Background Coronavirus disease 2019 (COVID-19), may progress to respiratory failure requiring invasive mechanical ventilation. Due to ventilator shortage and healthcare systems strain, affordable interventions such as awake prone positioning has been used to improve oxygenation, however, the effect of this intervention on patient-important outcomes is uncertain. The COVI-PRONE trial aims to determine if awake prone positioning in hypoxemic COVID-19 patients reduces the need for invasive mechanical ventilation. Study design A pragmatic, multicenter, international, parallel- group, and stratified randomized controlled trial, aiming to enrol 400 hospitalized adults with COVID-19. Participants The target population is hospitalized adults with confirmed or suspected COVID-19, hypoxemia that requires ≥40% oxygen or ≥ 5 L/min by nasal cannula, and abnormal chest x-ray. We will exclude patients with any of the following: immediate need for intubation; altered mental status; contraindication to prone positioning; hemodynamic instability; body mass index > 40 kg/m2; third trimester pregnancy; do not intubate status; previous enrolment or intubation within the same hospital admission; and prone positioning for more than one day prior to randomization. Study intervention and control Following informed a priori or deferred consent, eligible patients will be centrally randomized to either the intervention arm (prone positioning) or standard of care (no prone positioning). Patients randomized to the prone position will be required to either self-prone or assist-prone for a total of eight to ten hours per day until they meet pre-specified stopping criteria. Study outcomes The primary outcome is invasive mechanical ventilation at 30-days of randomization. Other outcomes include mortality at 60 days, invasive and non-invasive mechanical ventilation free days at 30 days, hospital length of stay at 60 days, days alive and outside of the hospital at 60 days, complications of proning, and serious adverse events.
Background We have assessed the safety and immunogenicity of MVC-COV1901, a recombinant protein vaccine containing prefusion-stabilized spike protein S-2P adjuvanted with CpG 1018 and aluminium hydroxide against COVID-19. Methods This is a phase 2, prospective, double-blinded, placebo-controlled, and multi-centre study to evaluate the safety, tolerability, and immunogenicity of the SARS-CoV-2 vaccine candidate MVC-COV1901. The study comprised 3,844 participants of ≥ 20 years who were generally healthy or with stable pre-existing medical conditions. The study participants were randomly assigned in a 6:1 ratio to receive either MVC-COV1901 containing 15 mcg of S-2P protein or placebo containing saline. Participants received two doses of MVC-COV1901 or placebo, administered 28 days apart via intramuscular injection. The primary outcomes were to evaluate the safety, tolerability, and immunogenicity of MVC- COV1901 from Day 1 (the day of first vaccination) to Day 57 (28 days after the second dose). Immunogenicity of MVC- COV1901 was assessed through geometric mean titres (GMT) and seroconversion rates (SCR) of neutralising antibody and antigen-specific immunoglobulin. This clinical trial is registered at ClinicalTrials.gov: NCT04695652. Findings From the start of this phase 2 trial to the time of interim analysis, no vaccine-related Serious Adverse Events (SAEs) was recorded. The most common solicited adverse events across all study participants were pain at the injection site (64%), and malaise/fatigue (35%). Fever was rarely reported (<1%). For all participants in the MVC-COV1901 group, at 28 days after the second dose against wild type SARS-CoV-2 virus, the GMT was 662.3 (408 IU/mL), the GMT ratio was 163.2, and the seroconversion rate was 99.8%. Interpretation MVC-COV1901 shows good safety profiles and promising immunogenicity responses. The current data supports MVC-COV1901 to enter phase 3 efficacy trials, and could enable regulatory considerations for Emergency Use Authorisation (EUA). Funding Medigen Vaccine Biologics Corporation and Taiwan Centres for Disease Control.
