Covid-19 Sentry

Contents

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

From Preprints

• Efficacy of Host Cell Serine Protease Inhibitor MM3122 against SARS-CoV-2 for Treatment and Prevention of COVID-19 -
  We have developed a novel class of peptidomimetic inhibitors targeting several host cell human serine proteases including TMPRSS2, matriptase and hepsin. TMPRSS2 is a membrane associated protease which is highly expressed in the upper and lower respiratory tract and is utilized by SARS-CoV-2 and other viruses to proteolytically process their glycoproteins, enabling host cell receptor binding, entry, replication, and dissemination of new virion particles. We have previously shown that compound MM3122 exhibited subnanomolar potency against all three proteases and displayed potent antiviral effects against SARS-CoV-2 in a cell-viability assay. Herein, we demonstrate that MM3122 potently inhibits viral replication in human lung epithelial cells and is effective against the XBB.1.5 and EG.5.1 variant of SARS-CoV-2. Further, we have evaluated MM3122 in a mouse model of COVID-19 and have demonstrated that MM3122 administered intraperitoneally (IP) before (prophylactic) or after (therapeutic) SARS-CoV-2 infection had significant protective effects against weight loss and lung congestion, and reduced pathology. Amelioration of COVID-19 disease was associated with a reduction in pro-inflammatory cytokines and chemokines production after SARS-CoV-2 infection. Prophylactic, but not therapeutic, administration of MM3122 also reduced virus titers in the lungs of SARS-CoV-2 infected mice. Therefore, MM3122 is a promising lead candidate small molecule drug for the treatment and prevention of infections caused by SARS-CoV-2 and other coronaviruses.
  🖺 Full Text HTML: Efficacy of Host Cell Serine Protease Inhibitor MM3122 against SARS-CoV-2 for Treatment and Prevention of COVID-19
• FABP4 as a Therapeutic Host Target Controlling SARS-CoV2 Infection -
  Host metabolic fitness is a critical determinant of infectious disease outcomes. In COVID-19, obesity and aging are major high-risk disease modifiers, although the underlying mechanism remains unknown. Here, we demonstrate that fatty acid binding protein 4 (FABP4), a critical regulator of metabolic dysfunction in these conditions, regulates SARS-CoV2 pathogenesis. Our study revealed that elevated FABP4 levels in COVID-19 patients strongly correlate with disease severity. In adipocytes and airway epithelial cells we found that loss of FABP4 function by genetic or pharmacological means impaired SARS-CoV2 replication and disrupted the formation of viral replication organelles. Furthermore, treatment of infected hamsters with FABP4 inhibitors alleviated lung damage and fibrosis and reduced lung viral titers. These results highlight a novel host factor critical for SARS-CoV2 infection and the therapeutic potential of FABP4-targeting agents in treating COVID-19 patients.
  🖺 Full Text HTML: FABP4 as a Therapeutic Host Target Controlling SARS-CoV2 Infection
• Pathways in the brain, heart, and lung influenced by SARS-CoV-2 NSP6 and SARS-CoV-2 regulated miRNAs: an in silico study hinting cancer incidence -
  The influence of SARS-CoV-2 non-structural protein in the host's tissue-specific complexities remains a mystery and needs more in-depth attention because of COVID-19 recurrence and long COVID. Here we investigated the influence of SARS-CoV-2 transmembrane protein NSP6 (Non-structural protein 6) in three major organs - the brain, heart, and lung in silico. To elucidate the interplay between NSP6 and host proteins, we analyzed the protein-protein interaction network of proteins interacting with NSP6 interacting proteins. Reported host interacting partners of NSP6 were ATP5MG, ATP6AP1, ATP13A3, and SIGMAR1. Pathway enrichment analyses provided global insights into biological pathways governed by differentially regulated genes in the three tissues after COVID-19 infection. Hub genes of tissue-specific protein interactome were analysed for drug targets and many were found. miRNA-gene network for the tissue-specific regulated proteins was sought. Comparing this list with the gene list targetted by SARS-CoV-2 regulated miRNAs, we found three and two common genes in the brain and lung respectively. Among the five common proteins revealed as potential therapeutic targets across the three tissues, four non-approved drugs and one approved drug could target Galectin 3 (LGALS3) and AIFM1 respectively. Increased expression of LGALS3 (that was upregulated in the heart after COVID-19 infection) is observed in multiple cancers and acts as a modulator for tumor progression. COVID-19 infection also causes myocardial inflammation and heart failure (HF). HF is observed to be increasing cancer incidence. The present scenario of long COVID-19 and recurrent COVID-19 infections warrants in-depth studies to probe the effect of COVID-19 infection on increased cancer incidence.
  🖺 Full Text HTML: Pathways in the brain, heart, and lung influenced by SARS-CoV-2 NSP6 and SARS-CoV-2 regulated miRNAs: an in silico study hinting cancer incidence
• Generative artificial intelligence performs rudimentary structural biology modelling -
  Natural language-based generative artificial intelligence (AI) is increasingly used by researchers in numerous fields, including the biological sciences. To date, the most commonly used tool grounded in this technology is Chat Generative Pre-trained Transformer (ChatGPT). While ChatGPT is typically used for natural language text generation, other intriguing application modes have recently been identified. We have recently reported the ability of ChatGPT to interpret the central dogma of molecular biology and the genetic code. Here we explored how ChatGPT-4 might be able to perform rudimentary structural biology modelling and drug binding analysis. We prompted ChatGPT-4 to model 3D structures for the 20 standard amino acids as well as an -helical polypeptide chain, with the latter involving incorporation of the Wolfram plugin for advanced mathematical computation. We also used ChatGPT-4 for structural analysis of drug-protein binding interaction between nirmatrelvir and its target, the SARS-CoV-2 main protease. For amino acid modelling, distances and angles between atoms of the generated structures in most cases approximated to experimentally determined value. For -helix modelling, the generated structures were comparable to that of an experimentally determined -helical structure. However, both amino acid and -helix modelling were sporadically error-prone and molecular complexity was not well tolerated. The binding interaction analysis revealed the ability of ChatGPT-4 to identify amino acid residues of the SARS-CoV-2 main protease involved in binding nirmatrelvir along with corresponding bond distances. Despite current limitations, we show the capacity of generative AI to perform basic structural biology modelling with atomic-scale accuracy. These results provide precedent for the potential use of generative AI in structural biology as this technology continues to advance.
