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Mesfin YM, Blais JE, Kibret KT, Tegegne TK, Cowling BJ, Wu P. Effectiveness of nirmatrelvir/ritonavir and molnupiravir in non-hospitalized adults with COVID-19: systematic review and meta-analysis of observational studies. J Antimicrob Chemother 2024:dkae163. [PMID: 38817046 DOI: 10.1093/jac/dkae163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Accepted: 05/05/2024] [Indexed: 06/01/2024] Open
Abstract
OBJECTIVE To determine the effectiveness of nirmatrelvir/ritonavir and molnupiravir among vaccinated and unvaccinated non-hospitalized adults with COVID-19. METHODS Observational studies of nirmatrelvir/ritonavir or molnupiravir compared to no antiviral drug treatment for COVID-19 in non-hospitalized adults with data on vaccination status were included. We searched MEDLINE, EMBASE, Scopus, Web of Science, WHO COVID-19 Research Database and medRxiv for reports published between 1 January 2022 and 8 November 2023. The primary outcome was a composite of hospitalization or mortality up to 35 days after COVID-19 diagnosis. Risk of bias was assessed with ROBINS-I. Risk ratios (RR), hazard ratios (HR) and risk differences (RD) were separately estimated using random-effects models. RESULTS We included 30 cohort studies on adults treated with nirmatrelvir/ritonavir (n = 462 279) and molnupiravir (n = 48 008). Nirmatrelvir/ritonavir probably reduced the composite outcome (RR 0.62, 95%CI 0.55-0.70; I2 = 0%; moderate certainty) with no evidence of effect modification by vaccination status (RR Psubgroup = 0.47). In five studies, RD estimates against the composite outcome for nirmatrelvir/ritonavir were 1.21% (95%CI 0.57% to 1.84%) in vaccinated and 1.72% (95%CI 0.59% to 2.85%) in unvaccinated subgroups.Molnupiravir may slightly reduce the composite outcome (RR 0.75, 95%CI 0.67-0.85; I2 = 32%; low certainty). Evidence of effect modification by vaccination status was inconsistent among studies reporting different effect measures (RR Psubgroup = 0.78; HR Psubgroup = 0.08). In two studies, RD against the composite outcome for molnupiravir were -0.01% (95%CI -1.13% to 1.10%) in vaccinated and 1.73% (95%CI -2.08% to 5.53%) in unvaccinated subgroups. CONCLUSIONS Among cohort studies of non-hospitalized adults with COVID-19, nirmatrelvir/ritonavir is effective against the composite outcome of severe COVID-19 independent of vaccination status. Further research and a reassessment of molnupiravir use among vaccinated adults are warranted. REGISTRATION PROSPERO CRD42023429232.
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Affiliation(s)
- Yonatan M Mesfin
- School of Public Health, LKS Faculty of Medicine, World Health Organization Collaborating Centre for Infectious Disease Epidemiology and Control, The University of Hong Kong, Hong Kong Special Administration Region, Hong Kong, China
- Immunity & Global Health, Murdoch Children's Research Institute (MCRI), Parkville, VIC, Australia
| | - Joseph E Blais
- School of Public Health, LKS Faculty of Medicine, World Health Organization Collaborating Centre for Infectious Disease Epidemiology and Control, The University of Hong Kong, Hong Kong Special Administration Region, Hong Kong, China
- Laboratory of Data Discovery for Health (D24H), Hong Kong Science and Technology Park, New Territories, Hong Kong Special Administration Region, Hong Kong, China
- Centre for Safe Medication Practice and Research, Department of Pharmacology and Pharmacy, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administration Region, Hong Kong, China
| | - Kelemu Tilahun Kibret
- Global Centre for Preventive Health and Nutrition, Deakin University, Geelong, VIC, Australia
| | - Teketo Kassaw Tegegne
- Institute for Physical Activity and Nutrition, Deakin University, Geelong, VIC, Australia
| | - Benjamin J Cowling
- School of Public Health, LKS Faculty of Medicine, World Health Organization Collaborating Centre for Infectious Disease Epidemiology and Control, The University of Hong Kong, Hong Kong Special Administration Region, Hong Kong, China
- Laboratory of Data Discovery for Health (D24H), Hong Kong Science and Technology Park, New Territories, Hong Kong Special Administration Region, Hong Kong, China
| | - Peng Wu
- School of Public Health, LKS Faculty of Medicine, World Health Organization Collaborating Centre for Infectious Disease Epidemiology and Control, The University of Hong Kong, Hong Kong Special Administration Region, Hong Kong, China
- Laboratory of Data Discovery for Health (D24H), Hong Kong Science and Technology Park, New Territories, Hong Kong Special Administration Region, Hong Kong, China
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Focosi D, Franchini M, Maggi F, Shoham S. COVID-19 therapeutics. Clin Microbiol Rev 2024:e0011923. [PMID: 38771027 DOI: 10.1128/cmr.00119-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024] Open
Abstract
SUMMARYSince the emergence of COVID-19 in 2020, an unprecedented range of therapeutic options has been studied and deployed. Healthcare providers have multiple treatment approaches to choose from, but efficacy of those approaches often remains controversial or compromised by viral evolution. Uncertainties still persist regarding the best therapies for high-risk patients, and the drug pipeline is suffering fatigue and shortage of funding. In this article, we review the antiviral activity, mechanism of action, pharmacokinetics, and safety of COVID-19 antiviral therapies. Additionally, we summarize the evidence from randomized controlled trials on efficacy and safety of the various COVID-19 antivirals and discuss unmet needs which should be addressed.
