Publications by authors named "Kovaleva E"

Article Synopsis
  • The diagnosis of thyroid gland tumors is complicated, requiring specialized expertise and significant time, especially when analyzing many whole slide images from one patient.
  • This paper explores using artificial intelligence, specifically a Multiple-Instance Learning model, trained on weak patient-level data from over 1100 patients to differentiate between benign and malignant cases, achieving a notable F1-Score of 0.85.
  • The study highlights challenges in using real-world data, such as potential issues that could lead to model overfitting, and emphasizes that detailed annotations improve accuracy, especially in smaller datasets.
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Background: Primary hyperparathyroidism (PHPT) is a endocrine disorder characterized by excessive secretion of parathyroid hormone (PTH) from parathyroid gland tumors. Parathyroidectomy (PTE) is the main treatment for PHPT, but it can lead to hypocalcemia in up to 46% of cases. Hypocalcemia is associated with seizures and life-threatening cardiac arrhythmias, and vitamin D deficiency can exacerbate PHPT severity and contribute to «hungry bones syndrome,» resulting in severe and persistent postoperative hypocalcemia.

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  • Type 2 diabetes involves high blood sugar and reduced function of insulin-producing β-cells, prompting research into potential treatments.
  • This study tested the effects of betulin, a natural compound from birch bark, on diabetic rats, focusing on various health parameters over a 28-day period.
  • Results indicated that betulin improved blood sugar levels and reduced liver and kidney damage in diabetic rats while promoting the regeneration of β-cells, suggesting it could be a promising treatment for diabetes.
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Objective: To determine the frequency of and among patients admitted to a24-hour emergency hospital.

Material And Methods: The study included 2887 patients with a traumatic history who were admitted to the hospital for emergency reasons. This principle of sampling allowed us to exclude a high concentration of studies of patients with chronic neurological diseases, the cause of which could be symptomatic Kimmerle's anomaly (KA).

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  • Circadian rhythm disruption is linked to increased risk and severity of inflammatory bowel disease, as shown by previous studies highlighting its effects on intestinal inflammation in mice.
  • In this experiment, male mice were divided into two groups—one exposed to circadian shifts and the other kept on a regular light-dark cycle—to assess how these changes influence gut microbiota composition.
  • Results indicated that mice with disrupted circadian rhythms experienced reduced gut microbiota richness and diversity, alongside changes in specific bacterial genera, suggesting that this disruption could negatively impact gut health and colitis development.
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Siebold et Zucc. is an unstudied single-species genus belonging to the tribe Cimicifugeae (Ranunculaceae). The only species of this genus- Siebold and Zucc.

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Blood metabolomics profiling using mass spectrometry has emerged as a powerful approach for investigating non-cancer diseases and understanding their underlying metabolic alterations. Blood, as a readily accessible physiological fluid, contains a diverse repertoire of metabolites derived from various physiological systems. Mass spectrometry offers a universal and precise analytical platform for the comprehensive analysis of blood metabolites, encompassing proteins, lipids, peptides, glycans, and immunoglobulins.

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Background: Timely referral of patients for genetic testing to rule out MEN1-associated primary PHPT is important factor in determining treatment strategy and prognosis. In the context of the limited availability of genetic testing, the search for clinical markers indicative of MEN1 gene mutations remains an extremely relevant task.

Aim: To determine the diagnostic value of clinical features of primary PHPT in young patients for predicting the presence of MEN1 gene mutations.

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Introduction: Cardiovascular diseases (CVD) and metabolic disorders (MD) have retained leading positions in the structure of morbidity and mortality for many years. Primary hyperparathyroidism (PHPT) is also associated with a greater incidence of CVD and MD. The aim of the present study was to describe the prevalence and structure of CVD and MD in hospitalized patients with PHPT and to search for possible associations between these pathologies.

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Currently, the efficacy of drug therapy for post-traumatic stress disorder or PTSD leaves much to be desired, making nutraceutical support a promising avenue for treatment. Recent research has identified the protective effects of resveratrol in PTSD. Here, we tested the behavioral and neurobiological effects of combining cheese consumption with resveratrol supplements in an experimental PTSD model.

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Article Synopsis
  • Betulin, a natural triterpene derived mainly from birch bark, shows potential for wound healing and various pharmacological benefits across several diseases, including cardiovascular issues, cancer, and inflammation.
  • The compound exhibits multitarget anti-inflammatory properties, which help regulate important signaling pathways like MAPK and NF-κB, potentially influencing diverse biological networks.
  • There is a hypothesis that betulin could serve as a new lead for drug development due to its ability to modify multiple pharmacological targets and improve responses to oxidative stress and inflammation.
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Introduction: Until recently no major epidemiological research of primary hyperparathyroidism (PHPT) has been conducted in the Russian Federation, this led to the creation of the Russian online registry. The objective of this study is to estimate the clinical and biochemical profile, classical and non-classical complications, surgical intervention and medical therapy of the patients with different forms of PHPT in the Russian Federation.

Materials And Methods: The cross-sectional, observational, continuous study was conducted at the Endocrinology Research Centre (Moscow).