  🖺 Full Text HTML: Generative artificial intelligence performs rudimentary structural biology modelling
• Mathematical Modelling Indicates Th-cell Targeted Antibody-Dependent Cellular Cytotoxic Is a Crucial Obstacle Hurdling HIV Vaccine Development -
  HIV poses a significant threat to human health. Although some progress has been made in the development of an HIV vaccine, there is currently no reported success in achieving an effective and fully functional vaccine for HIV. This highlights the challenges involved in HIV vaccine development. Through mathematical modeling, we have conducted a systematic study on the impact of antibody-dependent cellular cytotoxicity (ADCC) on HIV-specific immune responses. Unlike other viral infections, the ADCC effect following HIV infection may cause significant damage to the follicular center Th cells, leading to apoptosis of follicular center cells and rapid death of effector Th cells. This impedes the generation of neutralizing antibodies and creates barriers to viral clearance, thereby contributing to long-term infection. Another challenge posed by this effect is the substantial reduction in vaccine effectiveness, as effective antigenic substances such as gp120 bind to Th cell surfaces, resulting in the apoptosis of follicular center Th cells due to ADCC, hindering antibody regeneration. To address this issue, we propose the concept of using bispecific antibodies. By genetically editing B cells to insert the bispecific antibody gene, which consists of two parts targeting the CD4 binding site of HIV, such as the broadly neutralizing antibody 3BNC117, and the other targeting antibodies against other viruses, such as the spike protein of SARS-CoV-2. We can simultaneously enhance the levels of two pathogen-specific antibodies through stimulation with non-HIV-antigens corresponding to the other part of the chimeric antibody, such as the spike protein. This study contributes to the elucidation of the pathophysiology of HIV, while also providing a theoretical framework for the successful development of an HIV vaccine.
  🖺 Full Text HTML: Mathematical Modelling Indicates Th-cell Targeted Antibody-Dependent Cellular Cytotoxic Is a Crucial Obstacle Hurdling HIV Vaccine Development
• Identifying causal role of COVID-19 in immunopsychiatry models -
  This preprint is a 1000-word Viewpoint that explores methodological considerations of the COVID-19 pandemic for immunopsychiatry. It has been accepted for publication in Brain, Behavior, and Immunity for a special issue on Immunopsychiatry and COVID-19. Specifically, we discuss the treatment of COVID-19 as a confounding versus mediating variable in immunopsychiatric research. We leverage simulated data varied in sample and effect size to illustrate key considerations. Further, we highlight the statistical implications of each of these scenarios. Recommendations and key considerations for the field are briefly discussed.
  🖺 Full Text HTML: Identifying causal role of COVID-19 in immunopsychiatry models
• Data-driven recombination detection in viral genomes -
  Recombination is a key molecular mechanism for the evolution and adaptation of viruses. The first recombinant SARS-CoV-2 genomes were recognized in 2021; as of today, more than ninety SARS-CoV-2 lineages are designated as recombinant. In the wake of the COVID-19 pandemic, several methods for detecting recombination in SARS-CoV-2 have been proposed; however, none could faithfully confirm manual analyses by experts in the field. We hereby present RecombinHunt, a novel, automated method for the identification of recombinant/mosaic genomes purely based on a data-driven approach. RecombinHunt compares favorably with other state-of-the-art methods and recognizes recombinant SARS-CoV-2 genomes (or lineages) with one or two breakpoints with high accuracy, within reduced turn-around times and small discrepancies with respect to the expert manually-curated standard nomenclature. Strikingly, applied to the complete collection of viral sequences from the recent monkeypox epidemic, RecombinHunt identifies recombinant viral genomes in high concordance with manually curated analyses by experts, suggesting that our approach is robust and can be applied to any epidemic/pandemic virus. In conclusion, RecombinHunt represents a breakthrough in the detection of recombinant viral lineages in pandemic/epidemic scenarios and could substantially improve/advance community-based approaches for the detection of recombinant viral genomes based on phylogenetic analyses.
  🖺 Full Text HTML: Data-driven recombination detection in viral genomes
• Social Comparison for Concern and Action on Climate Change, Racial Injustice, and COVID-19 -
  Preventing the negative impacts of major, intersectional social issues hinges on personal concern and willingness to take action. This research examines social comparison in the context of climate change, racial injustice, and COVID-19 during Fall 2020. Participants in a U.S. university sample (n = 288), reported personal levels of concern and action and estimated peers’ concern and action regarding these three issues. Participants estimated that they were more concerned than peers for all three issues, and took more action than peers regarding COVID-19 and climate change. Participants who reported higher levels of personal concern also estimated that they took greater action than peers (relative to participants who reported lower levels of concern). Exploratory analyses found that perceived personal control over social issues increased participants’ concern and action for racial injustice and climate change, but yielded no change for COVID-19. This indicates that issue-specific features, including perceived controllability, may drive people to differently assess their experiences of distinct social issues.
  🖺 Full Text HTML: Social Comparison for Concern and Action on Climate Change, Racial Injustice, and COVID-19
• Genome-wide association study reveals different T cell distributions in peripheral blood of healthy individuals at high genetic risk of type 1 diabetes and long COVID -

