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10.1126/sciadv.abf1591

http://scihub22266oqcxt.onion/10.1126/sciadv.abf1591
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33741598!7978432!33741598
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suck abstract from ncbi


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pmid33741598      Sci+Adv 2021 ; 7 (12): ä
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  • Single-component, self-assembling, protein nanoparticles presenting the receptor binding domain and stabilized spike as SARS-CoV-2 vaccine candidates #MMPMID33741598
  • He L; Lin X; Wang Y; Abraham C; Sou C; Ngo T; Zhang Y; Wilson IA; Zhu J
  • Sci Adv 2021[Mar]; 7 (12): ä PMID33741598show ga
  • Vaccination against SARS-CoV-2 provides an effective tool to combat the COVID-19 pandemic. Here, we combined antigen optimization and nanoparticle display to develop vaccine candidates for SARS-CoV-2. We first displayed the receptor-binding domain (RBD) on three self-assembling protein nanoparticle (SApNP) platforms using the SpyTag/SpyCatcher system. We then identified heptad repeat 2 (HR2) in S2 as the cause of spike metastability, designed an HR2-deleted glycine-capped spike (S2GDeltaHR2), and displayed S2GDeltaHR2 on SApNPs. An antibody column specific for the RBD enabled tag-free vaccine purification. In mice, the 24-meric RBD-ferritin SApNP elicited a more potent neutralizing antibody (NAb) response than the RBD alone and the spike with two stabilizing proline mutations in S2 (S2P). S2GDeltaHR2 elicited twofold higher NAb titers than S2P, while S2GDeltaHR2 SApNPs derived from multilayered E2p and I3-01v9 60-mers elicited up to 10-fold higher NAb titers. The S2GDeltaHR2-presenting I3-01v9 SApNP also induced critically needed T cell immunity, thereby providing a promising vaccine candidate.
  • |*COVID-19 Vaccines/chemistry/immunology/pharmacology[MESH]
  • |*Nanoparticles/chemistry/therapeutic use[MESH]
  • |*SARS-CoV-2/chemistry/immunology[MESH]
  • |*Spike Glycoprotein, Coronavirus/chemistry/immunology/pharmacology[MESH]
  • |Animals[MESH]
  • |Antibodies, Neutralizing/immunology[MESH]
  • |Antibodies, Viral/immunology[MESH]
  • |COVID-19/*immunology/prevention & control[MESH]
  • |HEK293 Cells[MESH]
  • |Humans[MESH]
  • |Immunogenicity, Vaccine[MESH]
  • |Mice[MESH]
  • |Mice, Inbred BALB C[MESH]


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