Covid-19 Sentry

Contents

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

From Preprints

• Engineered Migrasomes: A Robust, Thermally Stable Vaccination Platform -
  The burgeoning abilities of pathogens and tumor cells to evade immune responses underscore the urgent need for innovative vaccination platforms based on a variety of biological mechanisms. The current logistical challenges associated with cold-chain (i.e. low-temperature) transportation particularly impacts access to vaccines in the global south. We recently discovered organelles called migrasomes, and herein we investigate the potential of migrasomes as an alternative vaccination platform. Their inherent stability and their enrichment with immune-modulating molecules make migrasomes promising candidates, but their low yield presents a hurdle. We address this problem through our engineered migrasome-like vesicles (eMigrasomes), which emulate the biophysical attributes of natural migrasomes with substantially improved yield. We show that eMigrasomes loaded with a model antigen elicit potent antibody responses and maintain stability at room temperature. We demonstrate that eMigrasomes bearing the SARS-CoV-2 Spike protein induce robust humoral protection against the virus. Our study demonstrates the potential of eMigrasome-based vaccines as a unique, robust, and accessible alternative to traditional methods.
  🖺 Full Text HTML: Engineered Migrasomes: A Robust, Thermally Stable Vaccination Platform
• CircRNA-Pro: A Novel Toolkit for High-Precision Detection of Differentially Expressed Circular RNAs and Translatable Circular RNAs -
  With the increasing discovery of circular RNAs (circRNAs) and their critical roles in gene regulation and disease progression, there is a growing need for more accurate and efficient tools for circRNAs research. In response, we have developed an integrated software suite specifically for circRNAs. This all-in-one tool specializes in detecting differentially expressed circRNAs, including those with the potential to be translated into proteins, and allows for comparing against relevant databases, thereby enabling comprehensive circRNA profiling and annotation. To enhance the accuracy in detecting differentially expressed circRNAs, we incorporated three different software algorithms and cross-validated their results through mutual verification. Additionally, this toolkit improves the effectiveness in identifying translatable circRNAs by optimizing Ribo-seq alignment and verifying against public circRNA databases. The performance of circRNA-pro has been evaluated through its application to public RNA-seq and Ribo-seq datasets on breast cancer and SARS-CoV-2 infected cells, and the results obtained have been validated against previous literature and databases. Overall, our integrated toolkit provides a reliable workflow for circRNA research, facilitating insights into their diverse roles across life sciences.
  🖺 Full Text HTML: CircRNA-Pro: A Novel Toolkit for High-Precision Detection of Differentially Expressed Circular RNAs and Translatable Circular RNAs
• Mutability and hypermutation antagonize immunoglobulin codon optimality -
  The efficacy of polyclonal antibody responses is inherently linked to paratope diversity, as generated through V(D)J recombination and somatic hypermutation (SHM). These processes arose in early jawed vertebrates; however, little is known about how immunoglobulin diversity, mutability, and hypermutation have evolved in tandem with another more ubiquitous feature of protein-coding DNA - codon optimality. Here, we explore these relationships through analysis of germline IG genes, natural V(D)J repertoires, serum VH usage, and monoclonal antibody (mAb) expression, each through the lens of multiple optimality metrics. Strikingly, proteomic serum IgG sequencing showed that germline IGHV codon optimality positively correlated with VH representation after influenza vaccination, and in vitro, codon deoptimization of mAbs with synonymous amino acid sequences caused consistent expression loss. Germline V genes exhibit a range of codon optimality that is maintained by functionality, and inversely related to mutability. SHM caused a load-dependent deoptimization of IGH VDJ repertoires within human tonsils, bone marrow, and lymph nodes (including SARS-CoV-2-specific clones from mRNA vaccinees), influenza-infected mice, and zebrafish. Comparison of natural mutation profiles to true random suggests the presence of selective pressures that constrain deoptimization. These findings shed light on immunoglobulin evolution, providing unanticipated insights into the antagonistic relationship between variable region diversification, codon optimality, and antibody secretion; ultimately, the need for diversity takes precedence over that for the most efficient expression of the antibody repertoire.
  🖺 Full Text HTML: Mutability and hypermutation antagonize immunoglobulin codon optimality
• Understanding Young Caring in the UK Pre- and Post-COVID-19: Prevalence, Correlates, and Insights from Three UK Longitudinal Surveys -
  Background. Despite increasing awareness of young carers in recent years, there remains a significant gap in our understanding of both the prevalence and the characteristics of young carers. Our study aims to address this gap by examining the impact of the COVID-19 pandemic on the prevalence and characteristics of young carers. Methods. This research utilised data from three UK longitudinal surveys: the UK Household Longitudinal Study (UKHLS), the COVID Social Mobility and Opportunities (COSMO) study, and the Millennium Cohort Study (MCS). We focused on adolescents aged 16-18, and examined two pre-COVID (UKHLS and MCS) and two post-COVID (UKHLS and COSMO) samples. Results. The prevalence of young carers increased from 8.0% pre-COVID to 9.8-11.9% since COVID. Young carers were more commonly found in single-parent and socioeconomically disadvantaged households, with a higher prevalence of young carers in homes where parents were out of paid employment or held lower educational qualifications. Young carers were also more likely to reside in deprived areas. Most young carers engaged in low-intensity caring (< 10 hours/week), but post-COVID there was an increase in high-intensity caring (10+ hours/week), predominantly assumed by young female carers. The primary recipients of care were parents, followed by grandparents and siblings, with no change in the care recipient type since COVID. Conclusion. This study showed an increase in the prevalence of young carers, particularly those providing high-intensity care, since the onset of the COVID pandemic. Further, young carers were more likely to come from socioeconomically disadvantaged households and areas. Given the potential impacts that young caring can have on young peoples’ lives, it is imperative that support for young carers is increased, particularly for those facing multiple disadvantages. In tandem, services that support adult health and social care need to play a key role in identifying young carers.
  🖺 Full Text HTML: Understanding Young Caring in the UK Pre- and Post-COVID-19: Prevalence, Correlates, and Insights from Three UK Longitudinal Surveys
• Sex differences in symptoms following the administration of BNT162b2 mRNA Covid-19 Vaccine in Children below 5 Years of age in Germany (CoVacU5): a retrospective cohort study -

