operation), when about 20% of mitoses are acytokinetic and lead to the formation of binuclear cells. At later periods only 8% of mitoses result in formation of binuclear cells.

Animals↗
PubMed1979

[Cells with fragmented nuclei in ascites hepatoma 22A and their participation in proliferation].

The number of cells with fragmented nuclei (FN) (mainly, multilobate) increased with aging of ascites hepatoma 22A (AH22A) as follows: 15 +/- 9.3% in the 6-day AH22A, 196 +/- 53% in the 14-day tumor and 453 +/- 51% in the delayed (18-day) AH22A. The basic way of FN formation was amitotic. About 150 and 170% of cells with FN in the 14- and 18-day AH22A were at the reversible resting R1 stage (or at the very long G1 period, more than 4 days). The rest of the cells, 50 and 230%, respectively, quit the mitotic cycle irreversibly and apparently undergo the involution that is faster during passage-stimulated division.

Animals↗
PubMed1978

[Reduction of the prereplicative period of the mitotic cycle in hepatocytes on repeated stimulation of divisions].

Repeated stimulation of division soon after the primary one (2--3 days later) induces a shorteining of the prereplicative phase of the mitotic cylce of hepatocytes to 9--10 hours in the regenerating rat liver. The cells dividing repeatedly after one stimulation were found to pass through the G1-phase of the second mitotic cycle during the same period. It may be suggested that the cells with the minimal duration of the prereplicative phase failed to pass through the transformation period. With increase of the time interval between the successive stimulation of divisions (to 4--5 days) increases the resting time state for most hepatocytes, and they lose the capacity to pass through the reduced prereplicative phases.

Animals↗
PubMed1978

[Characteristics of the mitotic cycle of cells during the terminal stage of development of ascitic hepatoma 22A].

The authors studied growth peculiarities of the ascitic hepatoma 22A at the terminal stage of development. As shown by the autoradiography method, some of the cells could be at the G1-period or at the R1-period for 2 or even 4 days; the average duration of the G2-period constituted 16 hours. 55--60% of the cells were at the much prolonged G1- and R1-period, 7%--at the S-period, and 9%--at the G2-period. The rest 25--30% of cells apparently leave the mitotic cycle irreversibly since they take no part in proliferation after the division stimulation.

Animals↗
PubMed1978

[Biological properties of the modified actinomycins synthesized by the aurantin producer].

The effect of 2 new modified actinomycins was studied. Actinomycin AuGl had the residue of sarcozin replaced by glycine and actinomycin AuNv had 1 residue of norvaline. It was shown that the new actinomycins had a similar to the actinomycin type effect on the microbial and animal cells. Still, higher concentrations of the antibiotics were required. In concentrations equal to those of actinomycins the new antibiotics were less effective with respect to the bacteriostatic action, suppression of the RNA synthesis and mitotic division of the ascitic hepatoma 22A cells.

Amino Acids↗