[Correlation between endemic iodine deficiency and radiation-induced thyroid cancer in children and adolescents]. / Vliianie iodnoi éndemii na razvitie radiogennogo raka shchitovidnoi zhelezy u detei i podrostkov.

A correlation between iodine excess and deficiency, on the one hand, and excessive relative risk (ERR) of thyroid cancer in children and adolescents following Chernobyl disaster, on the other, was investigated in a cohort of 119,785 patients born in 1968-1986. Thirty-four cases of thyroid cancer were registered within 12 years after the accident. Tumor-promoting effect of iodine deficiency was established. The ERR of thyroid cancer in the young patients suffering from severe iodine deficiency was almost twice as high as in healthy subjects.

[The effect of the laser irradiation of the blood on its lipid and phospholipid components in diabetes mellitus]. / Vliianie lazernogo oblucheniia krovi na ee lipidnyi i fosfolipidnyi komponenty pri sakharnom diabete.

Study results of the laser irradiation impact on the blood lipid and phospholipid components and membrane erythrocyte in patients with diabetes mellitus and pyo-necrotic injuries of lower extremities when treated by laser intravenously or epicutaneously. The results prove, that the laser irradiation of low intensity favourably affects the blood components in a complex treatment of diabetes mellitus. Intravenous irradiation positive dynamics are more easily observed.

[The frequency of chromosome aberrations in the lymphocytes of children with thyroid diseases living in Bryansk Province]. / Chastota aberratsii khromosom v limfotsitakh detei s zabolevaniiami shchitovidnoi zhelezy, prozhivaiushchikh v Brianskoi oblasti.

The number of unstable chromosome aberrations was determined in peripheral blood lymphocytes from 15 children with thyreopathology living in Klintsy (Bryansk Province); the mean age was 14 years. The number of dicentric chromosome is determined to be (0.18 +/- 0.07) per 100 cells and is significantly higher than that in cells from healthy children of Klintsy and Moscow (control). There was no differences in the frequency of other types of chromosome aberrations as well as of aberrant cells.

[The cytogenetic examination of different groups of children living in regions of Bryansk Province contaminated as a result of the Chernobyl accident]. / Tsitogeneticheskoe obsledovanie razlichnykh grupp detei, prozhivaiushchikh v raionakh Brianskoi oblasti, zagriaznennykh v rezul'tate Chernobyl'skoi avarii.

The frequency of chromosome aberrations (CA) was studied in peripheral blood lymphocytes from healthy children and children with thyreopathology living in the city of Klintsy, Bryansk Province (contamination level up to 5 Ci/km2), and two Moscow groups, respectively. We have observed the elevated number of dicentrics and acentric fragments in cell from children with thyreopathology with respect to those from healthy children living in Klintsy. This fact cannot be explained by influence of disease because there was no difference in cytogenetical markers between the groups of healthy children and children with thyreopathology from Moscow. The number of dicentrics was increased in cells from children with high level of internal contamination (more than 400 nCi) living in Krasnaya Gora (15-40 Ci/km2). It is proposed that the internal irradiation is more important for the CA induction. The symmetrical translocation analysis using the method of fluorescence in situ hybridisation (FISH) has shown the absence of this type of aberrations in cells from children with high level of internal irradiation whereas the translocations frequency in cells from control children was (1.1 +/- 0.4) per 1000 cells.

[Use of electron paramagnetic resonance in assessing viscosity of blood lipids in diabetes mellitus in children]. / Ispol'zovanie élektronnogo paramagnitnogo rezonansa v otsenke viazkosti lipidov krovi pri sakharnom diabete u detei.

Viscosity of blood serum lipids was studied in children with insulin-dependent diabetes involving nitroxyl containing probes-registered by means of radiospectrometer RE 1307. The following parameters were studied: the ratios between values exhibiting the probe distribution in polar and hydrophobic phases [formula: see text] as well as between content of low polar (I+1) and high polar (I-1) spectral components. The "f' value showed the state of lipid density and the ratio [formula: see text] allowed to estimate the lipid microviscosity. 34 children of 7-15 years old with insulin-dependent diabetes were examined in dynamics of treatment under stationary conditions. Distinct metabolic impairments and aggravation of the lipid peroxidation syndrome were mainly responsible for pronounced increase in lipid viscosity. The procedure of spin probes may contribute to study of diabetes pathogenesis as well as to serve as a diagnostic means in evaluation of the disease complications at early stages.

[Distribution of the total quantity of fatty acid double bonds in lipid components of the blood in children with diabetes mellitus]. / Raspredelenie summarnogo kolichestva dvoinykh sviazei zhirnykh kilsot v lipidnykh komponentakh krovi pri sakharnom diabete u detei.

