Importance: Limited data are available on COVID-19 vaccine impact in lactating women. Objective: To evaluate the impact of different COVID-19 vaccines on specific anti-SARS-CoV-2 IgA and IgG levels in human milk. Design, Settings and Participants: In this prospective observational study in Spain, 75 lactating women from priority groups receiving vaccination against SARS-CoV-2 were included (January to April 2021). Human milk samples were collected at seven-time points. A group with confirmed SARS-CoV-2 infection (n=19) and a group of women from prepandemic time (n=13) were included. Exposure: mRNA vaccines (BNT162b2 and mRNA-1273) and adenovirus-vectored vaccine (ChAdOx1 nCoV-19). Main Outcome(s) and Measure(s): Presence of IgA and IgG against RBD SARS-CoV-2 in breast milk. Results: Seventy-five vaccinated lactating women [mean age, 34.9±3.7 years] of whom 96% were Caucasic and 92% were health care workers. A total of 417 milk samples were included and vaccine distribution was BioNTech/Pfizer (BNT162b2, n=30), Moderna (mRNA-1273, n=21), and AstraZeneca (ChAdOx1 nCoV-19, n=24). For each vaccine, 7 time points were collected from baseline up to 25 days after the 1st dose and same points were collected for mRNA vaccines 30 days after 2nd dose. A strong reactivity was observed for IgG and IgA after vaccination mainly after the 2nd dose. Presence and the persistence of specific SARS-CoV-2 antibodies in breast milk were dependent on the vaccine-type and, on previous virus exposure. High inter-variability was observed, being relevant for IgA antibodies. IgG levels were significantly higher than those observed in milk from COVID-19 women while IgA levels were lower. Women with previous COVID-19 increased the IgG levels after the 1st dose to a similar level observed in vaccinated women after the 2nd dose. Conclusions and Relevance: Breast milk from vaccinated women contains anti-SARS-CoV-2 IgA and IgG, with highest after the 2nd dose. Levels were dependent on vaccine type and previous exposure to SARS-CoV-2. Previous COVID-19 influenced the vaccine effect after a single dose, which could be especially relevant in the design of vaccination protocols . Further studies are warranted to demonstrate the potential protective role of these antibodies against COVID-19 in infants from vaccinated and infected mothers through breastfeeding.
Abstract: Introduction; COVID-19 (Coronavirus Disease 2019) is a new viral-induced pneumonia caused by infection with a novel coronavirus, SARS CoV2 (Severe Acute Respiratory Syndrome Coronavirus 2). At present there are few proven effective treatments. This early phase experimental medicine protocol describes an overarching and adaptive trial designed to provide safety, pharmacokinetic (PK)/ pharmacodynamic (PD) information and exploratory biological surrogates of efficacy, which may support further development and deployment of candidate therapies in larger scale trials of COVID-19 positive patients. Methods and analysis; DEFINE is an ongoing exploratory multicentre platform, open label, randomised study. COVID-19 positive patients will be recruited from the following cohorts; a) community cases b) hospitalised patients with new changes on a chest x-ray (CXR) or a computed tomography (CT) scan or requiring supplemental oxygen and c) hospitalised patients requiring assisted ventilation. Participants may be recruited from all three of these cohorts, depending on the experimental therapy, its route of administration and mechanism of action. The primary statistical analyses are concerned with the safety of candidate agents as add-on therapy to standard of care in patients with COVID-19. Safety will be assessed using: - Haematological and biochemical safety laboratory investigations. - Physical examination - Vital signs (blood pressure/heart rate/temperature and respiratory rate) - Daily electrocardiogram (ECG) readings - Adverse events The analysis population will consist of (i) all patients randomised to a treatment arm who receive any dose of the study drug and (ii) all patients randomised to the control arm who would also have been eligible to receive a study drug. Secondary analysis will assess the following variables during treatment period 1) the response of key exploratory biomarkers 2) change in WHO ordinal scale and NEWS2 score 3) oxygen requirements 4) viral load 5) duration of hospital stay 6) PK/PD and 7) changes in key coagulation pathways. Ethics and dissemination; The DEFINE trial platform and its initial two treatment and standard of care arms have received full ethical approval from Scotland A REC (20/SS/0066), the MHRA (EudraCT 2020-002230-32) and NHS Lothian and NHS Greater Glasgow and Clyde. The results of each study arm will be published as soon as the treatment arm has finished recruitment, data input is complete and any outstanding patient safety follow-ups have been completed. Depending on the results of these or future arms, data will be shared with larger clinical trial networks, including RECOVERY, and to other partners for rapid roll out in larger patient cohorts.
