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Structure of the Institute Scientific activity History of the Institute New cryptogamic records. 11 Index page Scientific activity Periodic publications Novitates Systematicae Plantarum non Vascularium Volume 57, Part 1, 2023 New cryptogamic records. 11 V. M. Kotkova, I. V. Czernyadjeva, E. A. Davydov, G. Ya. Doroshina, D. Yu. Efimov, L. A. Efimova, I. V. Frolov, Ya. I. Gabiger, M. Yu. Glushсhenko, I. A. Gorbunova, D. E. Himelbrant, M. E. Ignatenko, L. B. Kalinina, L. E. Kurbatova, H. V. Kushnevskaya, N. N. Lashchinsky, K. Yu. Lotiev, E. L. Moroz, A. A. Notov, Yu. K. Novozhilov, Yu. S. Otmakhov, N. V. Plikina, N. N. Popova, A. D. Potemkin, V. A. Putilina, P. Yu. Ryzhkova, Ch. N. Sambyla, E. V. Smirnova, I. S. Stepanchikova, Yu. V. Storozhenko, E. I. Troeva, A. G. Tsurykau, V. S. Vishnyakov, A. V. Vlasenko, V. A. Vlasenko, E. A. Volkova, L. F. Volosnova, L. S. Yakovchenko, T. N. Yatsenko-Stepanova, K. A. Zhuykov, A. S. Zueva DOI: https://doi.org/10.31111/nsnr/2023.57.1.155 Full article Abstract First records of algae for the Orenburg Region and Urals of Russia, for the Republic of Belarus and Georgia, fungi for St. Petersburg, Kemerovo and Novosibirsk regions, republics of Altai and Tuva, Altai, Krasnoyarsk and Trans-Baikal territories, myxomycetes for the Omsk and Tomsk regions, republics of Tuva and Sakha (Yakutia) of Russia and Republic of Belarus, lichens, lichenicolous and allied fungi for the Omsk, Ryazan, Sakhalin and Tver regions, Altai, Khabarovsk and Primorye territories, mosses for St. Petersburg, the Leningrad, Saratov and Tula regions, Stavropol Territory, and New Siberian Islands Archipelago, liverwort for St. Petersburg and Krasnoyarsk Territory are presented. The data on their localities, habitats, distribution are provided. The specimens are kept in the herbaria of the Altai State University (ALTB), the Papanin Institute for Biology of Inland Waters of the Russian Academy of Sciences (IBIW), the Komarov Botanical Institute RAS (LE), the Mire Research Group of the Papanin Institute for Biology of Inland Waters of the Russian Academy of Sciences (MIRE), the V. F. Kuprevich Institute of Experimental Botany of the National Academy of Sciences of Belarus (MSK), the Central Siberian botanical garden SB RAS (NSK), the «Galichya Gora» Nature Reserve (VU), the Georgian National Herbarium at the Institute of Botany of the Ilia State University (TBI), and algological collection in the laboratory of the Algology Group of the Institute for Cellular and Intracellular Symbiosis of the Ural Branch of the Russian Academy of Sciences. Barcodes ITS1-5.8S-ITS2 fungal nrDNA region of some specimens have been deposited in the GenBank NCBI

Gastrointestinal disorders are important place among the visceral manifestations of systemic autoimmune and immunoinflammatory rheumatic diseases (RD). Pathology of the esophagus, stomach, small and large intestine can vary from moderate functional disorders to the development of severe chronic inflammation with metaplasia and dysplasia of the mucous membrane, the formation of multiple erosions, hemorrhages and deep ulcers. Complications of gastrointestinal pathology in RD, such as bleeding, perforations and strictures, can cause death. This review examines the main clinical manifestations, possibilities of diagnosis and treatment of gastrointestinal lesions in systemic scleroderma, idiopathic inflammatory myopathies, systemic vasculitis, Sjogren’s syndrome and disease, as well as systemic lupus erythematosus.

Aim. To improve outcomes of treatment for neoplasms in segments VII-VIII of the liver adjacent to the main stem of the right hepatic vein and/or to its forming large branches.Materials and methods. In the period of 2016–2022, the resection of segments VII and/or VIII of the liver and the right hepatic vein, as well as its forming branches without reconstruction was performed in 24 patients. Surgical indications were liver metastases of colorectal cancer in 15 cases, hepatocellular cancer (cholangiocarcinoma) in six cases, angiomyolipoma in one case, uterine cancer metastases in one case and primary retroperitoneal tumor metastases in one case. Minor liver resections were additionally performed in 11 cases. Results. There were no intraoperative signs of impaired venous drainage. After surgery bile in the drains was detected in three patients, and a biliary fistula was formed in one case. No other complications were identified. No fatalities were registered after surgery. The late postoperative period revealed no specific complications related to a disturbance of venous drainage through the right hepatic vein.Conclusion. Existing and emerging collaterals can provide adequate venous drainage to the middle hepatic vein, short hepatic veins after resection of liver segments VII and VIII with resection of the right hepatic vein stem and its forming branches without reconstruction, even if the lower right hepatic vein is missing, and without complete obstruction of the right hepatic vein before surgery.