  Background Sex differences exist not only in the efficacy but also in adverse event rates of many vaccines. Here we compared the safety of BNT162b2 vaccine administered off-label in female and male children younger than 5 years in Germany. Methods This is a retrospective cohort study, in which we performed a post-hoc analysis of a dataset collected through an authentication-based survey of individuals having registered children aged 0-<5 years for vaccination against SARS-CoV-2 in six private practices and/or two lay person-initiated vaccination campaigns. We analyzed the safety profiles of the first 3 doses of 3-10μg BNT162b2. Primary outcome was comparison in frequencies of 4 common post-vaccination symptom categories such as local, general, musculoskeletal symptoms and fever. Data were analyzed according to sex in bivariate analyses and regression models adjusting for age, weight, and dosage. Interaction between sex and BNT162b2 dosage was assessed. An active-comparator analysis was applied to compare post-vaccination symptoms after BNT162b2 versus non-SARS-CoV-2 vaccines. Results The dataset for the present analysis consisted of 7801 participants including 3842 females (49%) and 3977 males (51%) with an age of 3 years (median, interquartile: 2 years). Among individuals receiving 3μg BNT162b2, no sex differences were noted, but after a first dose of 5 or 10μg BNT162b2, local injection-site symptoms were more prevalent in girls compared to boys. In logistic regression, female sex was associated with higher odds of local symptoms, odds ratio (OR) of 1.33 (95% confidence interval [CI]: 1.15-1.55, p<0.05) and general symptoms with OR 1.21 (95% CI: 1.01-1.44, p<0.05). Following non-BNT162b2 childhood vaccinations, female sex was associated with a lower odds of post-vaccination musculoskeletal symptoms (OR: 0.29, 95% CI: 0.11-0.82, p<0.05). An active comparator analysis between BNT162b2 and non-SARS-CoV-2 vaccinations revealed that female sex positively influenced the association between BNT162b2 vaccine type and musculoskeletal symptoms. Conclusions Sex differences exist in post-vaccination symptoms after BNT162b2 administration even in young children. These are of importance for the conception of approval studies, for post-vaccination monitoring and for future vaccination strategies. (German Clinical Trials Register ID: DRKS00028759).

  🖺 Full Text HTML: Sex differences in symptoms following the administration of BNT162b2 mRNA Covid-19 Vaccine in Children below 5 Years of age in Germany (CoVacU5): a retrospective cohort study
• Clinical phenotypes and outcomes associated with SARS-CoV-2 Omicron variant JN.1 in critically ill COVID-19 patients: a prospective, multicenter cohort study -

  A notable increase in severe cases of COVID-19, with significant hospitalizations due to the emergence and spread of JN.1 was observed worldwide in late 2023 and early 2024. During the study period (November 2022-January 2024), 56 JN.1- and 126 XBB-infected patients were prospectively enrolled in 40 French intensive care units. JN.1-infected patients were more likely to be obese (35.7% vs 20.8%; p=0.033) and less frequently immunosuppressed than others (20.4% vs 41.4%; p=0.010). JN.1-infected patients required invasive mechanical ventilation support in 29.1%, 87.5% of them received dexamethasone, 14.5% tocilizumab and none received monoclonal antibodies. Day-28 mortality of JN.1-infected patients was 14.6%.

