Covid-19 Sentry

Contents

• From Preprints
• From Clinical Trials
• From PubMed
• From Patent Search

From Preprints

• SARS-CoV-2 mechanisms of action and impact on human organism, risk factors and potential treatments. An exhaustive survey. -
  Novel COVID-19 is the most considerable health threat the humanity has faced in decades, with global impact also in the social and economic scopes. Moreover, SARS-CoV-2 involves an unprecedented exciting scientific challenge that has focused all efforts on defeating the new coronavirus. Research results are continuously increasing and updating knowledge about the virus and the disease, and understanding the virus characteristics proves essential in order to identify and attack its weak points, as well as uncovering the host reactions to search for treatments. Through this survey we will offer the reader a thorough exposition on how SARS-CoV-2 infects and affects the human organism, the wide set of risk factors that impact the susceptibility to and the course of the disease, related biomarkers, and potential drugs and treatments against the virus host entry, the infection and its consequences. What has been learned over one and a half year is expected to help in facing future global health threats.
  🖺 Full Text HTML: SARS-CoV-2 mechanisms of action and impact on human organism, risk factors and potential treatments. An exhaustive survey.
• The Indirect Effects of Disordered Social Media Use on Stress and Depression via Fear of COVID-19 -
  The 2019 novel coronavirus disease (COVID-19) is a global threat that has negative impacts on individuals’ physical and mental health. Here, we explore if disordered social media use promotes fear of COVID-19, which in turn increases stress and depression in users. The study also explores several risk and protective factors that may affect the relationship between fear of COVID-19 and stress and depression. There were 174 participants that completed an online survey that measured disordered social media use, fear of COVID-19, perceived stress, and depression symptomatology. We found that disordered social media use predicts perceived stress indirectly through fear of COVID-19. Disordered social media use had a direct relationship with depression scores and this relationship is mediated by fear of COVID-19. We also found that the positive relationship between fear of COVID-19 and perceived stress is stronger for older people than younger people. The psychological impact of COVID-19 may be exacerbated by content promoting the fear of COVID-19 that users will be exposed to on social media.
  🖺 Full Text HTML: The Indirect Effects of Disordered Social Media Use on Stress and Depression via Fear of COVID-19
• Targeting of Protein Kinase CK2 Elicits Antiviral Activity on Bovine Coronavirus Infection -
  Coronaviruses constitute a global threat to human population since three highly pathogenic coronaviruses (SARS-CoV, MERS-CoV and SARS-CoV-2) have crossed species to cause severe human respiratory disease. Considering the worldwide emergency status due to the current COVID-19 pandemic, effective pan-coronavirus antiviral drugs are required to tackle the ongoing as well as future (re)emerging virus outbreaks. Protein kinase CK2 has been deemed a promising therapeutic target in COVID-19 supported by its in vitro pharmacologic inhibition and molecular studies on SARS-CoV-2 infected cells. CIGB-325 is a first-in-class synthetic peptide impairing the CK2-mediated signaling whose safety and clinical benefit have been evidenced in Covid-19 and cancer patients after intravenous administration. Here, we explored the putative antiviral effect of CIGB-325 over MDBK cells infected by bovine coronavirus (BCoV) Mebus. Importantly, CIGB-325 inhibited both the cytopathic effect and the number of plaques forming units with a half-inhibitory concentrations IC50 = 3.5 uM and 17.7 uM, respectively. Accordingly, viral protein accumulation at the cytoplasm was clearly reduced by treating BCoV-infected cells with CIGB-325 over time, as determined by immunocytochemistry. Of note, data from pull-down assay followed by western blot and/or mass spectrometry identification revealed physical interaction of CIGB-325 with nucleocapsid (N) protein and a bona fide cellular CK2 substrates. Functional enrichment and network analysis from the CIGB-325 interacting proteins indicated cytoskeleton reorganization and protein folding as the most represented biological processes disturbed by this anti-CK2 peptide. Altogether, our findings not only unveil the direct antiviral activity of CIGB-325 on coronavirus infection but also provide molecular clues underlying such effect. Also, our data reinforce the scientific rationality behind the pharmacologic inhibition of CK2 to treat coronavirus infections.
  🖺 Full Text HTML: Targeting of Protein Kinase CK2 Elicits Antiviral Activity on Bovine Coronavirus Infection
• ROS/RNS balancing, aerobic fermentation regulation and cell cycle control a complex early trait (‘CoV-MAC-TED’) for combating SARS-CoV-2-induced cell reprogramming -
  In a perspective entitled From plant survival under severe stress to anti-viral human defense we raised and justified the hypothesis that transcript level profiles of justified target genes established from in vitro somatic embryogenesis (SE) induction in plants as a reference compared to virus-induced profiles can identify differential virus signatures that link to harmful reprogramming. A standard profile of selected genes named ReprogVirus was proposed for in vitro-scanning of early virus-induced reprogramming in critical primary infected cells/tissues as target trait. For data collection, the ReprogVirus platform was initiated. This initiative aims to identify in a common effort across scientific boundaries critical virus footprints from diverse virus origins and variants as a basis for anti-viral strategy design. This approach is open for validation and extension. In the present study, we initiated validation by experimental transcriptome data available in public domain combined with advancing plant wet lab research. We compared plant-adapted transcriptomes according to RegroVirus complemented by alternative oxidase (AOX) genes during de novo programming under SE-inducing conditions with in vitro corona virus-induced transcriptome profiles. This approach enabled identifying a major complex trait for early de novo programming during SARS-CoV-2 infection, called CoV-MAC-TED. It consists of unbalanced ROS/RNS levels, which are connected to increased aerobic fermentation that links to alpha-tubulin-based cell restructuration and progression of cell cycle. We conclude that anti-viral/anti-SARS-CoV-2 strategies need to rigorously target CoV-MAC-TED in primary infected nose and mouth cells through prophylactic and very early therapeutic strategies. We also discuss potential strategies in the view of the beneficial role of AOX for resilient behavior in plants. Furthermore, following the general observation that ROS/RNS equilibration/redox homeostasis is of utmost importance at the very beginning of viral infection, we highlight that de-stressing disease and social handling should be seen as essential part of anti-viral/anti-SARS-CoV-2 strategies.
  🖺 Full Text HTML: ROS/RNS balancing, aerobic fermentation regulation and cell cycle control a complex early trait (‘CoV-MAC-TED’) for combating SARS-CoV-2-induced cell reprogramming
• Predicted Coronavirus Nsp5 Protease Cleavage Sites in the Human Proteome: A Resource for SARS-CoV-2 Research -
  Background: The coronavirus nonstructural protein 5 (Nsp5) is a cysteine protease required for processing the viral polyprotein and is therefore crucial for viral replication. Nsp5 from several coronaviruses have also been found to cleave host proteins, disrupting molecular pathways involved in innate immunity. Nsp5 from the recently emerged SARS-CoV-2 virus interacts with and can cleave human proteins, which may be relevant to the pathogenesis of COVID-19. Based on the continuing global pandemic, and emerging understanding of coronavirus Nsp5-human protein interactions, we set out to predict what human proteins are cleaved by the coronavirus Nsp5 protease using a bioinformatics approach. Results: Using a previously developed neural network trained on coronavirus Nsp5 cleavage sites (NetCorona), we made predictions of Nsp5 cleavage sites in all human proteins. Structures of human proteins in the Protein Data Bank containing a predicted Nsp5 cleavage site were then examined, generating a list of 92 human proteins with a highly predicted and accessible cleavage site. Of those, 48 are expected to be found in the same cellular compartment as Nsp5. Analysis of this targeted list of proteins revealed molecular pathways susceptible to Nsp5 cleavage and therefore relevant to coronavirus infection, including pathways involved in mRNA processing, cytokine response, cytoskeleton organization, and apoptosis. Conclusions: This study combines predictions of Nsp5 cleavage sites in human proteins with protein structure information and protein network analysis. We predicted cleavage sites in proteins recently shown to be cleaved in vitro by SARS-CoV-2 Nsp5, and we discuss how other potentially cleaved proteins may be relevant to coronavirus mediated immune dysregulation. The data presented here will assist in the design of more targeted experiments, to determine the role of coronavirus Nsp5 cleavage of host proteins, which is relevant to understanding the molecular pathology of SARS-CoV-2 infection.