Introduction. Fibrolamellar hepatocellular carcinoma (FlC) is a rare subtype of hepatocellular carcinoma (HCC). Drug antitumor treatment of FlC has not been studied sufficiently due to the rarity of the pathology and requires further research to choose an effective treatment.Aim. The choice of effective drug antitumor treatment in patients with fibrolamellar liver carcinoma.Materials and methods. The retrospective study included 31 patients with FlC who received drug antitumor therapy at the N.N. Blokhin National Research Center of Oncology of the Ministry of Health of the Russian Federation in the period from 2005 to 2020. The patients were divided into comparison groups: “targeted therapy” (mainly sorafenib), “chemotherapy” (mainly gemcitabine + cisplatin). A comparative intergroup analysis of the effectiveness of drug antitumor treatment in the 1st and 2nd lines of therapy was carried out. Adjuvant chemotherapy was evaluated for time without progression. The correlation of the number of treatment lines in the anamnesis with the prognosis of the disease was also evaluated.Results. Analysis of the effect of adjuvant therapy on relapse-free survival did not prove significant differences between the comparison groups (p = 0.112; log-rank test). Therapy with multikinase inhibitors (mainly sorafenib) allows to achieve a better time without progression compared to chemotherapy (mainly gemcitabine + cisplatin / oxaliplatin) (p = 0.000; log-rank test) in patients in the 1st line of FlC treatment. OS did not significantly differ between the groups (p = 0.417; log-rank test). In line 2, time without progression in patients receiving targeted therapy (p = 0.042; log-rank test) is higher compared to patients receiving chemotherapy in line 2. A longer duration of OV was recorded in the groups of patients who underwent 2 lines of drug antitumor treatment and in the group of 3 or more lines compared with the use of only 1st line of treatment (p = 0.024) and (p = 0.003), respectively.Conclusion. The results of the work demonstrate an advantage in the appointment of targeted therapy as the 1st and 2nd lines of drug antitumor treatment, while the appointment of chemotherapy remains a less prognostically favorable option. Adjuvant therapy administration did not demonstrate a statistically significant difference in relapse-free survival.

The article deals with the problem of vulnerability of population groups in a state of social transmission on the example of two basic age groups — youth and the elderly. Social transmission is considered as a phenomenon caused by the transitivity of social status and psychophysiological state (from youth to maturity and from maturity to old age). These periods of transmission can be associated with a state of uncertainty, increased tension, irritation, frustration, uncertainty of prospects, fear of making a mistake in choosing a behavior strategy and a number of other states determined by the search for a rational choice that determines a new social status. At the same time, the authors note that, despite the presence of a certain age specificity, youth and the elderly are characterized by a general vulnerability to social risks arising in this condition. Risks arising in a state of social transmission can be considered a factor that has a direct impact on the individual’s place in society self-perception, and lead to irreversible results in the absence of successful overcome. The theoretical assumptions presented in the article are confirmed by the results of a pilot empirical research, which showed that both young people and elderly people express serious concerns about the state of social transition, and note a significant number of associated social risks, due to both inevitable age-related changes and the need to choose a further life path in changing social status conditions. In conclusion the authors underline that social transmission is of great importance in the context of social problems overcoming in youth and the elderly, and propose a new vista in Russia’s sustainable development optimization.

Complete liver and bile ducts resection with negative margins (R0) in the only possible radical treatment of Klatskin tumor. Even after R0 resection, the recurrence rate is as high as 50–76 %. Neoadjuvant endobiliary photodynamic therapy (PDT) may potentially improve their results and long­term survival. The authors present their own first experience of endobiliary PDT performing before liver and bile ducts resection (R0) in Klatskin tumor patient.

Abstract The article deals with the issues of the geodynamic evolution of the Kara–Barents Sea shelf and influence of structure-forming processes on the nature of relief formation. The aggregate data obtained allows us to assume that the relief of the western part of the Russian Arctic formed as a result of polycyclic processes of closing of the Proto-Atlantic, Paleoural, and Iapetus oceans. A systematic analysis of paleogeodynamic reconstructions of the evolution of the continental crust of the Arctic region makes it possible to identify with a high degree of reliability the spatiotemporal patterns of relief formation, predict areas of localization of hazardous phenomena on the seafloor, and substantiate geomorphological criteria for searching for hydrocarbon deposits in shallow bedding.

First records of cyanoprokaryotic species for the Russian part of the Gulf of Finland of the Baltic Sea, aphyllophoroid fungi for the Yaroslavl Region, myxomycetes for the Republic of Belarus, lichens and allied fungi for the Tver Region, lichens for the Nizhny Novgorod Region, Kabardino-Balkarian and Karachayevo-Circassian republics, and Perm Territory, mosses for the Kursk, Lipetsk and Saratov regions are presented. The data on their localities, habitats, distribution are provided. The specimens are kept in the herbaria of the Komarov Botanical Institute RAS (LE), Department of Botany of St. Petersburg State University (LECB), Kuprevich Institute of Experimental Botany NAS of Belarus (MSK-F), Francisk Skorina Gomel State University of Belarus (GSU), National Research Lobachevsky State University of Nizhny Novgorod (NNSU), Galichya Gora Reserve of the Voronezh State University (VU).