Several collected data representing the spread of some infectious disease have demonstrated that the spread does not really exhibit homogeneous spread. Clear examples can include the spread of Spanish ‡u and Covid-19. Collected data depicting numbers of daily new infections in the case of Covid-19 from countries like Turkey, Spain show three waves with different spread patterns. A clear indication of crossover behaviors. While modelers have suggested many mathematical models to depicting these behaviors, it becomes clear that their mathematical models cannot really capture the crossover behaviors, especially passage from deterministic resetting to stochastics. Very recently Atangana and Seda have suggested a concept of piecewise modeling consisting in defining a differential operator piece-wisely, the idea was first in chaos and outstanding patterns were captured. In this paper, we extend this concept to the field of epidemiology with the aim to depict waves with different patterns. Due to the novelty of this concept, a different approach to insure the existence and uniqueness of system solutions are presented. A piecewise numerical approach is presented to derive numerical solutions of such models. An illustrative example is presented and compared with collected data from 3 different countries including Turkey, Spain and Czechia. The obtained results let no doubt for us to conclude that this concept is a new window that will help mankind to better understand nature. Keywords: Piecewise modeling, piecewise existence and uniqueness, piecewise numerical scheme, Covid-19 model, fractional operators and stochastic approach.
Aim: We aimed to detect the risk factors for SARS-CoV-2 infection among healthcare workers (HCWs) in 2020, before vaccination era. Methods: We surveyed the SARS-CoV-2 infection among the HCWs in a hospital by screening of antibody levels and detection of viral RNA by reverse transcription polymerase chain reaction (RT-PCR) between May 2020 to December 2020. Occupational and non-occupational potential predictors of disease were surveyed for the HCWs included in this study. Results: Among 1925 personnel in the hospital, 1732 were included to the study with the response rate of 90%. Overall seroprevalence was 15% at the end of 2020, before vaccinations started. In multivariate analysis, being janitorial staff (OR:2.24, CI:1.21-4.14, p=0.011), being medical secretary (OR: 4.17, CI: 2.12-8.18, p<0.001), having at least one household member with COVID-19 diagnosis (OR:8.98, CI: 6.64-12.15, p<0.001) and number of household members >3 (OR:1.67, CI:1.26-2.22, p<0.001) were found to be significantly associated with SARS-CoV-2 infection. Conclusion: By the end of 2020, just before the era of vaccination and variants, seroprevalence was 15% among HCWs. Medical secretary and janitorial staff were under increased risk of SARS-CoV-2 infection. Community-hospital gradient can explain the mode of transmission for infection among HCWs. In the setting of this study, community measures were less strict, whereas hospital infection control was adequate and provided necessary personal protective equipment. Increasing risk in larger households and households with diagnosed COVID-19 patient indicates community acquired transmission of the infection.
Objective: Multiple myeloma (MM)-related morbidity has a profound effect on quality of life (QoL), and immune function, but few studies have prospectively examined the impact of COVID-19 pandemic and attendant vaccination on both immunity and QoL of patients with MM. We aimed to characterise these effects in a prospective cohort study. Design: We initiated a prospective national cohort study of patients with MM from start of the second wave of SARS CoV-2 infections in December 2020 and resultant COVID lockdown in the United Kingdom. We assessed current myeloma status, history of COVID19 symptoms, testing and vaccination including response using the rudystudy.org platform. In addition, healthcare resource use, mental and social well being and loneliness (Lubben scale) from the start of the COVID-19 pandemic were assessed. Participants: We report data from the first one hundred and nine adults with MM who completed the questionnaires and the first round of blood testing in the cohort. Results: Five patients (4.5%) had COVID-19 infection confirmed by history and/or testing (Nucleocapsid antibody). Up to 98% of patients shielded completely or partially during both waves of the pandemic, with 18% of patients consequently changing antimyeloma therapy in the shielding period. Using the Lubben scale, 21/99 (21.2 %) reported social isolation. Using HADS scale 23.1% of patients reported symptoms of mild to moderate anxiety or mild to moderate depression during this period. Humoral immune response (spike ab) tested 3 weeks after first vaccination was detected in 17/28 (60%) patients. Conclusion: Myeloma patients shielded during waves of the pandemic with significant change to therapy, low level natural COVID-19 infection (4%) and social isolation. Humoral response following the first dose of COVID-19 vaccine is lower than that reported in non-myeloma cohorts.