  The immune system plays a crucial role in many human diseases. In this context, genome-wide association studies (GWAS) offer valuable insights to elucidate the role of immunity in health and disease. The present multi-omics study aimed to identify genetic determinants of immune cell type distributions in the blood of healthy individuals and to assess whether the distributions of these cells may play a role for autoimmune and COVID-19 disease risk. To this end, the frequencies of different immune cells in 483 healthy individuals from the Berlin Aging Study II were quantified using flow cytometry, and GWAS was performed for 92 immune cell phenotypes. Additionally, we performed linear regression analyses of immune cell distributions using polygenic risk scores (PRS) based on prior GWAS for five autoimmune diseases as well as for COVID-19 infection and post-COVID syndrome (“long COVID”). We validated seven previously described immune loci and identified 13 novel loci showing genome-wide significant (α=5.00E-8) association with different immune cell phenotypes. The most significant novel signal was conferred by the SLC52A3 locus, encoding for a riboflavin transporter protein, which was associated with na&iumlve CD57+ CD8+ T cells (p=4.13E-17) and colocalized with SLC52A3 expression. Several novel loci contained immunologically plausible candidate genes, e.g., variants near TBATA and B3GAT1 representing genes associated with T cell phenotypes. The PRS of type 1 diabetes were significantly associated with CD8+ T cells at different differentiation states (p≤7.02E-4), and PRS of long COVID were associated with early-differentiated CD4+ T cells (p≤1.54E-4). In conclusion, our extensive immune cell GWAS analyses highlight several novel genetic loci of likely relevance for immune system function. Furthermore, our PRS analyses point to a shared genetic basis between immune cell distributions in healthy adults and T1D (CD8+ T cells) as well as long COVID (CD4+ T cells).