  🖺 Full Text HTML: Clinical phenotypes and outcomes associated with SARS-CoV-2 Omicron variant JN.1 in critically ill COVID-19 patients: a prospective, multicenter cohort study
• EpidemicKabu a new method to identify epidemic waves and their peaks and valleys -

  INTRODUCTION: The dynamical behavior of epidemic curves is an oscillation between a very low and very high number of incident cases throughout the time. These oscillations are commonly called waves of the epidemic curve. The concept of epidemic waves lacks a consensual definition and a simple methodology that can be used for many diseases. OBJECTIVE: We describe in this study the EpidemicKabu method to identify the start and the end of past epidemic waves but also their peaks and valleys. METHOD: The methodology is divided into processing of the curve, waves detection, and peaks and valleys delimitation. For processing the curve, a Gaussian kernel was used to diminish the noise and to smooth the curve. The first and second derivatives of the curve were used for the detection of waves, delimitation of peaks and valleys. The methodology was derived into the open access library. The method was tested using COVID-19 daily cases reported between 2020 and 2022 for different countries. After detection of waves, we made some measures related to the size of the waves for those countries. RESULTS: The results of the method were the dates of start and end of waves, peaks, and valleys. The dates are displayed on graphs and added as a new column in a dataset. We found that Belgium was the country recording the highest ratio of incident cases per 100 people by day in a wave. CONCLUSION: The EpidemicKabu method is simple, easy to use, and very useful in estimating epidemic waves. The methodology requires expert judgment in order to set a parameter that could only have three possible values.

  🖺 Full Text HTML: EpidemicKabu a new method to identify epidemic waves and their peaks and valleys
• The PRIME-NL study: evaluating a complex healthcare intervention for people with Parkinson’s disease in a dynamic environment -

  Background: An innovative, integrative care model for people with Parkinson (PRIME Parkinson) has gradually been implemented in a selected region of the Netherlands since 2021. A prospective evaluation of this model (PRIME-NL study) was initiated in parallel, spanning the year prior to implementation (baseline) and the implementation period. Following publication of the original study protocol, the COVID-19 crisis delayed implementation of the full PRIME Parkinson care model by two years and hampered the recruitment of study participants. Objective: To describe which methodological adjustments were made to the study protocol because of these developments. Methods: We compare various outcomes between a region where PRIME Parkinson care was implemented (innovation region) versus the rest of the Netherlands (usual care region). We use healthcare claims data of virtually all people with Parkinson in the Netherlands and annual questionnaires in a representative subsample of 984 people with Parkinson, 566 caregivers and 192 healthcare professionals. Four major methodological adjustments had to be made since publication of the original protocol. First, we extended the evaluation period by two years. Second, we incorporated annual process measures of the stage of implementation of the new care model. Third, we introduced a real-time iterative feedback loop of interim results to relevant stakeholders. Fourth, we updated the statistical analysis plan. Discussion: This manuscript provides transparency in how the design and analyses of the evaluation study had to be adapted to control for external influences in a dynamic environment, including eruption of the COVID-19 crisis. Our solutions could serve as a template for evaluating other complex healthcare interventions in a dynamic environment.

  🖺 Full Text HTML: The PRIME-NL study: evaluating a complex healthcare intervention for people with Parkinson’s disease in a dynamic environment
• The association between prolonged SARS-CoV-2 symptoms and work outcomes -

  While the early effects of the COVID-19 pandemic on the United States labor market are well-established, less is known about the long-term impact of SARS-CoV-2 infection and Long COVID on employment. To address this gap, we analyzed self-reported data from a prospective, national cohort study to estimate the effects of SARS-CoV-2 symptoms at three months post-infection on missed workdays and return to work. The analysis included 2,939 adults in the Innovative Support for Patients with SARS-CoV-2 Infections Registry (INSPIRE) study who tested positive for their initial SARS-CoV-2 infection at the time of enrollment, were employed before the pandemic, and completed a baseline and three-month electronic survey. At three months post-infection, 40.8% of participants reported at least one SARS-CoV-2 symptom and 9.6% of participants reported five or more SARS-CoV-2 symptoms. When asked about missed work due to their SARS-CoV-2 infection at three months, 7.1% of participants reported missing >=10 workdays and 13.9% of participants reported not returning to work since their infection. At three months, participants with >=5 symptoms had a higher adjusted odds ratio (aOR) of missing >=10 workdays (2.96, 95% CI 1.81-4.83) and not returning to work (2.44, 95% CI 1.58-3.76) compared to those with no symptoms. Prolonged SARS-CoV-2 symptoms were common, affecting 4-in-10 participants at three-months post-infection, and were associated with increased odds of work loss, most pronounced among adults with >=5 symptoms at three months. Despite the end of the Federal COVID-19 Public Health Emergency and efforts to “return to normal”, policymakers must consider the clinical and economic implications of the COVID-19 pandemic on people’s employment status and work absenteeism, particularly as data characterizing the numerous health and well-being impacts of Long COVID continue to emerge. Improved understanding of risk factors for lost work time may guide efforts to support people in returning to work.

