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Biomedical subjects

E M Vasil'eva

Publications and source records attributed to E M Vasil'eva.

At least 19 recordsLinked to original sources

[Lipid peroxidation in neurological pathology in children].

The intensity of lipid peroxidation (LPO) was studied by the content of the listed below in erythrocytes of children with neurological pathology: diene conjugates, trienketones and LPO products. Intensified LPO processes were registered in children with neurology and primarily in those with cerebral spastic infantile paralysis (CSIP). The detected changes in the LPO products of erythrocyte membranes depended on a disease variation on an intellectual development of sick child. The LPO activation affects possibly the development (lesion) of craniocerebral innervation in patients. Changed LPO parameters were found in examined sick children to be most closely related with the development of their motor skills and with the formation of the bone-muscle system, thus, an essentially higher content of LPO products was registered in erythrocytes of children with a reduced muscular activity (in those not capable of sitting, standing or walking). Considering the above stated and with respect to the deficit of Vitamin E registered in such patients, children with CSIP or with impending CSIP need, obviously a prolonged membrane-stabilizing therapy by antioxidants and essential phospholipids including traps of radicals, which should cut the number of children with severe CSIP and with residual perinatal lesions of the central nervous system.

Biomarkers↗

[Biochemical changes of red blood cells in children with cerebral palsy and other organic brain disorders].

One hundred and twenty-five children with cerebral palsy (n = 108) and organic CNS lesions (n = 17) have been studied. A control group included 30 children without any neurological lesions. Lipids and phospholipids spectra, Ca, Mg- and Na, K-ATPases, intensity of red blood cells lipid peroxidation and erythrocyte free magnesium content have been determined. Children with cerebral palsy had a higher percentage of cholesterol ethers and final products of lipid peroxidation in red blood cells--Shiff bases and a decrease of intraerythrocytic free magnesium. Patients with atonic-astatic syndrome were characterized by a sharp increase of Na, K-ATPase activity accompanied by increased content of such phospholipids as cardiolipin and phosphatide acid as well as Shiff bases. In patients with organic CNS lesions, Shiff bases content was similar to that in the control group, intracellular magnesium also did not differ significantly from the controls, but cardiolipin, phosphatide acid, cholesterol ethers and triglycerol concentrations were reduced. All the patients with neurological disorders had an increased percentage of phosphatidilcholin in red blood cells.

Adenosine Triphosphatases↗

[Changes of the thyroid hormone status in children with cerebral palsy and other neurological pathology].

Content of thyroid hormones (T3 and T4) and thyrotropin (TTG) hormone in blood plasma has been studied in 142 children with neurological pathology (cerebral palsy, perinatal CNS lesion). In most cases, there was a significant increase of T3 and T4 and reduction of TTG as compared to control group of healthy children. The changes of thyroid hormones content depended on the patient's age and severity of a pathological condition. A mother pregnancy course impacted on the hormones level. The content of T3 and T4 in blood plasma was higher in case of cystitis in mother's anamnesis or a persistent threat of preterm delivery. In patients, a TTG reduction correlated with mental retardation. In those with marked dysplasia of osseous tissue (osteoclast, osteopathy), the TTG content was higher comparing to patients without such malformations.

Age Factors↗

[Red cell phospholipid composition in children with neurological pathology].

Changes of red cell membrane phospholipid composition were studied in children with different neurological disorders--cerebral palsy, organic CNS damages and perinatal encephalopathy. The percentages of phosphatidylcholin and, in some cases, of phosphoglycerides increase depending on the disease type. The above changes were determined by craniocerebral innervation disturbances and concerned mainly the content of phosphatidylcholin, phosphatidylserine and phosphatidylethanolamin. The determination analysis established that the changes of erythrocytes phospholipid content correlated with clinical state severity and intellectual development of children, and to depend on the disease type and may affect directly development/disturbance of craniocerebral innervation and intellectual development. The age changes were shown to influence phosphatid acid percentage in the patients.

Brain↗

[Serological diagnosis of tuberculosis in children by using erythrocyte preparations].

The results of indirect hemagglutination with phosphatide and protein antigens in children with different manifestations of primary Tb infection point to a high diagnostic potential of the serological method. Specially designed and tested diagnostic preparations made of TB and BCG vaccine strain tuberculin can perfect the diagnosis of tuberculosis and determination of its activity. Employment of the erythrocytic diagnosticum with BCG tuberculin extends the potential of detecting postvaccinal complications in children immunized with BCG vaccine.

Adolescent↗

[Lipid peroxidation in the aorta of normotensive and spontaneously hypertensive rats with diabetes mellitus].