  🖺 Full Text HTML: Genome-wide association study reveals different T cell distributions in peripheral blood of healthy individuals at high genetic risk of type 1 diabetes and long COVID
• Implementation of Smart Triage combined with a quality improvement program for children presenting to facilities in Kenya and Uganda: An interrupted time series analysis. -

  PLOS DH (298/300 word limit) Sepsis occurs predominantly in low-middle-income countries. Sub-optimal triage contributes to poor early case recognition and outcomes from sepsis. We evaluated the impact of Smart Triage using improved time to intravenous antimicrobial administration in a multisite interventional study. Smart Triage was implemented (with control sites) in Kenya (February 2021-December 2022) and Uganda (April 2020-April 2022). Children presenting to the outpatient departments with an acute illness were enrolled. A controlled interrupted time series was used to assess the effect on time from arrival at the facility to intravenous antimicrobial administration. Secondary analyses included antimicrobial use, admission rates and mortality (NCT04304235). During the baseline period, the time to antimicrobials decreased significantly in Kenya (132 and 58 minutes) at control and intervention sites, but less in Uganda (3 minutes) at the intervention site. Then, during the implementation period in Kenya, the time to IVA at the intervention site decreased by 98 min (57%, 95% CI 81-114) but increased by 49 min (21%, 95% CI: 23-76) at the control site. In Uganda, the time to IVA initially decreased but was not sustained, and there was no significant difference between intervention and control sites. At the intervention sites, there was a significant reduction in IVA utilization of 47% (Kenya) and 33% (Uganda), a reduction in admission rates of 47% (Kenya) and 33% (Uganda) and a 25% (Kenya) and 75% (Uganda) reduction in mortality rates compared to the baseline period. We showed significant improvements in time to intravenous antibiotics in Kenya but not Uganda, likely due to COVID-19, a short study period and resource constraints. The reduced antimicrobial use and admission and mortality rates are remarkable and welcome benefits but should be interpreted cautiously as these were secondary outcomes. This study underlines the difficulty of implementing technologies and sustaining quality improvement in resource-poor health systems.

  🖺 Full Text HTML: Implementation of Smart Triage combined with a quality improvement program for children presenting to facilities in Kenya and Uganda: An interrupted time series analysis.
• Physicians experiences with telemedicine during the COVID-19 pandemic in India -

  Purpose: Digital health is an important factor in Indias healthcare system. Inclusive policy measures, a fertile technological landscape, and relevant infrastructural development with unprecedented levels of telemedicine adoption catalysed by the recent COVID-19 pandemic have thrown open new possibilities and opportunities for clinicians, end-users, and other stakeholders. Nevertheless, there are still several challenges to properly integrating and scaling telemedicine use in India. This studys objective was to understand the views of practising physicians in India on the use of telemedicine and the challenges experienced during the accelerated rollout during the first wave of the COVID-19 pandemic. Methods: We acquired data through an anonymous, cross-sectional, internet-based survey of physicians (n=444) across India on the COVID-19 frontline. These responses were subjected to qualitative data analysis (via inductive coding and thematic analyses) and descriptive statistics, as appropriate. Results: Most responses (n=51) were categorised under a code indicating that telemedicine-led healthcare delivery compromised treatment quality. The second largest proportion of responses (n=22) suggested that Accessibility, quality and maturity of software and hardware infrastructure was a considerable challenge. Conclusions: Despite the considerable uptake, perceived benefits, and the foreseen positive role of telemedicine in India, several challenges of telemedicine use (viz., technical, user experience-based integration, and non-user-based integration challenges) have been identified. These must be addressed through suggested relevant opportunities to realise telemedicines potential and help inform the future design of effective telemedicine policy and practice in India.

  🖺 Full Text HTML: Physicians experiences with telemedicine during the COVID-19 pandemic in India
• Factors associated with knowledge, attitudes, and behaviors regarding antiviral medications for COVID-19 among US adults -

  Background: Little is known about public perceptions of antivirals for the treatment of mild-to-moderate COVID-19 in the United States (US). Our objective was to explore adult perceptions toward COVID-19 antivirals with the goal of improving outreach communications about antivirals for COVID-19. Methods: During July 2022, potential respondents 18 years and older were randomly sampled from a national opt-in, non-representative, cross-sectional internet panel, with oversampling of African Americans, Hispanics, and adults 65 years and older. Respondents were asked about sociodemographic factors, and knowledge, attitudes, and perceptions regarding COVID-19 antivirals. Results were weighted to represent the non-institutionalized US adult population. Results: Among 1,155 respondents, 51% were female, 60% were 18-49 years, 21% were 50-64 years, and 19% were 65 years or older. Compared to those aged 18-49 years and 50-64 years, a greater proportion of adults 65 years and older were knowledgeable about COVID-19 antivirals and would take them if they tested positive or their doctor recommended them. Adults 65 years and over and those reporting immunosuppression or disability had the highest rates of willingness to take antivirals. For all groups, the proportion of people willing to take antivirals increased by >20% if recommended by their doctor. Respondents in the 50-64 and 65+ groups who were sure they would take COVID-19 antivirals were more likely to be fully vaccinated and less likely to be living in isolation. Conclusion: Groups that are less likely to have been vaccinated, those living in isolation, and those not sure about whether they would take an antiviral or not may be at risk for not receiving treatment to prevent severe COVID-19 outcomes. However, trust in doctor recommendations may be enough to overcome individual patient concerns about COVID-19 antivirals. Targeted initiatives to educate those at risk for severe COVID-19 outcomes about the effectiveness of antivirals, including those who are unvaccinated given their increased risk of severe disease, may be needed to further lower this population9s risk of severe COVID-19.

