ABSTRACT
Since the first report of the organoselenium compound, ebselen, as a potent inhibitor of the SARS-CoV-2 Mpro main protease by Z. Jin et al. (Nature, 2020), different OSe analogs have been developed and evaluated for their anti-COVID-19 activities. Herein, organoselenium-clubbed Schiff bases were synthesized in good yields (up to 87%) and characterized using different spectroscopic techniques. Their geometries were studied by DFT using the B3LYP/6-311 (d, p) approach. Ten FDA-approved drugs targeting COVID-19 were used as model pharmacophores to interpret the binding requirements of COVID-19 inhibitors. The antiviral efficiency of the novel organoselenium compounds was assessed by molecular docking against the 6LU7 protein to investigate their possible interactions. Our results showed that the COVID-19 primary protease bound to organoselenium ligands with high binding energy scores ranging from -8.19 to -7.33 Kcal/mol for 4c and 4a to -6.10 to -6.20 Kcal/mol for 6b and 6a. Furthermore, the docking data showed that 4c and 4a are good Mpro inhibitors. Moreover, the drug-likeness studies, including Lipinski's rule and ADMET properties, were also assessed. Interestingly, the organoselenium candidates manifested solid pharmacokinetic qualities in the ADMET studies. Overall, the results demonstrated that the organoselenium-based Schiff bases might serve as possible drugs for the COVID-19 epidemic.
ABSTRACT
Introduction Cutibacterium acnes is a Gram-positive anaerobic rod that is part of the normal skin flora, as well as the oral cavity, genitourinary and gastrointestinal tracts. When detected, it is usually considered contaminant;but it is infrequently responsible for invasive infections, mainly neurosurgical and joint infections. It is rarely found as a pathogen responsible for lung infections or empyema. Case report We present a unique case of C. acnes empyema following severe COVID-19, making this the first documented case of empyema due to this bacterium following COVID -19. The microorganism was identified by 16S rRNA gene sequencing. The patient was treated with a combination of antibiotics and surgical intervention. Conclusions This case demonstrates the potential severity of C. acnes empyema. Further studies are needed to establish management guidance.
ABSTRACT
BACKGROUND: Coronavirus disease 2019 (COVID-19) pandemic is an international public health emergency with major disruptions and devastating health consequences resulting from the associated cytokine storm syndrome. The aim of our research was to assess the inflammatory biomarkers and risk factors associated with severity of (COVID-19) patients. METHODS: A cross-sectional study was conducted and included 150 Egyptian patients with COVID-19. Patients were classified into mild, moderate, and severe according to the clinical and CT chest findings. Blood samples were collected from patients for laboratory assessment of inflammatory biomarkers. RESULTS: Our results showed significant negative correlation between oxygen saturation percent and serum levels of inflammatory markers. The correlations were statistically significant with IL-6, CRP, ferritin, LDH, and D-dimer which can be used as sensitive biomarkers for assessment of the risk of severity of infection in COVID 19 patients. CONCLUSIONS: The study revealed that the risk factors associated with severity of COVID 19 infection included older age, male gender, presence of underlying chronic disease, and increased levels of inflammatory biomarkers: CRP, LDH, ferritin, IL-6, and D-dimer.