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Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Cell+Host+Microbe 2020 ; 28 (3): 475-485.e5 Nephropedia Template TP
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Neutralizing Antibody and Soluble ACE2 Inhibition of a Replication-Competent VSV-SARS-CoV-2 and a Clinical Isolate of SARS-CoV-2 #MMPMID32735849
Case JB; Rothlauf PW; Chen RE; Liu Z; Zhao H; Kim AS; Bloyet LM; Zeng Q; Tahan S; Droit L; Ilagan MXG; Tartell MA; Amarasinghe G; Henderson JP; Miersch S; Ustav M; Sidhu S; Virgin HW; Wang D; Ding S; Corti D; Theel ES; Fremont DH; Diamond MS; Whelan SPJ
Cell Host Microbe 2020[Sep]; 28 (3): 475-485.e5 PMID32735849show ga
Antibody-based interventions against SARS-CoV-2 could limit morbidity, mortality, and possibly transmission. An anticipated correlate of such countermeasures is the level of neutralizing antibodies against the SARS-CoV-2 spike protein, which engages with host ACE2 receptor for entry. Using an infectious molecular clone of vesicular stomatitis virus (VSV) expressing eGFP as a marker of infection, we replaced the glycoprotein gene (G) with the spike protein of SARS-CoV-2 (VSV-eGFP-SARS-CoV-2) and developed a high-throughput-imaging-based neutralization assay at biosafety level 2. We also developed a focus-reduction neutralization test with a clinical isolate of SARS-CoV-2 at biosafety level 3. Comparing the neutralizing activities of various antibodies and ACE2-Fc soluble decoy protein in both assays revealed a high degree of concordance. These assays will help define correlates of protection for antibody-based countermeasures and vaccines against SARS-CoV-2. Additionally, replication-competent VSV-eGFP-SARS-CoV-2 provides a tool for testing inhibitors of SARS-CoV-2 mediated entry under reduced biosafety containment.