Publications by authors named "ElSherbini A"

Atrial and ventricular natriuretic peptides play an important role in the neurohormonal regulation of cardiac function. Plasma levels of these peptides may aid in the diagnosis and prognosis of different cardiac disorders, such as congestive heart failure, ischemic heart disease, and atrial fibrillation. However, the association between elevated pericardial fluid levels of natriuretic peptides and these clinical conditions has not been proven.

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Statement Of Problem: Studies on the significance of intensity on speech production with a tongue prosthesis are lacking, despite this being an important criterion in speech production in patients with total glossectomy.

Purpose: The purpose of this cross-over clinical study was to assess acoustic signal intensity and frequency in patients with total glossectomy rehabilitated with mandibular dentures with 2 different attachment designs for the tongue prosthesis.

Material And Methods: Seven participants initially received a mandibular denture with a tongue prosthesis attached using an acrylic resin plate.

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Article Synopsis
  • Mitochondrial dysfunction during Alzheimer's disease (AD) is linked to low energy production and increased reactive oxygen species, but the exact mechanisms, particularly related to sphingolipid metabolism, remain unclear.
  • In experiments with 5xFAD mice, researchers found that synaptic mitochondria display reduced oxygen consumption and altered protein levels related to energy production as early as 3 months of age.
  • The study identified abnormal sphingolipid levels in the mitochondria of 5xFAD mice, with increased long-chain ceramides and sphingosine, indicating that these lipid changes may contribute to mitochondrial dysfunction in early AD development.
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Small membranous extracellular vesicles (EV) incorporate proteins and nucleic acids from the parent cell. Proteins exposed on EV surface are dictated by cellular origin and biogenesis pathway. To better understand the EV origin and function, it is important to develop methods that reveal surface protein composition of heterogeneous EV populations in culture supernatants and in biofluids.

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Cardiac inflammation and fibrosis are central pathogenic mechanisms leading to heart failure. Transplantation is still the treatment of choice for many patients undergoing end-stage heart failure who remain symptomatic despite optimal medical therapy. In spite of considerable progress, the molecular mechanisms linking inflammation, fibrosis and heart failure remain poorly understood.

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The recent report of the first pig kidney transplant in a living human brings hope to thousands of people with end-stage kidney failure. The scientific community views this early success with caution as kidney xenotransplantation exhibits many challenges and barriers. One of these is coagulation dysregulation.

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Aim: This study was performed to evaluate the regenerative capacity of demineralized bone matrix vs fat graft, both guided by pericardium membrane in alveolar cleft model in albino rats.

Materials And Methods: A total of 72 rats were required in this study. A surgical bone defect with a 7 mm length × 4 mm width × 3 mm depth was created as a model of an alveolar cleft, then the rats were divided randomly into four equal groups each group contained 18 rats: control group (defect only), the membrane group (the defect was covered by the pericardium membrane), the demineralized bone matrix (DBM) group (the defect was filled with DBM guided by pericardium membrane) and fat group (the defect was filled with a fat graft guided by the pericardium membrane).

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Extracellular vesicles (EVs) are shed from the plasma membrane, but the regulation and function of these EVs remain unclear. We found that oxidative stress induced by HO in Hela cells stimulated filopodia formation and the secretion of EVs. EVs were small (150 nm) and labeled for CD44, indicating that they were derived from filopodia.

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Long-chain fatty acids with antimicrobial properties are abundant on the skin and mucosal surfaces, where they are essential to restrict the proliferation of opportunistic pathogens such as Staphylococcus aureus. These antimicrobial fatty acids (AFAs) elicit bacterial adaptation strategies, which have yet to be fully elucidated. Characterizing the pervasive mechanisms used by S.

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Background And Objective: Pericardial Fluid (PF) is a rich reservoir of biologically active factors. Due to its proximity to the heart, the biochemical structure of PF may reflect the pathological changes in the cardiac interstitial environment. This manuscript aimed to determine whether the PF level of cardiac troponins changes in patients undergoing cardiac surgery.

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Khorana score (KS) is an established risk assessment model for predicting cancer-associated thrombosis. However, it ignores several risk factors and has poor predictability in some cancer types. Machine learning (ML) is a novel technique used for the diagnosis and prognosis of several diseases, including cancer-associated thrombosis, when trained on specific diagnostic modalities.

