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Shawe-Taylor M, Greenwood D, Hobbs A, Dowgier G, Penn R, Sanderson T, Stevenson-Leggett P, Bazire J, Harvey R, Libri V, Kassiotis G, Gamblin S, Lewis NS, Williams B, Swanton C, Gandhi S, Carr EJ, Wu MY, Bauer DLV, Wall EC. Divergent performance of vaccines in the UK autumn 2023 COVID-19 booster campaign. Lancet 2024; 403:1133-1136. [PMID: 38484752 DOI: 10.1016/s0140-6736(24)00316-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 02/12/2024] [Accepted: 02/14/2024] [Indexed: 03/25/2024]
Affiliation(s)
- Marianne Shawe-Taylor
- The Francis Crick Institute, London NW1 1AT, UK; National Institute for Health Research (NIHR) University College London Hospitals (UCLH) Biomedical Research Centre and NIHR UCLH Clinical Research Facility, London, UK
| | | | | | | | | | | | | | | | - Ruth Harvey
- Worldwide Influenza Centre, London NW1 1AT, UK
| | - Vincenzo Libri
- National Institute for Health Research (NIHR) University College London Hospitals (UCLH) Biomedical Research Centre and NIHR UCLH Clinical Research Facility, London, UK
| | - George Kassiotis
- The Francis Crick Institute, London NW1 1AT, UK; Department of Infectious Disease, St Mary's Hospital, Imperial College London, London, UK
| | | | | | - Bryan Williams
- National Institute for Health Research (NIHR) University College London Hospitals (UCLH) Biomedical Research Centre and NIHR UCLH Clinical Research Facility, London, UK; University College London, London, UK
| | - Charles Swanton
- The Francis Crick Institute, London NW1 1AT, UK; University College London, London, UK
| | - Sonia Gandhi
- The Francis Crick Institute, London NW1 1AT, UK; University College London, London, UK
| | - Edward J Carr
- The Francis Crick Institute, London NW1 1AT, UK; University College London, London, UK
| | - Mary Y Wu
- The Francis Crick Institute, London NW1 1AT, UK
| | - David L V Bauer
- The Francis Crick Institute, London NW1 1AT, UK; Genotype-to-Phenotype 2 Consortium (G2P2-UK), UK
| | - Emma C Wall
- The Francis Crick Institute, London NW1 1AT, UK; National Institute for Health Research (NIHR) University College London Hospitals (UCLH) Biomedical Research Centre and NIHR UCLH Clinical Research Facility, London, UK.
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Gallucci L, Bazire J, Davidson AD, Shytaj IL. Broad-spectrum antiviral activity of two structurally analogous CYP3A inhibitors against pathogenic human coronaviruses in vitro. Antiviral Res 2024; 221:105766. [PMID: 38042417 DOI: 10.1016/j.antiviral.2023.105766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 11/19/2023] [Accepted: 11/24/2023] [Indexed: 12/04/2023]
Abstract
Coronaviruses pose a permanent risk of outbreaks, with three highly pathogenic species and strains (SARS-CoV, MERS-CoV, SARS-CoV-2) having emerged in the last twenty years. Limited antiviral therapies are currently available and their efficacy in randomized clinical trials enrolling SARS-CoV-2 patients has not been consistent, highlighting the need for more potent treatments. We previously showed that cobicistat, a clinically approved inhibitor of Cytochrome P450-3A (CYP3A), has direct antiviral activity against early circulating SARS-CoV-2 strains in vitro and in Syrian hamsters. Cobicistat is a derivative of ritonavir, which is co-administered as pharmacoenhancer with the SARS-CoV-2 protease inhibitor nirmatrelvir, to inhibit its metabolization by CPY3A and preserve its antiviral efficacy. Here, we used automated image analysis for a screening and parallel comparison of the anti-coronavirus effects of cobicistat and ritonavir. Our data show that both drugs display antiviral activity at low micromolar concentrations against multiple SARS-CoV-2 variants in vitro, including epidemiologically relevant Omicron subvariants. Despite their close structural similarity, we found that cobicistat is more potent than ritonavir, as shown by significantly lower EC50 values in monotherapy and higher levels of viral suppression when used in combination with nirmatrelvir. Finally, we show that the antiviral activity of both cobicistat and ritonavir is maintained against other human coronaviruses, including HCoV-229E and the highly pathogenic MERS-CoV. Overall, our results demonstrate that cobicistat has more potent anti-coronavirus activity than ritonavir and suggest that dose adjustments could pave the way to the use of both drugs as broad-spectrum antivirals against highly pathogenic human coronaviruses.
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Affiliation(s)
- Lara Gallucci
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, UK
| | - James Bazire
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, UK
| | - Andrew D Davidson
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, UK.
| | - Iart Luca Shytaj
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, UK.
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Haddrell A, Otero-Fernandez M, Oswin H, Cogan T, Bazire J, Tian J, Alexander R, Mann JFS, Hill D, Finn A, Davidson AD, Reid JP. Differences in airborne stability of SARS-CoV-2 variants of concern is impacted by alkalinity of surrogates of respiratory aerosol. J R Soc Interface 2023; 20:20230062. [PMID: 37340783 DOI: 10.1098/rsif.2023.0062] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2023] Open
Abstract
The mechanistic factors hypothesized to be key drivers for the loss of infectivity of viruses in the aerosol phase often remain speculative. Using a next-generation bioaerosol technology, we report measurements of the aero-stability of several SARS-CoV-2 variants of concern in aerosol droplets of well-defined size and composition at high (90%) and low (40%) relative humidity (RH) upwards of 40 min. When compared with the ancestral virus, the infectivity of the Delta variant displayed different decay profiles. At low RH, a loss of viral infectivity of approximately 55% was observed over the initial 5 s for both variants. Regardless of RH and variant, greater than 95% of the viral infectivity was lost after 40 min of being aerosolized. Aero-stability of the variants correlate with their sensitivities to alkaline pH. Removal of all acidic vapours dramatically increased the rate of infectivity decay, with 90% loss after 2 min, while the addition of nitric acid vapour improved aero-stability. Similar aero-stability in droplets of artificial saliva and growth medium was observed. A model to predict loss of viral infectivity is proposed: at high RH, the high pH of exhaled aerosol drives viral infectivity loss; at low RH, high salt content limits the loss of viral infectivity.
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Affiliation(s)
- Allen Haddrell
- School of Chemistry, Cantock's Close, University of Bristol, Bristol, UK
| | | | - Henry Oswin
- School of Chemistry, Cantock's Close, University of Bristol, Bristol, UK
| | - Tristan Cogan
- Bristol Veterinary School, University of Bristol, Langford House, Langford, Bristol, UK
| | - James Bazire
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, UK
| | - Jianghan Tian
- School of Chemistry, Cantock's Close, University of Bristol, Bristol, UK
| | - Robert Alexander
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, UK
| | - Jamie F S Mann
- Bristol Veterinary School, University of Bristol, Langford House, Langford, Bristol, UK
| | - Darryl Hill
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, UK
| | - Adam Finn
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, UK
- School of Population Health Sciences, University of Bristol, Bristol, UK
| | - Andrew D Davidson
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, UK
| | - Jonathan P Reid
- School of Chemistry, Cantock's Close, University of Bristol, Bristol, UK
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