[Buccal micronucleus cytome assay in complex genetic-hygienic study of preschool children].

There are presented results of the cytome analysis of epithelium of buccal mucosa in 167 children aged of 5-7 years, permanently residing in the city of Magnitogorsk and visiting municipal kindergartens. Frequencies of the main indices of genotoxic and toxic effects were: cells with micronuclei - 0.29±0.04 %, with protrusions ofnuclei - 1.47±0.17 %, with double nuclei -1.96±0.13 %, with two nuclei - 3,28±0,16 %, with perinuclear vacuole - 9.66±0.86 %, with pycnosis of nucleus - 4.60±0.31 per 1000 cells, with karyorrhexis - 0.86±0.15per 1000 cells, with lysis of nucleus - 54.34±3.90 per 1000 cells, the condensed chromatin cells - 10.59±1.35 per 1000 cells. Most of these indices didn't differ from the same detected earlier in buccal epithelial cells from children of the same age in Moscow, except cells with perinuclear vacuole, which frequency in Moscow cohort was twice higher. Frequencies of cells with these anomalies were associated with the content of 19 out of 326 revealed components of contamination of the total-winter snow samples, taken on the territories of the kindergartens, which were visited by examined children. There was shown lack of differences from basic values of main indices previously establishedfor the children of the same age in Moscow, with the exception of cells with perinuclear vacuole, the rate of which in Moscow was twice higher. There were revealed confounding factors associated with test indices: gender of the child, the annual number of acute respiratory diseases, health group, income per one person in family, alcohol intake by parents.

[Instability and sensitivity of the genome of healthy children in Magnitogorsk].

Problem of the influence of factors of the industrial city on the hereditary apparatus of its residents has not been fully resolved, because of traditionally in such studies only the pollution of environment components is taken into account. However the existence of a set of contributing socialfactors that modify the genotoxic effects ofpollution, requires the creation of a new methodology for genetic and toxicological studies. For this purpose, in Magnitogorsk, where one of Russia's largest steel plants is located, we conducted a comprehensive survey, whose tasks included the analysis of the influence of the complex of exogenous and endogenous factors on the genome of children. In this publication there are presented the results of the fifth fragment of this work - the analysis of instability and individual sensitivity of the genome of 166 children of 5-7 years, residing in two districts of Magnitogorsk: around the steel plant and on the opposite bank of Ural river, where there are no large-scale industrial enterprises. The study was conducted in the micronucleus test on peripheral blood lymphocytes cultured with cytochalasin B. For assessment of individual sensitivity of genome blood cultures were exposed to standard N-methyl-N-nitro-N-nitrosoguanidine (MNNG) mutagen. Cytogenetic analysis was performed in binucleated cells accordingly to international protocol, as well as with the use of an extended protocol including 32 indices. Average group frequency of binuclear cells with micronuclei (0.5-0.7%) were found not differ from the levels defined in children residing in Europe, and not differ between areas of the town. However the extended protocol of cytogenetic analysis discovered that the real frequency of dividing cells with lesions in blood cultures of children was 1,49-1,66%. Higher spontaneous proliferative activity of the cells and the frequency of dividing cells with injuries were found in blood cultures of children residing in settlements around the Magnitogorsk steel plant, while the individual sensitivity of the genome in these children was lower than that of their peers from the opposite bank of the Ural river A similar conclusion, but already in relation to the state of the systems for adaptation of entire body has been made from results of other fragments of the study, published earlier.

[Factors of anxiety and autonomic tonus in senior preschool children from Magnitogorsk].

In the paper there are presented the results of a study of anxiety and balance ofparts of autonomous nervous system in healthy children 5-7 years old, residing in different parts of Magnitogorsk. It is shown that state of heightened and high alert was shown to be more common among children living on the left bank of the Urals river around the Magnitogorsk Metallurgical Integrated Plant. In these children an imbalance in the work of the parts of the autonomic nervous system was detected more frequently, at that shifts were observed mainly in the direction to ergotropic tone. At the same time balanced work of the parts of the autonomic nervous system was observed more frequently in children living on the right bank of the Urals river. Discovered psychosomatic features of examined children turned out to be associated with both the social characteristics of family lifestyle and the emotional stress of parents, and the contents of some organic compounds in total snow samples collected in the territories of kindergartens which they attended. One ofthe most significant results ofthe work we consider the detection of a correlation relationship between emotional stress of parents and activity of key enzymes in their children, reflecting the protective and adaptive reactions of the organism. On the basis of these and previously obtained data, we suggest that social and psychological factors of the family are not only a potential source of maladaptation of the child, but, probably, can have an impact on the stability and sensitivity of the genome of children.