  🖺 Full Text HTML: The association between prolonged SARS-CoV-2 symptoms and work outcomes
• Tight Fit of the SIR Dynamic Epidemic Model to Daily Cases of COVID-19 Reported During the 2021-2022 Omicron Surge in New York City: A Novel Approach -

  We describe a novel approach to recovering the underlying parameters of the SIR dynamic epidemic model from observed data on case incidence. We formulate a discrete-time approximation to the original continuous-time model and search for the parameter vector that minimizes the standard least squares criterion function. We show that the gradient vector and matrix of second-order derivatives of the criterion function with respect to the parameters adhere to their own systems of difference equations and thus can be exactly calculated iteratively. Applying our new approach, we estimated a four-parameter SIR model from data on daily reported cases of COVID-19 during the SARS-CoV-2 Omicron/BA.1 surge of December 2021 - March 2022 in New York City. The estimated SIR model showed a tight fit to the observed data, but less so when we excluded residual cases attributable to the Delta variant during the initial upswing of the wave in December. Our analyses of both the real-world COVID-19 data and simulated case incidence data revealed an important problem of weak parameter identification. While our methods permitted separate estimation of the infection transmission parameter and the infection persistence parameter, only a linear combination of these two key parameters could be estimated with precision. The SIR model appears to be an adequate reduced-form description of the Omicron surge, but it is not necessarily the correct structural model. Prior information above and beyond case incidence data may be required to sharply identify the parameters and thus distinguish between alternative epidemic models.

