ВЛИЯНИЕ ЭПИДУРАЛЬНОЙ АНЕСТЕЗИИ БУПИВАКАИНОМ В ИНДУЦИРОВАННЫХ РОДАХ НА СОКРАТИТЕЛЬНУЮ АКТИВНОСТЬ МАТКИ И ФУНКЦИОНАЛЬНОЕ СОСТОЯНИЕ ПЛОДОВ САМКИ КРОЛИКА

Background: The influence of bupivacaine (0,5% — 1 ml) epidural anesthesia (EA) on 15 pregnant rabbit females induced in labor by oxytocin on the 30th day of pregnancy in chronic experiment was conducted. Materials and methods: 26 pregnant rabbit females took part in the investigation. 11 females were included in the control group and 15 — to the main group. Both groups retrospectively were divided in two on the fact of the delivery during the experiment. For each 5-minute interval the contractile activity of the myometrium (number of uterine contractions, duration and amplitude of the one uterine contraction), functional state of fetuses and female (ECG) were evaluated Registration of the parameters was carried out simultaneously with the help of electrodes which were administrated in the myometrium, to the fetuses and females on the 28th day of pregnancy. Results: It was shown that EA influence on the myometrium contractile activity and functional state of fetuses and female depends on the female delivery readiness. Conclusion: In the case of the optimal one short-term increase of the contractile activity (on the 15th minute after EA) with no significant fetal heart rate changes were observed. In the case of its absence no significant influence was revealed. Moderate female tachycardia in both groups under EA was registered more pronounced in delivery one group.Цель исследования: в хронических опытах сопоставить параметры сократительной активности матки у самок, ЭКГ у плодов и самоккролика, получавших и не получавших эпидуральную анестезию (ЭА), в индуцированных окситоцином родах при различной степени их биологической готовности к процессу. Материалы и методы: исследование проведено в хроническом опыте на 30-й день беременности на 15 беременных самках кролика контрольной и 11 самках подопытной группы. По результатам индукции родов все самки ретроспективно были разделены на группы вступивших и не вступивших в роды. Изучали влияние ЭА бупивакаином (0,5% – 1 мл) на сократительную активность матки самок, функциональное состояние самок и их плодов в индуцированных окситоцином родах при различной степени биологической готовности животных к родам. Сократительную активность миометрия оценивали по числу маточных сокращений, продолжительности и амплитуде одного маточного сокращения за каждый пятиминутный интервал. Функциональное состояние плодов и самки оценивали по изменению частоты их сердечных сокращений. Регистрацию исследуемых параметров осуществляли с помощью электродов, которые вводили в миометрий матки, в мышцы межлопаточной области плодов на 28-й день беременности. Результаты: показано, что при оптимальной готовности самок к родам после проведения ЭА отмечалось кратковременное (на 15-й мин) увеличение маточной активности, значимо не влияющее на сердечный ритм плодов. Выводы: у самок, не имевших биологической готовности к родам, проведение ЭА значимого влияния на сократительную активность матки и функциональное состояние плодов не оказывало. У вступивших в роды самок зарегистрировано более продолжительное учащение сердцебиения, чем у не вступивших в роды животных

Hydrological (in)stability in Southern Siberia during the Younger Dryas and early Holocene

Southern Siberia is currently undergoing rapid warming, inducing changes in vegetation, loss of permafrost, and impacts on the hydrodynamics of lakes and rivers. Lake sediments are key archives of environmental change and contain a record of ecosystem variability, as well as providing proxy indicators of wider environmental and climatic change. Investigating how hydrological systems have responded to past shifts in climate can provide essential context for better understanding future ecosystem changes in Siberia. Oxygen isotope ratios within lacustrine records provide fundamental information on past variability in hydrological systems. Here we present a new oxygen isotope record from diatom silica (ẟ18Odiatom) at Lake Baunt (55°11′15″N, 113°01,45″E), in the southern part of eastern Siberia, and consider how the site has responded to climate changes between the Younger Dryas and Early to Mid Holocene (ca. 12.4 to 6.2 ka cal BP). Excursions in ẟ18Odiatom are influenced by air temperature and the seasonality, quantity, and source of atmospheric precipitation. These variables are a function of the strength of the Siberian High, which controls temperature, the proportion and quantity of winter versus summer precipitation, and the relative dominance of Atlantic versus Pacific air masses. A regional comparison with other Siberian ẟ18Odiatom records, from lakes Baikal and Kotokel, suggests that ẟ18Odiatom variations in southern Siberia reflect increased continentality during the Younger Dryas, delayed Early Holocene warming in the region, and substantial climate instability between ~10.5 to ~8.2 ka cal BP. Unstable conditions during the Early Holocene thermal optimum most likely reflect localised changes from glacial melting. Taking the profiles from three very different lakes together, highlight the influence of site specific factors on the individual records, and how one site is not indicative of the region as a whole. Overall, the study documents how sensitive this important region is to both internal and external forcing