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Affiliation(s)
- Daniele Focosi
- North-Western Tuscany Blood Bank, Pisa University Hospital, Pisa, Italy
| | - Massimo Franchini
- Division of Hematology and Transfusion Medicine, Carlo Poma Hospital, Mantua, Italy
| | - Fabrizio Maggi
- National Institute for Infectious Diseases "Lazzaro Spallanzani" IRCCS, Rome, Italy
| | - Shmuel Shoham
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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Ameratunga R, Jordan A, Lehnert K, Leung E, Mears ER, Snell R, Steele R, Woon ST. SARS-CoV-2 evolution has increased resistance to monoclonal antibodies and first-generation COVID-19 vaccines: Is there a future therapeutic role for soluble ACE2 receptors for COVID-19? Antiviral Res 2024; 227:105894. [PMID: 38677595 DOI: 10.1016/j.antiviral.2024.105894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 04/17/2024] [Accepted: 04/22/2024] [Indexed: 04/29/2024]
Abstract
COVID-19 has caused calamitous health, economic and societal consequences. Although several COVID-19 vaccines have received full authorization for use, global deployment has faced political, financial and logistical challenges. The efficacy of first-generation COVID-19 vaccines is waning and breakthrough infections are allowing ongoing transmission and evolution of SARS-CoV-2. Furthermore, COVID-19 vaccine efficacy relies on a functional immune system. Despite receiving three primary doses and three or more heterologous boosters, some immunocompromised patients may not be adequately protected by COVID-19 vaccines and remain vulnerable to severe disease. The evolution of new SARS-CoV-2 variants has also resulted in the rapid obsolescence of monoclonal antibodies. Convalescent plasma from COVID-19 survivors has produced inconsistent results. New drugs such as Paxlovid (nirmatrelvir/ritonavir) are beyond the reach of low- and middle-income countries. With widespread use of Paxlovid, it is likely nirmatrelvir-resistant clades of SARS-CoV-2 will emerge in the future. There is thus an urgent need for new effective anti-SARS-CoV-2 treatments. The in vitro efficacy of soluble ACE2 against multiple SARS-CoV-2 variants including omicron (B.1.1.529), was recently described using a competitive ELISA assay as a surrogate marker for virus neutralization. This indicates soluble wild-type ACE2 receptors are likely to be resistant to viral evolution. Nasal and inhaled treatment with soluble ACE2 receptors has abrogated severe disease in animal models of COVID-19. There is an urgent need for clinical trials of this new class of antiviral therapeutics, which could complement vaccines and Paxlovid.
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Affiliation(s)
- Rohan Ameratunga
- Department of Clinical Immunology, Auckland Hospital, Park Rd, Grafton, 1010, Auckland, New Zealand; Department of Virology and Immunology, Auckland Hospital, Park Rd, Grafton, 1010, Auckland, New Zealand; Department of Molecular Medicine and Pathology, School of Medicine, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.