  🖺 Full Text HTML: Tight Fit of the SIR Dynamic Epidemic Model to Daily Cases of COVID-19 Reported During the 2021-2022 Omicron Surge in New York City: A Novel Approach
• Into the Unknown - Conceptualizing Citizens’ Experiences of Uncertainty in Citizen-state Interactions -
  It is often argued that uncertainty is an inherent characteristic of citizen‒state interactions. It is therefore hardly surprising that many scholars of street-level bureaucracy have studied how frontline workers cope with and make discretionary decisions under uncertain conditions. However, citizens’ experiences of uncertainty have received limited attention in the street-level bureaucracy literature. This article argues that understanding citizens’ experiences of uncertainty is highly relevant because experiences of uncertainty are likely to affect mental wellbeing of individuals negatively. The article seeks to address this gap by building a conceptual framework for understanding and analyzing citizens’ experiences with uncertainty in state–citizen interactions based on theoretical insights from the existing literature and in-depth qualitative analysis of 20 narrative interviews with former COVID-19 patients and their relatives concerning their encounter with health authorities. The article proposes a conceptual framework that distinguishes between epistemic uncertainty and moral uncertainty. Epistemic uncertainty concerns uncertainty about empirical facts or knowledge. Moral uncertainty concerns uncertainty about values due to conflicting or competing norms and values. The article illustrates how these forms of uncertainty may arise before, during, and after citizens’ interaction with frontline workers.
  🖺 Full Text HTML: Into the Unknown - Conceptualizing Citizens’ Experiences of Uncertainty in Citizen-state Interactions
• Changes in total charge on spike protein of SARS-CoV-2 in emerging lineages -
  Motivation: Charged amino acid residues on the spike protein of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) have been shown to influence its binding to different cell surface receptors, its non-specific electrostatic interactions with the environment, and its structural stability and conformation. It is therefore important to obtain a good understanding of amino acid mutations that affect the total charge on the spike protein which have arisen across different SARS-CoV-2 lineages during the course of the virus’ evolution. Results: We analyse the change in the number of ionizable amino acids and the corresponding total charge on the spike proteins of almost 2200 SARS-CoV-2 lineages that have emerged over the span of the pandemic. Our results show that the previously observed trend toward an increase in the positive charge on the spike protein of SARS-CoV-2 variants of concern has essentially stopped with the emergence of the early omicron variants. Furthermore, recently emerged lineages show a greater diversity in terms of their composition of ionizable amino acids. We also demonstrate that the patterns of change in the number of ionizable amino acids on the spike protein are characteristic of related lineages within the broader clade division of the SARS-CoV-2 phylogenetic tree. Due to the ubiquity of electrostatic interactions in the biological environment, our findings are relevant for a broad range of studies dealing with the structural stability of SARS-CoV-2 and its interactions with the environment. Availability: The data underlying the article are available in the online Supplementary Material.
  🖺 Full Text HTML: Changes in total charge on spike protein of SARS-CoV-2 in emerging lineages
• SARS-CoV-2 methyltransferase nsp10-16 in complex with natural and drug-like purine analogs for guiding structure-based drug discovery -
  Non-structural protein 10 (nsp10) and non-structural protein 16 (nsp16) are part of the RNA synthesis complex, which is crucial for the replication of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Nsp16 exhibits 2-O-methyltransferase activity during viral messenger RNA capping and is active in a heterodimeric complex with enzymatically inactive nsp10. It has been shown that inactivation of the nsp10-16 protein complex interferes severely with viral replication, making it a highly promising drug target. As information on ligands binding to the nsp10-16 complex (nsp10-16) is still scarce, we screened the active site for potential binding of drug-like and fragment-like compounds using X-ray crystallography. The screened set of 244 compounds consists of derivatives of the natural substrate S-adenosyl methionine (SAM) and adenine derivatives, of which some have been described previously as methyltransferase inhibitors and nsp16 binders. A docking study guided the selection of many of these compounds. Here we report structures of binders to the SAM site of nsp10-16 and for two of them, toyocamycin and sangivamycin, we present additional crystal structures in the presence of a second substrate, Cap0-analog/Cap0-RNA. The identified hits were tested for binding to nsp10-16 in solution and antiviral activity in cell culture. Our data provide important structural information on various molecules that bind to the SAM substrate site which can be used as novel starting points for selective methyltransferase inhibitor designs.
  🖺 Full Text HTML: SARS-CoV-2 methyltransferase nsp10-16 in complex with natural and drug-like purine analogs for guiding structure-based drug discovery
• Changes in the senescence profile and immune checkpoints in HIV-infected individuals after COVID-19 -
  Background: Both SARS-CoV-2 and HIV infection exhibit alterations in the senescence profile and immune checkpoint (IC) molecules. However, the midterm impact of SARS-CoV-2 on these profiles in people with HIV (PWH) remains unclear. This study aimed to evaluate differences in plasma biomarker levels related to ICs, the senescence-associated secretory phenotype (SASP), and pro- and anti-inflammatory cytokines in PWH following recovery from SARS-CoV-2 infection. Methods: We conducted a cross-sectional study of 95 PWH receiving antiretroviral therapy, stratified by SARS-CoV-2 infection status: a) 48 previously infected (HIV/SARS) and b) 47 controls without previous infection (HIV). Plasma biomarkers (n=44) were assessed using Procartaplex Multiplex Immunoassays. Differences were analyzed using a generalized linear model adjusted for sex and ethnicity and corrected for the false discovery rate. Significant values were defined as an adjusted arithmetic mean ratio [≥]1.2 or [≤]0.8 and a qvalue<0.1. Spearman correlation evaluated relationships between plasma biomarkers (significant correlations, rho[≥]0.3 and q value<0.1). Results: The median age of the PWH was 45 years, and 80% were men. All SARS-CoV-2-infected PWH experienced symptomatic infection; 83.3% had mild symptomatic infection, and sample collection occurred at a median of 12 weeks postdiagnosis. The HIV/SARS group showed higher levels of ICs (CD80, PDCD1LG2, CD276, PDCD1, CD47, HAVCR2, TIMD4, TNFRSF9, TNFRSF18, and TNFRSF14), SASP (LTA, CXCL8, and IL13), and inflammatory plasma biomarkers (IL4, IL12B, IL17A, CCL3, CCL4, and INF1A) than did the HIV group. Conclusions: SARS-CoV-2 infection in PWH causes significant midterm disruptions in plasma ICs and inflammatory cytokine levels, highlighting SASP-related factors, which could be risk factors for the emergence of complications in PWH.
  🖺 Full Text HTML: Changes in the senescence profile and immune checkpoints in HIV-infected individuals after COVID-19
• Tracking inflammation resolution signatures in lungs after SARS-CoV-2 omicron BA.1 infection of K18-hACE2 mice -
  The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) causes Coronavirus Disease 2019 (COVID-19), which can result in severe disease often characterised by a 'cytokine storm' and the associated acute respiratory distress syndrome. However, many infections with SARS-CoV-2 are mild or asymptomatic throughout the course of infection. Although blood biomarkers of severe disease are well studied, less well understood are the inflammatory signatures in lung tissues associated with mild disease or silent infections, wherein infection and inflammation are rapidly resolved leading to sequelae-free recovery. Herein we described RNA-Seq and histological analyses of lungs over time in an omicron BA.1/K18-hACE2 mouse infection model, which displays these latter features. Although robust infection was evident at 2 days post infection (dpi), viral RNA was largely cleared by 10 dpi. Acute inflammatory signatures showed a slightly different pattern of cytokine signatures compared with severe infection models, but where much diminished 30 dpi and absent by 66 dpi. Cellular deconvolution identified significantly increased abundance scores for a number of anti-inflammatory pro-resolution cell types at 5/10 dpi. These included type II innate lymphoid cells, T regulatory cells, and interstitial macrophages. Genes whose expression trended downwards over 2 - 66 dpi included biomarkers of severe disease and were associated with 'cytokine storm' pathways. Genes whose expression trended upward during this period were associated with recovery of ciliated cells, AT2 to AT1 transition, reticular fibroblasts and innate lymphoid cells, indicating a return to homeostasis. Very few differentially expressed host genes were identified at 66 dpi, suggesting near complete recovery. The parallels between mild or subclinical infections in humans and those observed in this BA.1/K18-hACE2 mouse model are discussed.
  🖺 Full Text HTML: Tracking inflammation resolution signatures in lungs after SARS-CoV-2 omicron BA.1 infection of K18-hACE2 mice

