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Development of an IgG-Fc fusion COVID-19 subunit vaccine, AKS-452

AKS-452 is a biologically-engineered vaccine comprising an Fc fusion protein of the SARS-CoV-2 viral spike protein receptor binding domain antigen (Ag) and human IgG1 Fc (SP/RBD-Fc) in clinical development for the induction and augmentation of neutralizing IgG titers against SARS-CoV-2 viral infection to address the COVID-19 pandemic.

SARS-CoV-2 Spike protein (RBD, L452R, T478K, Avi & His Tag)-HRP

SARS-CoV-2 (Severe Acute Respiratory Syndrome Coronavirus 2) also known as 2019-nCoV (2019 Novel Coronavirus) is a virus that causes illnesses ranging from the common cold to severe diseases. As of May 2021, three sublineages have been found. Despite its name, B.1.617.3 was the first sublineage o...

Immunogenicity phase II study evaluating booster capacity of ...

Subject demographics and safety assessment. This phase II ACT-BOOSTER study (NCT05124483; EudraCT: 2021-005509-28/ABR 79397) was designed to include 600 healthy volunteer subjects comprised of 4 ...

SARS-CoV-2 spike L452R mutation increases Omicron variant ... - Nature

The Omicron-L452R variant increases fusogenicity, infectivity and host glycolysis. a The cumulative cases of SARS-CoV-2 virus mutations based on data deposited in the GISAID database from January ...

A randomized phase I/II safety and immunogenicity study of the ...

AKS-452 is a recombinant fusion protein comprising SP/RBD and an Fc fragment containing a portion of the hinge region, in which the full CH2 and CH3 domains of the human IgG1 Fc fragment are connected via a covalent peptide linker sequence, all encoded by a single nucleic acid molecule expressed in CHO-K1 cells as previously described [14], [15] (#MDS0002, 586 µg/ml; Akston Biosciences ...

Immunogenicity phase II study evaluating booster capacity of ...

AKS-452, a subunit vaccine comprising an Fc fusion of the ancestral wild-type (WT) SARS-CoV-2 virus spike protein receptor binding domain (SP/RBD), was evaluated without adjuvant in a single cohort, non-randomized, open-labelled phase II study (NCT05124483) at a single site in The Netherlands for safety and immunogenicity.A single 90 µg subcutaneous booster dose of AKS-452 was administered to ...

SARS-CoV-2 spike L452R variant evades cellular immunity and increases ...

Escape of two naturally occurring SARS-CoV-2 mutations from S RBM-specific CD8 + T cells (A and B) Detection of HLA-A24-restricted NF9-specific CTLs. HLA-A24-positive CTL lines of 3 seronegative donors and 16 COVID-19 convalescent donors as well as 6 HLA-A24-negative COVID-19 convalescent donors (listed in Table S2) were stimulated with or without 1 μM NF9 peptide (NYNYLYRLF, residues 448 ...

PDF Immunogenicity phase II study evaluating booster capacity of ...

COVID-19. Although mRNA-based vaccines had been redesigned with omicron SP variants in hopes of inducing the appropriate variant-speci fic response8, they were not more effective at enhancing ...

SARS-CoV-2 Spike Mutations, L452R, T478K, E484Q and P681R, in ... - PubMed

As the global severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic expands, genomic epidemiology and whole genome sequencing are being used to investigate its transmission and evolution. Against the backdrop of the global emergence of "variants of concern" (VOCs) during December 202 …

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