Mary Wilson
Well-known member
4 Oct 2022
DOI: 10.1126/scitranslmed.abq7360
EMMANUEL HEILMANN, FRANCESCO COSTACURTA, SEYED ARAD MOGHADASI, CHENGJIN YE, MATTEO PAVAN, DAVIDE BASSANI, ANDRE VOLLAND, CLAUDIA ASCHER, ALEXANDER KURT HERMANN WEISS, DAVID BANTE, REUBEN S. HARRIS, STEFANO MORO, BERNHARD RUPP, LUIS MARTINEZ-SOBRIDO, AND DOROTHEE VON LAER
Abstract
Protease inhibitors are among the most powerful antiviral drugs. Nirmatrelvir is the first protease inhibitor against the SARS-CoV-2 protease 3CL[SUP]pro[/SUP] that has been licensed for clinical use. To identify mutations that confer resistance to this protease inhibitor, we engineered a chimeric vesicular stomatitis virus (VSV) that expressed a polyprotein composed of the VSV glycoprotein G, the SARS-CoV-2 3CL[SUP]pro[/SUP], and the VSV polymerase L. Viral replication was thus dependent on the autocatalytic processing of this precursor protein by 3CL[SUP]pro[/SUP] and release of the functional viral polymerase L, and replication of this chimeric VSV was effectively inhibited by nirmatrelvir. Using this system, we applied nirmatrelvir to select for resistance mutations. Resistance was confirmed by retesting nirmatrelvir against the selected mutations in an additional VSV-based systems, in an independently developed cellular system, in a biochemical assay, and in a recombinant SARS-CoV-2 system. We demonstrate that some mutants are cross-resistant to ensitrelvir and GC376, whereas others are less resistant to these compounds. Furthermore, we found that most of these resistance mutations already existed in SARS-CoV-2 sequences that have been deposited in the NCBI and GISAID databases, indicating that these mutations were present in circulating SARS-CoV-2 strains.
https://www.science.org/doi/10.1126/scitranslmed.abq7360#.YzxuNO9iR6g.twitter
DOI: 10.1126/scitranslmed.abq7360
EMMANUEL HEILMANN, FRANCESCO COSTACURTA, SEYED ARAD MOGHADASI, CHENGJIN YE, MATTEO PAVAN, DAVIDE BASSANI, ANDRE VOLLAND, CLAUDIA ASCHER, ALEXANDER KURT HERMANN WEISS, DAVID BANTE, REUBEN S. HARRIS, STEFANO MORO, BERNHARD RUPP, LUIS MARTINEZ-SOBRIDO, AND DOROTHEE VON LAER
Abstract
Protease inhibitors are among the most powerful antiviral drugs. Nirmatrelvir is the first protease inhibitor against the SARS-CoV-2 protease 3CL[SUP]pro[/SUP] that has been licensed for clinical use. To identify mutations that confer resistance to this protease inhibitor, we engineered a chimeric vesicular stomatitis virus (VSV) that expressed a polyprotein composed of the VSV glycoprotein G, the SARS-CoV-2 3CL[SUP]pro[/SUP], and the VSV polymerase L. Viral replication was thus dependent on the autocatalytic processing of this precursor protein by 3CL[SUP]pro[/SUP] and release of the functional viral polymerase L, and replication of this chimeric VSV was effectively inhibited by nirmatrelvir. Using this system, we applied nirmatrelvir to select for resistance mutations. Resistance was confirmed by retesting nirmatrelvir against the selected mutations in an additional VSV-based systems, in an independently developed cellular system, in a biochemical assay, and in a recombinant SARS-CoV-2 system. We demonstrate that some mutants are cross-resistant to ensitrelvir and GC376, whereas others are less resistant to these compounds. Furthermore, we found that most of these resistance mutations already existed in SARS-CoV-2 sequences that have been deposited in the NCBI and GISAID databases, indicating that these mutations were present in circulating SARS-CoV-2 strains.
https://www.science.org/doi/10.1126/scitranslmed.abq7360#.YzxuNO9iR6g.twitter