The COVID-19 pandemic identified an urgent need to re-evaluate the provision of spirometry for clinical monitoring. Home spirometry offers the opportunity for real-time disease evaluation without risk of nosocomial infection. To determine the utility of home spirometry in interstitial lung disease (ILD), interim data from the ongoing INJUSTIS study was evaluated. High correlation was observed between home and hospital spirometry at baseline(r=0.89) and three-months(r=0.82). Over 90% of home spirometry values were within Bland-Altman agreement limits at both time points, although frequently underestimated hospital values. Home spirometry is feasible in people with fibrotic ILD.
We developed a genomic surveillance program for real-time monitoring of SARS-CoV-2 variants of concern in Uruguay. Here, we present the first results, including the proposed qPCR-VOC method, the general workflow and the report of the introduction and community transmission of the VOC P.1 in Uruguay in multiple independent events.
The mechanisms that allowed for the SARS-CoV-2 B.1.1.7 variant to rapidly outcompete pre-existing variants in many countries remain poorly characterized. Here, we analyzed viral release, anti-SARS-CoV-2 antibodies and cytokine production in a retrospective series of 427 RTqPCR+ nasopharyngeal swabs collected in COVID-19 patients harbouring either non-B.1.1.7 or B.1.17 variants. We utilized a novel rapid assay, based on S-Fuse-T reporter cells, to quantify infectious SARS-CoV-2. With both non-B.1.1.7 and B.1.1.7 variants, viral titers were highly variable, ranging from 0 to >106 infectious units, and correlated with viral RNA levels. Lateral flow antigenic rapid diagnostic tests (RDTs) were positive in 96% of the samples harbouring infectious virus. About 67 % of individuals carried detectable infectious virus within the first two days after onset of symptoms. This proportion decreased overtime, and viable virus was detected up to 14 days. Samples containing anti-SARS-CoV-2 IgG or IgA did not generally harbour infectious virus. The proportion of individuals displaying viable virus or being RDT-positive was not higher with B.1.1.7 than with non- B.1.1.7 variants. Ct values were slightly but not significantly lower with B.1.1.7. The variant was characterized by a fast decrease of infectivity overtime and a marked release of 17 cytokines (including IFN-b, IP-10, IL-10 and TRAIL). Our results highlight differences between non-B.1.1.7 and B.1.1.7 variants. B.1.1.7 is associated with modified viral decays and cytokine profiles at the nasopharyngeal mucosae during symptomatic infection.
Objective: The aim of this evaluation was to assess the rapid implementation of obstetric telemedicine during the COVID-19 pandemic using the Consolidated Framework in Implementation Research (CFIR) evaluation framework. Study Design: Following one month of telemedicine implementation, obstetric providers at the University of South Florida clinic completed qualitative surveys and in-depth interviews about the implementation of obstetric telemedicine in the clinic guided by the CFIR evaluation framework. Results: Overall, providers considered obstetric telemedicine comparable to traditional in-person clinic visits and acknowledged that they were adequately prepared for the telemedicine implementation. Advantages included the simplicity of implementation, reduced exposure to COVID-19 infection, and convenience factors. Although obstetric telemedicine mostly met patient needs, a lack of access to at-home monitoring devices, physical examinations, reliable internet service, and privacy concerns posed as barriers. Conclusion: The implementation of the obstetric telemedicine care model was deemed a favorable, safe alternative option for patients during the COVID-19 pandemic.