From Clinical Trials

• Home-Based Circuit Training in Overweight/Obese Older Adult Patients With Knee Osteoarthritis and Type 2 Diabetes - Conditions: Aerobic Exercise; Strength Training; Glycemic Control; Blood Pressure; Oxidative Stress; Metabolic Syndrome
  Interventions: Behavioral: 12-week home-based circuit training (HBCT); Behavioral: Standard of care (CONT)
  Sponsors: Princess Nourah Bint Abdulrahman University
  Completed

• RECOVER-AUTONOMIC Platform Protocol - Conditions: Long COVID; Long Covid19; Long Covid-19
  Interventions: Drug: IVIG + Coordinated Care; Drug: IVIG Placebo + Coordinated Care; Drug: Ivabradine + Coordinated Care; Drug: Ivabradine Placebo + Coordinated Care; Drug: IVIG + Usual Care; Drug: IVIG Placebo + Usual Care; Drug: Ivabradine + Usual Care; Drug: Ivabradine Placebo + Usual Care
  Sponsors: Kanecia Obie Zimmerman
  Enrolling by invitation

• SVF for Treating Pulmonary Fibrosis Post COVID-19 - Conditions: Pulmonary Fibrosis
  Interventions: Biological: Autologous adipose-derived SVF IV administration
  Sponsors: Michael H Carstens; Ministerio de Salud de Nicaragua; Wake Forest University; National Autonomous University of Nicaragua
  Completed

• RECOVER-AUTONOMIC: Platform Protocol, Appendix B (Ivabradine) - Conditions: Long COVID; Long Covid19; Long Covid-19
  Interventions: Drug: Ivabradine; Drug: Ivabradine Placebo; Behavioral: Coordinated Care; Behavioral: Usual Care
  Sponsors: Kanecia Obie Zimmerman
  Enrolling by invitation

• RECOVER-AUTONOMIC: Platform Protocol, Appendix A (IVIG) - Conditions: Long COVID; Long Coronavirus Disease 2019 (Covid19); Long Covid-19
  Interventions: Drug: IVIG (intravenous immunoglobulin); Drug: IVIG Placebo; Behavioral: Coordinated Care; Behavioral: Usual Care
  Sponsors: Kanecia Obie Zimmerman
  Not yet recruiting

• Understanding Adaptive Immune Response After COVID-19 Vaccination Boosters to Improve Vaccination Strategies in Vulnerable Groups. - Conditions: COVID-19
  Interventions: Other: Analisys of cellular response and humoral response to SARS-CoV-2 vaccine booster doses
  Sponsors: IRCCS Sacro Cuore Don Calabria di Negrar
  Recruiting

• COVIDVaxStories: Randomized Trial to Reduce COVID-19 Vaccine Hesitancy in Populations of Color - Conditions: Vaccine Hesitancy
  Interventions: Behavioral: Storytelling; Behavioral: Learn More (Active Comparator)
  Sponsors: University of Massachusetts, Worcester; Merck Sharp & Dohme LLC
  Recruiting

• An E-health Psychoeducation for People With Bipolar Disorders - Conditions: Bipolar Disorder; Psychoeducation; COVID-19 Pandemic
  Interventions: Other: e-health psychoeducation
  Sponsors: University of Cagliari; Alessandra Perra
  Completed

• Sulfureous Water Therapy in Viral Respiratory Diseases - Conditions: Long-COVID; Post COVID-19 Condition; Chronic COVID-19 Syndrome; Post Acute Sequelae of COVID-19
  Interventions: Other: Inhalation of Sulfurous Thermal Water; Other: Inhalation of Sterile Distilled non-pyrogenic Water
  Sponsors: University of Roma La Sapienza; Università degli studi di Roma Foro Italico; Queen Mary University of London; Bios Prevention Srl
  Completed