  🖺 Full Text HTML: Predicted Coronavirus Nsp5 Protease Cleavage Sites in the Human Proteome: A Resource for SARS-CoV-2 Research
• Single domain shark VNAR antibodies neutralize SARS-CoV-2 infection in vitro -
  Single domain shark VNAR antibodies can offer a viable alternative to conventional Ig-based monoclonal antibodies in treating COVID-19 disease during the current pandemic. Here we report the identification of neutralizing single domain VNAR antibodies selected against the SARS-CoV-2 spike protein derived from the Wuhan variant using phage display. We identified 56 unique binding clones that exhibited high affinity and specificity to the spike protein. Of those, 10 showed an ability to block both the spike protein receptor binding domain from the Wuhan variant and the N501Y mutant from interacting with recombinant ACE2 receptor in vitro. In addition, 3 antibody clones retained in vitro blocking activity when the E484K spike protein mutant was used. The inhibitory property of the VNAR antibodies was further confirmed for all 10 antibody clones using ACE2 expressing cells with spike protein from the Wuhan variant. The viral neutralizing potential of the VNAR clones was also confirmed for the 10 antibodies tested using live Wuhan variant virus in in vitro cell infectivity assays. Single domain VNAR antibodies due to their low complexity, small size, unique epitope recognition and formatting flexibility should be a useful adjunct to existing antibody approaches to treat COVID-19.
  🖺 Full Text HTML: Single domain shark VNAR antibodies neutralize SARS-CoV-2 infection in vitro
• In depth analysis of Cyprus-specific mutations of SARS-CoV-2 strains using computational approaches -
  This study aims to characterize SARS-CoV-2 mutations which are primarily prevalent in the Cypriot population. Moreover, using computational approaches, we assess whether these mutations are associated with changes in viral virulence. We utilize genetic data from 144 sequences of SARS-CoV-2 strains from the Cypriot population obtained between March 2020 and January 2021, as well as all data available from GISAID. We combine this with countries’ regional information, such as deaths and cases per million, as well as COVID-19-related public health austerity measure response times. Initial indications of selective advantage of Cyprus-specific mutations are obtained by mutation tracking analysis. This entails calculating specific mutation frequencies within the Cypriot population and comparing these with their prevalence world-wide throughout the course of the pandemic. We further make use of linear regression models to extrapolate additional information that may be missed through standard statistical analysis. We report a single mutation found in the ORF1ab gene (S6059F) that appears to be significantly enriched within the Cypriot population. We further analyse this mutation using regression models to investigate possible associations with increased deaths and cases per million. Moreover, protein structure prediction tools show that the mutation infers a conformational change to the protein that significantly alters its structure when compared to the reference protein. Investigating Cyprus-specific mutations for SARS-CoV-2 can not only lead to important findings from which to battle the pandemic on a national level, but also provide insights into viral virulence worldwide.
  🖺 Full Text HTML: In depth analysis of Cyprus-specific mutations of SARS-CoV-2 strains using computational approaches
• FXa cleaves the SARS-CoV-2 spike protein and blocks cell entry to protect against infection with inferior effects in B.1.1.7 variant -
  The ongoing coronavirus disease 2019 (COVID-19) pandemic is caused by infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Human natural defense mechanisms against SARS-CoV-2 are largely unknown. Serine proteases (SPs) including furin and TMPRSS2 cleave SARS-CoV-2 spike protein, facilitating viral entry. Here, we show that FXa, a SP for blood coagulation, is upregulated in COVID 19 patients compared to non-COVID-19 donors and exerts anti-viral activity. Mechanistically, FXa cleaves the SARS-CoV-2 spike protein, which prevents its binding to ACE2, and thus blocks viral entry. Furthermore, the variant B.1.1.7 with several mutations is dramatically resistant to the anti-viral effect of FXa compared to wild-type SARA-CoV-2 in vivo and in vitro. The anti-coagulant rivaroxaban directly inhibits FXa and facilitates viral entry, whereas the indirect inhibitor fondaparinux does not. In a lethal humanized hACE2 mouse model of SARS-CoV-2, FXa prolonged survival while combination with rivaroxaban but not fondaparinux abrogated this protection. These preclinical results identify a previously unknown SP function and associated anti-viral host defense mechanism and suggest caution in considering direct inhibitors for prevention or treatment of thrombotic complications in COVID-19 patients.
  🖺 Full Text HTML: FXa cleaves the SARS-CoV-2 spike protein and blocks cell entry to protect against infection with inferior effects in B.1.1.7 variant
• Mapping Potential Antigenic Drift Sites (PADS) on SARS-CoV-2 Spike in Continuous Epitope-Paratope Space -
  SARS-CoV-2 mutations with antigenic effects pose a risk to immunity developed through vaccination and natural infection. While vaccine updates for current variants of concern (VOCs) are underway, it is likewise important to prepare for further antigenic mutations as the virus navigates the heterogeneous global landscape of host immunity. Toward this end, a wealth of data and tools exist that can augment existing genetic surveillance of VOC evolution. In this study, we integrate published datasets describing genetic, structural, and functional constraints on mutation along with computational analyses of antibody-spike co-crystal structures to identify a set of potential antigenic drift sites (PADS) within the receptor binding domain (RBD) and N-terminal domain (NTD) of SARS-CoV-2 spike protein. Further, we project the PADS set into a continuous epitope-paratope space to facilitate interpretation of the degree to which newly observed mutations might be antigenically synergistic with existing VOC mutations, and this representation suggests that functionally convergent and synergistic antigenic mutations are accruing across VOC NTDs. The PADS set and synergy visualization serve as a reference as new mutations are detected on VOCs, enable proactive investigation of potentially synergistic mutations, and offer guidance to antibody and vaccine design efforts.
  🖺 Full Text HTML: Mapping Potential Antigenic Drift Sites (PADS) on SARS-CoV-2 Spike in Continuous Epitope-Paratope Space
• Super-cells untangle large and complex single-cell transcriptome networks -
  Single-cell RNA sequencing (scRNA-seq) technologies offer unique opportunities for exploring heterogeneous cell populations. However, in-depth single-cell transcriptomic characterization of complex tissues often requires profiling tens to hundreds of thousands of cells. Such large numbers of cells represent an important hurdle for downstream analyses, interpretation and visualization. Here we develop a network-based coarse-graining framework where highly similar cells are merged into super-cells. We demonstrate that super-cells not only preserve but often improve the results of downstream analyses including visualization, clustering, differential expression, cell type annotation, gene correlation, imputation, RNA velocity and data integration. By capitalizing on the redundancy inherent to scRNA-seq data, super-cells significantly facilitate and accelerate the construction and interpretation of single-cell atlases, as demonstrated by the integration of 1.46 million cells from COVID-19 patients in less than two hours on a standard desktop.
  🖺 Full Text HTML: Super-cells untangle large and complex single-cell transcriptome networks
• The role of the government in increasing MSMEs in Indonesia -
  As we know that economic growth is one indicator of a country’s economic performance. Experts state that small traders are business actors with relatively small capital who carry out production activities or sell goods and services to meet the needs of certain groups in society. From a business development perspective, small traders, such as warungs, street vendors or hawkers, and small-scale shops are micro-enterprises that operate informally. The emergence of the Covid-19 pandemic had a negative impact on 84.7% of MSMEs, the average income fell significantly by 53%, and around 72% of MSMEs experienced a decrease in income of more than 40%. MSMEs have a very large role in the Indonesian economy.
  🖺 Full Text HTML: The role of the government in increasing MSMEs in Indonesia
• Altered neutrophil phenotype and function in non-ICU COVID-19 patients correlated with disease severity -

