Remdesivir for the Treatment of Covid-19 - Final Report.

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Abstract

Although several therapeutic agents have been evaluated for the treatment of coronavirus disease 2019 (Covid-19), no antiviral agents have yet been shown to be efficacious.

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Broad-spectrum antiviral GS-5734 inhibits both epidemic and zoonotic coronaviruses.

Timothy Sheahan, Amy Sims, Rachel Graham … (2017)

Emerging viral infections are difficult to control because heterogeneous members periodically cycle in and out of humans and zoonotic hosts, complicating the development of specific antiviral therapies and vaccines. Coronaviruses (CoVs) have a proclivity to spread rapidly into new host species causing severe disease. Severe acute respiratory syndrome CoV (SARS-CoV) and Middle East respiratory syndrome CoV (MERS-CoV) successively emerged, causing severe epidemic respiratory disease in immunologically naïve human populations throughout the globe. Broad-spectrum therapies capable of inhibiting CoV infections would address an immediate unmet medical need and could be invaluable in the treatment of emerging and endemic CoV infections. We show that a nucleotide prodrug, GS-5734, currently in clinical development for treatment of Ebola virus disease, can inhibit SARS-CoV and MERS-CoV replication in multiple in vitro systems, including primary human airway epithelial cell cultures with submicromolar IC50 values. GS-5734 was also effective against bat CoVs, prepandemic bat CoVs, and circulating contemporary human CoV in primary human lung cells, thus demonstrating broad-spectrum anti-CoV activity. In a mouse model of SARS-CoV pathogenesis, prophylactic and early therapeutic administration of GS-5734 significantly reduced lung viral load and improved clinical signs of disease as well as respiratory function. These data provide substantive evidence that GS-5734 may prove effective against endemic MERS-CoV in the Middle East, circulating human CoV, and, possibly most importantly, emerging CoV of the future.

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Comparative therapeutic efficacy of remdesivir and combination lopinavir, ritonavir, and interferon beta against MERS-CoV

Timothy Sheahan, Amy Sims, Sarah R. Leist … (2020)

Middle East respiratory syndrome coronavirus (MERS-CoV) is the causative agent of a severe respiratory disease associated with more than 2468 human infections and over 851 deaths in 27 countries since 2012. There are no approved treatments for MERS-CoV infection although a combination of lopinavir, ritonavir and interferon beta (LPV/RTV-IFNb) is currently being evaluated in humans in the Kingdom of Saudi Arabia. Here, we show that remdesivir (RDV) and IFNb have superior antiviral activity to LPV and RTV in vitro. In mice, both prophylactic and therapeutic RDV improve pulmonary function and reduce lung viral loads and severe lung pathology. In contrast, prophylactic LPV/RTV-IFNb slightly reduces viral loads without impacting other disease parameters. Therapeutic LPV/RTV-IFNb improves pulmonary function but does not reduce virus replication or severe lung pathology. Thus, we provide in vivo evidence of the potential for RDV to treat MERS-CoV infections.

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Coronavirus Susceptibility to the Antiviral Remdesivir (GS-5734) Is Mediated by the Viral Polymerase and the Proofreading Exoribonuclease

Maria Agostini, Erica L. Andres, Amy Sims … (2018)

ABSTRACT Emerging coronaviruses (CoVs) cause severe disease in humans, but no approved therapeutics are available. The CoV nsp14 exoribonuclease (ExoN) has complicated development of antiviral nucleosides due to its proofreading activity. We recently reported that the nucleoside analogue GS-5734 (remdesivir) potently inhibits human and zoonotic CoVs in vitro and in a severe acute respiratory syndrome coronavirus (SARS-CoV) mouse model. However, studies with GS-5734 have not reported resistance associated with GS-5734, nor do we understand the action of GS-5734 in wild-type (WT) proofreading CoVs. Here, we show that GS-5734 inhibits murine hepatitis virus (MHV) with similar 50% effective concentration values (EC50) as SARS-CoV and Middle East respiratory syndrome coronavirus (MERS-CoV). Passage of WT MHV in the presence of the GS-5734 parent nucleoside selected two mutations in the nsp12 polymerase at residues conserved across all CoVs that conferred up to 5.6-fold resistance to GS-5734, as determined by EC50. The resistant viruses were unable to compete with WT in direct coinfection passage in the absence of GS-5734. Introduction of the MHV resistance mutations into SARS-CoV resulted in the same in vitro resistance phenotype and attenuated SARS-CoV pathogenesis in a mouse model. Finally, we demonstrate that an MHV mutant lacking ExoN proofreading was significantly more sensitive to GS-5734. Combined, the results indicate that GS-5734 interferes with the nsp12 polymerase even in the setting of intact ExoN proofreading activity and that resistance can be overcome with increased, nontoxic concentrations of GS-5734, further supporting the development of GS-5734 as a broad-spectrum therapeutic to protect against contemporary and emerging CoVs.

