Publications by authors named "PETROVA E"

Thyroid cancer (TC) remains the most common cancer in endocrinology. Differentiated thyroid cancer (DTC), the most common type of TC, generally has a favorable outlook with conventional treatment, which typically includes surgery along with radioiodine (RAI) therapy and thyroid-stimulating hormone (TSH) suppression through thyroid hormone therapy. However, a small subset of patients (less than 5%) develop resistance to RAI.

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One of the key strategies for tissue engineering is to design multifunctional bioinks that balance printability with cytocompatibility. Here, we describe fibrillar hydrogels produced by Schiff base formation between B-type gelatin and oxidized sodium alginate, followed by the incorporation of type I collagen, yielding a new gel (MyoColl). The resulting hydrogel exhibits a temperature- and mass-ratio-dependent sol-gel transition, showing variability of hydrogel properties depending on the component ratio.

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Sunflower is a short-season crop of the Asteraceae family and the Helianthus genus and is the fourth most important oilseed crop in the world. During a field campaign, unusual symptoms (necrosis and longitudinal cracking of the petiole) were observed in a sunflower crop grown in the region of Kavarna (Dobrich district, Bulgaria) and strains of the genus Xanthomonas were isolated. Results based on phylogenetic and phylogenomic analyses showed that they clustered with Xanthomonas euroxanthea CPBF 424T species, a pathogenic strain isolated from walnut buds in Portugal and responsible for causing walnut bacterial blight (WBB).

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Background: The impact of resection margin and lymph node status on survival in patients undergoing resection for perihilar cholangiocarcinoma (pCCA) is controversial. The aim of this study was to investigate the influence of nodal and resection margin status on long-term survival after resection for pCCA.

Methods: Retrospective analysis of patients resected for pCCA at the University Hospital Frankfurt, Germany between 1999 and 2022.

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  • * However, the complexity of OA data collection and processing can lead to inconsistent methodologies among different users and developers.
  • * To address this, SKYQUANT 3D is introduced as a Python-based workflow that streamlines the analysis of 3D OA images, enabling easier batch processing, quantitative analysis, and graphical representation of results demonstrated in various preclinical and clinical tests.
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Large-scale genome-wide association studies (GWASs) have associated intronic variants in , encoding cAMP-specific phosphodiesterase-4B (PDE4B), with increased risk for post-traumatic stress disorder (PTSD), as well as schizophrenia and substance use disorders that are often comorbid with it. However, the pathophysiological mechanisms of genetic risk involving PDE4B are poorly understood. To examine the effects of PDE4B variation on phenotypes with translational relevance to psychiatric disorders, we focused on PDE4B missense variant M220T, which is present in the human genome as rare coding variant rs775201287.

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While A2A adenosine receptor (AR) was considered as a major contributor to adenosine-mediated immunosuppression, A2B, having the lowest affinity to adenosine, has also emerged as a potential contributor to tumor promotion. Therefore, in adenosine-rich tumor microenvironment (TME), where A2B could be complementary and/or compensatory to A2A, simultaneous targeting of A2A and A2B ARs can provide higher potential for cancer immunotherapy. We developed M1069-a highly selective dual antagonist of the A2A and A2B AR.

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Inspired by our finding that metallic Ni particles could be uniformly distributed on a reduced CeO surface and stabilized on Ce sites, we suppose a possible improvement in the activity and selectivity of the MgNi/SiO vegetable oil hydrogenation catalyst by increasing the surface metal Ni availability via modification by ceria. The proposed approach involved the addition of a CeO modifier to the SiO carrier and as a catalyst component. Evaluation of the structure, reducibility, and surface and electronic states of the CeO-doped MgNi/SiO catalyst was performed by means of the Powder X-ray diffraction (PXRD), Scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), and X-ray photoelectron spectroscopy (XPS) combined with High-resolution transmission electron microscopy (HRTEM), Temperature-programmed reduction with hydrogen (H2-TPR), and H-chemisortion techniques.

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  • Non-functioning adrenal incidentalomas (NFAIs) are associated with a higher risk of glucose profile issues, especially type 2 diabetes mellitus (T2DM), though clear links to Cushing's syndrome aren't fully established.
  • A comprehensive literature review analyzed 37 studies involving over 17,000 individuals, finding T2DM prevalence in NFAIs with mild autonomous cortisol secretion (MACS) ranged from 12% to 44%, with some studies showing rates as high as 45.2%.
  • Comparisons between NFAIs and non-tumor controls indicated increased T2DM rates in NFAIs, and while some studies examined Cushing's syndrome, results regarding glucose profile anomalies were inconsistent.
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  • - Macrophages are vital for maintaining specific functions and balance in the adrenal gland, particularly in regulating aldosterone production through their interactions with blood vessels.
  • - The study reveals that the absence of the molecule VEGF-A in macrophages leads to changes in blood vessel structure, resulting in increased aldosterone secretion and associated health issues like high blood pressure.
  • - Findings suggest that the communication between macrophages and endothelial cells is crucial for adrenal health and could have significant implications for understanding similar processes in other endocrine organs.
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Engineered calcium carbonate (CaCO) particles are extensively used as drug delivery systems due to their availability, biological compatibility, biodegradability, and cost-effective production. The synthesis procedure of CaCO particles, however, suffers from poor reproducibility. Furthermore, reducing the size of CaCO particles to <100 nm requires the use of additives in the reaction, which increases the total reaction time.

