Publications by authors named "NIKITINA N"

A thorough study of Clear Cell Renal Cell Carcinoma (ccRCC) shows that combining tyrosine kinase inhibitors (TKI) with immune checkpoint inhibitors (ICI) shows promising results in addressing the tumor-promoting influences of abnormal immunological and molecular biomarkers in metastatic Clear Cell Renal Cell Carcinoma (ccRCC). These abnormal biomarkers enhance drug resistance, support tumor growth, and trigger cancer-related genes. Ongoing clinical trials are testing new treatment options that appear more effective than earlier ones.

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The genetic basis of somatic cell identity in avian sex determination is still unknown. FET1, an endogenous retrovirus, has previously been demonstrated to be expressed during gonad development. Here, we report expression of FET1 related transcripts in non-gonadal tissue during chicken development.

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The Fibroblast growth factor (FGFs) family consists of at least 22 members that exert their function by binding and activating fibroblast growth factor receptors (FGFRs). The Fgf8/FgfD subfamily member, Fgf17, is located on human chromosome 8p21.3 and mouse chromosome 14 D2.

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Quantitative and volumetric assessment of filamentous actin fibers (F-actin) remains challenging due to their interconnected nature, leading researchers to utilize threshold based or qualitative measurement methods with poor reproducibility. Here we introduce a novel machine learning based methodology for accurate quantification and reconstruction of nuclei-associated F-actin. Utilizing a Convolutional Neural Network (CNN), we segment actin filaments and nuclei from 3D confocal microscopy images and then reconstruct each fiber by connecting intersecting contours on cross-sectional slices.

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Using anti-neurofilament H non-phosphorylated antibodies (SMI-32) as markers for the neuronal maturation level and Y channel responsible for motion processing, we investigated early postnatal development of the primary visual areas 17 and 18 in cats aged 0, 10, 14, and 34 days and in adults. Two analyzed parameters of SMI-32-immunolabeling were used: the total proportion of SMI-32-labeling and the density of labeled neurons. (i) The developmental time course of the total proportion of SMI-32-labeling shows the general increase in the accumulation of heavy-chain neurofilaments.

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Article Synopsis
  • Sarcoglycanopathies are a group of limb-girdle muscular dystrophies (LGMD R3-R6) caused by mutations in the SGCA, SGCB, SGCG, and SGCD genes, with low global prevalence.
  • A study analyzed clinical and genetic data from 49 Russian patients, revealing that 71.4% had SGCA gene variants, while SGCB and SGCG had variants in 12.2% each, and SGCD in 4.1%.
  • The most common mutations were c.229C>T and c.271G>A in SGCA, and the overall incidence of sarcoglycanopathies in Russia was estimated at 1 in 4,115
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Background: Paclitaxel is a highly effective chemotherapeutic agent used to treat breast, ovarian, and other cancers. At the same time, paclitaxel causes peripheral neuropathy as a side effect in 45%-70% of patients.

Aim: The aim of the study was to investigate the effect of paclitaxel-induced peripheral neuropathy on the development of pathological changes in the salivary glands of animals and to explore the possibility of correction of the identified changes with vitamin B/ATP complex.

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In vitro validation of therapeutic and recombinant proteins expressed from transgenic chickens is limited by the co-culture of fibroblasts. Here, we present a protocol for isolating pure epithelial cells derived from the magnum tubular glands of the chicken oviduct. We describe steps for preparing solutions and buffers, tissue collection, processing, dissociation, and Percoll density centrifugation to separate the epithelial cells from co-isolated fibroblasts.

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Currently, an urgent need in the field of wearable electronics is the development of flexible sensors that can be attached to the human body to monitor various physiological indicators and movements. In this work, we propose a method for forming an electrically conductive network of multi-walled carbon nanotubes (MWCNT) in a matrix of silicone elastomer to make stretchable sensors sensitive to mechanical strain. The electrical conductivity and sensitivity characteristics of the sensor were improved by using laser exposure, through the effect of forming strong carbon nanotube (CNT) networks.

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Quantitative and volumetric assessment of filamentous actin fibers (F-actin) remains challenging due to their interconnected nature, leading researchers to utilize threshold based or qualitative measurement methods with poor reproducibility. Here we introduce a novel machine learning based methodology for accurate quantification and reconstruction of nuclei-associated F-actin. Utilizing a Convolutional Neural Network (CNN), we segment actin filaments and nuclei from 3D confocal microscopy images and then reconstruct each fiber by connecting intersecting contours on cross-sectional slices.

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Background: There is enough evidence of the negative impact of excess weight on the formation and progression of res piratory pathology. Given the continuing SARS-CoV-2 pandemic, it is relevant to determine the relationship between body mass index (BMI) and the clinical features of the novel coronavirus infection (NCI).

Aim: To study the effect of BMI on the course of the acute SARS-COV-2 infection and the post-covid period.

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Aim: Study the impact of various combinations of comorbid original diseases in patients infected with COVID-19 later on the disease progression and outcomes of the new coronavirus infection.

Materials And Methods: The ACTIV registry was created on the Eurasian Association of Therapists initiative. 5,808 patients have been included in the registry: men and women with COVID-19 treated at hospital or at home.