[Detection of potentially carcinogenic compounds persisting in atmospheric air and having high priority for hygienic regulation].

The algorithm for the choice of potentially carcinogenic compounds (PCS) among emitted into air and results of the study, undertaken for realization of this algorithm are presented. The investigation was carried out in Magnitogorsk - Russian town of black metallurgy - in frames of the other study, aimed to evaluation of the influence of atmospheric pollution on children's health and genomic instability. The 11 PCS for further profound study of biological activity were selected out of more than 300 PCS, persisting in the air. The carcinogenic activity for 6 compounds out of these 11 ones was already have been found out before, that testifies correctness of the created approach and its adequacy for detection PCS in atmospheric air.

[Characteristics of quantitative values of regional factors of exposure in the studied areas].

In the paper the results of a comparative evaluation of the Russian and the standard, recommended by US EPA, factors of population exposure in seven areas of different federal districts of Russia are presented. Concerning the adult population differences reach 3.5 times, for children (1-6 years) - 4.2 times. An example of the effect of regional differences and standard factors on levels of exposure and risk is considered. Promising areas for further research on regional factors to improve the accuracy and reliability of the forecast assessments of the risks to public health have been identified.

[Morbidity among senior preschool children in Magnitogorsk].

The publication is the third fragment of the multiparameter study. The level and causes of genome instability and sensitivity are assessed in children living in Magnitogorsk, a city with one of the largest mills in Russia. The city is in the list of the world's 35 most polluted ones. A transverse retrospective analysis found no differences in primary morbidity among 5-7-year-old children who had been living in different districts of Magnitogorsk since birth and were going to municipal kindergartens located adjacent to their house. Contrary to the expectations, the prevalence of morbidity and diseases that were markers for an industrial town was significantly lower among the children residing in the settlements situated around the mills than that in the city's other districts. There were 9 organic compounds that had no hygienic standards, the content of which in the snow samples collected in the areas of the examined kindergartens correlated with the prevalence of the children's morbidity. Family social and living conditions were shown to affect the children's morbidity.

[Taking into account the emotional tension of adults and children in the evaluation of the influence of environmental factors on genomic instability and sensitivity: results and prospects].

The paper summarizes the results of 8 genetic and psychological examinations in adults and children, which are aimed at evaluating the genotoxic effects of environmental factors on cultured lymphocytes. Human emotional tension was proved to be directly related to the level of genome damage, to genomic sensitivity to in vitro exposures, and to lymphocyte proliferative activity and to be inversely related to the level of apoptosis. There was an association of the degree of anxiety in children with their morbidity. High emotional tension in adult family members was found to negatively affect the degree of anxiety and the level of genomic instability in a child.

[Hygienic evaluation of the total mutagenic activity of snow samples from Magnitogorsk].

The paper gives the results of 4-year monitoring of the total mutagenic activity of snow samples from different Magnitogork areas in a test for induction of dominant lethal mutations (DLM) in the gametes of Drosophila melanogaster. An association was first found between the rate of DLM and the content of some chemical compounds in the ambient air and snow samples; moreover all the substances present in the samples, which had found genotoxic effects, showed a positive correlation with the rate of DLM. Furthermore, direct correlations were first established between the rate of DLM and the air pollution index and morbidity rates in 5-7-year-old children residing in the areas under study. The findings allow the test for induction of dominant lethal mutations (DLM) in the gametes of Drosophila melanogaster to be recommended due to its unique informative and prognostic value for monitoring ambient air pollution and for extensive use in the risk assessment system.