  Rational: Infection with the SARS-CoV2 virus is associated with elevated neutrophil counts. Evidence of neutrophil dysfunction in COVID-19 is based predominantly on transcriptomics or single functional assays. Cell functions are interwoven pathways, and so understanding the effect of COVID-19 across the spectrum of neutrophil function may identify tractable therapeutic targets. Objectives: Examine neutrophil phenotype and functional capacity in COVID-19 patients versus age-matched controls (AMC) Methods: Isolated neutrophils from 41 hospitalised, non-ICU COVID-19 patients and 23 AMC underwent ex vivo analyses for migration, bacterial phagocytosis, ROS generation, NET formation (NETosis) and cell surface receptor expression. DNAse 1 activity was measured, alongside circulating levels of cfDNA, MPO, VEGF, IL-6 and sTNFRI. All measurements were correlated to clinical outcome. Serial sampling on day 3-5 post hospitalisation were also measured. Results: Compared to AMC, COVID-19 neutrophils demonstrated elevated transmigration (p=0.0397) and NETosis (p=0.0366), but impaired phagocytosis (p=0.0236) associated with impaired ROS generation (p<0.0001). Surface expression of CD54 (p<0.0001) and CD11c (p=0.0008) was significantly increased and CD11b significantly decreased (p=0.0229) on COVID-19 patient neutrophils. COVID-19 patients showed increased systemic markers of NETosis including increased cfDNA (p=0.0153) and impaired DNAse activity (p<0.0.001). MPO (p<0.0001), VEGF (p<0.0001), TNFRI (p<0.0001) and IL-6 (p=0.009) were elevated in COVID-19, which positively correlated with disease severity by 4C score. Conclusion: COVID-19 is associated with neutrophil dysfunction across all main effector functions, with altered phenotype, elevated migration, impaired antimicrobial responses and elevated NETosis. These changes represent a clear mechanism for tissue damage and highlight that targeting neutrophil function may help modulate COVID-19 severity.