Importance: Whether herd immunity through mass vaccination is sufficient to curb SARS-CoV-2 transmission requires an understanding of the duration of vaccine-induced immunity, and the necessity and timing of booster doses. Objective: To evaluate immune persistence of two priming doses of CoronaVac, and immunogenicity and safety of a third dose in healthy adults ≥60 years. Design, setting, and participants: We conducted a vaccine booster study built on a single-center, randomized, double-blind phase 1/2 trial of the two-dose schedule of CoronaVac among healthy adults≥60 years in Hebei, China. We examined neutralizing antibody titres six months or more after the second dose in all participants. We provided a third dose to 303 participants recruited in phase 2 trial to assess their immune responses. Interventions: Two formulations (3 μg, and 6 μg) were used in phase 1 trial, and an additional formulation of 1.5 μg was used in phase 2 trial. All participants were given two doses 28 days apart and followed up 6 months after the second dose. Participants in phase 2 received a third dose 8 months after the second dose. Main outcomes and measures: Geometric mean titres (GMT) of neutralizing antibodies to live SARS-CoV-2 and adverse events were assessed at multiple time points following vaccination. Results: Neutralizing antibody titres dropped below the seropositive cutoff of 8 at 6 months after the primary vaccination in all vaccine groups in the phase 1/2 trial. A third dose given 8 months or more after the second dose significantly increased neutralizing antibody levels. In the 3 μg group (the licensed formulation), GMT increased to 305 [95%CI 215.3-432.0] on day 7 following the third dose, an approximately 7-fold increase compared with the GMT 28 days after the second dose. All solicited adverse reactions reported within 28 days after a booster dose were of grade 1 or 2 severity. Conclusion and relevance: Neutralizing antibody titres declined substantially six months after two doses of CoronaVac among older adults. A booster dose rapidly induces robust immune responses. This evidence could help policymakers determine the necessity and the timing of a booster dose for older adults. Trial registration: ClinicalTrials.gov (NCT04383574).
Objectives: This cohort study including essential workers, assessed the risk and incidence of SARS-CoV-2 infection during the second surge of COVID-19 according to baseline serostatus and occupational sector. Methods: Essential workers were selected from a seroprevalence survey cohort in Geneva, Switzerland and were linked to a state centralized registry compiling SARS-CoV-2 infections. Primary outcome was the number of virologically-confirmed infections from serological assessment (between May and September 2020) to January 25, 2021, according to baseline antibody status and stratified by three pre-defined occupational groups (occupations requiring sustained physical proximity, involving brief regular contact or others). Secondary outcomes included the incidence of infection. Results: 10457 essential workers were included (occupations requiring sustained physical proximity accounted for 3057 individuals, those involving regular brief contact, 3645, and 3755 workers were classified under ″Other essential occupations″). After a follow-up period of over 27 weeks, 5 (0.6%) seropositive and 830 (8.5%) seronegative individuals had a positive SARS-CoV-2 test, with an incidence rate of 0.2 (95% CI 0.1 to 0.6) and 3.2 (95% CI 2.9 to 3.4) cases per person-week, respectively. Incidences were similar across occupational groups. Seropositive essential workers had a 93% reduction in the hazard (HR of 0.07, 95% CI 0.03 to 0.17) of having a positive test during follow-up with no significant between-occupational group difference. Conclusions: A ten-fold reduction in the hazard of being virologically tested positive was observed among anti-SARS-CoV-2 seropositive essential workers regardless of their sector of occupation, confirming the seroprotective effect of a previous SARS-CoV2 exposure at least six months after infection. Keywords: SARS-CoV-2, COVID-19, Reinfection, Essential workers, Occupation
Background: Tests for SARS-CoV-2 immunity are needed to help assess responses to vaccination, which can be heterogeneous and may wane over time. The plaque reduction neutralization test (PRNT) is considered the gold standard for measuring serum neutralizing antibodies but requires high level biosafety, live viral cultures and days to complete. We hypothesized that competitive enzyme linked immunoassays (ELISAs) based on SARS-CoV-2 spike protein receptor binding domain (RBD) attachment to its host receptor, the angiotensin converting enzyme 2 receptor (ACE2r), would correlate with PRNT, given the central role of RBD-ACE2r interactions in infection and published studies to date, and enable evaluation of vaccine responses. Methods and Findings: Configuration and development of a competitive ELISA with plate- bound RBD and soluble biotinylated ACE2r was accomplished using pairs of pre/post vaccine serum. When the competitive ELISA was used to evaluate N=32 samples from COVID-19 patients previously tested by PRNT, excellent correlation in IC50 results were observed (rs= .83, p < 0.0001). When the competitive ELISA was used to evaluate N=41 vaccinated individuals and an additional N=14 unvaccinated recovered COVID-19 patients, significant differences in RBD-ACE2r inhibitory activity were associated with prior history of COVID-19 and type of vaccine received. In longitudinal analyses pre and up to 200 days post vaccine, surrogate neutralizing activity increased markedly after primary and booster vaccine doses, but fell substantially, up to <12% maximal levels within 6 months. Conclusions: A competitive ELISA based on inhibition of RBD-ACE2r attachment correlates well with PRNT, quantifies significantly higher activity among vaccine recipients with prior COVID (vs. those without), and highlights marked declines in surrogate neutralizing activity over a 6 month period post vaccination. The findings raise concern about the duration of vaccine responses and potential need for booster shots.