Modifying effects of 5-azacytidine on metal-containing proteins profile in guerin carcinoma with different sensitivity to cytostatics

Aim: To assess the influence of the treatment with 5-azacytidine (5-aza) on the profile of metal-containing proteins and factors of their regulation in Guerin carcinoma cells in vivo. Materials and Methods: The study was conducted on Wistar rats transplanted with wild-type Guerin carcinoma (Guerin/WT) and its strains resistant to cisplatin (Guerin/CP) or doxorubicin (Guerin/Dox). Animals were distributed in 6 groups treated with 5-aza and control animals without treatment. 5-Aza was injected by i.v. route (1 injection in 4 days at a dose of 2 mg/kg starting from the 4th day after tumor transplantation, 4 injections in total). Ferritin levels in blood serum and tumor tissue were measured by ELISA, transferrin and free iron complexes — by low-temperature EPR, miRNA-200b, -133a and -320a levels and promoter methylation — by real-time quantitative reverse transcription polymerase chain reaction. Results: The study has shown that 5-aza treatment caused demethylation of promoter regions of fth1 and tfr1 genes in all studied Guerin carcinoma strains. 5-Aza treatment resulted in a significant decrease of ferritin levels in tumor tissue (by 32.1% in Guerin/WT strain, by 29.8% in Guerin/Dox and by 69.1% in Guerin/CP). These events were accompanied by 3.5-fold and 2-fold increase of free iron complexes levels in tumor tissue of doxorubicin and cisplatin resistant strains, respectively. Also, 5-aza treatment resulted in significantly elevated levels of miR-200b, -133a, 320a expression in tumor tissue. After 5-aza treatment, ferritin levels in blood serum of animals with Guerin/Dox were increased by 23.9%, while in Guerin/Wt and Guerin/CP they were decreased by 17 and 16%, respectively. Conclusion: Alterations of epigenetic regulation upon in vivo treatment with 5-aza change the levels of metal-containing proteins due to DNA demethylation and altered miRNA expression profiles in Guerin carcinoma cells

Oxygen isotope composition of diatoms from sediments of Lake Kotokel (Buryatia).

This is a summary of new oxygen isotope data for diatoms from Lake Kotokel sediments, with implications for responses of the lake system and its environment to global change over the past 46 kyr. Fossil diatoms in all samples are free from visible contamination signatures and contain no more than 2.5% Al2O3, which ensures reliable reconstructions. The δ18O values in diatoms vary between +23.7 and +31.2‰ over the record. The results mainly represent diatom assemblages of summer blooming periods, except for the time span between 36 and 32 kyr, when the isotopic signal rather records a shift from summer to spring blooming conditions. Possible water temperature changes only partly explain the changes in the isotopic record. The observed isotopic patterns are produced mainly by isotope changes in lake water in response to variations in air temperature, hydrology, and atmospheric circulation in the region. During Marine Isotope Stage (MIS) 2 (Last Glacial maximum), high δ18Odiatom resulted from rapid evaporation and low fluvial inputs. The high δ18O values of about +29 to +30‰ during the first half of MIS 1 (Holocene interglacial) suggest an increased share of summer rainfalls associated with southern/southeastern air transport. The δ18O decrease to +24‰ during the second half of MIS 1 is due to the overall hemispheric cooling and increased moisture supply to the area by the Atlantic transport. The record of Lake Kotokel sediments provides an example of complex interplay among several climatic controls of δ18Odiatom in the Late Pleistocene and the Holocene

Taxation features in the context of economic sectors of the constituent entity of the Russian Federation