  🖺 Full Text HTML: Factors associated with knowledge, attitudes, and behaviors regarding antiviral medications for COVID-19 among US adults
• SARS-COV-2 induces blood-brain barrier and choroid plexus barrier impairments and vascular inflammation in mice -
  The coronavirus disease of 2019 (COVID-19) pandemic that has led to more than 700 million confirmed cases and near 7 million deaths. Although Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) virus mainly infects the respiratory system, neurological complications are widely reported in both acute infection and long-COVID cases. Despite the success of vaccines and antiviral treatments, neuroinvasiveness of SARS-CoV-2 remains as an important question, which is also centered on the mystery whether the virus is capable of breaching the barriers into the central nervous system. By studying the K18-hACE2 infection model, we observed clear evidence of microvascular damage and breakdown of the blood-brain barrier (BBB). Mechanistically, SARS-CoV-2 infection caused pericyte damage, tight junction loss, endothelial activation and vascular inflammation, which together drive microvascular injury and BBB impairment. In addition, the blood-cerebrospinal fluid barrier at the choroid plexus was also impaired after infection. Therefore, cerebrovascular and choroid plexus dysfunctions are important aspects of COVID-19 and may contribute to the neurological complications both acutely and in long COVID.
  🖺 Full Text HTML: SARS-COV-2 induces blood-brain barrier and choroid plexus barrier impairments and vascular inflammation in mice
• Unfolded Von Willebrand Factor Binds Protein S and Reduces Anticoagulant Activity -
  Protein S (PS), the critical plasma cofactor for the anticoagulants tissue factor (TF) pathway inhibitor (TFPI) and activated protein C (APC), circulates in two functionally distinct pools: free (anticoagulant) or bound to complement component 4b-binding protein (C4BP) (anti-inflammatory). Acquired free PS deficiency is detected in several viral infections, but its cause is unclear. Here, we identified a shear-dependent interaction between PS and von Willebrand Factor (VWF) by mass spectrometry. Consistently, plasma PS and VWF comigrated in both native and agarose gel electrophoresis. The PS/VWF interaction was blocked by TFPI but not APC, suggesting an interaction with the C-terminal sex hormone binding globulin (SHBG) region of PS. Microfluidic systems, mimicking arterial laminar flow or disrupted turbulent flow, demonstrated that PS stably binds VWF as VWF unfolds under turbulent flow. PS/VWF complexes also localized to platelet thrombi under laminar arterial flow. In thrombin generation-based assays, shearing plasma decreased PS activity, an effect not seen in the absence of VWF. Finally, free PS deficiency in COVID-19 patients, measured using an antibody that binds near the C4BP binding site in SHBG, correlated with changes in VWF, but not C4BP, and with thrombin generation. Our data suggest that PS binds to a shear-exposed site on VWF, thus sequestering free PS and decreasing its anticoagulant activity, which would account for the increased thrombin generation potential. As many viral infections present with free PS deficiency, elevated circulating VWF, and increased vascular shear, we propose that the PS/VWF interaction reported here is a likely contributor to virus-associated thrombotic risk.
  🖺 Full Text HTML: Unfolded Von Willebrand Factor Binds Protein S and Reduces Anticoagulant Activity
• Distinct evolution of SARS-CoV-2 Omicron XBB and BA.2.86/JN.1 lineages combining increased fitness and antibody evasion -
  The unceasing circulation of SARS-CoV-2 leads to the continuous emergence of novel viral sublineages. Here, we isolated and characterized XBB.1, XBB.1.5, XBB.1.9.1, XBB.1.16.1, EG.5.1.1, EG.5.1.3, XBF, BA.2.86.1 and JN.1 variants, representing >80% of circulating variants in January 2024. The XBB subvariants carry few but recurrent mutations in the spike, whereas BA.2.86.1 and JN.1 harbor >30 additional changes. These variants replicated in IGROV-1 but no longer in Vero E6 and were not markedly fusogenic. They potently infected nasal epithelial cells, with EG.5.1.3 exhibiting the highest fitness. Antivirals remained active. Neutralizing antibody (NAb) responses from vaccinees and BA.1/BA.2-infected individuals were markedly lower compared to BA.1, without major differences between variants. An XBB breakthrough infection enhanced NAb responses against both XBB and BA.2.86 variants. JN.1 displayed lower affinity to ACE2 and higher immune evasion properties compared to BA.2.86.1. Thus, while distinct, the evolutionary trajectory of these variants combines increased fitness and antibody evasion.
  🖺 Full Text HTML: Distinct evolution of SARS-CoV-2 Omicron XBB and BA.2.86/JN.1 lineages combining increased fitness and antibody evasion