  🖺 Full Text HTML: Altered neutrophil phenotype and function in non-ICU COVID-19 patients correlated with disease severity
• A Cross-sectional Study of Clinical COVID-19 Myocarditis -

  Background: COVID-19 myocarditis is becoming increasingly appreciated as a complication of COVID-19. There are significant hurdles to formal diagnosis with endomyocardial biopsy or cardiac MRI whether by resource limitations, patient instability, or isolation precautions. Therefore, further exploratory analysis is needed to clinically define the characteristics and spectrum of severity of COVID-19 myocarditis. Objectives: The aim of this study was to describe the clinical course, echocardiographic, and laboratory testing across suspected fulminant and non-fulminant clinically defined COVID-19 myocarditis. Methods: In a cross-sectional observational study of 19 patients with clinically defined COVID-19 myocarditis, we report presenting symptoms, clinical course, laboratory findings, and echocardiographic results stratified by non-fulminant and fulminant myocarditis. Student t-test and univariate logistic regression are used to compare laboratory findings across fulminant and non-fulminant cases. Findings: Among 19 patients, there was no prior history of coronary artery disease, atrial fibrillation, or heart failure; 21.1% of patients died; and 78.9% of cases required supplemental oxygen. A significantly higher geometric mean D-dimer and ferritin were observed in patients with fulminant compared to non-fulminant suspected myocarditis. 26.3% of cases had pericardial effusions. 10 out of the 16 with available echocardiographic data had normal left ventricular systolic function. Conclusions: In this cross-sectional analysis, we provide a practical clinical depiction of patients with clinical COVID-19 myocarditis across fulminant and non-fulminant cases. Statistically significant elevations in inflammatory markers in fulminant versus non-fulminant cases generate hypothesis regarding the role of systemic inflammation in driving severity of COVID-19 myocarditis.