• Phase 3 Study to Evaluate the Safety and Immunogenicity of COVID-19 Vaccine and Influenza Combination Vaccine - Conditions: COVID-19
  Interventions: Biological: CIC Vaccine Co-formulated tNIV2 , SARSCoV-2 rS and Matrix-M Adjuvant; Biological: Novavax COVID-19 Vaccine; Biological: Comparator Influenza Vaccine - Fluarix; Biological: Comparator Influenza Vaccine -Fluarix High Dose; Biological: Placebo 0.9% sodium chloride for injection
  Sponsors: Novavax
  Not yet recruiting

• Evaluation of KGR Prescriptions in Suppressing COVID-19 Infection. - Conditions: Coronavirus Disease 2019; Severe Acute Respiratory Syndrome Coronavirus 2 Infection
  Interventions: Combination Product: Kang Guan Recipe (Treat); Combination Product: Kang Guan Recipe (Placebo)
  Sponsors: Sheng-Teng Huang
  Completed

• SHEN211 Tablets for the Treatment of Mild and Moderate Novel Corona Virus Infections (COVID-19) - Conditions: COVID-19
  Interventions: Drug: SHEN211 Tablets; Procedure: Placebo for SHEN211 Tablets
  Sponsors: JKT Biopharma Co., Ltd.
  Not yet recruiting

From PubMed

• Examination of SARS-CoV-2 serological test results from multiple commercial and laboratory platforms with an in-house serum panel - Severe acute respiratory syndrome (SARS) coronavirus 2 (SARS-CoV-2) is a novel human coronavirus that was identified in 2019. SARS-CoV-2 infection results in an acute, severe respiratory disease called coronavirus disease 2019 (COVID-19). The emergence and rapid spread of SARS-CoV-2 has led to a global public health crisis, which continues to affect populations across the globe. Real time reverse transcription polymerase chain reaction (rRT-PCR) is the reference standard test for COVID-19…

• Neutralization of SARS-CoV-2 and Intranasal Protection of Mice with a nanoCLAMP Antibody Mimetic - Intranasal treatment, combined with vaccination, has the potential to slow mutational evolution of viruses by reducing transmission and replication. Here, we illustrate the development of a SARS-CoV-2 receptor-binding domain (RBD) nanoCLAMP and demonstrate its potential as an intranasally administered therapeutic. A multi-epitope nanoCLAMP was made by fusing a pM affinity single-domain nanoCLAMP (P2710) to alternate epitope-binding nanoCLAMP, P2609. The resulting multimerized nanoCLAMP P2712 had…

• Exploring cell-free assays for COVID-19 serosurvey - Serosurveys to monitor immunity toward COVID-19 in the population are primarily performed using an ELISA to screen samples for SARS-CoV-2 antibodies, followed by confirmation by a virus neutralization test, which is considered the Gold Standard. However, virus neutralization test may not be feasible for some laboratories because of the requirement for specific facilities and trained personnel. In an attempt to address this limitation, we evaluated three cell-free methods as potential…

• The risk of acute infections in new users of antidepressants: An observational cohort study - CONCLUSIONS: Fluoxetine, sertraline, paroxetine, and venlafaxine were not associated with a reduced risk of acute infection when compared with the presumably weak FIASMA citalopram.

• Overlaid Lateral Flow Immunoassay for the Simultaneous Detection of Two Variant-Specific SARS-CoV-2 Neutralizing Antibodies - COVID-19 vaccines have been provided to the general public to build immunity since the 2019 coronavirus pandemic. Once vaccinated, SARS-CoV-2 neutralizing antibodies (NAbs-COVID-19) are needed for excellent protection against COVID-19. However, monitoring NAbs-COVID-19 is complicated and requires hospital visits. Moreover, the resulting NAbs-COVID-19 are effective against different strains of COVID-19 depending on the type of vaccine received. Here, an overlaid lateral flow immunoassay (O-LFIA)…

• An orally bioavailable SARS-CoV-2 main protease inhibitor exhibits improved affinity and reduced sensitivity to mutations - Inhibitors of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) main protease (M^(pro)) such as nirmatrelvir (NTV) and ensitrelvir (ETV) have proven effective in reducing the severity of COVID-19, but the presence of resistance-conferring mutations in sequenced viral genomes raises concerns about future drug resistance. Second-generation oral drugs that retain function against these mutants are thus urgently needed. We hypothesized that the covalent hepatitis C virus protease…

• Repurposing of Plant-based Antiviral Molecules for the Treatment of COVID-19 - COVID-19, stemming from SARS-CoV-2, poses a formidable threat to global healthcare, with a staggering 77 million confirmed cases and 690,067 deaths recorded till December 24, 2023. Given the absence of specific drugs for this viral infection, the exploration of novel antiviral compounds becomes imperative. High-throughput technologies are actively engaged in drug discovery, and there is a parallel effort to repurpose plant-based molecules with established antiviral properties. In this context,…