We present a rare clinical case of a 37-year-old man who had intrahepatic splenosis (IHS) mimics hepatocellular carcinoma on CT/MRI imaging. The patient with a history of splenectomy 14 years ago had no specific complains and the lesion was found incidentally during follow up imaging for the chronic pancreatitis. Definitive diagnosis of IHS was possible with post-operative histopathological analysis of the resected liver.

First records of silica-scaled chrysophyte alga for the Leningrad Region and North-West of European Russia, fungi for the Pskov and Novosibirsk regions, and the Republic of Tuva, myxomycetes for the Republic of Belarus, lichens for the Yamal-Nenets Autonomous Area and West Siberia, liverworts for the Kurgan Region, mosses for the Republic of North Ossetia – Alania, the Taimyr Peninsula, the Chukotka Autonomous Area, and the Kamchatka Territory from the North Koryakia are presented. The data on their localities, habitats, distribution, and specimens are provided. The specimens are kept in the Herbarium of the Komarov Botanical Institute RAS (LE), the Herbarium of M. G. Popov at the Central Siberian Botanical Garden RAS (NSK), or the Herbarium of the Kuprevich Institute of Experimental Botany NAS of Belarus (MSK-F).

A summary seismostratigraphic description of the Nansen Basin sedimentary cover was compiled using data from the Norwegian sector of the Eurasian Basin and data interpretation from the Russian Arktika-2011 project. It was found that sea level fluctuations had a significant impact on sedimentation processes in the Arctic basin. Erosion processes on the shelf and slope were developed during regression phases. In the deep-water part, these processes were accompanied by the formation of fan systems, contourites, and slump bodies in both Neogene–Quaternary and older seismic sequences in the Nansen Basin. They are confined to the modern outer fan distinguished in the bottom topography in both young and older seismic sequences. The sedimentary infill was transported through the Franz Victoria and St. Anna troughs, which already existed at the beginning of the Eurasian Basin opening. The distal parts of the fans form extended sedimentary bodies in the basin with a loss of coherence and acoustic blanking of the seismic record. The contourites are distinguished in all sections near the continental foothill, and slump bodies occur on the slope near the shelf edge. Miocene–Pliocene sequences contain gravity flow sediments located more than 100 km away from the modern fan boundary. The sedimentary infill of the Nansen Basin was regulated both by the intensity of sediment influx and by changes in the hydrological regime of the basin associated with the periods of its isolation from the World Ocean and transition to a single water circulation system. The accumulation of contourite sediments began in the Miocene. They are developed near continental foothills together with fan lobes, and it is not possible to separate these sedimentary body types. The sharpest sea level fall at the Pliocene–Quaternary boundary resulted in the intense sediment input and the formation of spacious zones of coherence loss in the distal fan parts of the basin. The occurrence and spatial distribution of contourite and gravity flow deposits in the basin correlate with sea level fluctuations in antiphase with intense erosion on the Barents Sea shelf, which also depend on vertical movements in the basin surrounding (Svalbard and Franz-Joseph Land archipelagos). Seismic profiles without superimposed interpretation are given in the electronic supplementary materials.

Summary. Purpose. It consists in the study of the main indicators of the activity of the emergency medical care system in 2020 based on the results of reports from the centers of emergency medical care and medicine of disasters in the regions in comparison with 2019. Study of positive experience and ways to optimize the organizational and staff structure of emergency medical care, which will allow the most effective use of forces and resources in the process of performing tasks as intended. Materials and methods. In the course of researching the reports of the centers of emergency medical care, the following research methods were used: analytical, systematic approach. The regulatory legal acts regulating the activities of emergency medical care were used. Results. A detailed analysis of the reports of the centers of emergency medical care in 2020 was carried out, the factors of positive and negative impact on the results of activities were identified. Conclusions. In general, the emergency medical care system copes with the tasks set to perform the tasks as prescribed, but there are a number of problematic issues that negatively affect its activities.

First records of trebouxiophycean alga and fungi for the Leningrad Region, myxomycetes for the Republic of Belarus, lichens, saprobic and lichenicolous fungi for European Russia, the Nenets Autonomous Area, the Kostroma and Tver regions, the republics of Altai and Tuva, Altai and Primorye territories, bryophytes for the Orel and Ryazan regions, the arctic part of the Republic of Sakha (Yakutia), the North Koryakia are presented. The data on their localities, habitats, distribution, and specimens are provided.

