Search results for "Sars-cov-"
showing 10 items of 1204 documents
Affinity Sensors for the Diagnosis of COVID-19
2021
The coronavirus disease 2019 (COVID-19) outbreak caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was proclaimed a global pandemic in March 2020. Reducing the dissemination rate, in particular by tracking the infected people and their contacts, is the main instrument against infection spreading. Therefore, the creation and implementation of fast, reliable and responsive methods suitable for the diagnosis of COVID-19 are required. These needs can be fulfilled using affinity sensors, which differ in applied detection methods and markers that are generating analytical signals. Recently, nucleic acid hybridization, antigen-antibody interaction, and change of reactive oxyge…
Single-cell RNA Expression of SARS-CoV-2 Cell Entry Factors in Human Endometrium during Preconception
2020
AbstractWe investigated potential SARS-CoV-2 tropism in human endometrium by single-cell RNA-sequencing of viral entry-associated genes in healthy women. Percentages of endometrial cells expressing ACE2, TMPRSS2, CTSB, or CTSL were <2%, 12%, 80%, and 80%, respectively, with 0.7% of cells expressing all four genes. Our findings imply low efficiency of SARS-CoV-2 infection in the endometrium before embryo implantation, providing information to assess preconception risk in asymptomatic carriers.
ASPERGILOSIS PULMONAR INVASIVA EN PACIENTES CON SINDROME DE DISTRÉS RESPIRATORIO POR COVID-19
2021
Resumen Los pacientes con COVID-19 que ingresan en una unidad de cuidados intensivos (UCI), tienen un alto riesgo de desarrollar infecciones secundarias, incluyendo infecciones fungicas invasivas como aspergilosis pulmonar invasiva (API). El objetivo principal fue el analisis de los casos con sospecha de COVID-19 Associated Pulmonary Aspergillosis (CAPA) en nuestra unidad. En estos pacientes realizamos cultivo micologico en el lavado broncoalveolar como metodos de aislamiento de Aspergillus sp. Se siguio el algoritmo AspICU para establecer el diagnostico de API probable. Ademas, considerando tambien relevante la positividad del antigeno de galactomanano. Se confirmo API probable en 3 de ell…
Focus on clinical practice: angiotensin-converting enzyme 2 and corona virus disease 2019: pathophysiology and clinical implications.
2020
: ACE2 receptor has a broad expression pattern in the cellular membrane and provides a protective action against the development of cardiovascular diseases. Recently, this enzyme has become of extreme interest during the pandemic infection of COVID-19 (coronavirus disease 2019). This virus invades alveolar epithelium and cardiomyocytes using ACE2 as a transmembrane receptor. ACE2 is a counter-regulatory peptide that degrades Ang II into Ang 1-7, thereby attenuating the biological effects of the AT1 receptor. The binding between the spike protein of COVID-19 and the enzyme is crucial for the virus to enter the target cells, but whether an increase in ACE2 activity could facilitate the infect…
"GONE WITH THE WIND": The Transitory Effects of COVID-19 on the Gynecological System
2023
The coronavirus disease no longer seems to represent an insurmountable global problem. This is thanks to the advent of coronavirus vaccines, which have alleviated the most serious symptoms associated with this disease. On the other hand, there are still many extrapulmonary symptoms of COVID-19, and among these also those of a gynecological nature. At the moment, there are several questions in this field, one above all concerns the causal link between COVID-19, vaccines and gynecological alterations. Furthermore, another important aspect is represented by the clinical impact of post-COVID-19 gynecological alterations on the female population which, to date, would seem to be mainly due to the…
Use of Yoghurt Enhanced with Volatile Plant Oils Encapsulated in Sodium Alginate to Increase the Human Body’s Immunity in the Present Fight Against S…
2020
(1) Background: The COVID&ndash
Analysis of antibody profile and correlation with disease severity in COVID-19 patients
2021
Antivielu atbildei ir būtiska loma cīņā ar SARS-CoV-2 infekciju un uz to noteikšanu balstās epidemioloģiskie pētījumi, kas ļauj spriest par vīrusa izplatību. Ar pašlaik pieejamo antivielu testu palīdzību var noteikt antivielas pret šī vīrusa S un N proteīniem, bet tās var veidoties arī pret citiem vīrusa antigēniem, taču to prevalence un funkcionālā loma nav zināma. Šajā darbā tika izstrādāts antigēnu mikrorindu tests, kas satur 30 SARS-CoV-2 antigēnus vai to fragmentus un ar tā palīdzību 103 COVID-19 pacientos izpētīta IgG, IgA, IgM un IgE antivielu veidošanās dinamika un prevalence. Rezultāti parādīja, ka pacientiem ar smagu un vidēji smagu slimības gaitu ir ievērojami augstāki IgG, IgA u…
Computational approach to design of aptamers to the receptor binding domain of SARS-CoV-2
2021
The aim of the research. In this work, in silico selection of DNA-aptamers to the receptor-binding domain (RBD) of the SARS-CoV-2 spike protein was performed using molecular modeling methods. Material and methods. A new computational approach to aptamer in silico selection is based on a cycle of simulations, including the stages of molecular modeling, molecular docking, molecular dynamic simulations, and quantum chemical calculations. To verify the obtained calculated results flow cytometry, fluorescence polarization, and small-angle X-ray scattering methods were applied. Results. An initial library consisted of 256 16-mer oligonucleotides was modeled. Based on molecular docking results, th…
Morphogenetic (Mucin Expression) as Well as Potential Anti-Corona Viral Activity of the Marine Secondary Metabolite Polyphosphate on A549 Cells
2020
The mucus layer of the nasopharynx and bronchial epithelium has a barrier function against inhaled pathogens such as the coronavirus SARS-CoV-2. We recently found that inorganic polyphosphate (polyP), a physiological, metabolic energy (ATP)-providing polymer released from blood platelets, blocks the binding of the receptor binding domain (RBD) to the cellular ACE2 receptor in vitro. PolyP is a marine natural product and is abundantly present in marine bacteria. Now, we have approached the in vivo situation by studying the effect of polyP on the human alveolar basal epithelial A549 cells in a mucus-like mucin environment. These cells express mucins as well as the ectoenzymes alkaline phospha…
The Effect of the Covid-19 Lockdown on Air Quality in Three Italian Medium-Sized Cities
2020
Despite the societal and economic impacts of the COVID-19 pandemic, the lockdown measures put in place by the Italian government provided an unprecedented opportunity to increase our knowledge of the effect transportation and industry-related emissions have on the air quality in our cities. This study assessed the effect of reduced emissions during the lockdown period, due to COVID-19, on air quality in three Italian cities, Florence, Pisa, and Lucca. For this study, we compared the concentration of particulate matter PM10, PM2.5, NO2, and O3 measured during the lockdown period, with values obtained in the same period of 2019. Our results show no evidence of a direct relationship between th…