Syndemics or synergies of cooccurring epidemics are widely studies across health and social sciences in recent years. We conducted a meta-knowledge analysis of articles published between 2001 to 2020 in this growing field of academic scholarship. We found a total of 830 articles authored by 3025 authors, mostly from high-income countries. Publications on syndemics are gradually increasing since 2003, with rapid development in 2013. Each article was cited more than 15 times on average, whereas most (n = 604) articles were original studies. Syndemics research focused on several areas, including HIV/AIDS, substance abuse, mental health, gender minority stressors, racism, violence, chronic physical and mental disorders, food insecurity, social determinants of health, and COVID-19. Moreover, biopsychosocial interactions between multiple health problems were studied across medical, anthropological, public health, and other disciplines of science. The limited yet rapidly evolving literature on syndemics informs transdisciplinary interests to understand complex coexisting health challenges in the context of systematic exclusion and structural violence in vulnerable populations. The findings also suggest applications of syndemic theory to evaluate clinical and public health problems, examine the socioecological dynamics of factors influencing health and wellbeing, and use the insights to alleviate health inequities in the intersections of synergistic epidemics and persistent contextual challenges for population health.
Heterologous prime-boost vaccination is of increasing interest for COVID-19 vaccines. Evidence of rare thrombotic events associated with ChAdOx1-nCoV19 (Vaxzevria, ChAdOx) has lead several European countries to recommend a heterologous booster with mRNA vaccines for certain age groups (e.g. persons <60years in Germany), who have already received one dose of ChAdOx, although data on reactogenicity and safety of this vaccination regimen are still missing. Here we report reactogenicity data of homologous BNT162b2 (Comirnaty, BNT) or heterologous ChAdOx/BNT prime-boost immunisations in a prospective observational cohort study of 326 healthcare workers. Reactogenicity of heterologous ChAdOx/BNT booster vaccination was largely comparable to homologous BNT/BNT vaccination and overall well-tolerated. No major differences were observed in the frequency or severity of local reactions after either of the vaccinations. In contrast, notable differences between the regimens were observed for systemic reactions, which were most frequent after prime immunisation with ChAdOx (86%, 95CI: 79-91), and less frequent after homologous BNT/BNT (65%, 95CI: 56-72), or heterologous ChAdOx/BNT boosters (48%, 95CI: 36-59). This interim analysis supports the safety of currently recommended heterologous ChAdOx/BNT prime-boost immunisations with 12-week intervals.
COVID-19 outbreaks have had high mortality in low- and medium-income countries such as Ecuador. Human mobility is an important factor influencing the spread of diseases possibly leading to a high burden of disease at the country level. Drastic control measures, such as complete lockdown are effective epidemic controls, yet in practice, one hopes that a partial shutdown would suffice. It is an open problem to determine how much mobility can be allowed while controlling an outbreak. In this paper, we use statistical models to relate human mobility to the excess death in Ecuador while controlling for demographic factors. The mobility index provided by GRANDATA, based on mobile phone users, represents the change of number of out-of-home events with respect to a benchmark date (March 2nd, the first date the data is available). The study confirms the global trend that more men are dying than expected compared to women, and that people under 30 show less deaths than expected. Specifically, individuals in the age groups younger than 20, we found have their death rate reduced during the pandemic between 22% and 27% of the expected deaths in the absence of COVID-19. The weekly median mobility time series shows a sharp decrease in human mobility immediately after a national lockdown was declared on March 17, 2020 and a progressive increase towards the pre-lockdown level within two months. Relating median mobility to excess death shows a lag in its effect: first, a decrease in mobility in the previous two to three weeks decreases the excess death and more novel, we found that an increase of mobility variability four weeks prior, increases the number of excess deaths.
Emerging SARS-CoV-2 (SC-2) variants with increased infectivity and vaccine resistance are of major concern. Rapid identification of such variants is important for the public health activities and provide valuable data for epidemiological and policy decision making. We developed a multiplex quantitative RT-qPCR (qPCR) assay that can specifically identify and differentiate between the emerging B.1.1.7 and B.1.351 SC-2 variants. In a single assay, we combined four reactions: one that detects SC-2 RNA independently of the strain, one that detects the D3L mutation, which is specific to variant B.1.1.7, and one that detects the 242-244 deletion, which is specific to variant B.1.351. The fourth reaction identifies human RNAseP gene, serving as an endogenous control for RNA extraction integrity. We show that the strain-specific reactions target mutations that are strongly associated with the target variants, and not with other major known variants. The assay specificity was tested against a panel of respiratory pathogens (n=16), showing high specificity towards SC-2 RNA. The assay sensitivity was assessed using both In-vitro transcribed RNA and clinical samples, and was determined to be between 20 and 40 viral RNA copies per reaction. The assay performance was corroborated with Sanger and whole genome sequencing, showing complete agreement with the sequencing results. The new assay is currently implemented in the routine diagnostic work at the Central Virology Laboratory, and may be used in other laboratories to facilitate the diagnosis of these major worldwide circulating SC-2 variants.
