Publications by authors named "Rezk N"

Article Synopsis
  • Antimicrobial-resistant pathogens can lead to severe infections, particularly respiratory infections, highlighting the urgent need for new treatments and reliable preclinical evaluation models.
  • The study introduces two non-invasive murine models for acute lung challenges using a technique that minimizes animal discomfort and ensures even distribution of bacterial doses in the lungs.
  • It establishes that the best time for euthanizing mice and collecting organs for analysis is 24 hours post-challenge, requiring specific bacterial concentrations to effectively assess treatment efficacy.
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Ensemble Learning (EL) has been used for almost ten years to classify heart diseases, but it is still difficult to grasp how the "black boxes", or non-interpretable models, behave inside. Predicting heart disease is crucial to healthcare, since it allows for prompt diagnosis and treatment of the patient's true state. Nonetheless, it is still difficult to forecast illness with any degree of accuracy.

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Pseudomonas aeruginosa is denoted as one of the highly threatening bacteria to the public health. It has acquired many virulent factors and resistant genes that make it difficult to control with conventional antibiotics. Thus, bacteriophage therapy (phage therapy) is a proposed alternative to antibiotics to fight against multidrug-resistant P.

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Article Synopsis
  • - The study measured protein levels in 986 individuals to predict the severity of COVID-19, using both protein data and clinical risk factors to build predictive models.
  • - A baseline model using age and sex achieved a prediction accuracy of 65%, but incorporating 92 specific proteins improved this accuracy to 88% in the initial group and maintained 86% in a separate test group.
  • - Findings indicate that early-stage protein measurements can effectively predict COVID-19 severity, highlighting the need for further research to integrate these measurements into clinical practice.
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Article Synopsis
  • This study investigates how severe COVID-19 affects levels of immune-related proteins and their differences based on sex.
  • Researchers analyzed data from 580 patients by measuring 147 immune proteins during the first 14 days of infection to uncover significant differences between severe cases and controls.
  • The findings revealed that 69 proteins differed significantly between groups, and some proteins showed variations between sexes, which could help explain the differing outcomes in COVID-19 severity based on gender.
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Background: Antibiotic-resistant Pseudomonas aeruginosa (P. aeruginosa) is one of the most critical pathogens in wound infections, causing high mortality and morbidity in severe cases. However, bacteriophage therapy is a potential alternative to antibiotics against P.

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Antimicrobial alternatives such as nanoparticles are critically required to tackle bacterial infections, especially with the emerging threat of antibiotic resistance. Therefore, this study aimed to biosynthesize Au-Ag nanoparticles using propolis as a natural reducing agent and investigate their antibacterial activity against antibiotic-resistant Staphylococcus sciuri (S. sciuri), Pseudomonas aeruginosa (P.

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() is one of the most common pathogenic bacteria worldwide. Avian pathogenic (APEC) causes severe systemic disease in poultry (Colibacillosis), and accordingly, has an extreme risk to the poultry industry and public health worldwide. Due to the increased rate of multi-drug resistance among these bacteria, it is necessary to find an alternative therapy to antibiotics to treat such infections.

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Bacteriophages, bacteria-infecting viruses, are considered by many researchers a promising solution for antimicrobial resistance. On the other hand, some phages have shown contribution to bacterial resistance phenomenon by transducing antimicrobial resistance genes to their bacterial hosts. Contradictory consequences of infections are correlated to different phage lifecycles.

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(Background): Multi-drug-resistant (MDR-KP) has steadily grown beyond antibiotic control. Wound infection kills many patients each year, due to the entry of multi-drug resistant (MDR) bacterial pathogens into the skin gaps. However, a bacteriophage (phage) is considered to be a potential antibiotic alternative for treating bacterial infections.

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Background: Thoracoscopy is the "gold standard" diagnostic modality for investigation of suspected pleural malignancy. It is postulated that meticulous assessment of the pleural cavity may be adequate to indicate malignancy through the macroscopic findings of nodules, pleural thickening, and lymphangitis. We attempted to critically assess this practice, by precisely defining objective macroscopic criteria which might differentiate benign from malignant pleural diseases according to intrapleural pattern and anatomical location, and thereby to explore the predilection of abnormalities to specific sites on pleural surfaces.

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Background: Increased vitamin D levels, as reflected by 25-hydroxy vitamin D (25OHD) measurements, have been proposed to protect against COVID-19 based on in vitro, observational, and ecological studies. However, vitamin D levels are associated with many confounding variables, and thus associations described to date may not be causal. Vitamin D Mendelian randomization (MR) studies have provided results that are concordant with large-scale vitamin D randomized trials.

