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The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia.
Deep mutational scanning (DMS), a high-throughput method leveraging next-generation sequencing, has been crucial in mapping the functional landscapes of key severe acquired respiratory syndrome-coronavirus 2 (SARS-CoV-2) proteins. By systematically assessing thousands of amino acid changes, DMS provides a framework to understand Angiotensin-converting enzyme 2 (ACE2) binding and immune evasion by the spike protein, mechanisms and drug escape potential of the main and papain-like viral proteases and has highlighted areas of concern in the nucleocapsid protein that may affect most currently available rapid antigen testing kits. Each application has required the design of bespoke assays in eukaryotic (yeast and mammalian) cell models, providing an exemplar for the application of this technique to future pandemics.
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To assess the dynamics of humoral immune responses to inactivated SARS-CoV-2 vaccines across populations with and without prior COVID-19 infection, a longitudinal cohort study was conducted. A total of 38 COVID-19-recovered individuals and 165 naïve participants (without prior COVID-19 infection) were enrolled, all of whom completed a two-dose vaccination regimen. Levels of anti-spike (anti-S) and anti-nucleocapsid (anti-N) antibodies were analyzed at baseline and post-vaccination time points, including 6 weeks post-first dose, and 1 month and 6 months post-second dose.
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Centre for Advanced Materials and Technologies, Warsaw University of Technology, Warsaw, Poland.
We present a series of preclinical studies focused on developing in vitro 2D and 3D models for assessing immunogenic factors in preventing infectious diseases. Human peripheral blood mononuclear cells (PBMC) and Calu-3 cell lines (bronchial epithelial cells) were used to develop 2D and 3D models. Peptides: Spike-S1-His (S-His), nucleocapsid-His and adjuvants: human adenovirus five serotype-based viral vector (AdV-D24-ICOSL-CD40L), armed with inducible co-stimulator (ICOSL) and CD40 ligand (CD40L), and a vector lacking these transgenes (AdV5/3) were used due to their effective initial interaction with antigen-presenting cells (APC).
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September 2025
Department of Clinical Microbiology, Umea University, Umea, Sweden.
Introduction: An unbalanced immune response and excessive inflammation are the major hallmarks of severe SARS-CoV-2 infection, which can result in multiorgan failure and death. The dysregulation of the complement system has been shown in various studies as a crucial factor in the immunopathology of SARS-CoV-2 infection. Complement alternative pathway has been linked to the excessive inflammation in severe SARS-CoV-2 infection in which decreased levels of factor H (FH) and elevated levels of properdin (FP) were observed.
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