We have studied the effects of streptozotocin-induced (STI) diabetes on the lipid peroxidation in the aorta from normotensive (NTR) and spontaneously hypertensive (SHR) rats. In the control SHR quantity of malonyldialdehyde (MDA), conjugated dienes (CD) and arterial pressure where higher than in NTR analogous group. It has been shown that Diabetes in NTR results in significantly increased arterial pressure and quantity of MDA and CD. Under certain conditions in SHR arterial pressure and the other factors remain almost unchanged. It is likely that completely different changes in intensity of lipid peroxidation may evidence breaking adaptation mechanism in diabetic SHR.

Animals↗

[Determination of histamine and serotonin in whole blood using the method of high performance liquid chromatography].

The authors have developed a method for measuring histamine and serotonin in whole blood, based on reverse-phase high-performance liquid chromatography of 5-dimethylaminonaphthyl sulfonic (DNS) amine derivatives with fluorometric detection. Chromatography in a mini-column packed with polyamide was employed for the isolation and purification of DNS-histamine and serotonin. The lowest detectable level of histamine is 2-2.5 ng/ml of blood, that of serotonin 1-1.5 ng/ml. The method was tried with whole blood samples from children suffering from various allergic conditions. Whole blood histamine and serotonin concentration were found particularly elevated in the patients with gastrointestinal allergies.

Child↗

[The influence of sodium nitroprusside, the possible donor of nitric oxide on activity ATPases and lipid peroxidation of erythrocytes of sick children].

The effect of sodium nitroprusside, possible nitric oxide donor, on the activities of Ca2+, Mg(2+)- and Na+, K(+)-ATPases and lipid peroxidation was investigated in erythrocytes in vitro. Sodium nitroprusside caused 3-fold increase of mechanical and peroxidative erythrocyte hemolysis and also increase of bound malonic dialdehyde. Sodium nitroprusside-treated erythrocytes were also characterized by increased Na+, K(+)-ATPase activity.

Adenosine Triphosphatases↗

[Chronoinotropic reaction of the hypertrophied myocardium using an electromechanical coupling mathematical model].

Static and dynamic chrono-inotropic responses were recorded from both normal and hypertrophic rat auricular myocardium. The slope of the static force-frequency relation from hypertrophied heart was steeper than in the control hearts. The cellular mechanisms underlying changes in the force frequency response associated with hypertrophy of the heart were studied by means of a mathematical model of excitation-contraction coupling. The characteristic features of hypertrophied heart force-frequency relations are shown to be due to the enhanced volume of the intracellular Ca-stores in contrast to the total volume of the cardiomyocyte.

Animals↗

[Effect of linoleic acid in the diet on arterial pressure, ATPase activity and cyclic nucleotide level in the heart of rats with spontaneous hypertension].

A study was made of the effect of exogenous linoleic acid introduced with feed in the amount of 0.1 cal. % (group I), 9 cal. % (group II) and 16 cal. % (group III) on arterial pressure, Na, K- and Ca-ATPase activity, and on the content of cyclic nucleotides in normotensive Wistar Kyoto rats (NR) and in spontaneously hypertensive Okamoto Aoki rats (SHR). It is established that both deficiency (group I) and excess (group III) amount of linoleic acid in the diet brought about different material changes in the activity of ATPases. Nevertheless, arterial pressure rose in these animals' groups as compared to control (group II). At the same time the degree of arterial pressure rise in NR was higher than in SHR (in percent with respect to the control rats). The content of cAMP and cGMP was appreciably reduced in the animals of the 3 groups (in NR and SHR).

Adenosine Triphosphatases↗

[Effect of diets with different content of polyunsaturated fatty acids on ATPase activity in different rat tissues].

The authors studied the effect of the diets with varying content of polyunsaturated fatty acids (PUFA) on ATPase activity in the heart, kidneys and lungs of Wistar rats. During 3 weeks the rats received different diets. Group I was kept on the diet poor in PUFA, Group II on the diet rich in linoleic acid, and Group III on the diet rich in linolenic acid. The content of PUFA in food has no effect on ATPase activity in the lungs. The maximal activity of Mg-ATPase in the heart was seen in the Group III rats, while the minimal in the Group I rats (P less than 0.05). On the contrary, Na, K-ATPase activity was minimal in the Group III rats (P-0.05). Examination of ATPase activity in the kidneys has demonstrated no substantial difference between Groups II and III as regards Mg-ATPase activity, whereas Mg-ATPase activity in the Group I animals was significantly reduced (P less than 0.02). As Na, K-ATPase activity in the kidneys increased (Group II, P-0.05) excretion of Na and K with urine considerably diminished.

Animals↗