  🖺 Full Text HTML: A Cross-sectional Study of Clinical COVID-19 Myocarditis
• Seroprevalence of SARS-CoV-2 Antibodies Among Rural Healthcare Workers -

  The objective of this longitudinal cohort study was to determine the seroprevalence of antibodies to severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) in healthcare workers employed at healthcare clinics in three rural counties in eastern South Dakota and western Minnesota from May 13, 2020 through December 22, 2020. Three blood draws were performed at five clinical sites and tested for the presence of antibodies against the SARS-CoV-2 virus. Serum samples were tested for the presence of antibodies using a fluorescent microsphere immunoassay (FMIA), neutralization of SARS-CoV-2 Spike-pseudotyped particles (SARS-CoV-2pp) assay, and serum virus neutralization (SVN) assay. The seroprevalence was determined to be 1/336 (0.29%) for samples collected from 5/13/20-7/13/20, 5/260 (1.92%) for samples collected from 8/13/20-9/25/20, and 35/235 (14.89%) for samples collected from 10/16/20-12/22/20. Eight of the 35 (22.8%) seropositive individuals identified in the final draw did not report a previous diagnosis with COVID-19. There was a high correlation (>90%) among the FMIA and virus neutralization assays. Each clinical site9s seroprevalence was higher than the cumulative incidence for the general public in each respective county as reported by state public health agencies. As of December 2020, there was a high percentage (85%) of seronegative individuals in the study population.

  🖺 Full Text HTML: Seroprevalence of SARS-CoV-2 Antibodies Among Rural Healthcare Workers
• Recognition and inhibition of SARS-CoV-2 by humoral innate immunity pattern recognition molecules -

  The humoral arm of innate immunity includes diverse molecules with antibody-like functions, some of which serve as disease severity biomarkers in COVID-19. The present study was designed to conduct a systematic investigation of the interaction of humoral fluid phase pattern recognition molecules (PRM) with SARS-CoV-2. Out of 10 PRM tested, the long pentraxin PTX3 and Mannose Binding Lectin (MBL) bound the viral Nucleoprotein and Spike, respectively. MBL bound trimeric Spike, including that of variants of concern, in a glycan-dependent way and inhibited SARS-CoV-2 in three in vitro models. Moreover, upon binding to Spike, MBL activated the lectin pathway of complement activation. Genetic polymorphisms at the MBL locus were associated with disease severity. These results suggest that selected humoral fluid phase PRM can play an important role in resistance to, and pathogenesis of, COVID-19, a finding with translational implications.

  🖺 Full Text HTML: Recognition and inhibition of SARS-CoV-2 by humoral innate immunity pattern recognition molecules

From Clinical Trials

• Study of Intravenous COVI-MSC for Treatment of COVID-19-Induced Acute Respiratory Distress - Condition:   Covid19
  Interventions:   Biological: COVI-MSC;   Drug: Placebo
  Sponsor:   Sorrento Therapeutics, Inc.
  Not yet recruiting

• Study of Allogeneic Adipose-Derived Mesenchymal Stem Cells for Treatment of COVID-19 Acute Respiratory Distress - Condition:   Covid19
  Interventions:   Biological: COVI-MSC;   Drug: Placebo
  Sponsor:   Sorrento Therapeutics, Inc.
  Not yet recruiting

• Study to Evaluate a Single Intranasal Dose of STI-2099 (COVI-DROPS™) in Outpatient Adults With COVID-19 (US) - Condition:   Covid19
  Interventions:   Biological: COVI-DROPS;   Drug: Placebo
  Sponsor:   Sorrento Therapeutics, Inc.
  Not yet recruiting

• Study of Allogeneic Adipose-Derived Mesenchymal Stem Cells to Treat Post COVID-19 “Long Haul” Pulmonary Compromise - Condition:   Covid19
  Intervention:   Biological: COVI-MSC
  Sponsor:   Sorrento Therapeutics, Inc.
  Not yet recruiting

• Intramuscular VIR-7831 (Sotrovimab) for Mild/Moderate COVID-19 - Condition:   Covid19
  Intervention:   Biological: VIR-7831
  Sponsors:   Vir Biotechnology, Inc.;   GlaxoSmithKline
  Not yet recruiting

• Collecting Respiratory Sound Samples From Corona Patients to Extend the Diagnostic Capability of VOQX Electronic Stethoscope to Diagnose COVID-19 Patients - Condition:   COVID-19
  Intervention:   Diagnostic Test: Electronic stethoscope
  Sponsor:   Sanolla
  Recruiting

• To Evaluate the Safety and Efficacy of TQ Formula in Covid-19 Participants - Condition:   Covid19
  Intervention:   Drug: Black Seed Oil Cap/Tab
  Sponsor:   Novatek Pharmaceuticals
  Recruiting

• The Burden of COVID-19 Survivorship - Condition:   Covid19
  Intervention:   Other: Exercise Training
  Sponsor:   Mayo Clinic
  Not yet recruiting