| | - Anthony Jordan
- Department of Clinical Immunology, Auckland Hospital, Park Rd, Grafton, 1010, Auckland, New Zealand
| | - Klaus Lehnert
- Applied Translational Genetics Group, School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Euphemia Leung
- Auckland Cancer Society Research Centre, School of Medicine, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Emily R Mears
- Applied Translational Genetics Group, School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Russell Snell
- Applied Translational Genetics Group, School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Richard Steele
- Department of Virology and Immunology, Auckland Hospital, Park Rd, Grafton, 1010, Auckland, New Zealand
| | - See-Tarn Woon
- Department of Virology and Immunology, Auckland Hospital, Park Rd, Grafton, 1010, Auckland, New Zealand; Department of Molecular Medicine and Pathology, School of Medicine, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
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Errors in Tables. JAMA Netw Open 2024; 7:e241976. [PMID: 38353957 PMCID: PMC10867676 DOI: 10.1001/jamanetworkopen.2024.1976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/18/2024] Open
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Guermazi D, Arvanitis P, Vieira K, Warner JL, Farmakiotis D. Oral antivirals for COVID-19 among patients with cancer. RESEARCH SQUARE 2024:rs.3.rs-3876022. [PMID: 38343793 PMCID: PMC10854279 DOI: 10.21203/rs.3.rs-3876022/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
Purpose Immunocompromised individuals, such as those diagnosed with cancer, are at a significantly higher risk for severe illness and mortality when infected with SARS-CoV-2 (COVID-19) than the general population. Two oral antiviral treatments are approved for COVID-19: Paxlovid® (nirmatrelvir/ritonavir) and Lagevrio® (molnupiravir). There is a paucity of data regarding the benefit from these antivirals among immunocompromised patients with cancer, and recent studies have questioned their efficacy among vaccinated patients, even those with risk factors for severe COVID-19. Methods We evaluated the efficacy and safety of nirmatrelvir/ritonavir and molnupiravir in preventing severe illness and death using our database of 457 patients with cancer and COVID-19 from Brown University-affiliated hospitals. 67 patients received nirmatrelvir/ritonavir or molnupiravir and were compared to 56 concurrent controls who received no antiviral treatment despite being eligible to receive it. Results Administration of nirmatrelvir/ritonavir or molnupiravir was associated with improved survival and lower 90-day all-cause and COVID-19-attributed mortality (p<0.05) and with lower peak O2 requirements (ordinal odds ratio [OR] 1.52, 95% confidence interval [CI] 0.92-2.56). Conclusion Acknowledging the small size of our sample as a limitation, we concluded that early antiviral treatment might be beneficial to immunocompromised individuals, particularly those with cancer, when infected with SARS-CoV-2. Larger-scale, well-stratified studies are needed in this patient population.
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Affiliation(s)
| | | | - Kendra Vieira
- The Warren Alpert Medical School of Brown University
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Zhao Z, Zhu Q, Zhou X, Li W, Yin X, Li J. Structural Basis for the Inhibition of SARS-CoV-2 M pro D48N Mutant by Shikonin and PF-07321332. Viruses 2023; 16:65. [PMID: 38257765 PMCID: PMC10818409 DOI: 10.3390/v16010065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 12/24/2023] [Accepted: 12/25/2023] [Indexed: 01/24/2024] Open
Abstract
Preventing the spread of SARS-CoV-2 and its variants is crucial in the fight against COVID-19. Inhibition of the main protease (Mpro) of SARS-CoV-2 is the key to disrupting viral replication, making Mpro a promising target for therapy. PF-07321332 and shikonin have been identified as effective broad-spectrum inhibitors of SARS-CoV-2 Mpro. The crystal structures of SARS-CoV-2 Mpro bound to PF-07321332 and shikonin have been resolved in previous studies. However, the exact mechanism regarding how SARS-CoV-2 Mpro mutants impact their binding modes largely remains to be investigated. In this study, we expressed a SARS-CoV-2 Mpro mutant, carrying the D48N substitution, representing a class of mutations located near the active sites of Mpro. The crystal structures of Mpro D48N in complex with PF-07321332 and shikonin were solved. A detailed analysis of the interactions between Mpro D48N and two inhibitors provides key insights into the binding pattern and its structural determinants. Further, the binding patterns of the two inhibitors to Mpro D48N mutant and wild-type Mpro were compared in detail. This study illustrates the possible conformational changes when the Mpro D48N mutant is bound to inhibitors. Structural insights derived from this study will inform the development of new drugs against novel coronaviruses.
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Affiliation(s)
- Zhenyu Zhao
- College of Pharmaceutical Sciences, Gannan Medical University, Ganzhou 341000, China; (Z.Z.); (X.Z.); (W.L.)
| | - Qinyao Zhu
- Applied Biology Laboratory, College of Pharmaceutical and Biological Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China;
| | - Xuelan Zhou
- College of Pharmaceutical Sciences, Gannan Medical University, Ganzhou 341000, China; (Z.Z.); (X.Z.); (W.L.)
| | - Wenwen Li
- College of Pharmaceutical Sciences, Gannan Medical University, Ganzhou 341000, China; (Z.Z.); (X.Z.); (W.L.)
| | - Xiushan Yin
- Applied Biology Laboratory, College of Pharmaceutical and Biological Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China;
| | - Jian Li
- College of Pharmaceutical Sciences, Gannan Medical University, Ganzhou 341000, China; (Z.Z.); (X.Z.); (W.L.)
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