ABSTRACT Tests that detect the presence of SARS-CoV-2 antigen in clinical specimens from the upper respiratory tract can provide a rapid means of COVID-19 disease diagnosis and help identify individuals that may be infectious and should isolate to prevent SARS-CoV-2 transmission. This systematic review assesses the diagnostic accuracy of SARS-CoV-2 antigen detection in COVID-19 symptomatic and asymptomatic individuals compared to RT-qPCR, and summarizes antigen test sensitivity using meta-regression. In total, 83 studies were included that compared SARS-CoV-2 rapid antigen lateral flow testing (RALFT) to RT-qPCR for SARS-CoV-2. Generally, the quality of the evaluated studies was inconsistent, nevertheless, the overall sensitivity for RALFT was determined to be 75.0% (95% confidence interval [CI]: 71.0-78.0). Additionally, RALFT sensitivity was found to be higher for symptomatic versus asymptomatic individuals and was higher for a symptomatic population within 7 days from symptom onset (DSO) compared to a population with extended days of symptoms. Viral load was found to be the most important factor for determining SARS-CoV-2 antigen test sensitivity. Other design factors, such as specimen storage and anatomical collection type, also affect the performance of RAFLT. RALFT and RT-qPCR testing both achieve high sensitivity when compared to SARS-CoV-2 viral culture.
Recombinant Hyperimmune Polyclonal Antibody (GIGA-2050) in COVID-19 Patients - Condition: COVID-19
Intervention: Drug: GIGA-2050
Sponsor: GigaGen, Inc.
Not yet recruiting
Study to Evaluate the Effects of RO7496998 (AT-527) in Non-Hospitalized Adult and Adolescent Participants With Mild or Moderate COVID-19 - Condition: COVID-19
Interventions: Drug: RO7496998; Drug: Placebo
Sponsors: Atea Pharmaceuticals, Inc.; Hoffmann-La Roche
Recruiting
A Phase 2 Study of APX-115 in Hospitalized Patients With Confirmed Mild to Moderate COVID-19. - Condition: COVID-19
Interventions: Drug: APX-115; Drug: Placebo
Sponsors: Aptabio Therapeutics, Inc.; Covance
Not yet recruiting
Mix and Match of the Second COVID-19 Vaccine Dose for Safety and Immunogenicity - Condition: COVID-19
Interventions: Biological: mRNA-1273 SARS-CoV-2 vaccine; Biological: BNT162b2; Biological: ChAdOx1-S [recombinant]; Other: 0, 28 day schedule; Other: 0, 112 day schedule
Sponsors: Canadian Immunization Research Network; Canadian Center for Vaccinology; BC Children’s Hospital Research Institute; Children’s Hospital Research Institute of Manitoba; CHU de Quebec-Universite Laval; Ottawa Hospital Research Institute; Northern Alberta Clinical Trials + Research Centre; Ontario Agency for Health Protection and Promotion; University of Toronto; Massachusetts General Hospital
Not yet recruiting
A Study to Evaluate the Safety and Effect of STC3141 Continuous Infusion in Subjects With Severe Corona Virus Disease 2019（COVID-19）Pneumonia - Condition: Severe COVID-19 Pneumonia
Intervention: Drug: STC3141
Sponsors: Grand Medical Pty Ltd.; Trium Clinical Consulting
Not yet 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: Jiangsu Province Centers for Disease Control and Prevention; WestVac Biopharma Co., Ltd.; West China Hospital
Not yet recruiting
The Role of High Dose Co-trimoxazole in Severe Covid-19 Patients - Condition: COVID-19 Pneumonia
Interventions: Drug: Co-trimoxazole; Drug: Placebo
Sponsor: Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh
Not yet recruiting
A Study of Bemcentinib for the Treatment of COVID-19 in Hospitalised Patients - Condition: COVID-19
Interventions: Drug: Bemcentinib; Other: SoC
Sponsor: BerGenBio ASA
Active, not recruiting
The Proof of Concept Phase 2 Study to Evaluate the Safety and Efficacy of Clevudine in Patients With Mild and Moderate COVID-19 - Condition: COVID-19
Interventions: Drug: Clevudine; Drug: Placebo
Sponsor: Bukwang Pharmaceutical
Recruiting
Breathing Effort in Covid-19 Pneumonia: Effects of Positive Pressure, Inspired Oxygen Fraction and Decubitus - Condition: COVID-19 Pneumonia
Intervention: Device: Esophageal catheter
Sponsor: San Luigi Gonzaga Hospital
Recruiting
Lot-to-lot Consistency of an Inactivated SARS-CoV-2 Vaccine for Prevention of COVID-19 in Healthy Adults - Condition: COVID-19
Intervention: Biological: Inactivated SARS-CoV-2 Vaccine (Vero cell）
Sponsor: Sinovac Research and Development Co., Ltd.