• Evaluation of the INDICAID™ COVID-19 Rapid Antigen Test - Condition:   Covid19
  Interventions:   Device: Rapid antigen testing and offsite PCR testing;   Device: Rapid antigen testing and onsite PCR testing
  Sponsor:   University of California, Los Angeles
  Completed

• Detection of SARS-CoV-2 RNA in Coughed Droplets From Patients With COVID-19 - Condition:   Covid19
  Intervention:   Device: PneumoniaCheck
  Sponsors:   Emory University;   Georgia Tech Foundation
  Recruiting

• Epidemiologic Intelligence Network (EpI-Net) to Promote COVID-19 Testing - Condition:   Covid19
  Intervention:   Other: Epi-Net Intervention
  Sponsors:   Ponce Medical School Foundation, Inc.;   Duke University;   Harvard School of Public Health
  Recruiting

• Exploratory Study to Evaluate the Efficacy of RUTI® Against SARS-COV-2 Infection (COVID-19) in Healthcare Workers - Condition:   Covid-19
  Interventions:   Biological: RUTI® vaccine;   Biological: Placebo
  Sponsor:   RUTI Immunotherapeutics S.L.
  Recruiting

• Safety and Efficacy of Exosomes Overexpressing CD24 in Two Doses for Patients With Moderate or Severe COVID-19 - Condition:   Covid19
  Intervention:   Drug: CovenD24
  Sponsors:   Athens Medical Society;   OBCTCD24 Ltd;   Elpen Pharmaceutical Co. Inc.
  Not yet recruiting

• A Clinical Trial of Immunobridging and Lot-to-lot Consistency of COVID-19 Vaccine (Ad5-nCoV) in Different Age Groups. - Condition:   COVID-19
  Interventions:   Biological: Recombinant Novel Coronavirus Vaccine (Adenovirus Type 5 Vector) 0.5ml;   Biological: Recombinant Novel Coronavirus Vaccine (Adenovirus Type 5 Vector) 0.3ml
  Sponsors:   CanSino Biologics Inc.;   Jiangsu Province Centers for Disease Control and Prevention
  Recruiting

• A Global Phase III Clinical Trial of Recombinant COVID- 19 Vaccine (Sf9 Cells) - Condition:   COVID-19
  Interventions:   Biological: Recombinant COVID-19 vaccine (Sf9 cells);   Other: Placebo control
  Sponsors:   WestVac Biopharma Co., Ltd.;   West China Hospital
  Not yet recruiting

From PubMed

• A tale of two diseases: Sarcoidosis, COVID-19 and new therapeutic options with dual RAS inhibition and tetanus-diphtheria vaccine - Sars Cov-2, the pathogen which belongs to the beta coronavirus family that is responsible for COVID-19, uses Angiotensin Converting Enzyme 2 (ACE2) as a receptor, which is responsible for controlling the actions of renin-angiotensin system (RAS). Sars Cov-2 - ACE2 binding leads to a RAS mediated immune response, which targets especially lungs to form ARDS, which in turn, is the most important cause of mortality in COVID-19. CD8^(+) T cell response dominates over CD4^(+) T cell response and…

• Active components in Ephedra sinica Stapf disrupt the interaction between ACE2 and SARS-CoV-2 RBD: potent COVID-19 therapeutic agents - CONCLUSION: These findings suggested that quinoline-2-carboxylic acids in Ephedra sinica could be considered as potential therapeutic agents for COVID-19. Further, this study provided some justification for the ethnomedicinal use of Ephedra sinica for COVID-19.

• Changes in Language Style and Topics in an Online Eating Disorder Community at the Beginning of the Global COVID-19 Pandemic: Observational Study - CONCLUSIONS: While we observed a reduction in discussions about ED symptoms an increase of mental health and treatment-related topics was observed at the same time. This points to a change in the focus of the ED community from promoting potentially harmful weight loss methods to bringing attention to mental health and treatments for ED. These results together with heightened cognitive processing, increased social references, and reduced inhibition of negative emotions detected in discussions…

• SARS-CoV-2 sensing by RIG-I and MDA5 links epithelial infection to macrophage inflammation - SARS-CoV-2 infection causes broad-spectrum immunopathological disease, exacerbated by inflammatory co-morbidities. A better understanding of mechanisms underpinning virus-associated inflammation is required to develop effective therapeutics. Here we discover that SARS-CoV-2 replicates rapidly in lung epithelial cells despite triggering a robust innate immune response through activation of cytoplasmic RNA-sensors RIG-I and MDA5. The inflammatory mediators produced during epithelial cell infection…

• Immunomodulatory role and potential utility of various nutrients and dietary components in SARS-CoV-2 infection - Recently, the outbreak of severe acute respiratory syndrome cornoavirus-2 (SARS-CoV-2), causing coronavirus disease 2019 (COVID-19), has become a great perturbation all around the globe and has many devastating effects on every aspect of life. Apart from the oxygen therapy and extracorporeal membrane oxygenation, Remdesivir and Dexamethasone have been proven to be efficacious against COVID-19, along with various vaccine candidates and monoclonal antibody cocktail therapy for Regeneron. All of…