Liver cancers are among the deadliest malignancies due to a limited efficacy of early diagnostics, the lack of appropriate biomarkers and insufficient discrimination of different types of tumors by classic and molecular methods. In this study, we searched for novel long non-coding RNA (lncRNA) as well as validated several known candidates suitable as probable biomarkers for primary liver tumors of various etiology. We described a novel lncRNA HELIS (aka “HEalthy LIver Specific”) and estimated its expression by RT-qPCR in 82 paired tissue samples from patients with hepatocellular carcinoma (HCC), cholangiocarcinoma (CCA), combined HCC-CCA, pediatric hepatoblastoma (HBL) and non-malignant hepatocellular adenoma (HCA) and focal nodular hyperplasia (FNH). Additionally, we examined expression of cancer-associated lncRNAs HULC, MALAT1, UCA1, CYTOR, LINC01093 and H19, which were previously studied mainly in HCC. We demonstrated that down-regulation of HELIS strongly correlates with carcinogenesis; whereas in tumors with non-hepatocyte origin (HBL, CCA) or in a number of poorly differentiated HCC, this lncRNA is not expressed. We showed that recently discovered LINC01093 is dramatically down-regulated in all malignant liver cancers; while in benign tumors LINC01093 expression is just twice decreased in comparison to adjacent samples. Our study revealed that among all measured biomarkers only down-regulated HELIS and LINC01093, up-regulated CYTOR and dysregulated HULC are perspective for differential diagnostics of liver cancers; whereas others demonstrated discordant results and cannot be considered as potential universal biomarkers for this purpose.

First records of Myxomycetes for the Republic of Belarus, Basidiomycetes for the Novosibirsk and Volgograd regions, the Republic of Altai, lichens and lichenicolous fungi for the Tver Region, the republics of Altai and Tyva, bryophytes for Novaya Zemlya, the Pskov, Tula and Saratov regions, the Republic of Ingushetia, the Khanty-Mansi Autonomous Area — Yugra, the Republic of Buryatia, the New Siberian Islands Archipelago, the Peninsula and excluded lichens for the Republic of Altai are presented. Data on localities, habitats, substrates and herbarium specimens of all species are provided.

Hepatocellular adenoma (HCA) is the uncommon benign liver tumor, which is characterized by monoclonal proliferation of mature hepatocytes. HCAs have many genetic and molecular features that determine their natural behavior (such as malignant transformation), but MRI features are studied just for two subtypes (H-HCA и I-ICA). This article presents clinical case of 58 y.o. woman with hepatitis C, hepatic adenomatosis and malignant transformation of one of multiple HCAs.

The use of nonsteroidal anti-inflammatory drugs (NSAID), even if short-term, may be associated to small intestinal complications, such as erosions, ulcers and chronic mucosal inflammation. Video capsule endoscopy allows for identification of such lesions in 20 to 55% of the patients who have taken nonselective NSAID for 2 to 4 weeks. The pathophysiology of NSAID-induced enteropathy is related to a reduced reparative potential of the mucosa and abnormalities of the microbial balance in the small intestine. In real world practice, NSAID enteropathy is commonly asymptomatic, and its manifestations, such as bleeding, perforation and ileus, are quite rare (about 0.3 episodes per 100 patient-years). The main manifestation of NSAID enteropathy is chronic iron deficient anemia. The use of rebamipide, sulfasalazine, mesalazine, and rifaximin has been discussed in the treatment of NSAID enteropathy, whereas its prevention implies preferential administration of coxibs, the use of rebamipide and probiotics.

Objective: to evaluate the effect of piribedil on cognitive functions in elderly patients with chronic cerebrovascular disease (CCVD) and cognitive impairment (CI). Patients and methods. A total of 67 patients aged 60-75 years with CCVD and CI were examined. A control group included 32 patients who had received basic therapy with antihypertensive and, if indicated, lipid-lowering and antithrombotic drugs. A study group consisted of 35 patients who additionally took piribedil 50 mg after evening meals for 3 months. Neuropsychological examination was made before and after a treatment cycle. Results and discussion. After 3 months, only the piribedil group showed a significant neuropsychological improvement (pConclusion. When used in CCVD and CI, piribedil 50 mg once daily for 3 months is able to improve cognitive functions in elderly patients, which indicates that it is feasible to use the drug in combined therapy with essential (antihypertensive, lipid-lowering, antithrombotic) medicines.

The article considers the primary results of geological, geophysical, geomorphological, and hydrophysical studies in the Barents and Kara seas conducted on cruise 49 of the R/V Akademik Nikolay Strakhov in 2020.