Children suffering from insulin-dependent diabetes mellitus (IDDM) were examined for unsaturation, that is, total quantity of double bonds in individual fractions of blood serum lipids was assessed. Lipid fractions were isolated by thin-layer chromatography. Unsaturation was assessed by ozonation method. The research was aimed at elucidation of biochemical criteria of the degree of metabolic disorders in children with IDDM and at development of methods for quantitative assessment of such disorders. Thirty-two inpatients with IDDM aged 7 to 15 were examined over time. Control group included 10 healthy age-matched children. Twenty children were examined during compensation stage (group 1), twelve during decompensation with ketoacidosis (group 2). Total unsaturation parameters were found reliably decreased in children with IDDM both during compensation and decompensation stages vs. those in healthy controls. A relative decrease of unsaturated fatty acids in the fraction of unesterified fatty acids (p < 0.05) was characteristic of group 2, with the content of their fragments in triglyceride fraction being the maximal (p < 0.05). The pattern of total unsaturation distribution in serum lipid fractions may serve as an indicator for metabolic disorders and decompensation in IDDM.

[The determination of microalbuminuria by immunoenzyme analysis]. / Opredelenie mikroal'buminurii metodom immunofermentnogo analiza.

The authors have defined the optimal conditions for inhibitory type enzyme immunoassay of microalbuminuria. The range of albumin detection is 30 to 250 micrograms/ml. The optimal time of antigen binding with antibody is 45 min, the lower threshold level of albumin detection 0.6 +/- 0.02 microgram/ml. Albumin concentration is unchanged after urine storage for 8 weeks at -20 degrees C or for 1 week at 4 degrees C.

[Microcirculatory hemostasis in children with insulin-dependent diabetes mellitus]. / Mikrotsirkuliatornyi gemostaz u detei s insulinzavisimym sakharnym diabetom.

Study of microcirculatory hemostasis in children with insulin-dependent diabetes mellitus helped the authors to make new conclusions on metabolic changes underlying blood coagulation cellular factors, namely, the red cell and platelet levels. Fifty children aged 7 to 15, suffering from type I condition, were examined. Ten of these were examined during the compensation stage, 23 during decompensation without ketosis, and 17 with ketoacidosis. Twelve age-matched healthy children were controls. Noticeable disorders in the microcirculatory hemostasis system were revealed in diabetic children, these changes manifesting by changed functional activities of red cells and platelets. Reduced share of platelet deaggregation, increased red cell aggregation time, reduced thromboelastogram chronometric constant and reduction of its structural parameters may be considered as the early signs of these changes. The risk of microcirculatory hemostasis disturbances augments with the disease duration and progress.

[An evaluation of the radioprotective action of antioxidants on normal human cells and in genomic diseases by using different cytogenetic tests]. / Otsenka radiozashchitnogo deistviia antioksidantov na kletki cheloveka v norme i pri bolezniakh genoma s pomoshch'iu razlichnykh tsitogeneticheskikh testov.

In studying the radioprotective action of natural and synthesised antioxydants a decreased yield of chromosome aberrations with respect to those in untreated cells was noted in normal cells irradiated in phase G1 whereas no radioprotective effect was found in cells irradiated in G0. The addition of antioxydants into the cell cultures from patients with Turner's syndrome did not change their radiosensitivity. No adaptive response was induced in lymphocytes from patients with Down's syndrome cultivated with vitamin E.

[The indices of the lipid peroxidation and desaturation of the blood serum in diabetes mellitus in children]. / Pokazateli perekisnogo okisleniia i nenasyshchennosti lipidov syvorotki krovi pri sakharnom diabete u detei.

Comparative investigation of indices of lipid peroxidation and blood lipid unsaturation was carried out in 91 pediatric inpatients (aged 7 to 15) with type I diabetes mellitus and in 10 controls of the same age. Activation of free radical lipid peroxidation was shown to occur in children with diabetes mellitus. A degree of compensation of diabetes did not influence the level of hydroxyperoxides (HP) and final decay products (FP) of lipid peroxidation. In ketoacidotic decompensation HP and FP concentrations in the patients were increased as compared to those in the controls by 284 and 255%, respectively. At the same time children who were admitted in coma, demonstrated low values of blood lipid unsaturation. Insulin therapy (irrespective a drug dose) was accompanied by a 1.8-2-fold increase (p less than 0.05) in a HP level as compared to control values. Change in the level of lipid unsaturation depended upon a daily dose of insulin. In diabetes over 1 year different types of changes in lipid peroxidation and unsaturation were detected, and individual differences in their levels required a differentiated approach to therapeutic tactics.