Abstract Introduction: The Covid-19 pandemic is disrupting normal life globally. The COVID-19 pandemic is an emerging concern regarding the potential effects during breastfeeding. The aim of this study was to conduct a systemic review of mother- to -child transmission of COVID-19 during breastfeeding. Method: This study systematically searched electronic databases; google scholar, PubMed, Medline, up December 2020. The study was included studies relevant to transmission breast milk and respiratory droplets during breastfeeding of mothers with COVID-19 positive. To identify the quality of data, prism standard was used and Strobe checklist scale. Result: A total of 3160 records were identified in this systemic review with eight relevant studies involving 159 mothers (63 mothers with COVID-19 positive, 55 of their breast milk samples tested negative for the-Covid-19. Twenty-one breast milk samples from 8 women tested positive for Covid-19. Of 73 infants were born to mothers with COVID-19 at the time of delivery. Two infants tested positive for Covid-19. The average mother-child separation time was 36.7 to 21.1 days among mothers confirmed with COVID-19. Out of 22 mothers, ((37.5%) chose to breastfeed their babies after confirm covid-19 positive. Conclusion: This study shown that breastfeeding practices were extremely impacted during the COVID-19 epidemic among both confirmed positive cases and suspected mothers. However, the risk of mother-to-infant transmission of Covid-19 vertically or horizontally, in the perinatal period is very low.
Background: Imbalances in glucose and lipid metabolism in the background of a declining immune system, along with aging, make one prone to glucolipotoxicity-related diseases such as hepatic steatosis and to high risk of infection-related mortality, as with COVID-19, warranting a safe prophylactic measure to help regulate both metabolism and the immune system. Based on the beneficial effects of the AFO-202 strain of black yeast Aureobasidium pullulans- produced beta 1,3-1,6 glucan in balancing of blood glucose and immune enhancement, and that of the N-163 strain of the same species in lipid metabolism and immune modulation, in this pilot study, we have evaluated their specific benefits in healthy human subjects. Methods: Sixteen healthy Japanese male volunteers (aged 40 to 60 years) took part in this clinical trial. They were divided into four groups (n = 4 each): Group I consumed AFO-202 beta glucan (2 sachets of 1 g each per day), IA for 35 days and IB for 21 days; Group II consumed a combination of AFO-202 beta glucan (2 sachets of 1 g each) and N-163 beta glucan (1 sachet of 15 g gel each per day), IIA for 35 days and IIB for 21 days. Investigations for immune stimulation, anti-glycaemic, and anti-cholesterolemia biomarkers were undertaken in all four groups. Results: In terms of metabolic control of glucose, the decrease in HbA1C and glycated albumin (GA) was significantly better in Group I compared with the other groups. Immune enhancement in terms of a significant increase of eosinophils and monocytes and marginal decrease in D-dimer levels, decrease in neutrophil-to-lymphocyte ratio (NLR), with an increase in the lymphocyte-to-CRP ratio (LCR) and leukocyte-to-CRP ratio (LeCR) was observed in Group I. Regulation of lipids by decrease in total and LDL cholesterol was better in Group II, and immunomodulation of coagulation-associated and anti-inflammatory markers by a decrease of CD11b, serum ferritin, galectin-3, fibrinogen was profound in Group II. Conclusion: A. pullulans, a polythermotolerant black yeast - produced AFO-202 beta glucan has balanced blood glucose with marginal immune enhancement in healthy individuals, which when combined with N-163 beta glucan, balanced the lipid profile and immunomodulation. This outcome warrants larger clinical trials to understand the mechanisms and explore the potentials of these safe food supplements in prevention and prophylaxis of diseases due to dysregulated glucose and lipid metabolism, such as fatty liver disease, and infections such as COVID-19 in which a balanced immune activation and immunomodulation are of utmost importance, besides their administration as an adjunct to existing therapeutic approaches of both communicable and non-communicable diseases.