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Purpose: The role of the Sirutin 1 (SIRT1) and MicroRNA-34 a (miR-34a) in endometriosis and the extent to which the miR-34a/SIRT1/p53 signaling pathway is involved in its pathogenesis is unclear, so we aimed to investigate the expression of miRNA 34-a, SIRT1, Forkhead boxO (FoxO-1), p53 and other apoptotic markers in endometrial tissue of women with endometriosis in order to better understand their role and the mechanisms of their actions in the pathogenesis of such disease and if it is related to apoptosis or not.

Methods: Ectopic and eutopic endometriotic tissues were collected from seventy women with endometriosis while normal endometrial tissues were obtained from 40 fertile women without endometriosis and then gene expression of SIRT-1, miR-34a,p53, Bax, Bcl-2, Bcl-xL and FoxO-1 were measured using RT-PCR.

Results: We detected that SIRT-1 and Bcl-xL genes expressions was significantly up-regulated while miRNA34-a,p53, Bax, Bcl-2 and FoxO-1 were down-regulated in endometrial tissue of endometriotic patients compared to that of those without endometriosis.

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To identify circulating proteins influencing Coronavirus Disease 2019 (COVID-19) susceptibility and severity, we undertook a two-sample Mendelian randomization (MR) study, rapidly scanning hundreds of circulating proteins while reducing bias due to reverse causation and confounding. In up to 14,134 cases and 1.2 million controls, we found that an s.

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Background: Thoracoscopy allows visualization of the pleural cavity including diaphragm, visceral pleura, and lungs. It provides the physician with information about the disease extent and it has the ability to get a biopsy from these lesions to differentiate between tumors and fibrotic reactions. This study aims to compare minithoracoscopy and medical thoracoscope in patients with exudative pleural effusion as regards the diagnostic yield, safety, complications, and duration of hospital stay.

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Obesity is considered a chronic inflammatory disease in which the physiological mechanism responsible for reducing inflammation is weakened, prompting low-grade inflammation throughout the body. One of the key stress response systems that is dysregulated in obesity is the heat shock response, which is a critical defense mechanism that is activated in stressful conditions. Obesity is primary to metabolic syndrome (MetS) as it appears to lead to the increase in other MetS risk factors.

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Eighty seven women with benign breast lesion, 120 patients with breast cancer (BC) and one hundred controls were included in the study. Quantification of mtDNA and nDNA was done by qPCR. Global DNA methylation was measured using ELISA.

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Background: Acute paracetamol (PCM) toxicity is a clinical problem; can result in a serious liver injury that finally may progress to acute liver failure. Curcumin (CUR) is a prevalent natural compound that can maintain prooxidant/antioxidant balance and thus can help in liver protection; also, Silymarin (SL) is a traditional antioxidant herb, used to treat liver disorders through scavenging free radicals. This study aimed to illustrate the histological, biochemical and molecular changes induced by acute PCM overdose on rats' liver to elucidate the effectiveness of CUR compared to SL in alleviating such changes.

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Diabetic foot ulcers are one of the most common complications of diabetes with high morbidity and mortality. Negative pressure wound therapy (NPWT) is one of the treatment modalities that facilitates the wound healing process; however, its molecular mechanism remains unclear. The aim of this study was to investigate the mechanism of action of NPWT in the treatment of diabetic foot ulcers via measuring the tissue expression of genes related to the wound healing process.

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Aim: The purpose of this study was development, validation and application of ultra-performance liquid chromatography (UPLC)-ESI-MS/MS method for quantitation of flibanserin in plasma samples.

Method & Results: After extraction of analyte from plasma by diethyl ether, separation was performed on UPLC C column using mobile phase composition of 10 mM ammonium formate-acetonitrile (30:70, v/v) by isocratic elution of 0.3 ml/min.

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Ovarian malignancy is diagnosed in nearly a fourth of a million women internationally every year. Methylation of RASSF1A tumor suppressor gene prompts its inactivation in diseases. In this study, the RASSF1A promoter methylation was detected by methylated-specific PCR and investigated serum RASSF1A protein level through enzyme-linked immunosorbant assay in 160 Egyptian patients with ovarian cancer and 160 healthy controls.

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Ebola hemorrhagic fever is a lethal viral disease transmitted by contact with infected people and animals. Ebola infection represents a worldwide health threat causing enormous mortality rates and fatal epidemics. Major concern is pilgrimage seasons with possible transmission to Middle East populations.

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Objective: To investigate the possible therapeutic effect of spermatogonial stem cells (SSCs) on lead-induced apoptosis and consequently infertility in adult male rats.

Materials And Methods: Sixty-six Sprague Dawley adult male rats were divided into three groups: control group, lead (Pb) acetate exposed group received (20mg Pb/kg) for 3weeks, and SSCs treated group. Each group included twenty-two rats.

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