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10.1038/s41598-021-91746-7

http://scihub22266oqcxt.onion/10.1038/s41598-021-91746-7
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suck abstract from ncbi


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pmid34127709      Sci+Rep 2021 ; 11 (1): 12448
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  • Glycan reactive anti-HIV-1 antibodies bind the SARS-CoV-2 spike protein but do not block viral entry #MMPMID34127709
  • Mannar D; Leopold K; Subramaniam S
  • Sci Rep 2021[Jun]; 11 (1): 12448 PMID34127709show ga
  • The SARS-CoV-2 spike glycoprotein is a focal point for vaccine immunogen and therapeutic antibody design, and also serves as a critical antigen in the evaluation of immune responses to COVID-19. A common feature amongst enveloped viruses such as SARS-CoV-2 and HIV-1 is the propensity for displaying host-derived glycans on entry spike proteins. Similarly displayed glycosylation motifs can serve as the basis for glyco-epitope mediated cross-reactivity by antibodies, which can have important implications on virus neutralization, antibody-dependent enhancement (ADE) of infection, and the interpretation of antibody titers in serological assays. From a panel of nine anti-HIV-1 gp120 reactive antibodies, we selected two (PGT126 and PGT128) that displayed high levels of cross-reactivity with the SARS-CoV-2 spike. We report that these antibodies are incapable of neutralizing pseudoviruses expressing SARS-CoV-2 spike proteins and are unlikely to mediate ADE via FcgammaRII receptor engagement. Nevertheless, ELISA and other immunoreactivity experiments demonstrate these antibodies are capable of binding the SARS-CoV-2 spike in a glycan-dependent manner. These results contribute to the growing literature surrounding SARS-CoV-2 S cross-reactivity, as we demonstrate the ability for cross-reactive antibodies to interfere in immunoassays.
  • |Antigen-Antibody Reactions[MESH]
  • |COVID-19/pathology/virology[MESH]
  • |Cross Reactions[MESH]
  • |Epitopes/immunology[MESH]
  • |HIV Antibodies/*immunology/pharmacology[MESH]
  • |Humans[MESH]
  • |Polysaccharides/*immunology[MESH]
  • |SARS-CoV-2/isolation & purification/*metabolism[MESH]
  • |Spike Glycoprotein, Coronavirus/*immunology[MESH]


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