From Clinical Trials

• SGB for COVID-induced Parosmia - Conditions: COVID-19-Induced Parosmia
  Interventions: Drug: Stellate Ganglion Block; Drug: Placebo Sham Injection
  Sponsors: Washington University School of Medicine
  Recruiting

• Investigating the Effectiveness of Vimida - Conditions: Long COVID; Post COVID-19 Condition
  Interventions: Behavioral: vimida
  Sponsors: Gaia AG; Medical School Hamburg; Institut Long-Covid Rostock
  Not yet recruiting

• Effects of Physiotherapy Via Video Calls on Cardiopulmonary Functions, Physical Function, Cognitive Function, Activity Daily Livings, and Quality of Life in Patients With COVID-19 - Conditions: COVID-19; Long COVID-19; Cardiopulmonary Function; Physical Function
  Interventions: Behavioral: Exercise training
  Sponsors: Chulabhorn Hospital
  Active, not recruiting

• Acute Cardiovascular Responses to a Single Exercise Session in Patients With Post-COVID-19 Syndrome - Conditions: Post-Acute COVID-19 Syndrome
  Interventions: Behavioral: Exercise session; Behavioral: Control session
  Sponsors: University of Nove de Julho
  Not yet recruiting

• Reducing Respiratory Virus Transmission in Bangladeshi Classrooms - Conditions: SARS-CoV2 Infection; Influenza Viral Infections; Respiratory Viral Infection
  Interventions: Device: Box Fan; Device: UV Germicidal Irradiation Lamp Unit; Device: Combined: Box Fan and UV Germicidal Irradiation Lamp Units
  Sponsors: Stanford University; Centers for Disease Control and Prevention; International Centre for Diarrhoeal Disease Research, Bangladesh
  Not yet recruiting

• SMILE: Clinical Trial to Evaluate Mindfulness as Intervention for Racial and Ethnic Populations During COVID-19 - Conditions: Anxiety; COVID-19 Pandemic
  Interventions: Behavioral: Mindfulness
  Sponsors: University of North Carolina, Chapel Hill; National Institute on Minority Health and Health Disparities (NIMHD); RTI International
  Not yet recruiting

• A Study to Learn About a Combined COVID-19 and Influenza Shot in Healthy Adults - Conditions: Influenza, Human; SARS-CoV-2 Infection; COVID-19
  Interventions: Biological: BNT162b2 (Omi XBB.1.5)/RIV; Biological: BNT162b2 (Omi XBB.1.5); Biological: RIV; Other: Normal saline placebo
  Sponsors: Pfizer
  Recruiting

• The Impact of the Covid-19 Pandemic on Orthopedic Trauma Management - Conditions: Trauma; COVID-19 Pandemic
  Interventions: Other: epidemyolojical
  Sponsors: Bakirkoy Dr. Sadi Konuk Research and Training Hospital
  Completed

• The Effects of Nutritional Intervention on Health Parameters in Participants With Type 2 Diabetes Mellitus - Conditions: Diabetes Mellitus Type 2; Diabetes Mellitus Type 2 in Obese; Diabetes; Diabetes Mellitus Non-insulin-dependent; Hypertension; Type 2 Diabetes Mellitus
  Interventions: Behavioral: Nutritional Intervention
  Sponsors: Sao Jose do Rio Preto Medical School; Fundação de Amparo à Pesquisa do Estado de São Paulo
  Completed

• Open-label, Multi-centre, Non-Inferiority Study of Safety and Immunogenicity of BIMERVAX for the Prevention of COVID-19 in Adolescents From 12 Years to Less Than 18 Years of Age. - Conditions: SARS CoV 2 Infection
  Interventions: Biological: BIMERVAX
  Sponsors: Hipra Scientific, S.L.U; Veristat, Inc.; VHIR; Asphalion
  Recruiting