The SARS-CoV-2 pandemic has differentially impacted populations of varied race, ethnicity and socioeconomic status. Admixture mapping and local ancestry inference represent powerful tools to examine genetic risk within multi- ancestry genomes independent of these confounding social constructs. Here, we leverage a pandemic tracking strategy in which we sequence viral and host genomes and transcriptomes from 1,327 nasopharyngeal swab residuals and integrate them with digital phenotypes from electronic health records. We demonstrate over-representation of individuals possessing Oceanian and Indigenous American ancestry in SARS-CoV-2 positive populations. Genome-wide-association disaggregated by admixture mapping reveals regions of chromosomes 5 and 14 associated with COVID19 severity within African and Oceanic local ancestries, respectively, independent of overall ancestry fraction. Phylodynamic tracking of consensus viral genomes reveals no association with disease severity or inferred ancestry. We further present summary data from a multi- omic investigation of human-leukocyte-antigen (HLA) typing, nasopharyngeal microbiome and human transcriptomics that reveal metagenomic and HLA associations with severe COVID19 infection. This work demonstrates the power of multi-omic pandemic tracking and genomic analyses to reveal distinct epidemiologic, genetic and biological associations for those at the highest risk.
The use of chest X-ray images (CXI) to detect Severe Acute Respiratory Syndrome Coronavirus 2 (SARS CoV-2) caused by Coronavirus Disease 2019 (COVID-19) is life-saving important for both patients and doctors. This research proposed a multi-channel feature deep neural network algorithm to screen people infected with COVID-19. The algorithm integrates data oversampling technology and a multi-channel feature deep neural network model to carry out the training process in an end-to-end manner. In the experiment, we used a publicly available CXI database with 10,192 Normal, 6012 Lung Opacity (Non-COVID lung infection), and 1345 Viral Pneumonia images. Compared with traditional deep learning models (Densenet201, ResNet50, VGG19, GoogLeNet), the MFDNN model obtains an average test accuracy of 93.19% in all data. Furthermore, in each type of screening, the precision, recall, and F1 Score of the MFDNN model are also better than traditional deep learning networks. Secondly, compared with the latest CoroDet model, the MFDNN algorithm is 1.91% higher than the CoroDet model in the experiment of detecting the four categories of COVID19 infected persons. Finally, our experimental code will be placed at https://github.com/panliangrui/covid19.
Objective To explore the lived experience of brain fog i.e the wide variety of neurocognitive symptoms that can follow Covid-19. Design and setting UK wide longitudinal qualitative study comprising online interviews and focus groups with email follow-up. Method 50 participants were recruited from a previous qualitative study of the lived experience of long Covid (n = 23) and online support groups for people with persistent neurological problems following Covid-19 (n = 27). In remotely held focus groups, participants were invited to describe their cognitive symptoms and comment on others accounts. Individuals were followed up by email 4-6 months later. Data were audiotaped, transcribed, anonymised and coded in NVIVO. They were analysed by an interdisciplinary team with expertise in general practice, clinical neuroscience, the sociology of chronic illness and service delivery, and checked by three people with lived experience of brain fog. Results 84% of participants were female and 60% were White British ethnicity. Most had never been hospitalised for Covid-19. Qualitative analysis revealed the following themes: mixed views on the appropriateness of the term brain fog; rich descriptions of the experience of neurocognitive impairments (especially executive function, attention, memory and language), accounts of how the illness fluctuated, and in some but not all cases, resolved, over time; the profound psychosocial impact of the condition on relationships, personal and professional identity; self- perceptions of guilt, shame and stigma; strategies used for self-management; challenges accessing and navigating the healthcare system; and participants search for physical mechanisms to explain their symptoms. Conclusion These qualitative findings complement research into the epidemiology and underlying pathophysiological mechanisms for neurological symptoms after Covid-19. Services for such patients should include: an ongoing therapeutic relationship with a clinician who engages with the illness in its personal, social and occupational context as well as specialist services that are accessible, easily navigable, comprehensive, and interdisciplinary.