The features of modern taxation in the context of economic sectors are considered on the example of a specific region of Russia. The structure of tax revenues, gross regional product, as well as our own calculations of the actual tax burden in the context of economic activities of the Chuvash Republic are studied. It is revealed that in the studied region, such types of economic sectors as manufacturing, construction, and extraction of minerals bear a high tax burden, and in the republic as a whole, the tax burden is unevenly distributed across economic sectors due to the current structure of the region's economy. At the same time, the peculiarities of taxation of agriculture contributed to the fact that this industry provided only 0.4% of all received tax payments in Chuvashia. The agricultural sector bears a minimal tax burden. It is concluded that in current taxation conditions, organizations and entrepreneurs of the agricultural sector find it economically feasible to calculate and plan their tax burden

Influence of TG5 and LEP gene polymorphism on quantitative and qualitative meat composition in beef calves

The authors investigated the influence of TG5 and LEP gene polymorphism on quantitative and qualitative meat composition of 20 month old bull calves of the Hereford (n=38) and Limousine (n=26) breeds, which were bred in the climate of Cis-Ural steppe zone from 2013 to 2015. The Hereford calves were the offspring of the cattle from the southeastern states of Australia and Tasmania (3rd descent of the main lines: Baz-Gol-Sol 2U 6827, Domino 325676, Ardmors-Domino 56, Silverlend 31432); the Limousine calves were the descendants of the offspring resulting from the accumulation cross breeding of Simmental cattle with the French Reproductive Recognized bulls (4th descent of the Reper 433 and other lines). The analysis of TG5 genotype frequency in the examined populations reveals that the animals have significant (P<0.01 or P<0.05) potential for increased taste and nutritional qualities of beef associated with a high proportion of desirable TT genotype, probably related to the foreign origin of the cattle. There were no carriers of the BB genotype of LEP genes in the examined populations. Significant (P<0.01 or P<0.05) dependence between the studied SNP in TG5 and the rates of total body fat, the proportion of adipose tissue in the morphological carcass composition (or meat composition), and the content of intramuscular fat in the longissimus, as well as the correlation between the studied SNP in LEP and the rates of raw visceral fat, and fat outcome, were established. LEP polymorphism was significantly (P<0.01 or P<0.05) associated with the proportion of adipose tissue in the morphological carcass composition in Hereford calves, and with the content of intramuscular fat in the longissimus in Limousine calves. The results of our study of TG5 and LEP polymorphism demonstrate considerable genetic potential of the given populations of the Hereford and Limousine breeds in relation to the quantitative and qualitative composition of their meat; they are to be used in improvement of genetic potential of meat cattle in the Cis-Ural steppe zone

Improving the diagnosis and treatment of hepatobiliary pathology in adolescents with obesity

Background. The prevalence of obesity among adolescents is increasing, and hepatobiliary pathology is often associated with it. Timely diagnosis and treatment of liver pathology, including non-alcoholic fatty liver disease, and biliary pathology prevent the development of severe complications of obesity. The purpose of the study is to evaluate the structural and functional state of the hepatobiliary system using dynamic echography and to optimize treatment of hepatobiliary disorders among adolescents with obesity. Materials and methods. The study involved 27 patients with obesity aged 12–17 years. A clinical, laboratory and instrumental examination were conducted, which included dynamic echography using Chophytol. The therapeutic possibilities of Chophytol were studied. Results. The study shown that increased appetite, abdominal pain and nausea were leading complains among adolescents with obesity. Signs of moderate atherogenic dyslipidemia were found during the biochemical analysis. Signs of steatohepatosis were observed in 88.8 % of patients according to echography data. Hypokinesis of the gallbladder was detected in 92.6 % of cases. In the majority of patients, there was a hypotonic-hypokinetic type of functional disorders of the biliary tract, an increase in the size of the gallbladder. Comprehensive treatment with Chophytol for 1 month has resulted in positive effects: general well-being has improved, dyspepsia and pain syndrome have decreased; in 52.0 % of patients, the size of the liver has decreased, in 32.0 % — the normalization of echogenicity of the liver parenchyma has occurred; in 28.0 % of adolescents, the contractile function of the gallbladder has improved. Conclusions. In the majority of adolescents with obesity, signs of steatohepatosis and hypotonic-hypokinetic type of functional disorders of the biliary tract are determined. Dynamic echography using Chophytol allows evaluating the function of both the gallbladder and the sphincter apparatus. The application of Chophytol in the comprehensive therapy among obese adolescents with signs of steatohepatosis and with hypokinetic type of functional disorders of the biliary tract is well-founded