• A Study of Amantadine for Cognitive Dysfunction in Patients With Long-Covid - Conditions: Long COVID; Post-Acute COVID-19 Syndrome
  Interventions: Drug: Amantadine; Other: Physical, Occupational, Speech Therapy; Other: Provider Counseling; Other: Medications for symptoms management
  Sponsors: University of Texas Southwestern Medical Center
  Not yet recruiting

• Balance Acceptance and Commitment Therapy for Long COVID - Conditions: Post-COVID-19 Syndrome; Long COVID
  Interventions: Behavioral: Balance Acceptance and Commitment Therapy
  Sponsors: King’s College London
  Not yet recruiting

• Study on the Effect of Incentive Spirometer-based Respiratory Training on the Long COVID-19 - Conditions: COVID-19 Pandemic; Diabetes; Hypertension; Cardiac Disease; Long COVID
  Interventions: Behavioral: Incentive Spirometer respiratory training
  Sponsors: National Taipei University of Nursing and Health Sciences; Tri-Service General Hospital
  Not yet recruiting

From PubMed

• Combination of Polygonatum Rhizoma and Scutellaria baicalensis triggers apoptosis through downregulation of PON₃ -induced mitochondrial damage and endoplasmic reticulum stress in A549 cells - CONCLUSION: SP inhibits proliferation of lung cancer A549 cells by downregulating PON(3) -induced apoptosis in the mitochondrial and ER pathways.

• Omicron BA.4/5 neutralization and cell-mediated immune responses in relation to baseline immune status and breakthrough infection among PLWH: A follow-up cohort study - There is a paucity of data on hybrid immunity (vaccination plus breakthrough infection [BI]), especially cell-mediated responses to Omicron among immunosuppressed patients. We aim to investigate humoral and cellular responses to Omicron BA.4/5 among people living with HIV (PLWH) with/without BIs, the most prevalent variant of concern after the reopening of China. Based on our previous study, we enrolled 77 PLWH with baseline immune status of severe acute respiratory syndrome coronavirus 2…

• Low pre-existing endemic human coronavirus (HCoV-NL63)-specific T cell frequencies are associated with impaired SARS-CoV-2-specific T cell responses in people living with HIV - CONCLUSION: Our results indicate that the decrease in SARS-CoV-2 specific T cell responses in PLWH may be attributable to reduced frequencies of pre-existing cross-reactive responses. However, HIV infection minimally affected the quality and magnitude of humoral responses, and this could explain why the risk of severe COVID-19 in PLWH is highly heterogeneous.

• Nebulized pH-Responsive Nanospray Combined with Pentoxifylline and Edaravone to Lungs for Efficient Treatments of Acute Respiratory Distress Syndrome - The COVID-19 pandemic has become an unprecedented global medical emergency, resulting in more than 5 million deaths. Acute respiratory distress syndrome (ARDS) caused by COVID-19, characterized by the release of a large number of pro-inflammatory cytokines and the production of excessive toxic ROS, is the most common serious complication leading to death. To develop new strategies for treating ARDS caused by COVID-19, a mouse model of ARDS was established by using lipopolysaccharide (LPS)….

• Influenza vaccination during the 2021/22 season: A data-linkage test-negative case-control study of effectiveness against influenza requiring emergency care in England and serological analysis of primary care patients - We present England 2021/22 end-of-season adjusted vaccine effectiveness (aVE) against laboratory confirmed influenza related emergency care use in children aged 1-17 and in adults aged 50+, and serological findings in vaccinated vs unvaccinated adults by hemagglutination inhibition assay. Influenza vaccination has been routinely offered to all children aged 2-10 years and adults aged 65 years + in England. In 2021/22, the offer was extended to children to age 15 years, and adults aged 50-64…

• Evaluation of molecular mechanisms of riboflavin anti-COVID-19 action reveals anti-inflammatory efficacy rather than antiviral activity - CONCLUSIONS: It is concluded that riboflavin reveals anti-inflammatory rather than antiviral activity for SARS-CoV-2 infection.