Although clinical trials and real-world studies have affirmed the effectiveness and safety of the FDA-authorized COVID-19 vaccines, reports of breakthrough infections and persistent emergence of new variants highlight the need to vigilantly monitor the effectiveness of these vaccines. Here we compare the effectiveness of two full-length Spike protein-encoding mRNA vaccines from Moderna (mRNA-1273) and Pfizer/BioNTech (BNT162b2) in the Mayo Clinic Health System over time from January to July 2021, during which either the Alpha or Delta variant was highly prevalent. We defined cohorts of vaccinated and unvaccinated individuals from Minnesota (n = 25,589 each) matched on age, sex, race, history of prior SARS-CoV-2 PCR testing, and date of full vaccination. Both vaccines were highly effective during this study period against SARS-CoV-2 infection (mRNA-1273: 86%, 95%CI: 81-90.6%; BNT162b2: 76%, 95%CI: 69-81%) and COVID-19 associated hospitalization (mRNA-1273: 91.6%, 95% CI: 81-97%; BNT162b2: 85%, 95% CI: 73-93%). However, in July, the effectiveness against infection was considerably lower for mRNA-1273 (76%, 95% CI: 58-87%) with an even more pronounced reduction in effectiveness for BNT162b2 (42%, 95% CI: 13-62%). Notably, the Delta variant prevalence in Minnesota increased from 0.7% in May to over 70% in July whereas the Alpha variant prevalence decreased from 85% to 13% over the same time period. Comparing rates of infection between matched individuals fully vaccinated with mRNA-1273 versus BNT162b2 across Mayo Clinic Health System sites in multiple states (Minnesota, Wisconsin, Arizona, Florida, and Iowa), mRNA-1273 conferred a two-fold risk reduction against breakthrough infection compared to BNT162b2 (IRR = 0.50, 95% CI: 0.39-0.64). In Florida, which is currently experiencing its largest COVID-19 surge to date, the risk of infection in July after full vaccination with mRNA-1273 was about 60% lower than after full vaccination with BNT162b2 (IRR: 0.39, 95% CI: 0.24-0.62). Our observational study highlights that while both mRNA COVID-19 vaccines strongly protect against infection and severe disease, further evaluation of mechanisms underlying differences in their effectiveness such as dosing regimens and vaccine composition are warranted.
Study of Allogeneic Adipose-Derived Mesenchymal Stem Cells to Treat Post COVID-19 “Long Haul” Pulmonary Compromise - Condition: Covid19
Interventions: Biological: COVI-MSC; Biological: Placebo
Sponsor: Sorrento Therapeutics, Inc.
Not yet recruiting
Clinical Trial For Early SARS-CoV-2 (COVID-19) Treatment - Condition: Covid19
Interventions: Drug: Hydroxychloroquine; Drug: Favipiravir; Drug: Favipiravir + Hydroxychloroquine; Drug: Placebo
Sponsor: Health Institutes of Turkey
Completed
Echinacea Drug for Covid-19 - Condition: Covid19
Intervention: Drug: ECHINACEA ARKOPHARMA
Sponsors:
Jesús R. Requena; IDIS; SALUD; Laboratoires Arkopharma
Recruiting
SOLIDARITY Finland Long COVID-19 - Condition: Covid19
Intervention: Drug: Remdesivir
Sponsors:
Clinical Urology and Epidemiology Working Group; University of Helsinki; World Health Organization; Helsinki University Central Hospital; Hyvinkää Hospital; Kanta-Häme Central Hospital; Kuopio University Hospital; Oulu University Hospital; Porvoo Hospital; Seinajoki Central Hospital; Mikkeli Central Hospital; Tampere University Hospital
Recruiting
ACTIV-5 / Big Effect Trial (BET-C) for the Treatment of COVID-19 - Condition: COVID-19
Interventions: Drug: Danicopan; Other: Placebo; Drug: Remdesivir
Sponsor: National Institute of Allergy and Infectious Diseases (NIAID)
Recruiting
Phase I/II Study of COVID-19 DNA Vaccine (AG0302-COVID19 High-dose) - Condition: COVID-19 Lower Respiratory Infection
Interventions: Biological: AG0302-COVID19 for Intramuscular Injection; Biological: AG0302-COVID19 for Intradermal Injection
Sponsors: AnGes, Inc.; Japan Agency for Medical Research and Development
Not yet recruiting
Efficacy of Canrenone as add-on Treatment in Moderate to Severe ARDS in COVID-19 - Condition: COVID-19 Acute Respiratory Distress Syndrome
Intervention:
Drug: Potassium Canrenoate
Sponsors: Fondazione IRCCS Ca’ Granda, Ospedale Maggiore Policlinico; University of Milan; IRCCS Azienda Ospedaliero-Universitaria di Bologna
Not yet recruiting
COVID-19 Administration of Single-Dose Subcutaneous or Intramuscular Anti- Spike(s) SARS-CoV-2 Monoclonal Antibodies Casirivimab and Imdevimab in High-Risk Pediatric Participants Under 12 Years of Age - Condition: COVID-19
Intervention: Drug: casirivimab and imdevimab
Sponsor:
Regeneron Pharmaceuticals
Not yet recruiting
Double Blind Randomized Clinical Trial of Use of Colchicine Added to Standard Treatment in Hospitalized With Covid-19 - Condition: COVID-19 Infection
Intervention: Drug: Colchcine
Sponsor:
Asociacion Instituto Biodonostia
Active, not recruiting
The Efficacy of Nigella Sativa Versus VitaminD3 as Supplement Therapy in Coronavirus Disease 2019 (COVID-19) - Condition: Covid19
Intervention: Dietary Supplement: Nigella Sativa capsule twice daily
Sponsor: Ain Shams University
Recruiting
Efficacy, Immunogenicity and Safety of COVID-19 Vaccine , Inactivated in Children and Adolescents - Condition: COVID-19
Interventions: Biological: Inactivated COVID-19 Vaccine; Biological: Controlled vaccine
Sponsor: Sinovac Research and Development Co., Ltd.