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Background: The Gambia has the 12 highest maternal mortality rate in the world, with 80% of deaths resulting from avoidable causes. Unawareness of pregnancy danger signs (DS) has been shown to be a barrier to seeking obstetric care, while app-based education intervention has shown promise.

Objective: We aim to assess patient awareness of DS, identify barriers to awareness, and evaluate potential for implementing smartphone-based technologies for education.

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Background: The method of transecting the pancreatic parenchyma during pancreatic resection may influence the rate of complications, including pancreatic fistula and bleeding. The objective of this study was to compare the transection of the pancreatic parenchyma during pancreatoduodenectomy with monopolar electrocautery versus scalpel in terms of postoperative complications.

Methods: A retrospective analysis of patients with open pancreatoduodenectomy from the German DGAV StuDoQ|Pancreas registry (January 2013 to December 2021) was performed.

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The permeation of small molecules across biological membranes is a crucial process that lies at the heart of life. Permeation is involved not only in the maintenance of homeostasis at the cell level but also in the absorption and biodistribution of pharmacologically active substances throughout the human body. Membranes are formed by phospholipid bilayers that represent an energy barrier for permeating molecules.

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  • The study investigates whether an aberrant right hepatic artery (aRHA) affects outcomes in patients with pancreatic head cancer who undergo surgical resection.
  • In a retrospective analysis of 145 patients, aRHA was present in 21 (14.5%), but no significant differences in overall survival or disease-free survival were found between patients with and without aRHA.
  • The only significant factor affecting hepatic recurrence was lymphatic vessel invasion, indicating that aRHA presence does not impact long-term survival or recurrence rates in this context.
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  • Endoscopic screening for esophageal cancer (EC) can enhance early diagnosis, but current optical microendoscopic methods struggle with limited field of view, impacting efficiency.
  • This study introduces a new end-expandable optical fiber probe aimed at improving the visual field and utilizes a deep-learning-based image super-resolution (DL-SR) method to enhance image quality.
  • Results show that the DL-SR method significantly improves image quality and allows endoscopists to interpret super-resolved images similarly to high-resolution ones, potentially advancing EC screening practices.
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The utilization of 3D printing- digital light processing (DLP) technique, for the direct fabrication of microneedles encounters the problem of drug solubility in printing resin, especially if it is predominantly composed of water. The possible solution how to ensure ideal belonging of drug and water-based printing resin is its pre-formulation in nanosuspension such as nanocrystals. This study investigates the feasibility of this approach on a resin containing nanocrystals of imiquimod (IMQ), an active used in (pre)cancerous skin conditions, well known for its problematic solubility and bioavailability.

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Objective: An analysis of the trend of overall and primary incidence of mental and behavioral disorders, including those caused by the use of psychoactive substances, in different age groups during the COVID-19 pandemic in Penza Oblast.

Material And Methods: The data were obtained from statistical report №12 for Penza Oblast. These included the overall and primary incidence of mental and behavioral disorders (MBD), as well as substance use-related MBD (MBDSUR), as calculated per 100.

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Importance: Surgical site infections frequently occur after open abdominal surgery. Intraoperative wound irrigation as a preventive measure is a common practice worldwide, although evidence supporting this practice is lacking.

Objective: To evaluate the preventive effect of intraoperative wound irrigation with polyhexanide solution.

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Objective: To substantiate the use of photochromotherapy (narrow-band optical radiation with an average wavelength of 650 nm) in the complex treatment of children with developmental speech delay on the type of general speech underdevelopment (GSU) of I and II degree.

Material And Methods: A number of children equal 70 aged from 4 to 6 years with developmental speech delay were examined. All patients were randomized into 2 clinically comparable groups: the 1st (study) group included 35 patients who received medical treatment in accordance with clinical recommendations in combination with the use of narrow-band optical radiation with an average wavelength of 650nm for 10 days; the 2nd (comparison) group consisted of 35 subjects who received standard drug therapy according to the established clinical recommendations.

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The lattice Schwinger model, the discrete version of QED in 1+1 dimensions, is a well-studied test bench for lattice gauge theories. Here, we study the fractal properties of this model. We reveal the self-similarity of the ground state, which allows us to develop a recurrent procedure for finding the ground-state wave functions and predicting ground-state energies.

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On mouse neuroblastoma (Neuro-2a) and human glioblastoma (U-87 MG) cell lines, we studied the effect of inducers and inhibitors of redox-sensitive signaling system of the antioxidant-responsive element Keap1/Nrf2/ARE on the main processes that determine nerve cell viability and vital activity (proliferative activity, apoptosis, autophagy, and activation of the Keap1/Nrf2/ARE system). Inhibitors of the Keap1/Nrf2/ARE system stimulate apoptosis more pronouncedly than inducers, have a weaker effect on autophagy, and do not change the nuclear to cytoplasmic Nrf2 ratio. In general, the revealed effects testify in favor of the potential effectiveness of stimulating the Keap1/Nrf2/ARE system for the prevention and adjuvant therapy of neurodegenerative diseases.

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  • Researchers developed a mouse model to better understand NS progression by analyzing molecular profiles that match both mice and human patients.
  • The study highlights the role of specific cytokines and proteases in disease severity and proposes a new signaling pathway involving tissue kallikrein-related proteases and IL-36, offering potential therapeutic targets.
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Hepatic fibrosis remains a significant clinical challenge due to ineffective treatments. 4-methylumbelliferone (4MU), a hyaluronic acid (HA) synthesis inhibitor, has proven safe in phase one clinical trials. In this study, we aimed to ameliorate liver fibrosis by inhibiting HA synthesis.

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