Not yet recruiting
A Study to Test Whether BI 767551 Can Prevent COVID-19 in People Who Have Been Exposed to SARS-CoV-2 - Condition: COVID-19
Interventions: Drug: BI 767551 intravenous; Drug: BI 767551 inhalation; Drug: Placebo intravenous; Drug: Placebo inhalation
Sponsor: Boehringer Ingelheim
Not yet recruiting
Using Text Messages to Improve COVID-19 Vaccination Uptake, an RCT. - Condition: Covid19
Intervention: Behavioral: Text message content
Sponsors: Imperial College Healthcare NHS Trust; Central London CCG; Imperial College Health Partners; Institute for Global Health Innovations; The Behavioural Insights Team
Not yet recruiting
The Effect of Vitamin D Supplementation on COVID-19 Recovery - Condition: Covid19
Interventions: Drug: Vit-D 0.2 MG/ML Oral Solution [Calcidol]; Drug: Physiological Irrigating Solution
Sponsors: University of Monastir; Loussaief Chawki; Nissaf Ben Alaya; Cyrine Ben Nasrallah; Manel Ben Belgacem; Hela Abroug; Imen Zemni; Manel Ben fredj; Wafa Dhouib
Completed
Efficacy Study of Phase 1/2 Randomized Interventional Study of SARS-COV-2-Vaccine Candidates Utilizing EUA Dosing - Condition: COVID-19
Intervention: Biological: mRNA-1273
Sponsor: National Institute of Allergy and Infectious Diseases (NIAID)
Not yet recruiting
Discovery of anti-infective adipostatins through bioactivity-guided isolation and heterologous expression of a type III polyketide synthase - Antibiotic resistance and emerging viral pandemics have posed an urgent need for new anti-infective drugs. By screening our microbial extract library against the main protease of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and the notorious ESKAPE pathogens, an active fraction was identified and purified, leading to an initial isolation of adipostatins A (1) and B (2). In order to diversify the chemical structures of adipostatins toward enhanced biological activities, a type III…
Lipopeptide-based pan-CoV fusion inhibitors potently inhibit HIV-1 infection - No abstract
Detection of SARS-CoV-2 genome and whole transcriptome sequencing in Frontal Cortex of COVID-19 patients - SARS-Cov-2 infection is frequently associated with Nervous System manifestations. However, it is not clear how SARS-CoV-2 can cause neurological dysfunctions and which molecular processes are affected in the brain. In this work, we examined the frontal cortex tissue of patients who died of COVID-19 for the presence of SARS-CoV-2, comparing qRT-PCR with ddPCR. We also investigated the transcriptomic profile of frontal cortex from COVID-19 patients and matched controls by RNA-seq analysis to…
Single-dose BNT162b2 mRNA COVID-19 vaccine significantly boosts neutralizing antibody response in health care workers recovering from asymptomatic or mild natural SARS-CoV-2 infection - CONCLUSIONS: A single vaccination in people with mild or asymptomatic previous infection further boosts SARS-CoV-2 humoral immunity to levels higher than those obtained by complete two-vaccination in uninfected subjects.