• Synergistic inhibition of two host factors that facilitate entry of Severe Acute Respiratory Syndrome Coronavirus 2 - Repurposing FDA-approved inhibitors able to prevent infection by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) could provide a rapid path to establish new therapeutic options to mitigate the effects of coronavirus disease 2019 (COVID-19). Proteolytic cleavages of the spike S protein of SARS-CoV-2, mediated by the host cell proteases cathepsin and TMPRSS2, alone or in combination, are key early activation steps required for efficient infection. The PIKfyve kinase inhibitor apilimod…

• SARS-CoV-2 Spreads through Cell-to-Cell Transmission - Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a highly transmissible coronavirus responsible for the global COVID-19 pandemic. Herein we provide evidence that SARS-CoV-2 spreads through cell-cell contact in cultures, mediated by the spike glycoprotein. SARS-CoV-2 spike is more efficient in facilitating cell-to-cell transmission than SARS-CoV spike, which reflects, in part, their differential cell-cell fusion activity. Interestingly, treatment of cocultured cells with endosomal…

• Assessment of nitric oxide (NO) potential to mitigate COVID-19 severity - Novel coronavirus disease by SARS-CoV-2 virus (also known as COVID-19) has emerged as major health concern worldwide. While, there is no specific drugs for treating this infection till date, SARS-CoV-2 had spread to most countries around the globe. Nitric oxide (NO) gas serves as an important signaling molecule having vasodilatory effects as well as anti-microbial properties. Previous studies from the 2004 SARS-CoV infection demonstrated that NO may also help to reduce respiratory tract…

• In-silico evaluation of bioactive compounds from tea as potential SARS-CoV-2 nonstructural protein 16 inhibitors - BACKGROUND AND AIM: A novel coronavirus, called the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has been found to cause COVID-19 in humans and some other mammals. The nonstructural protein 16 (NSP16) of SARS-CoV-2 plays a significant part in the replication of viruses and suppresses the ability of innate immune system to detect the virus. Therefore, inhibiting NSP16 can be a secure path towards identifying a potent medication against SARS-CoV-2. Tea (Camellia sinensis)…

• A metabolic modeling approach reveals promising therapeutic targets and antiviral drugs to combat COVID-19 - In this study we have developed a method based on Flux Balance Analysis to identify human metabolic enzymes which can be targeted for therapeutic intervention against COVID-19. A literature search was carried out in order to identify suitable inhibitors of these enzymes, which were confirmed by docking calculations. In total, 10 targets and 12 bioactive molecules have been predicted. Among the most promising molecules we identified Triacsin C, which inhibits ACSL3, and which has been shown to be…

• SARS-CoV-2 RNAemia and proteomic trajectories inform prognostication in COVID-19 patients admitted to intensive care - Prognostic characteristics inform risk stratification in intensive care unit (ICU) patients with coronavirus disease 2019 (COVID-19). We obtained blood samples (n = 474) from hospitalized COVID-19 patients (n = 123), non-COVID-19 ICU sepsis patients (n = 25) and healthy controls (n = 30). Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) RNA was detected in plasma or serum (RNAemia) of COVID-19 ICU patients when neutralizing antibody response was low. RNAemia is associated with higher…

• Computational details of molecular structure, spectroscopic properties, topological studies and SARS-Cov-2 enzyme molecular docking simulation of substituted triazolo pyrimidine thione heterocycles - Investigation the molecular structure of the system requires a detailed experience in dealing with theoretical computational guides to highlight its important role. Molecular structure of three heterocyclic compounds 8,10-diphenylpyrido[3,2-e][1,2,4]triazolo[4,3-c]pyrimidine-3(2H)-thione (HL), 8-phenyl-10-(p-tolyl)pyrido[3,2-e][1,2,4]triazolo[4,3-c]pyrimidine-3(2H)-thione (CH(3)L) and10-(4-nitrophenyl)-8-phenylpyrido[3,2-e][1,2,4]triazolo[4,3-c]pyrimidine-3(2H)-thione (NO(2)L) was studied at…

• Signal-regulatory protein alpha is an anti-viral entry factor targeting viruses using endocytic pathways - Signal-regulatory protein alpha (SIRPA) is a well-known inhibitor of phagocytosis when it complexes with CD47 expressed on target cells. Here we show that SIRPA decreased in vitro infection by a number of pathogenic viruses, including New World and Old world arenaviruses, Zika virus, vesicular stomatitis virus and pseudoviruses bearing the Machupo virus, Ebola virus and SARS-CoV-2 glycoproteins, but not HSV-1, MLV or mNoV. Moreover, mice with targeted mutation of the Sirpa gene that renders it…

• Identification of novel drug candidates for the inhibition of catalytic cleavage activity of coronavirus 3CL-like protease enzyme - CONCLUSION: Thus, the present study offers two novel chemical entities against coronavirus infections, which can be validated through various biological assays.