Intaking antithrombotic funds (ATA) and non-steroidal anti-inflammatory drugs (NSAIDs) is one of the most frequent causes of pathology in gastrointestinal (GI) tract.The purpose of the study: comparison of pathological changes of the mucous membrane in the upper GI tract, that occur against the background of ATA and NSAIDs admission.Material and methods. Endoscopic data of two groups of patients taking ATA and NSAIDS have been compared. The first group of 448 patients from the 10th Gastrointestinal Department in N.N. Burdenko Main Military Clinical Hospital was on record from 2013 to 2017. The patients had erosive ulcerous changes of gastrointestinal mucosa, occurred against the background of the ATA admission. The second group comprised 6431 patients with rheumatic diseases. They were hospitalized in the clinic of V.A. Nasonova Research Institute of Rheumatology in the period from 2007 to 2016 and took NSAIDs regularly.Results. Duodenal and gastric ulcer changes in gastric mucosa and duodenal ulcers were identified in 168 (37.5 %) patients taking ATA and in 1691 (26.3 %) patient treated with NSAIDS. Structure of pathology varied. So, against the background of ATA and NSAIDS admission, the number of acute gastric ulceration amounted to 6.5 % and 15.5 % (p < 0.001); acute ulcers duodenal was 2.9 % and 4.9 %; combined ulcerative lesions of gastric and duodenal was 2.9 % and 2.0 %; multiple erosions of gastroduodenal mucosa were 52.4 % and 15.7 % (p < 0.001); single erosion was 35. 1% and 61.6 %. The factor of ulcer history and age ≥ 65 years old increased significantly the risk of duodenal and gastric ulcer changes in patients taking ATA and NSAIDs: OR 5.182 (95% CI 2.701–9.942) and 3.24 (95% CI 2.19–5.34), 4.537 (95% CI 2.036–10.11) and 2.016 (95% CI 1.230–2.917) respectively. Intaking of proton pump inhibitor (PPI) reduced significantly the risk of complications for both ATA and NSAIDs: OR 0.329 (95% CI 0.199–0.546) and 0.317 (95% CI 0.210–0.428) respectively.Conclusion. The structure of pathology of mucous in the upper gastrointestinal tract that arose against the backdrop of ATA and NSAIDs admission is different. The first is characterized by a multiple erosion, while the second one has single acute distal gastric ulcers. The ulcerative history and advanced age of patients increase significantly the risk of complications concerning the gastroduodenal mucosa when using ATA and NSAIDs. PPI is the effective means of preventing this pathology.

The article presents an annotated cheklist of 32 species of myxomycetes found on the territory of the National Park “Narochansky”, including 28 species new for the National Park, and 21 have never been recorded for the Republic of Belarus. For every species data on locality, coordinates, plant association, substrate, collection date, and voucher number have been provided. The specimens are stored in herbaria of the V. F. Kuprevich Institute of Experimental Botany (MSK – F) or Komarov Botanical Institute (LE).

The operating principle of an optical high-resolution reflectometer running in the frequency domain (OFDR reflectometer) is examined. A mathematical model for measuring the parameters of fiber-optic systems using an OFDR reflectometer is presented. The accuracy characteristics of OFDR reflectometers are analyzed and the instrument accuracy is estimated quantitatively. Methods for calibrating OFDR reflectometers based on a distance scale are proposed and equipment for these methods is discussed.

Colon cancer is the 3rdmost common malignant neoplasm and the 4thleading cause of mortality from them. The majority of patients are diagnosed at stages II–IV, which indicates the need for markers that can predict disease progression, especially after surgical treatment. Recently, there has been a growing interest in exploring circulating tumor DNA as a marker of residual tumor in colon cancer. In 2018, the N.N. Blokhin National Medical Research Center of Oncology together with the Institute of Chemical Biology and Fundamental Medicine under the coordination of the Center for Strategic Planning and Management of Biomedical Health Risks initiated a research project entitled “Development of an assay for the diagnosis of various malignant tumors and treatment efficacy monitoring based on the analysis of circulating tumor DNA from patient blood”. This article provides a theoretical background for the project and a report on its progress made so far.

Manifestations of fluids and deformations in the sedimentary cover, which are both factors of brightening (blanking anomalies) in seismoacoustic records, in the equatorial segment of the Atlantic coincide with the sublatitudinal zones of the activated passive parts of transform faults and with zones of lower gravity anomalies and higher values of remnant magnetization, which form as a result of serpentinization. The cause-and-effect sequence of intraplate phenomena includes: the contrasting geodynamic state → horizontal movements that form macrofractures → water supply to the upper mantle → serpentinization of rocks in the upper mantle → deformations associated with vertical uplift of basement and sedimentary cover blocks, coupled with fluid generation → and fluid accumulation in the sedimentary cover, accompanied by the formation of anomalies in seismoacoustic records. Based on the seismic data, we have identified imbricate-thrust deformations, diapir structures, stamp folds, and positive and negative flower structures, indicating the presence of strike-slip faults in the passive parts of transform faults. The general spatial distribution of deformation structures shows their concentration in cold mantle zones. Correlative comparison of the structural characteristics of deformations shows the direct relationship between the heights of structures and the development of serpentinization processes. As per the age of the basement, deformations range from 27–38 to 43–53 Ma; a quite thick sedimentary cover makes it possible to reveal them based on the characteristic types of seismoacoustic records. The formation of the Antilles arc ca. 10 Ma ago affected the equatorial segment of the Atlantic; it formed kink bands where lithospheric blocks underwent displacements with counterclockwise rotations, deformations related to compression and vertical uplift of crustal fragments, and local extension that favored degassing of endogenous fluids. Sublatitudinally oriented imbricate-thrust deformations with different vergences indicate irregularity and alternating strike-slip directions as blocks between fractures were laterally influenced.