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Background: Duplex or vermiform appendix refers to the presence of an appendix beside the naturally occurring one. Although, duplex appendix emerges from the caecum most of the time, yet it is encountered in other parts of the colon. Inflammation of duplex appendix may represent not only a clinical, but also a surgical dilemma, and this would be confusing further among patients who already had prior appendectomy.

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The global spread of the SARS-CoV-2 pandemic, originating in Wuhan, China, has had profound consequences on both health and the economy. Traditional alignment-based phylogenetic tree methods for tracking epidemic dynamics demand substantial computational power due to the growing number of sequenced strains. Consequently, there is a pressing need for an alignment-free approach to characterize these strains and monitor the dynamics of various variants.

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Staphylococcus epidermidis is a common member of the human skin and nose microbiomes and a frequent cause of invasive infections. Transducing phages accomplish the horizontal transfer of resistance and virulence genes by mispackaging of mobile-genetic elements, contributing to severe, therapy-refractory S. epidermidis infections.

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The mortality risk for individuals with pelvic fractures ranges from 10% to 50%, depending on the severity of the bleeding and the presence of concurrent brain, thorax, and abdomen injuries. This systematic review aims to comprehensively investigate the role of MRI and CT in diagnosing and managing pelvic fractures. PubMed, SCOPUS, Web of Science, and Science Direct were systematically searched for relevant literature.

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Statement Of Problem: Preserving and strengthening the remaining tooth structure of compromised flared root canals after endodontic treatment is challenging.

Purpose: The purpose of this in vitro study was to compare the adaptation of milled polymer- infiltrated ceramic, fiber-reinforced composite resin, and high-performance semicrystalline thermoplastic resin posts as used to restore mandibular premolars with flared root canals.

Material And Methods: Forty sound mandibular premolars were randomly divided into 4 groups: custom Vita Enamic (CV), custom fiber-reinforced composite resin (CF), custom polyetherketoneketone (CP), and prefabricated fiber (RF) posts.

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Antagonistic bacterial interactions often rely on antimicrobial bacteriocins, which attack only a narrow range of target bacteria. However, antimicrobials with broader activity may be advantageous. Here we identify an antimicrobial called epifadin, which is produced by nasal Staphylococcus epidermidis IVK83.

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Article Synopsis
  • Postoperative atrial fibrillation (POAF) affects 20% to 55% of cardiac surgery patients, and machine learning (ML) has been explored as a predictive tool for this condition.
  • A review of existing studies identified 5 relevant studies, which showed POAF incidence rates between 21.5% and 37.1% and tested various ML models, revealing a wide range of sensitivity and specificity.
  • While ML shows promise in identifying risk factors for POAF using clinical and demographic data, its utility is limited due to variability among studies and a lack of external validation.
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Background: Respiratory mucosal host defense relies on the production of secretory IgA (sIgA) antibodies, but we currently lack a fundamental understanding of how sIgA is induced by contact with microbes and how such immune responses may vary between humans. Defense of the nasal mucosal barrier through sIgA is critical to protect from infection and to maintain homeostasis of the microbiome, which influences respiratory disorders and hosts opportunistic pathogens.

Methods: We applied IgA-seq analysis to nasal microbiota samples from male and female healthy volunteers, to identify which bacterial genera and species are targeted by sIgA on the level of the individual host.

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Impaired inflammation and vascularization are common reasons for delayed diabetic wound healing. Nanoparticles (NPs)-in-nanofibers composites can manage diabetic wounds. A multifunctional scaffold was developed based on tadalafil (TDF)-loaded NPs incorporated into polyvinyl alcohol/ extract nanofibers.

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Article Synopsis
  • This study investigated bacteriocin gene clusters (BGCs) in 22 Staphylococcus isolates from various sources (like food, pets, and the environment) known to produce antimicrobial peptides called bacteriocins.* -
  • Researchers found five types of BGCs across 18 of the isolates, with a high prevalence of lanthipeptides, including some novel variants not found in existing databases.* -
  • The study suggests that these bacteriocin-producing Staphylococcus species, particularly coagulase-negative staphylococci, could be promising sources for discovering new bacteriocins.*
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In Alzheimer's disease (AD), reactive astrocytes produce extracellular vesicles (EVs) that affect mitochondria in neurons. Here, we show that Aβ-induced generation of the sphingolipid ceramide by acid sphingomyelinase (A-SMase) triggered proinflammatory cytokine (C1q, TNF-α, IL-1α) release by microglia, which induced the reactive astrocytes phenotype and secretion of EVs enriched with ceramide. These EVs impeded the capacity of neurons to respond to energy demand.

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