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Journal

Journal ID (iso-abbrev): N Engl J Med

Title: The New England journal of medicine

Publisher: Massachusetts Medical Society

ISSN (Electronic): 1533-4406

ISSN (Print): 0028-4793

Publication date (Electronic): November 05 2020

Volume: 383

Issue: 19

Affiliations

[1 ] From the National Institute of Allergy and Infectious Diseases, National Institutes of Health (J.H.B., K.M.T., L.E.D., S.N., H.C.L.), and the Infectious Disease Clinical Research Program, Uniformed Services University of the Health Sciences (T.H.B.), Bethesda, the Clinical Monitoring Research Program Directorate, Frederick National Laboratory for Cancer Research, Frederick (T. Bonnett), and Emmes, Rockville (M.G., M.M.) - all in Maryland; Emory University, Atlanta (A.K.M.); Montefiore Medical Center-Albert Einstein College of Medicine (B.S.Z.) and NYU Langone Health and NYC Health and Hospitals-Bellevue (K.D.), New York; University of Nebraska Medical Center, Omaha (A.C.K., M.G.K.); Massachusetts General Hospital, Boston (E.H.), and University of Massachusetts Medical School, Worcester (R.W.F.); University of Washington, Seattle (H.Y.C.), and Evergreen Health Medical Center, Kirkland (D.L.C.) - both in Washington; University of California, San Francisco, San Francisco (A.L.), Cedars-Sinai Medical Center, Los Angeles (V.T.), University of California, Irvine, Irvine (L.H.), University of California, San Diego, La Jolla (D.A.S.), and Gilead Sciences, Foster City (A.O.) - all in California; University of Minnesota (S.K.) and University of Minnesota School of Public Health and INSIGHT (J.D.N.), Minneapolis; University of Texas Health San Antonio, University Health System, and the South Texas Veterans Health Care System, San Antonio (T.F.P.), and Baylor College of Medicine, Houston (R.L.A.); Hospital Germans Trias i Pujol and irsiCaixa AIDS Research Institute, Badalona, Spain (R.P.); University of Pennsylvania, Philadelphia (W.R.S.); Medical School, National and Kapodistrian University of Athens, Athens (G.T.); National Center for Infectious Diseases-Tan Tock Seng Hospital-Lee Kong Chian School of Medicine-Yong Loo Lin School of Medicine, Singapore, Singapore (D.C.L.); the National Center for Global Health and Medicine Hospital, Tokyo (N.O.); Seoul National University Hospital, Seoul, South Korea (M.O.); Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City (G.M.R.-P.); the Department of Infectious Diseases, Amager Hvidovre Hospital-University of Copenhagen, Hvidovre (T. Benfield), and Rigshospitalet, Department of Infectious Diseases (CHIP) and INSIGHT, Copenhagen (J.L.) - both in Denmark; University Hospital of Cologne, Cologne, Germany (G.F.); Vanderbilt University Medical Center, Nashville (C.B.C.); and University College London, MRC Clinical Trials Unit at UCL and INSIGHT, London (A.G.B., S.P.).

Article

DOI: 10.1056/NEJMoa2007764

PMC ID: 7262788

PubMed ID: 32445440

SO-VID: a890cbca-2c26-45ad-bfc1-7b24a5930477

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Remdesivir for the Treatment of Covid-19 - Final Report.

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Most cited references 6

Broad-spectrum antiviral GS-5734 inhibits both epidemic and zoonotic coronaviruses.

Comparative therapeutic efficacy of remdesivir and combination lopinavir, ritonavir, and interferon beta against MERS-CoV

Coronavirus Susceptibility to the Antiviral Remdesivir (GS-5734) Is Mediated by the Viral Polymerase and the Proofreading Exoribonuclease

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