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Objective: The aim: The aim of the study was to determine the content of metalloproteinase-2 (MMP-2) and metalloproteinase-9 (MMP-9) in the skin of rats of different ages after closure of the wound bed.

Patients And Methods: Materials and methods: The studies were performed on 40 white nonlinear male rats, 20 of which were 3 months old and 20 - 12 months. In each group 10 rats were control and in 10 others facelift operations were performed and cut wounds on the anterior abdominal wall were simulated.

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Aim      To study the effect of regular drug therapy for cardiovascular and other diseases preceding the COVID-19 infection on severity and outcome of COVID-19 based on data of the ACTIVE (Analysis of dynamics of Comorbidities in paTIents who surVived SARS-CoV-2 infEction) registry.Material and methods  The ACTIVE registry was created at the initiative of the Eurasian Association of Therapists. The registry includes 5 808 male and female patients diagnosed with COVID-19 treated in a hospital or at home with a due protection of patients' privacy (data of nasal and throat smears; antibody titer; typical CT imaging features).

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Introduction: Duck viral hepatitis type I (DVH-I) is a poorly studied contagious disease caused by RNA-containing duck (Anatinae) hepatitis virus type I (Picornaviridae: Avihepatovirus: Avihepatovirus A). This infection is widespread in many countries, including Russia, and causes significant damage to industrial duck breeding. The study of interferonogenic activity of its etiologic agent strains is of great importance in solving the problem of developing effective means to control the disease.

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The objective of the present study was to review the existing data on the mechanisms involved in the endocrine disrupting activity of mancozeb (MCZ) in its main targets, including thyroid and gonads, as well as other endocrine tissues that may be potentially affected by MCZ. MCZ exposure was shown to interfere with thyroid functioning through impairment of thyroid hormone synthesis due to inhibition of sodium-iodine symporter (NIS) and thyroid peroxidase (TPO) activity, as well as thyroglobulin expression. Direct thyrotoxic effect may also contribute to thyroid pathology upon MCZ exposure.

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Accumulation of the heavy-chain neurofilaments reflects the maturation status of neuronal structures. The spatial distribution and postnatal developmental dynamic of neurons expressing nonphosphorylated heavy-chain neurofilaments (labeled by SMI-32 antibody) were analyzed in the dorsal lateral geniculate nucleus (LGNd) of the cat. Both interlaminar and intralaminar differences in the dynamic of SMI-32 staining were observed.

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Unlabelled: Tuberculosis is a chronic infectious disease, usually localized in the respiratory system and representing one of the most important global social and biomedical health problems associated with the spread of therapy-resistant forms (multidrug-resistant and extensively drug-resistant tuberculosis). One of the most promising targets for the development of antimycobacterial drugs is the enzyme DprE1, which is involved in the synthesis of the cell wall of mycobacteria. In the series of DprE1 inhibitor drugs, the most advanced drug is PBTZ169 (INN maсozinone).

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Unlabelled: Glycogen storage disease type 0 (GSD 0) is an autosomal recessive disorder of glycogen metabolism caused by mutations in the gene manifesting in infancy or early childhood and characterized by ketotic hypoglycemia after prolonged fasting, and postprandial hyperglycemia and hyperlactatemia. GSD 0 is a rare form of hepatic glycogen storage disease with less than 30 reported patients in the literature so far.DNA samples of 93 Russian patients with clinical diagnoses of hepatic GSDs were collected and analyzed by next-generation sequencing custom target panel and by direct sequencing.

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This study aims to identify the role of the various electronic states of gold in the catalytic behavior of Au/MO/TiO (where MO are FeO or MgO) for the liquid phase oxidation of -octanol, under mild conditions. For this purpose, Au/MO/TiO catalysts were prepared by deposition-precipitation with urea, varying the gold content (0.5 or 4 wt.

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Systemic lupus erythematosus (SLE) is a systemic autoimmune disease of unknown etiology characterized by a wide range of clinical manifestations with damage to various organs and systems of the body. There are bad prognostic factors for SLE: damage to the heart, kidney, central nervous system, the development of hematological crises and secondary antiphospholipid syndrome. A number of authors consider systemic lupus erythematosus a "new" risk factor for atherosclerosis.

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Fabry disease (FD [MIM:301500]) is an X-linked lysosomal storage disorder caused by mutations in the GLA gene. Deficient activity of its product, lysosomal enzyme α-galactosidase A (α-Gal A), leads to excessive accumulation of glycosphingolipids in cells of multiple organs. The establishing of the diagnosis is challenge in female patients because of milder clinical manifestation and normal α-Gal A activity.

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Introduction: Active circulation of pandemic influenza and new variants of influenza H3N2 strains requires monitoring of antiviral efficacy of drugs permitted for influenza therapy in the Russian Federation.

Purpose: Assessment of antiviral efficacy of «Kagocel» substance against influenza viruses H1N1, H1N1pdm09 and H3N2 in vitro.

Material And Methods: Cytotoxic effect of «Kagocel» substance on MDCK cells had been determined by stained with MTS.

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