[The ultrasonic diagnosis of textilomas]. / Ul'trazvukovaia diagnostika tekstil'nykh inorodnykh tel.

The article analyses ultrasonic symptomatology of textile foreign bodies which were left in the abdominal cavity and retroperitoneal space during surgical interventions in 10 cases. An intensive distal acoustic shadow behind a space-occupying echogenic structure in the main sign of a foreign body. Two variants of the echotomographic picture are distinguished. It is shown that the picture depends on the degree of the exudative reaction. The authors claim ultrasonic examination to be an effective method for detecting foreign bodies and determining their exact localization.

[Ultrasonic study of the bile ducts in patients after cholecystectomy]. / Ul'trazvukovoe issledovanie zhelchnykh putei u bol'nykh, perenesshikh kholetsistéktomiiu.

Ultrasonic examination (USE) of the bile tract was conducted in 287 patients with removed gallbladder. The choleretic test based on comparative appraisal of the lumen of the bile ducts before and after medication with pharmacological agents stimulating bile secretion was performed in 167 cases to increase the USE efficacy. USE allowed choledocholithiasis to be diagnosed in 24 of 30 patients and obstruction of the bile ducts in 60 of 67 patients. The sensitivity of USE in pneumobilia detection was appraised highly. Preference was given to radiological methods of examination of patients with external biliary fistulae and drains in the common biliary duct in comparison with USE. The authors believe USE to be the optimal means for primary diagnosis of biliary pathology in persons with removed gallbladder, which can be undertaken in out-patient conditions and which reduces the need for conducting invasive radio-endoscopic examination (endoscopic retrograde cholangiography) in such patients.

[Ultrasonography in the diagnosis of colonic obstruction].

The authors of the present paper outline the results of studying the use of routine transabdominal sonography and ultrasound irrigoscopy (UI) in the diagnosis of acute colonic obstruction (ACO) in 70 patients. The cause of ACO was tumor-induced colonic luminal obturation in 55 patients and colonic evacuatory dysfunction due to congenital anomalies and acquired constrictions of inflammatory genesis in 15 cases. UI was used to determine the presence, degree, and causes of colonic obstruction. The paper details the UI procedure developed by the authors and the ultrasound semiotics of ACO, shown by routine transabdominal sonography and UI. Analysis of the results of the studies allows the authors to state that UI is as highly informative as X-ray irrigoscopy in the diagnosis of ACO and may be included into a diagnostic algorithm in these patients.

[Capacities of ultrasound study in the diagnosis of diffuse gastric carcinoma].

By using 237 verified cases of diffuse carcinoma and benign diseases of the stomach as an example, the authors assess the capacities of routine transabdominal ultrasound study (USS) of the stomach in the diagnosis of tumors and present their modification of the procedure facilitating the imaging of problem areas. In the authors' opinion, the symptoms of thickening of the wall of the stomach and abnormalities in its normal five-layered structure indicate diffuse gastric carcinoma. The authors consider USS to be a supplement to the basic diagnostic techniques--X-ray study and gastroscopy.

[X-ray and ultrasonic diagnosis of noninflammatory benign diseases of the gallbladder]. / Rentgenologicheskaia i ul'trazvukovaia diagnostika nevospalitel'nykh dobrokachestvennykh zabolevanii zhelchnogo puzyria.

The author analyzes the results of x-ray (cholecystography) and ultrasonic examinations carried out in patients with noninflammatory benign diseases of the gallbladder (71 with cholesterosis and 28 with adenomyomatosis). X-ray and ultrasonic symptoms of these conditions are presented and the diagnostic potentialities of both methods in the detection of such diseases assessed. The author considers ultrasonic scanning the method of choice for the diagnosis of any forms of gallbladder cholesterosis, whereas an x-ray examination appears to be informative only in a polypous form of the disease. X-ray contrast examination is preferable for the recognition of gallbladder adenomyomatosis, for it presents a clear-cut pattern characteristic of each form of this condition, whereas ultrasonic symptoms of such involvement are nonspecific.

[Possibilities of ultrasonography in the differential diagnosis of strangulation and obturation forms of commissural small intestine ileus]. / Vozmozhnosti sonografii v differentsial'noi diagnostike stranguliatsionnoi i obturatsionnoi form spaechnoi tonkokishechnoi neprokhodimosti.