The paper presents description of the relief, open fracture system, and submarine slides west of the Spitsbergen Archipelago in the Vestnesa Ridge area based on the data collected during cruises of the R/V Akademik Nikolaj Strakhov. Data pertaining to seismicity, as well as gas flares, chimneys, and holes are given based on the published sources. Analysis of the full information suggests the development of conditions favorable for large submarine landslides west of the Spitsbergen Archipelago.

Use of antithrombotic aids (ATA) significantly impact the prevention of life-threatening cardiovascular complications. ATA applications, however, are associated with a wide range of adverse digestive system responses. Due to, continuously growing clinical use of ATA this problem has become a current challenge of contemporary medicine.Purpose of the study was to evaluate the patterns of digestive system damage in patients receiving ATA.Materials and Methods. 672 patients were examined, 91.0% males, 46.7±17.4 years of age, who had digestive system changes that occurred due to ATA intake. 71 patients were admitted for treatment after gastrointestinal (GI) bleeding; other patients were hospitalized because of disorders of the digestive system or erosive and ulcerous changes of the digestive system detected by endoscopy. The following parameters were evaluated: GI bleeding sources, character of complaints, the endoscopic patterns due to intake of different ATAs (low doses of aspirin, warfarin, clopidogrel, dabigatran, rivaroxaban, low-molecular heparin, combined therapy), and of risk factors for GI complications.Results. The sources of GI bleeding (n=71) included gastric ulcers and/or erosions (39.4%), duodenum ulcers and/or erosions (21.1%), colon ulcers and/or erosions (28.2%), unknown (11.3%). The majority of 672 patients noticed various complaints: sensation of heaviness in epigastrium (62.8%), gastralgia (46.7%), burning sensation (34.3%). Endoscopy found erosive esophagitis (13.2%), ulcers in stomach and/or duodenum (11.6%), multiple ( 10) erosions of stomach or duodenum (17.1%), sporadic erosions of stomach or duodenum (24.4%). In 32.3% cases no erosive or ulcerous alterations were found. H. pylori was identified in 57.9% of patients. There was no significant difference in character of alterations in the upper digestive system between patients who received different ATA treatment, except of frequent erosive esophagitis in those patients who received dabigatran (16.8%). The elderly age ( 65 years), ulcer history, concomitant intake of NSAIDS, H. pylori presence, and smoking habit were associated with a higher occurrence of pathological alterations of digestive system. Presence of gastralgia did not correlate with the development of erosive and ulcerous alterations.Conclusion. In majority of patients who received ATA, the commonly observed erosive and ulcerous alterations in the digestive system might become a source of bleeding.

The use of glucocorticoids (GC) is considered one of the risk factors for the development of gastro-intestinal (GI) complications associated with the use of non-steroidal anti-inflammatory drugs (NSAIDs). However, the data on this issue are contradictory. Objective. To assess the frequency of ulceration and erosion in patients with rheumatic diseases (RD) receiving NSAIDs, depending on the concomitant use of GC. Materials and methods. A retrospective comparison was made of the incidence of gastrointestinal lesions detected in patients with RD during endoscopic examination in one medical center for 2007-2016. Three groups were formed: in group 1 patients took only NSAIDs (n=4823, women 80.7%, age 51.1 + 15.4 years), in group 2 patients took NSAIDs and GC (n = 1608, women 89, 8%, age 50.4 + 14.6 years), in group 3 - only patients took GC (n=1135, women 92.7%, age 44.1 + 15.3 years). The detection of multiple erosions (>10, ME) and gastric and / or duodenal ulcers was as-sessed. Results. The frequency of ME and ulcers in patients of groups 1 and 2 did not differ significantly: 10.5% and 8.5%, odds ratio 0.799 (95% confidence interval 0.546-1.169, p=0.072). Risk factors, such as age > 65 years, ulcer history and low-dose aspirin, did not affect this pattern. The incidence of ME and ulcers was significantly lower in Group 3 patients than in Groups 1 and 2: 6.3% (p

The purpose of this article is to analyze the reasons and the substantive content of the critical discourse on totalitarianism developed in foreign historiography of the 1960s. The analysis is based on the fundamental methodological principles of historical study: systemic approach of historicism and scientific objectivity. The research focuses on the works by famous foreign researchers in the area: H. Arendt, P. Sorokin, K. Friedrich, Z. Brzezinski, R. Мills, A. Ulam. The content of these works makes it possible to highlight the main methodological problems of critical discourse. The author criticizes the totalitarian model for its structural and external uniformity and lack of differentiation of totalitarian regimes. Revisionism in foreign historiography of the 1960s contributed to the study of Soviet society on the basis of sociological methodology by highlighting its high social mobility. The critical approach specifies the differences between communist and fascist systems and the peculiarities of individual communist regimes. However, the representatives of the critical approach failed to create a coherent theory compatible to the one offered by the adherents of totalitarianism. The critical discourse of totalitarianism in the 1960s contributed to the formation of a modernized concept of the phenomenon. The final part of the article contains the main conclusions of the discussion. The content and results of this article can be used in foreign historiography courses.