The ORF8 protein of SARS-CoV-2 mediates immune evasion through down-regulating MHC-iota - COVID-19, caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has become a global pandemic and has claimed over 2 million lives worldwide. Although the genetic sequences of SARS-CoV and SARS-CoV-2 have high homology, the clinical and pathological characteristics of COVID-19 differ significantly from those of SARS. How and whether SARS-CoV-2 evades (cellular) immune surveillance requires further elucidation. In this study, we show that SARS-CoV-2 infection leads to major…
Chemotherapy vs. Immunotherapy in combating nCOVID19: An update - The nCOVID-19 pandemic initiated its course of contagion from the city of Wuhan and now it has spread all over the globe. SARS-CoV-2 is the causative virus and the infection as well as its symptoms are distributed across the multi-organ perimeters. Interactions between the host and virus governs the induction of ‘cytokine storm’ resulting various immunopathological consequences leading to death. Till now it has caused tens of millions of casualties and yet no credible cure has emerged to vision….
Intragastric and atomized administration of canagliflozin inhibit inflammatory cytokine storm in lipopolysaccharide-treated sepsis in mice: A potential COVID-19 treatment - To date, drugs to attenuate cytokine storm in severe cases of Corona Virus Disease 2019 (COVID-19) are not available. In this study, we investigated the effects of intragastric and atomized administration of canagliflozin (CAN) on cytokine storm in lung tissues of lipopolysaccharides (LPS)-induced mice. Results showed that intragastric administration of CAN significantly and widely inhibited the production of inflammatory cytokines in lung tissues of LPS-induced sepsis mice. Simultaneously,…
The interaction of the bioflavonoids with five SARS-CoV-2 proteins targets: An in silico study - Flavonoids have been shown to have antioxidant, anti-inflammatory, anti-proliferative, antibacterial and antiviral efficacy. Therefore, in this study, we choose 85 flavonoid compounds and screened them to determine their in-silico interaction with protein targets crucial for SARS-CoV-2 infection. The five important targets chosen were the main protease (Mpro), Spike receptor binding domain (Spike-RBD), RNA - dependent RNA polymerase (RdRp or Nsp12), non-structural protein 15 (Nsp15) of…
The SARS-CoV-2 SSHHPS Recognized by the Papain-like Protease - Viral proteases are highly specific and recognize conserved cleavage site sequences of ∼6-8 amino acids. Short stretches of homologous host-pathogen sequences (SSHHPS) can be found spanning the viral protease cleavage sites. We hypothesized that these sequences corresponded to specific host protein targets since >40 host proteins have been shown to be cleaved by Group IV viral proteases and one Group VI viral protease. Using PHI-BLAST and the viral protease cleavage site sequences, we searched…
Tocilizumab in COVID-19: a meta-analysis, trial sequential analysis, and meta-regression of randomized-controlled trials - CONCLUSIONS: For hospitalized COVID-19 patients, there is some evidence that tocilizumab use may be associated with a short-term mortality benefit, but further high-quality data are required. Its benefits may also lie in reducing the need for mechanical ventilation.
In silico Studies on the Interaction Between Mpro and PLpro From SARS-CoV-2 and Ebselen, its Metabolites and Derivatives - The COVID-19 pandemic caused by the SARS-CoV-2 has mobilized scientific attention in search of a treatment. The cysteine-proteases, main protease (Mpro) and papain-like protease (PLpro) are important targets for antiviral drugs. In this work, we simulate the interactions between the Mpro and PLpro with Ebselen, its metabolites and derivatives with the aim of finding molecules that can potentially inhibit these enzymes. The docking data demonstrate that there are two main interactions between the…