Recruiting
Local and General Immune Response After Coronavirus Disease (COVID-19) Vaccination in Volunteers - Condition: Covid19
Intervention: Procedure: Blood and nasal fluid sampling before and after COVID-19 vaccination
Sponsors: University Hospital, Ghent; University Ghent; Vlaams Instituut voor Biotechnologie
Active, not recruiting
Immunogenicity And Safety of COVID-19 Vaccine , Inactivated Co -Administration With Quadrivalent Influenza Vaccine And 23-valent Pneumococcal Polysaccharide Vaccine - Condition: COVID-19
Interventions: Biological: Experimental Group1; Biological: Experimental Group 2; Biological: Experimental Group 3
Sponsor:
Sinovac Research and Development Co., Ltd.
Not yet recruiting
Advancing DSME/S and COVID-19 Prevention and Protection Through “emPOWERed to Change” Program - Conditions: Type2 Diabetes; Covid19
Intervention: Behavioral: emPOWERed To Change Program
Sponsor: Charles Drew University of Medicine and Science
Not yet recruiting
Effect of Cyproheptadine on Ventilatory Support-free Days in Critically Ill Patients With COVID-19 - Condition: COVID-19 Pneumonia
Intervention: Drug: Cyproheptadine
Sponsor:
Hospital de Clinicas de Porto Alegre
Recruiting
Clinical Efficacy of Remdesivir and Favipiravir in the Treatment of Covid-19 Patients: Scenario So Far - The novel SARS-CoV-2 is a new disease that has caused severe destruction to human lives across the globe, including infection, mortality and financial crises, for which, scientific researchers have been directed towards the development of treatment and controlling measures against coronavirus. Currently, there has been no approved drug for the treatment of the disease, but several antiviral drugs have shown therapeutic effects from which, remdesivir and favipiravir are two such drugs. These…
Lacticaseibacillus paracasei DG enhances the lactoferrin anti-SARS-CoV-2 response in Caco-2 cells - The novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is causing the ongoing global pandemic of coronavirus disease 2019 (COVID-19), which primarily manifests with respiratory distress and may also lead to symptoms associated with the gastrointestinal tract. Probiotics are living microorganisms that have been shown to confer immune benefits. In this study, we investigated the immunomodulatory effects and anti-SARS-CoV-2 activity of three different Lacticaseibacillus probiotic…
Lifestyle-mediated nitric oxide boost to prevent SARS-CoV-2 infection: A perspective - The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has spread worldwide and has seriously threatened public health by causing significant morbidity and mortality. Patients with coronavirus disease (COVID-19) with preexisting endothelial dysfunction caused by aging, diabetes, hypertension, and obesity are at high risk for life- threatening thromboembolic complications. This suggests a possibility that reduced endothelial nitric oxide (NO) production and NO bioavailability could be a…
HD5 and LL-37 Inhibit SARS-CoV and SARS-CoV-2 Binding to Human ACE2 by Molecular Simulation - The coronavirus (COVID-19) pandemic is still spreading all over the world. As reported, angiotensin-converting enzyme-2 (ACE2) is a receptor of SARS-CoV-2 spike protein that initializes viral entry into host cells. Previously, the human defensin 5 (HD5) has been experimentally confirmed to be functional against the SARS-CoV-2. The present study proposes a human cathelicidin known as LL37 that strongly binds to the carboxypeptidase domain of human ACE2 compared to HD5. Therefore, LL37 bears a…