[Diagnostic value of detection of blood levels of lactate, pyruvate and 2,3-diphosphoglycerate in children with diabetes mellitus]. / Diagnosticheskoe znachenie opredeleniia urovnia laktata, piruvata i 2,3-difosfoglitserata v krovi pri sakharnom diabete u detei.

Measurements were made of lactate, pyruvate and 2,3-diphosphoglycerate in 69 children admitted to the hospital in a state of diabetic ketoacidosis of different intensity. Depending on the intensity of metabolic abnormalities, the content of lactate and pyruvate was found to be increased, whereas that of 2,3-diphosphoglycerate to be lowered. Measurements of the content of lactate and the lactate/pyruvate ratio enables carrying out differential diagnosis between the ketoacidotic and lactacidotic varieties of diabetic coma.

[Study of unsaturated plasma lipids in children with diabetes mellitus]. / Issledovanie nenasyshchennosti lipidov plazmy krovi pri sakharnom diabete u detei.

The determination of unsaturation of lipids contained by the blood serum and cell plasma membranes, which depends on the total amount of double bonds (DB) in unsaturated fatty acids is a new and promising method of estimating lipid metabolism in diabetes mellitus. Unsaturation was determined by ozonization. 91 children aged 7 to 15 years were examined. The control group included 10 healthy children of the same age. The standardized values of unsaturation were delimited in the healthy children, which amounted to 260 +/- 20 conventional units. A relationship was discovered between DB and the degree of compensation together with the disease standing. Comparative analysis of blood DB and the lipid spectrum demonstrated that the high values of unsaturation correlate with elevated concentrations of free cholesterol, nonesterified fatty acids, cholesterol esters, pre-beta-LP, beta-LP and triglycerides.

[Comparative aspects of the changes in lipid metabolism indicators in lymphocyte and erythrocyte membranes in children with diabetes mellitus]. / Sravnitel'nye aspekty izmenenii pokazatelei metabolizma lipidov v membranakh limfotsitov i éritrotsitov u detei, bol'nykh sakharnym diabetom.

Lipid metabolism in lymphocytes was compared to that in the blood serum and red blood cells. 50 children aged 7 to 15 years suffering from insulin-dependent diabetes mellitus (IDDM) in the phase of decompensation without ketosis were examined. The patients were treated at hospital. 12 healthy children of the same age made up the control group. The changes in the lipid composition of red blood cells were shown to follow "passively" the changes occurring in the lipid composition of the blood serum. On the contrary, the changes in the lipid composition of lymphocyte membranes in IDDM are of "active" nature and may be caused by the displacement of the metabolic changes in lipid to a new pathological level. The changes in the lipid composition of lymphocyte membranes, seen in the phase of IDDM decompensation are one of the main factors responsible for the lowering of lymphocyte function that determines the formation of immunodeficiency followed by the superaddition of infectious diseases.

[The indices of the blood serum lipid and hormonal spectra in patients with diffuse neurodermatitis]. / Nekotorye pokazateli lipidnogo i gormonal'nogo spektrov syvorotki krovi u bol'nykh diffuznym neirodermitom.

Thirty-two female patients suffering from neurodermatitis were examined. Increased hydrocortisone level and reduced estrogen concentration in the blood serum were observed during exacerbation of the condition. During remission these parameters normalized. Exacerbations were associated with marked dyslipidemia at the expense of elevated concentrations of triglycerides, free cholesterol, low-density lipoproteins in the blood serum; these parameters also showed a tendency to normalization during remission. A correlation could be traced between hormonal imbalance and disturbances of lipid metabolism regulated by these hormones. The authors emphasize the necessity of correcting dyslipidemia during exacerbation of diffuse neurodermatitis.

[State of the neuroendocrine system in children with congenital defects of development dependent on changes in the karyotype]. / Sostoianie neiroéndokrinnoi sistemy u detei s vrozhdennymi porokami razvitiia v zavisimosti ot izmenenii kariotipa.

Forty children with multiple congenital developmental abnormalities (MCDA) without any visible changes in the karyotype and 36 MCDA children having visible changes in the karyotype were examined for the status of the neuroendocrine system. The children's age ranged from 10 days to 3 years. The children with MCDA manifested dysfunction of the neuroendocrine system, determined by the blood serum content of a number of hormones of the pituitary and the insular apparatus of the pancreas. The neuroendocrine dysfunction appeared to be in a reverse relationship to the intensity of the clinical signs (organic damage to the nervous system, delayed physical development, developmental abnormalities and minor developmental abnormalities). It manifested itself to the greatest degree in patients with numerical and structural chromosomal rearrangements and might be related to morphological or functional failure of the neuroendocrine system on the whole or of one of its components.