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Deprecated: Implicit conversion from float 235.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 MAbs 2020 ; 12 (1): 1804241 Nephropedia Template TP
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A novel biparatopic hybrid antibody-ACE2 fusion that blocks SARS-CoV-2 infection: implications for therapy #MMPMID32804015
Miao X; Luo Y; Huang X; Lee SMY; Yuan Z; Tang Y; Chen L; Wang C; Wu F; Xu Y; Jiang W; Gao W; Song X; Yan Y; Pang T; Chen C; Zou Y; Fu W; Wan L; Gilbert-Jaramillo J; Knight M; Tan TK; Rijal P; Townsend A; Sun J; Liu X; James W; Tsun A; Xu Y
MAbs 2020[Jan]; 12 (1): 1804241 PMID32804015show ga
In the absence of a proven effective vaccine preventing infection by SARS-CoV-2, or a proven drug to treat COVID-19, the positive results of passive immune therapy using convalescent serum provide a strong lead. We have developed a new class of tetravalent, biparatopic therapy, 89C8-ACE2. It combines the specificity of a monoclonal antibody (89C8) that recognizes the relatively conserved N-terminal domain of the viral Spike (S) glycoprotein, and the ectodomain of ACE2, which binds to the receptor-binding domain of S. This molecule shows exceptional performance in vitro, inhibiting the interaction of recombinant S1 to ACE2 and transduction of ACE2-overexpressing cells by S-pseudotyped lentivirus with IC50s substantially below 100 pM, and with potency approximately 100-fold greater than ACE2-Fc itself. Moreover, 89C8-ACE2 was able to neutralize authentic viral infection in a standard 96-h co-incubation assay at low nanomolar concentrations, making this class of molecule a promising lead for therapeutic applications.