SARS-CoV-2 Infection Remodels the Phenotype and Promotes Angiogenesis of Primary Human Lung Endothelial Cells - SARS-CoV-2-associated acute respiratory distress syndrome (ARDS) and acute lung injury are life-threatening manifestations of severe viral infection. The pathogenic mechanisms that lead to respiratory complications, such as endothelialitis, intussusceptive angiogenesis, and vascular leakage remain unclear. In this study, by using an immunofluorescence assay and in situ RNA-hybridization, we demonstrate the capability of SARS-CoV-2 to infect human primary lung microvascular endothelial cells…
An Evolving Technology That Integrates Classical Methods with Continuous Technological Developments: Thin-Layer Chromatography Bioautography - Thin-layer chromatography (TLC) bioautography is an evolving technology that integrates the separation and analysis technology of TLC with biological activity detection technology, which has shown a steep rise in popularity over the past few decades. It connects TLC with convenient, economic and intuitive features and bioautography with high levels of sensitivity and specificity. In this study, we discuss the research progress of TLC bioautography and then establish a definite timeline to…
Unravelling the Phytochemical Composition and the Pharmacological Properties of an Optimized Extract from the Fruit from Prunus mahaleb L.: From Traditional Liqueur Market to the Pharmacy Shelf - Prunus mahaleb L. fruit has long been used in the production of traditional liqueurs. The fruit also displayed scavenging and reducing activity, in vitro. The present study focused on unravelling peripheral and central protective effects, antimicrobial but also anti-COVID-19 properties exerted by the water extract of P. mahaleb. Anti-inflammatory effects were studied in isolated mouse colons exposed to lipopolysaccharide. Neuroprotection, measured as a blunting effect on…
Copper-Silver Nanohybrids: SARS-CoV-2 Inhibitory Surfaces - The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) remains a severe health threat. The COVID-19 infections occurring in humans and animals render human-animal interfaces hot spots for spreading the pandemic. Lessons from the past point towards the antiviral properties of copper formulations; however, data showing the “contact-time limit” surface inhibitory efficacy of copper formulations to contain SARS-CoV-2 are limited. Here, we show the rapid inhibition of SARS-CoV-2 after only…
Mitochondrial Modulations, Autophagy Pathways Shifts in Viral Infections: Consequences of COVID-19 - Mitochondria are vital intracellular organelles that play an important role in regulating various intracellular events such as metabolism, bioenergetics, cell death (apoptosis), and innate immune signaling. Mitochondrial fission, fusion, and membrane potential play a central role in maintaining mitochondrial dynamics and the overall shape of mitochondria. Viruses change the dynamics of the mitochondria by altering the mitochondrial processes/functions, such as autophagy, mitophagy, and enzymes…
The Good and Bad of Nrf2: An Update in Cancer and New Perspectives in COVID-19 - Nuclear factor erythroid 2-related factor 2 (Nrf2) is a well-known transcription factor best recognised as one of the main regulators of the oxidative stress response. Beyond playing a crucial role in cell defence by transactivating cytoprotective genes encoding antioxidant and detoxifying enzymes, Nrf2 is also implicated in a wide network regulating anti-inflammatory response and metabolic reprogramming. Such a broad spectrum of actions renders the factor a key regulator of cell fate and a…
Boosted Pro-Inflammatory Activity in Human PBMCs by Lipopolysaccharide and SARS-CoV-2 Spike Protein Is Regulated by alpha-1 Antitrypsin - For the treatment of severe COVID-19, supplementation with human plasma-purified α-1 antitrypsin (AAT) to patients is currently considered. AAT inhibits host proteases that facilitate viral entry and possesses broad anti-inflammatory and immunomodulatory activities. Researchers have demonstrated that an interaction between SARS-CoV-2 spike protein (S) and lipopolysaccharides (LPS) enhances pro-inflammatory responses in vitro and in vivo. Hence, we wanted to understand the potential…