• An enhanced broad-spectrum peptide inhibits Omicron variants in vivo - The continual emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants of concern (VOCs) poses a major challenge to vaccines and antiviral therapeutics due to their extensive evasion of immunity. Aiming to develop potent and broad-spectrum anticoronavirus inhibitors, we generated A1-(GGGGS)7-HR2m (A1L35HR2m) by introducing an angiotensin-converting enzyme 2 (ACE2)-derived peptide A1 to the N terminus of the viral HR2-derived peptide HR2m through a long flexible linker,…

• Mesenchymal stromal cells (MSCs) as a therapeutic agent of inflammatory disease and infectious COVID-19 virus: live or dead mesenchymal? - The COVID-19 infection is a worldwide disease that causes numerous immune-inflammatory disorders, tissue damage, and lung dysfunction. COVID-19 vaccines, including those from Pfizer, AstraZeneca, and Sinopharm, are available globally as effective interventions for combating the disease. The severity of COVID-19 can be most effectively reduced by mesenchymal stromal cells (MSCs) because they possess anti-inflammatory activity and can reverse lung dysfunction. MSCs can be harvested from various…

• Genetic justification of COVID-19 patient outcomes using DERGA, a novel data ensemble refinement greedy algorithm - Complement inhibition has shown promise in various disorders, including COVID-19. A prediction tool including complement genetic variants is vital. This study aims to identify crucial complement-related variants and determine an optimal pattern for accurate disease outcome prediction. Genetic data from 204 COVID-19 patients hospitalized between April 2020 and April 2021 at three referral centres were analysed using an artificial intelligence-based algorithm to predict disease outcome (ICU vs….

• Milk Antiviral Proteins and Derived Peptides against Zoonoses - Milk is renowned for its nutritional richness but also serves as a remarkable reservoir of bioactive compounds, particularly milk proteins and their derived peptides. Recent studies have showcased several robust antiviral activities of these proteins, evidencing promising potential within zoonotic viral diseases. While several publications focus on milk’s bioactivities, antiviral peptides remain largely neglected in reviews. This knowledge is critical for identifying novel research directions…

• The Inhibition of Serine Proteases by Serpins Is Augmented by Negatively Charged Heparin: A Concise Review of Some Clinically Relevant Interactions - Serine proteases are members of a large family of hydrolytic enzymes in which a particular serine residue in the active site performs an essential role as a nucleophile, which is required for their proteolytic cleavage function. The array of functions performed by serine proteases is vast and includes, among others, the following: (i) the ability to fight infections; (ii) the activation of blood coagulation or blood clot lysis systems; (iii) the activation of digestive enzymes; and (iv)…

• A Narrative Review: The Role of NETs in Acute Respiratory Distress Syndrome/Acute Lung Injury - Nowadays, acute respiratory distress syndrome (ARDS) still has a high mortality rate, and the alleviation and treatment of ARDS remains a major research focus. There are various causes of ARDS, among which pneumonia and non-pulmonary sepsis are the most common. Trauma and blood transfusion can also cause ARDS. In ARDS, the aggregation and infiltration of neutrophils in the lungs have a great influence on the development of the disease. Neutrophils regulate inflammatory responses through various…

• Unveiling the Antiviral Properties of Panduratin A through SARS-CoV-2 Infection Modeling in Cardiomyocytes - Establishing a drug-screening platform is critical for the discovery of potential antiviral agents against SARS-CoV-2. In this study, we developed a platform based on human induced pluripotent stem cell-derived cardiomyocytes (iPSC-CMs) to investigate SARS-CoV-2 infectivity, with the aim of evaluating potential antiviral agents for anti-SARS-CoV-2 activity and cardiotoxicity. Cultured myocytes of iPSC-CMs and immortalized human cardiomyocyte cell line (AC-16) were primarily characterized for the…

• Ligand-Based Design of Selective Peptidomimetic uPA and TMPRSS2 Inhibitors with Arg Bioisosteres - Trypsin-like serine proteases are involved in many important physiological processes like blood coagulation and remodeling of the extracellular matrix. On the other hand, they are also associated with pathological conditions. The urokinase-pwlasminogen activator (uPA), which is involved in tissue remodeling, can increase the metastatic behavior of various cancer types when overexpressed and dysregulated. Another member of this protease class that received attention during the SARS-CoV 2 pandemic…

• Phytochemical Elucidation and Effect of Maesa indica (Roxb.) Sweet on Alleviation of Potassium Dichromate-Induced Pulmonary Damage in Rats - Maesa indica (Roxb.) Sweet is one of the well-known traditionally-used Indian plants. This plant is rich in secondary metabolites like phenolic acids, flavonoids, alkaloids, glycosides, saponins, and carbohydrates. It contains numerous therapeutically active compounds like palmitic acid, chrysophanol, glyceryl palmitate, stigmasterol, β-sitosterol, dodecane, maesaquinone, quercetin 3-rhaminoside, rutin, chlorogenic acid, catechin, quercetin, nitrendipine, 2,3-dihydroxypropyl…

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