Hydrochemical analysis of the high-salinity lakes in the Ishim Plain (>250–300 g/L) located at the border with the Northern Kazakhstan uranium ore province is performed. The studies have shown that the main factor of concentration and redistribution of uranium in the lake basins of the Ishim Plain are the processes of intense salt deflation causing sanding of lakes and uranium depletion in the near-surface layer of the bottom deposits. The correlation between the hydroxide forms of uranium binding in the bottom lacustrine deposits of the Ishim Plain and the coffinite composition of the Semizbai deposit makes it possible to consider this province to be promising for the discovery of hydromineral uranium deposits.

Novel oral anticoagulants (NOACs), such as the direct thrombin inhibitor dabigatran and the selective factor Xa inhibitors rivaroxaban and apixaban, are increasingly used as an effective antithrombotic drug in real clinical practice. Unfortunately, these medications can cause severe adverse events, including gastrointestinal bleeding, one of the most common events. This complication annually develops in 2–3% of patients taking NOACs. The sources of bleeding can be in both the upper or lower gastrointestinal tract (GIT). The common cause of bleeding is undiagnosed GIT neoplasms, often colorectal cancer. Clinical and cohort studies show that the greatest risk of bleeding is observed with the use of rivaroxaban. The risk factors are advanced age, concurrent administration of nonsteroidal anti-inflammatory drugs, aspirin, and other anticoagulants, gastrointestinal diseases, H. pylori infection, impaired renal and hepatic functions, and alcohol intake. Gastrointestinal bleeding is treated on general principles, by applying endoscopic and surgical techniques. Particular importance is attached to the blockade of the anticoagulant effects of NOACs. For this, the entire range of antidotes, such as idarucizumab (it has been already applied in several countries of the world), andexanet, and ciraparantag, has been recently designed and is undergoing clinical trials. Bleeding prevention involves control of risk factors, rational use of NOACs, prophylactic administration of proton pump inhibitors, timely discontinuation of anticoagulation prior to traumatic medical procedures on the gastrointestinal organs (before certain endoscopic procedures in particular).

On cruises 25 (2007) and 28 (2011) of the R/V Akademik Nikolai Strakhov in the northern part of the Barents Sea, the Geological Institute, Russian Academy of Sciences, conducted comprehensive research on the bottom relief and upper part of the sedimentary cover profile under the auspices of the International Polar Year program. One of the instrument components was the SeaBat 8111 shallow-water multibeam echo sounder, which can map the acoustic field similarly to a side scan sonar, which records the response both from the bottom and from the water column. In the operations area, intense sound scattering objects produced by the discharge of deep fluid flows are detected in the water column. The sound scattering objects and pockmarks in the bottom relief are related to anomalies in hydrocarbon gas concentrations in bottom sediments. The sound scattering objects are localized over Triassic sequences outcropping from the bottom. The most intense degassing processes manifest themselves near the contact of the Triassic sequences and Jurassic clay deposits, as well as over deep depressions in a field of Bouguer anomalies related to the basement of the Jurassic–Cretaceous rift system

—The article briefly describes the results of integrated geological, geophysical, and hydrophysical studies on the shelves of the Barents and Kara seas. The research was aimed at substantiating the most probable scenario of development of natural conditions of Russia’s Western Arctic against ongoing climate warming, sea level rise, and increasing anthropogenic impact. Studies have confirmed widespread modern hazardous geological and geomorphological processes of different genesis in the Barents–Kara region.

Soft drinks are widely used and have steady demand. The content of beverages includes food colours and flavourings of different origins. Currently, consumers prefer drinks that contain natural raw materials. The purpose of this study is to analyze the product range and informational identification of the naturalness of food colours and flavourings declared by the producers of soft drinks presented by the domestic food retailers. The study objects are 48 soft drinks of various brands sold in the Lenta retail chain. When performing research, methods of analysis and systematization were used. The study of food colours and flavourings contained in soft drinks was based on the method of observation and content analysis. As a result of this study, information about ingredients indicated on the labels of soft drinks from the product range of the Lenta retail chain was researched. When studying the labels, special attention was paid to the presence or absence of food colours and flavourings in the sold beverages as well as whether these ingredients are natural. Depending on the presence of colours and/or flavourings in the beverage, the structure calculation of the soft drinks range was made. It was found that a great part of the Lenta assortment includes soft drinks that are coloured with one or more natural food colours (48 %), as well as soft drinks that do not contain food colours (25 %). Synthetic food colours are found in 21 % of beverages; soft drinks containing natural and synthetic colours make up 6 % of the range. It is revealed that there is no uniformity of information about the flavouring used in the labelling of soft drinks, consequently it makes difficult for the consumer to choose the product. Attained results can have practical implementation. The product range formation of domestic soft drinks of adequate quality helps to increase the competitiveness of Russian brands, reduce the consumer health risk, and meet consumer demand for quality products.