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Glucocorticoids are metabolized by the CYP3A isoform of cytochrome P450 and by 11-β-hydroxysteroid dehydrogenase type 1 (11β-HSD-1). Experimental data suggest that post-traumatic stress disorder (PTSD) is associated with an increase in hepatic 11β-HSD-1 activity and a concomitant decrease in hepatic CYP3A activity. -resveratrol, a natural polyphenol, has been extensively studied for its antipsychiatric properties.

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Phlorotannins are secondary metabolites produced mainly by brown seaweeds (Phaeophyceae) and belong to the class of polyphenolic compounds with diverse bioactivities. The key factors in the extraction of polyphenols are the selection of a suitable solvent, method of extraction and selection of optimal conditions. Ultrasonic-assisted extraction (UAE) is one of the advanced energy-saving methods suitable for the extraction of labile compounds.

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Inorganic pyrophosphatases (PPases) catalyze an essential reaction, namely, the hydrolysis of PP, which is formed in large quantities as a side product of numerous cellular reactions. In the majority of living species, PP hydrolysis is carried out by soluble cytoplasmic PPase (S-PPases) with the released energy dissipated in the form of heat. In part of this energy can be conserved by proton-pumping pyrophosphatase (H-PPase) in the form of a proton electrochemical gradient for further ATP synthesis.

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Transplantation of mesenchymal stromal cells (MSCs) provides a powerful tool for the management of multiple tissue injuries. However, poor survival of exogenous cells at the site of injury is a major complication that impairs MSC therapeutic efficacy. It has been found that tissue-oxygen adaptation or hypoxic pre-conditioning of MSCs could improve the healing process.

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A method is reported to control the stereoselectivity at C(20) in the syntheses of 20--21,21,21-trifluorothevinols (12), the opioid ligands incorporating fluorine atoms within the pharmacophore associated with the surroundings of the C(20) carbon atom. The C(20)-alcohols 12 can be prepared either by reaction of 21,21,21-trifluorothevinone (9) with RM (R = alkyl; M = Li, MgX) or by reaction of thevinone (2) and related non-fluorinated ketones with CFSiMe. In general, alcohols 12 were formed as mixtures of the C(20)-epimers, with the major epimers of the alcohols obtained from the aforementioned reactions exploiting RLi CFSiMe with opposite absolute configurations at C(20).

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Only a few studies evaluating the metabolism of vitamin D in patients with hypoparathyroidism (HypoPT) have been performed thus far, and, in particular, they mainly investigated the process of vitamin D activation (specifically, 1α-hydroxylation). This study, therefore, aimed to evaluate the extended spectrum of vitamin D metabolites in patients with HypoPT compared to healthy individuals. We examined 38 adult patients with chronic HypoPT in comparison to 38 healthy adults.

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Purpose: Dabrafenib and trametinib combination therapy (dab + tram) is indicated to treat BRAF V600 mutation-positive unresectable/metastatic melanoma and as adjuvant treatment for resected stage III disease. Dab + tram-related pyrexia may require early therapy discontinuation. A modified Delphi panel was conducted to develop consensus on the optimal management of dab + tram-related pyrexia in patients with melanoma.

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The parathyroid glands are the most important regulators of mineral metabolism. The parathyroid glands were first discovered only in 1880 and their function went the long way unrecognized. Even the term "parathyroid gland" itself speaks of the initial misconception of it as an underdeveloped part of the thyroid.

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Background And Objective: Preoperative diagnosis of parathyroid carcinoma (PC) is critical for the determination of the scope of surgical intervention. Nowadays, specific diagnostic markers for differentiation of PC and benign tumors are unknown, and less than half of patients with PC undergo necessary surgery. The aim of this study was to develop the instrument for preoperative diagnosis of PC.

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Background: Differential diagnosis between the normocalcemic primary hyperparathyroidism (nPHPT) and secondary hyperparathyroidism (SHPT) due to hypercalciuria remains a challenge.

Aim: The aim of this study was to investigate the capability of short test with hydrochlorothiazide for the differential diagnosis of nPHPT and SHPT.

Materials And Methods: A retrospective study was conducted with the participation of 28 patients who underwent a functional test with thiazide diuretics during hospitalization in the Department of parathyroid glands pathology and mineral disorders of the Endocrinology Research Centre, Russia.

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The rapid extraction of high-purity nucleic acids from complex biological samples using conventional methods is complicated. Therefore, in this study, glycine-pillar[6]arene (Gly-P6)-functionalized tapered nanochannels were constructed using 32-mer single-stranded . DNA (ssDNA) as a model sequence, which can selectively transport ssDNA by multiple noncovalent forces (transport flux of 2.

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Currently, five oral anticoagulants have been shown to be effective in preventing recurrent ischemic stroke and/or systemic embolism in patients with non-valvular atrial fibrillation. However, 1.1-2.

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Introduction: Frostbite is a traumatic injury of the tissues upon low temperature environment exposure, which is characterized by direct cell injury due to freezing-thawing followed by development of an acute inflammatory process. Severe frostbite can lead to necrosis of soft tissues and loss of a limb. Mesenchymal stromal cells (MSCs) have a unique ability to modulate pathogenic immune response by secretion of paracrine factors, which suppress inflammation and mediate more efficient tissue regeneration.

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