SARS-CoV-2 Cellular Entry Is Independent of the ACE2 Cytoplasmic Domain Signaling - Recently emerged severe acute respiratory syndrome coronavirus (SARS-CoV)-1 and -2 initiate virus infection by binding of their spike glycoprotein with the cell-surface receptor angiotensin-converting enzyme 2 (ACE2) and enter into the host cells mainly via the clathrin-mediated endocytosis pathway. However, the internalization process post attachment with the receptor is not clear for both SARS-CoV-1 and -2. Understanding the cellular factor/s or pathways used by these CoVs for internalization…
Plitidepsin: Mechanisms and Clinical Profile of a Promising Antiviral Agent against COVID-19 - Current standard treatment of COVID-19 lacks in effective antiviral options. Plitidepsin, a cyclic depsipeptide authorized in Australia for patients with refractory multiple myeloma, has recently emerged as a candidate anti-SARS- CoV-2 agent. The aim of this review was to summarize current knowledge on plitidepsin’s clinical profile, anti-tumour and anti-SARS-CoV-2 mechanisms and correlate this with available or anticipated, preclinical or clinical evidence on the drug’s potential for COVID-19…
Blue Biotechnology: Computational Screening of Sarcophyton Cembranoid Diterpenes for SARS-CoV-2 Main Protease Inhibition - The coronavirus pandemic has affected more than 150 million people, while over 3.25 million people have died from the coronavirus disease 2019 (COVID-19). As there are no established therapies for COVID-19 treatment, drugs that inhibit viral replication are a promising target; specifically, the main protease (M^(pro)) that process CoV-encoded polyproteins serves as an Achilles heel for assembly of replication-transcription machinery as well as down-stream viral replication. In the search for…
Camellia nitidissima C.W.Chi Caffeine and Chlorogenic acid composition for anti-SARS-CoV-2 and preparation method and application thereof - - link
A Novel Method COVID -19 infection using Deep Learning Based System - - link
A SYSTEM AND METHOD FOR COVID- 19 DIAGNOSIS USING DETECTION RESULTS FROM CHEST X- RAY IMAGES - - link
Mascarilla impermeable - - link
Advanced Machine Learning System combating COVID-19 virus Detection, Spread, Prevention and Medical Assistance. - - link
一种包装重组流感病毒的重组载体和重组流感病毒及其构建方法和应用 - 本发明提供了一种包装重组流感病毒的重组载体和重组流感病毒及其构建方法和应用，涉及生物医药技术领域。本发明利用A型流感病毒八个基因片段为骨架包装出带有新型冠状病毒SARS‑CoV‑2表面刺突蛋白受体结合域（SARS‑CoV‑2_RBD）片段的重组流感病毒，此重组流感病毒可在复制过程中表达具有生物学活性和免疫原性的刺突蛋白受体结合区域RBD。本发明所述重组流感病毒rgH1N1（PR8）‑PA‑RBD可作为重组病毒类药物，用于2019新型冠状病毒肺炎（COVID‑19）的预防；也可作为体外SARS‑COV‑2 RBD等相关抗原表达和体内递呈系统。 - link
Differential detection kit for common SARS-CoV-2 variants in COVID-19 patients - - link
新型冠状病毒B.1.525尼日利亚突变株RBD的基因及其应用 - 本发明属于生物技术领域，具体涉及新型冠状病毒B.1.525尼日利亚突变株RBD的基因及其应用。本发明的新型冠状病毒B.1.525尼日利亚突变株RBD的基因，其核苷酸序列如SEQ ID NO.1或SEQ ID NO.6所示。本发明通过优化野生型新型冠状病毒B.1.525尼日利亚突变株RBD的基因序列，并结合筛选确定了相对最佳序列，优化后序列产生的克隆表达效率比野生型新型冠状病毒B.1.525尼日利亚突变株RBD序列表达效率大幅提高，从而，本发明的新型冠状病毒B.1.525尼日利亚突变株RBD的基因可以用于制备新型冠状病毒疫苗。 - link
一种新型冠状病毒的mRNA疫苗 - 本发明公开了一种新型冠状病毒的mRNA疫苗。本发明提供的疫苗，其活性成分为mRNA，如序列表的序列6所示。本发明还保护TF‑RBD蛋白，如序列表的序列2所示。本发明的发明人通过一系列序列设计和序列优化得到了特异DNA分子，进一步构建了特异重组质粒，将特异重组质粒进行体外转录，可以得到多聚化TF‑RBD mRNA。进一步的，发明人制备了负载TF‑RBD mRNA的脂质纳米粒。本发明对于新型冠状病毒的防控具有重大的应用推广价值。 - link
新型冠状病毒B．1．1．7英国突变株RBD的基因及其应用 - 本发明属于生物技术领域，具体涉及新型冠状病毒B．1．1．7英国突变株RBD的基因及其应用。本发明的新型冠状病毒B．1．1．7英国突变株RBD的基因，其核苷酸序列如SEQ ID NO.1或SEQ ID NO.6所示。本发明通过优化野生型新型冠状病毒B．1．1．7英国突变株RBD的基因序列，并结合筛选确定了相对最佳序列，优化后序列产生的克隆表达效率比野生型新型冠状病毒B．1．1．7英国突变株RBD序列表达效率大幅提高，从而，本发明的新型冠状病毒B．1．1．7英国突变株RBD的基因更有利于用于制备新型冠状病毒疫苗。 - link