• Protective effect and mechanism of Qingfei Paidu decoction on myocardial damage mediated by influenza viruses - Introduction: Significant attention has been paid to myocardial damage mediated by the single-stranded RNA virus. Qingfei Paidu decoction (QFPDD) has been proved to protect the damage caused by the influenza virus A/PR/8/1934 (PR8), but its specific mechanism is unclear. Methods: Molecular biological methods, together with network pharmacology, were used to analyze the effects and underlying mechanism of QFPDD treatment on PR8-induced myocardial damage to obtain insights into the treatment of…

• Decoding HiPSC-CM’s Response to SARS-CoV-2: mapping the molecular landscape of cardiac injury - CONCLUSION: SARS-CoV-2 infection in hiPSC-CMs is fundamentally mediated via mitochondrial dysfunction. Therapeutic interventions targeting mitochondrial dysfunction may alleviate the cardiovascular complications associated with SARS-CoV-2 infection.

• Identification of Phytochemicals from Arabian Peninsula Medicinal Plants as Strong Binders to SARS-CoV-2 Proteases (3CL(Pro) and PL(Pro)) by Molecular Docking and Dynamic Simulation Studies - We provide promising computational (in silico) data on phytochemicals (compounds 1-10) from Arabian Peninsula medicinal plants as strong binders, targeting 3-chymotrypsin-like protease (3CL^(Pro)) and papain-like proteases (PL^(Pro)) of SARS-CoV-2. Compounds 1-10 followed the Lipinski rules of five (RO5) and ADMET analysis, exhibiting drug-like characters. Non-covalent (reversible) docking of compounds 1-10 demonstrated their binding with the catalytic dyad (CYS145 and HIS41) of 3CL^(Pro) and…

• Inhibitory Efficacy of Main Components of Scutellaria baicalensis on the Interaction between Spike Protein of SARS-CoV-2 and Human Angiotensin-Converting Enzyme II - Blocking the interaction between the SARS-CoV-2 spike protein and the human angiotensin-converting enzyme II (hACE2) protein serves as a therapeutic strategy for treating COVID-19. Traditional Chinese medicine (TCM) treatments containing bioactive products could alleviate the symptoms of severe COVID-19. However, the emergence of SARS-CoV-2 variants has complicated the process of developing broad-spectrum drugs. As such, the aim of this study was to explore the efficacy of TCM treatments against…

• Inhalation of ACE2-expressing lung exosomes provides prophylactic protection against SARS-CoV-2 - Continued emergence of SARS-CoV-2 variants of concern that are capable of escaping vaccine-induced immunity highlights the urgency of developing new COVID-19 therapeutics. An essential mechanism for SARS-CoV-2 infection begins with the viral spike protein binding to the human ACE2. Consequently, inhibiting this interaction becomes a highly promising therapeutic strategy against COVID-19. Herein, we demonstrate that ACE2-expressing human lung spheroid cells (LSC)-derived exosomes (LSC-Exo) could…

• Licorice extract inhibits porcine epidemic diarrhea virus in vitro and in vivo - Porcine epidemic diarrhea virus (PEDV) causes severe diarrhea and even death in piglets, resulting in significant economic losses to the pig industry. Because of the ongoing mutation of PEDV, there might be variations between the vaccine strain and the prevailing strain, causing the vaccine to not offer full protection against different PEDV variant strains. Therefore, it is necessary to develop anti-PEDV drugs to compensate for vaccines. This study confirmed the anti-PEDV effect of licorice…

• Neutrophil proteases are protective against SARS-CoV-2 by degrading the spike protein and dampening virus-mediated inflammation - Studies on severe acute respiratory syndrome coronavirus type 2 (SARS-CoV-2) have highlighted the crucial role of host proteases for viral replication and the immune response. The serine proteases furin and TMPRSS2 and lysosomal cysteine proteases were shown to facilitate virus entry by limited proteolytic processing of the spike (S) protein. While neutrophils are recruited to the lungs during COVID-19 pneumonia, little is known about the role of the neutrophil serine proteases (NSPs) cathepsin…

• ACE2 acts as a novel regulator of TMPRSS2-catalyzed proteolytic activation of influenza A virus in airway cells - The transmembrane serine protease 2 (TMPRSS2) activates the outer structural proteins of a number of respiratory viruses including influenza A virus (IAV), parainfluenza viruses, and various coronaviruses for membrane fusion. Previous studies showed that TMPRSS2 interacts with the carboxypeptidase angiotensin-converting enzyme 2 (ACE2), a cell surface protein that serves as an entry receptor for some coronaviruses. Here, by using protease activity assays, we determine that ACE2 increases the…

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