Anti-IgE monoclonal antibodies as potential treatment in COVID-19 - Coronavirus disease 2019 (COVID-19) is associated with irreversible effects on vital organs, especially the respiratory and cardiac systems. While the immune system plays a key role in the survival of patients to viral infections, in COVID-19, there is a hyperinflammatory immune response evoked by all the immune cells, such as neutrophils, monocytes, and includes release of various cytokines, resulting in an exaggerated immune response, named cytokine storm. This severe, dysregulated immune…
In silico Exploration of Interactions Between Potential COVID-19 Antiviral Treatments and the Pore of the hERG Potassium Channel-A Drug Antitarget - Background: In the absence of SARS-CoV-2 specific antiviral treatments, various repurposed pharmaceutical approaches are under investigation for the treatment of COVID-19. Antiviral drugs considered for this condition include atazanavir, remdesivir, lopinavir-ritonavir, and favipiravir. Whilst the combination of lopinavir and ritonavir has been previously linked to prolongation of the QT(c) interval on the ECG and risk of torsades de pointes arrhythmia, less is known in this regard about…
ACE2 and SARS-CoV-2 Infection Risk: Insights From Patients With Two Rare Genetic Tubulopathies, Gitelman’s and Bartter’s Syndromes - COVID-19 is spreading globally with the angiotensin converting enzyme (ACE)-2 serving as the entry point of SARS-CoV-2 virus. This raised concerns how ACE2 and the Renin-Angiotensin (Ang)-System (RAS) are to be dealt with given their roles in hypertension and their involvement in COVID-19’s morbidity and mortality. Specifically, increased ACE2 expression in response to treatment with ACE inhibitors (ACEi) and Ang II receptor blockers (ARBs) might theoretically increase COVID-19 risk by…
Tranilast: a potential anti-Inflammatory and NLRP3 inflammasome inhibitor drug for COVID-19 - SARS-CoV-2 is a type of beta-CoV that develops acute pneumonia, which is an inflammatory condition. A cytokine storm has been recognized as one of the leading causes of death in patients with COVID-19. ALI and ARDS along with multiple organ failure have also been presented as the consequences of acute inflammation and cytokine storm. It has been previously confirmed that SARS-CoV, as another member of the beta-CoV family, activates NLRP3 inflammasome and consequently develops acute inflammation…
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
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
USE OF IMINOSUGAR COMPOUND IN PREPARATION OF ANTI-SARS-COV-2 VIRUS DRUG - - link
一种高灵敏SARS-CoV-2中和抗体的检测方法、检测试剂盒 - 本发明公开了一种高灵敏SARS‑CoV‑2中和抗体的检测方法、检测试剂盒，属于生物医学检测技术领域，本发明试剂盒包括层析试纸、卡壳和样本稀释液，所述层析试纸包括底板、样品垫、结合垫、NC膜和吸水垫，所述NC膜上依次设置有捕获线、检测线和质控线，所述捕获线包被有ACE2蛋白，所述检测线包被有RBD蛋白，所述结合垫设置有RBD蛋白标记物；本发明采用阻断法加夹心法原理提高检测中和抗体的灵敏度，通过添加捕获线的方式，将靶向RBD的非中和抗体提前捕获，保证后续通过夹心法检测中和抗体的特异性。 - link
逆转录酶突变体及其应用 - 本发明提供一种MMLV逆转录酶突变体，在野生型MMLV逆转录酶氨基酸序列（如SEQ ID No.1序列所示）中进行七个氨基酸位点的突变，氨基酸突变位点为：R205H；V288T；L304K；G525D；S526D；E531G；E574G。该突变体可以降低MMLV逆转录酶对Taq DNA聚合酶的抑制作用，大大提高了一步法RT‑qPCR的灵敏度。 - link
Konstruktion einer elektrochemischen medizinischen Atemmaske (1) für den aktiven Schutz gegen Infektion mit Coronaviren dadurch gekennzeichnet, dass ein elektrochemischer Effekt durch eine allgemein positives Magnetfeld der Maske erzeugbar ist, das die positiv geladenen Coronavirus-Mikroorganismen von der Person vertreibt, indem eine aktive elektrochemische Atemmaske (1) aus einem zweischichtigen Material verwendet wird, umfassend eine äußeren Schicht (2) aus einer hochmolekularen Verbindung aus Bambus in Mischung mit Kupfer-, Silber- oder Goldmetallfasern und einer inneren Schicht (3) aus einem Vliesstoff auf Basis von Polypropylenfasern SMS oder SNS, wobei der Maskenkörper aus zwei in der Mitte der Gesichtssymmetrie genähten Elementen gebildet ist, um die Kontur der Gesichtskurven so weit wie möglich zu wiederholen, ausgestattet mit einem Atemfilter (9) mit einem Einsatz aus zwei Schichten ferromagnetischen Metallgewebes, wobei das Filter (9) hat eine herausnehmbare SMS- oder SNS-Vlieskartusche in einem Kunststoffrand (14) und eine Öse zur Fixierung im Filtergehäuse umfasst, wobei die Maske (1) jeweils einen Nasen- und Kinnbügel aus einem flexiblen Einschubstreifen zwischen den beiden Lagen des Maskengewebes aufweist, die eine Fixierung auf Basis von doppelseitig klebendem Silikonklebeband in den Maskenseitenkanten sowie Nacken- und Kopfbefestigungsschlaufen ermöglichen.