Prevention of gastrointestinal tract (GIT) complications is the most important element for the rational use of nonsteroidal anti-inflammatory drugs (NSAIDs) and low-dose aspirin (LDA). Proton pump inhibitors (PPIs) have long been the only medication to prevent these complications. However, PPIs are only effective in preventing and treating upper GIT diseases (NSAID gastropathy) rather than small intestinal injury (NSAID enteropathy). Rebamipide has emerged as a novel agent to protect the gastrointestinal mucosa today. The effect of the drug differs from that of PPIs: it is a typical gastroand enteroprotector that enhances the synthesis of endogenous prostaglandins and possesses a significant anti-inflammatory potential. Rebamipide has long been widely used by doctors inJapan,South Korea, andChinaas an effective and safe agent for the treatment of many diseases of the digestive system. There is a strong evidence base for the efficacy of rebamipide in preventing and treating NSAID gastropathy and NSAID enteropathy (including LDA-induced injuries). Controlled studies have found that the drug is not inferior to the classic gastroprotective agent misoprostol, significantly outperforming the latter in its tolerability. This review describes the mechanism of action of rebamipide and main clinical trials of its therapeutic effect in NSAID gastropathy and NSAID enteropathy.

Aim. To study prevalence of resistance to acetylsalicylic acid, clopidogrel and dual resistance in percutaneous coronary intervention (PCI), to identify clinical risk factors of resistance development, to study effects of concomitant therapy on resistance development, to identify relationship between risk of cardiovascular complications and activity of platelet aggregation, to assess safety of dual antiplatelet therapy , and to suggest possible ways to overcome clopidogrel resistance. Material and Methods. Patients (n=100) with stable angina class II-IV, that were planned for PCI, were included in the study. Patients randomized to group A (n=53) received clopidogrel 75 mg daily for 7 days before PCI, and later were allocated to subgroups of clopidogrel sensitive or resistant depending on platelet aggregation. In resistant subgroup clopidogrel daily dose was increased to 150 mg for the whole next period of observation. Patients randomized to group B (n=47) received a loading dose of clopidogrel 300 mg one day before PCI. Depending on the results of platelet reactivity assessment, patients were split into sensitive or resistant subgroups. Patients of resistant subgroup received the second loading dose of clopidogrel 300 mg before PCI and started to take clopidogrel 150 mg daily after PCI. Patients of sensitive subgroup did not receive the second clopidogrel loading dose and started to take clopidogrel in usual daily dose of 75 mg. The combined endpoint (after 6 and 12 months) included cardiovascular death, recurrent nonfatal myocardial infarction, recurrent angina, acute ischemic stroke, acute impairment of peripheral circulation. Results. Increased reactivity of platelets to acetylsalicylic acid was detected in 21% of patients. Resistance to clopidogrel in both groups was 56%. Double resistance was registered in 8% of patients. The development of resistance to clopidogrel was related with obesity (p=0.014) and hyperglycemia (p=0.017). 4 and 11 cardiovascular events were registered in 6 and 12 months, respectively. Conclusion. To assess efficacy of antiplatelet therapy it is advisable to study platelet aggregation before and shortly after PCI, especially in patients with obesity and glucose metabolism disturbances. Knowledge of changes in platelet aggregation during clopidogrel therapy can be usefull for timely correction of antiplatelet therapy. Increase in clopidogrel dose up to 150 mg a day is one of the possible way to overcome resistance to clopidogrel.

3559 Background: Recently, conflicting evidence has emerged showing the association of ctDNA level and cancer progression. The aim of our study was the development of a method for detecting ctDNA in plasma and the investigation of the prognostic value of ctDNA retention after surgery in the prospective way. Methods: This prospective, single-center, sample collection study; pts with early-stage malignancies of the different origin were included. Tumor somatic mutations were determined by target sequencing of DNA from FFPE tumor blocks. Sequencing was performed using the custom NGS panel covering regions of frequent somatic mutations in 50 genes. Tumor-specific mutations were monitored in plasma samples taken before and after surgery. The median time between surgery and plasma collection was 7 days (5-15). Mutations of plasma ctDNA were determined by ddPCR. The plasma sample was considered "positive" if the content of ctDNA was more than 0.5 copies of mutant DNA in ml plasma. We needed 265 pts for improving 1-year disease free survival (DFS) from 60% to 80% with α=0.01, β=0.1, 10% loss of f.-up and duration of the study for 2 years. Results: The study comprised 271 pts with various cancers including colorectal – 91 (33,6%), pancreatic – 37 (13,7%), breast – 66 (24,4%), lung – 35 (12,9%) and gastric cancer – 42 (15,5%). Pts with stage I was 50 (18,5%), stage II – 118 (43,5%) and stage III – 103 (38%). The median time of the f.-up was 9 mos. (1-37). No significant association was found between the level of ctDNA before surgery and DFS either in the general group or in groups stratified by tumor sites (HR 2.4, 95%CI 0.8-7.1, р=0.12 and HR 1.5, 95%CI 0.4-6.3, р=0.5, correspondingly). ctDNA was detected in the plasma after surgery in 57 (10%) pts: 9 (9.9%) cases of colorectal, 10 (27%) - pancreatic, 9 (13.6%) - breast, 19 (54.3%) - lung, and 10 (23.8%) - gastric cancer. Progression of the disease was detected in 28/57 (49%) pts with ctDNA(+) and 17/214 (8%) - in ctDNA(-) pts (p