The main aim of this paper, by the authors' intention, was to attempt to study and provide evidence for that routine transabdominal sonography has great capacities in diagnosing small intestinal strangulation and obstruction ileus caused by commissures or tumors. The data of 48 cases of small intestinal ileus (27 of its strangulation form and 21 of its obturation one) were analyzed. The paper details guidelines on ultrasonographic techniques and the ultrasound semiotics of this pathology. It is the first time that the authors give individual methodological and semiotic approaches at sonography in this group of papers. They present a particularly clinical picture in combination with ultrasonographic data by providing their constant comparison, which serves as an additional support of the results of this paper. In the authors' opinion, the findings suggest that transabdominal sonography may be a successful basic diagnostic technique for strangulation and obturation forms of small intestinal ileus.

[A role and a place of ultrasound diagnosis of acute ileus]. / Rol' i mesto ul'trazvukovoi diagnostiki ostroi kishechnoi neprokhodimosti.

The main purpose of the authors is to present their view of a place of present-day ultrasonography in the diagnosis of acute small and large intestinal obstruction. A comparatively sizable material covering 218 verified cases of acute ileus, including 77 patients with large intestinal obstruction and 141 patients with impaired passage of the intestinal contents along the small bowel was used to outline the aspects of ultrasound techniques and the symptomatology of ileus, by differentiating its some types. Along with the general assessment of the methodological and semiotic aspects of ultrasound diagnosis of acute uleus, the authors emphasizes a role of sonography in the detection of large intestinal obstruction by outlining their modified procedure of ultrasound irrigoscopy. For greater objectivization of their positive assessment of the place of ultrasound in the diagnosis of acute ileus and large intestinal obstruction, the authors comparatively studied X-ray and ultrasound studies to reveal this pathology. In addition to their purely personal assessment of a role of ultrasound in the diagnosis of large intestinal obstruction, the lecture also shows its authors' opinion as to the organizational issues associated with the necessity of correcting the existing diagnostic algorithm to detect large intestinal obstruction.

[Ultrasonography and computed tomography in the detection of overlooked gauze surgical dressings]. / Ul'trazvukovoe issledovanie i komp'iuternaia tomografiia v obnaruzhenii "zabytykh" marlevykh khirurgicheskikh materialov.

USI and CT were performed in 14 patients with textile foreign bodies left in the abdominal cavity and retroperitoneal space during operation on the biliary tracts (6 cases), kidneys (4 cases), pancreas (2), stomach (1), and during appendectomy (1). A decisive sign in USI that enabled one to detect gauze foreign bodies, was a stable echogenic zone corresponding to a proximal body contour with a solid acoustic shadow behind. Extra-organic localization of these changes contributed to making diagnosis. A certain amount of fluid could be seen around a foreign body during an exudative reaction. In CT, diagnosis was based on the detection of a formation with a capsule containing calcinates and air masses.

[Role of ultrasound study in present-day diagnosis of gastric endophytic carcinoma]. / Rol' ul'trazvukovogo issledovaniia v sovremennoi diagnostike éndofitnogo raka zheludka.

From the current concept of an obvious predominance of intramurally growing carcinomas of the stomach over its all other anatomic forms, the authors attempted to evaluate whether they could be diagnosed by ultrasonography. The ultrasound symptomatology characteristic of the carcinomas was described on the basis of 105 verified gastric endophytic carcinomas, by using the known special ultrasound procedures methodologically modified by the authors. Its cardinal features were as follows: the trickened wall at the site of tumor infiltration and impairment of its normal five-layer structure. The whole cycle of investigations was conducted in the comparative context: classical X-ray ("tight filling", double contrasting), endoscopy via sampling of 6-7 biopsy specimens and gastric ultrasound study made by a special procedure. Using classical X-ray and endoscopy as two basic diagnostic techniques, the authors have, nevertheless, concluded that under certain situations, the modified gastric ultrasound study may yield some information which may be useful in establishing a final diagnosis of a gastric intramural growing tumor.