• Hepatitis C Virus Protease Inhibitors Show Differential Efficacy and Interactions with Remdesivir for Treatment of SARS-CoV-2 in Vitro - Antivirals targeting SARS-CoV-2 could improve treatment of COVID-19. We evaluated efficacy of clinically relevant hepatitis C virus (HCV) NS3 protease inhibitors (PI) against SARS-CoV-2 and their interactions with remdesivir, the only direct-acting antiviral approved for COVID-19 treatment. HCV PI showed differential potency in short-term treatment assays based on detection of SARS-CoV-2 Spike protein in VeroE6 cells. Linear PI boceprevir, telaprevir and narlaprevir had 50% effective…

From Patent Search

• 폐마스크 밀봉 회수기 - 본 발명은 마스크 착용 후 버려지는 일회용 폐마스크를 비닐봉지에 넣은 후 밀봉하여 배출함으로써, 2차 감염을 예방하고 일반 생활폐기물과 선별 분리 배출하여 환경오염을 방지하는 데 그 목적이 있다. - link

• COST EFFECTIVE PORTABLE OXYGEN CONCENTRATOR FOR COVID-19 - - link

• METHOD OF IDENTIFYING SEVERE ACUTE RESPIRATORY SYNDROME CORONA VIRUS 2 (SARS-COV-2) RIBONUCLEIC ACID (RNA) - - link

• IMPROVEMENTS RELATED TO PARTICLE, INCLUDING SARS-CoV-2, DETECTION AND METHODS THEREFOR - - link

• DEEP LEARNING BASED SYSTEM FOR DETECTION OF COVID-19 DISEASE OF PATIENT AT INFECTION RISK - The present invention relates to Deep learning based system for detection of covid-19 disease of patient at infection risk. The objective of the present invention is to solve the problems in the prior art related to technologies of detection of covid-19 disease using CT scan image processing. - link

• Wiederverwendbare Maske -

  Wiederverwendbare Maske, mit einem Maskenkörper (100), einem Fixierband (300) zum Befestigen des Maskenkörpers (100) an einem menschlichen Gesicht, einer auswechselbaren Schicht (200), die zwischen dem menschlichen Gesicht und dem Maskenkörper (100) angeordnet ist, und einem Fixierteil (400) zum Fixieren der auswechselbaren Schicht auf dem Maskenkörper (100).

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• A COMPREHENSIVE DISINFECTION SYSTEM DURING PANDEMIC FOR PERSONAL ITEMS AND PROTECTIVE EQUIPMENT (PPE) TO SAFEGUARD PEOPLE - The current Covid-19 pandemic has led to an enormous demand for gadgets / objects for personal protection. To prevent the spread of virus, it is important to disinfect commonly touched objects. One of the ways suggested is to use a personal UV-C disinfecting box that is “efficient and effective in deactivating the COVID-19 virus. The present model has implemented the use of a UV transparent material (fused silica quartz glass tubes) as the medium of support for the objects to be disinfected to increase the effectiveness of disinfection without compromising the load bearing capacity. Aluminum foil, a UV reflecting material, was used as the inner lining of the box for effective utilization of the UVC light emitted by the UVC lamps. Care has been taken to prevent leakage of UVC radiation out of the system. COVID-19 virus can be inactivated in 5 minutes by UVC irradiation in this disinfection box - link

• UBIQUITOUS COMPUTING SYSTEM FOR MENTAL HEALTH MONITORING OF PERSON DURING THE PANDEMIC OF COVID-19 - - link

• 一种预判重症新冠肺炎（COVID-19）的标志物及其产品和用途 - 本发明提供了一种预判重症疾病的标志物，所述的预判重症疾病的标志物为S100A12，序列为SEQ ID NO.1，所述的重症疾病为重症新冠肺炎、重症感染中的一种。S100A12基因作为标志物，在预判重症疾病时对全血中的S100A12基因的表达水平进行检测即可，无需对白细胞进行分离，简化检测流程。S100A12的表达水平可以指导感染类疾病包括新冠肺炎重症的预判，从而及早施治，降低病死率，具有很好的临床应用前景。 - link

• 一种新型冠状病毒COVID-19-S1蛋白的表达和纯化方法 - 本发明属于生物技术领域，具体涉及一种新型冠状病毒COVID‑19‑S1蛋白的表达和纯化方法。本发明提供的方法，主要包括构建COVID‑19‑S1蛋白表达质粒、将COVID‑19‑S1蛋白表达质粒转化、培养表达COVID‑19‑S1蛋白、纯化COVID‑19‑S1蛋白等过程。本发明将能在293F细胞中高分泌表达蛋白的信号肽与Kozak区和编码人COVID‑19‑S1蛋白的基因进行重组，来提高目的蛋白的表达量和分泌量。采用本发明提供的方法，可以解决新型冠状病毒COVID‑19‑S1蛋白分泌量低、纯度低的问题，为免疫学快速诊断、制备单抗、开展解析蛋白结构研究等提供物质基础。 - link