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Colson P, Bader W, Fantini J, Dudouet P, Levasseur A, Pontarotti P, Devaux C, Raoult D. From viral democratic genomes to viral wild bunch of quasispecies. J Med Virol 2023; 95:e29209. [PMID: 37937701 DOI: 10.1002/jmv.29209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 10/05/2023] [Accepted: 10/19/2023] [Indexed: 11/09/2023]
Abstract
The tremendous majority of RNA genomes from pathogenic viruses analyzed and deposited in databases are consensus or "democratic" genomes. They represent the genomes most frequently found in the clinical samples of patients but do not account for the huge genetic diversity of coexisting genomes, which is better described as quasispecies. A viral quasispecies is defined as the dynamic distribution of nonidentical but closely related mutants, variants, recombinant, or reassortant viral genomes. Viral quasispecies have collective behavior and dynamics and are the subject of internal interactions that comprise interference, complementation, or cooperation. In the setting of SARS-CoV-2 infection, intrahost SARS-CoV-2 genetic diversity was recently notably reported for immunocompromised, chronically infected patients, for patients treated with monoclonal antibodies targeting the viral spike protein, and for different body compartments of a single patient. A question that deserves attention is whether such diversity is generated postinfection from a clonal genome in response to selection pressure or is already present at the time of infection as a quasispecies. In the present review, we summarize the data supporting that hosts are infected by a "wild bunch" of viruses rather than by multiple virions sharing the same genome. Each virion in the "wild bunch" may have different virulence and tissue tropisms. As the number of viruses replicated during host infections is huge, a viral quasispecies at any time of infection is wide and is also influenced by host-specific selection pressure after infection, which accounts for the difficulty in deciphering and predicting the appearance of more fit variants and the evolution of epidemics of novel RNA viruses.
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Affiliation(s)
- Philippe Colson
- IHU Méditerranée Infection, Marseille, France
- Aix-Marseille Université., Institut de Recherche pour le Développement (IRD), Microbes Evolution Phylogeny and Infections (MEPHI), Marseille, France
- Assistance Publique-Hôpitaux de Marseille (AP-HM), Marseille, France
| | - Wahiba Bader
- IHU Méditerranée Infection, Marseille, France
- Aix-Marseille Université., Institut de Recherche pour le Développement (IRD), Microbes Evolution Phylogeny and Infections (MEPHI), Marseille, France
| | - Jacques Fantini
- INSERM UMR_S 1072, Aix-Marseille Université, Marseille, France
| | - Pierre Dudouet
- IHU Méditerranée Infection, Marseille, France
- Aix-Marseille Université., Institut de Recherche pour le Développement (IRD), Microbes Evolution Phylogeny and Infections (MEPHI), Marseille, France
| | - Anthony Levasseur
- IHU Méditerranée Infection, Marseille, France
- Aix-Marseille Université., Institut de Recherche pour le Développement (IRD), Microbes Evolution Phylogeny and Infections (MEPHI), Marseille, France
| | - Pierre Pontarotti
- IHU Méditerranée Infection, Marseille, France
- Department of Biological Sciences, Centre National de la Recherche 16 Scientifique (CNRS)-SNC5039, Marseille, France
| | - Christian Devaux
- IHU Méditerranée Infection, Marseille, France
- Department of Biological Sciences, Centre National de la Recherche 16 Scientifique (CNRS)-SNC5039, Marseille, France
| | - Didier Raoult
- IHU Méditerranée Infection, Marseille, France
- Aix-Marseille Université., Institut de Recherche pour le Développement (IRD), Microbes Evolution Phylogeny and Infections (MEPHI), Marseille, France
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Dudouet P, Colson P, Aherfi S, Levasseur A, Beye M, Delerce J, Burel E, Lavrard P, Bader W, Lagier JC, Fournier PE, La Scola B, Raoult D. SARS-CoV-2 quasi-species analysis from patients with persistent nasopharyngeal shedding. Sci Rep 2022; 12:18721. [PMID: 36333340 PMCID: PMC9636146 DOI: 10.1038/s41598-022-22060-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 10/10/2022] [Indexed: 11/06/2022] Open
Abstract
At the time of a new and unprecedented viral pandemic, many questions are being asked about the genomic evolution of SARS-CoV-2 and the emergence of different variants, leading to therapeutic and immune evasion and survival of this genetically highly labile RNA virus. The nasopharyngeal persistence of infectious virus beyond 17 days proves its constant interaction with the human immune system and increases the intra-individual mutational possibilities. We performed a prospective high-throughput sequencing study (ARTIC Nanopore) of SARS-CoV-2 from so-called "persistent" patients, comparing them with a non-persistent population, and analyzing the quasi-species present in a single sample at time t. Global intra-individual variability in persistent patients was found to be higher than in controls (mean 5.3%, Standard deviation 0.9 versus 4.6% SD 0.3, respectively, p < 0.001). In the detailed analysis, we found a greater difference between persistent and non-persistent patients with non-severe COVID 19, and between the two groups infected with clade 20A. Furthermore, we found minority N501Y and P681H mutation clouds in all patients, with no significant differences found both groups. The question of the SARS-CoV-2 viral variants' genesis remains to be further investigated, with the need to prevent new viral propagations and their consequences, and quasi-species analysis could be an important key to watch out.
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Affiliation(s)
- Pierre Dudouet
- grid.483853.10000 0004 0519 5986IHU Méditerranée Infection, 19-21 Boulevard Jean Moulin, 13005 Marseille, France ,grid.5399.60000 0001 2176 4817Microbes Evolution Phylogeny and Infections (MEPHI), Institut de Recherche Pour Le Développement (IRD), Assistance Publique-Hôpitaux de Marseille (AP-HM), MEPHI, Aix-Marseille Univ., 27 Boulevard Jean Moulin, 13005 Marseille, France
| | - Philippe Colson
- grid.483853.10000 0004 0519 5986IHU Méditerranée Infection, 19-21 Boulevard Jean Moulin, 13005 Marseille, France ,grid.5399.60000 0001 2176 4817Microbes Evolution Phylogeny and Infections (MEPHI), Institut de Recherche Pour Le Développement (IRD), Assistance Publique-Hôpitaux de Marseille (AP-HM), MEPHI, Aix-Marseille Univ., 27 Boulevard Jean Moulin, 13005 Marseille, France
| | - Sarah Aherfi
- grid.483853.10000 0004 0519 5986IHU Méditerranée Infection, 19-21 Boulevard Jean Moulin, 13005 Marseille, France ,grid.5399.60000 0001 2176 4817Microbes Evolution Phylogeny and Infections (MEPHI), Institut de Recherche Pour Le Développement (IRD), Assistance Publique-Hôpitaux de Marseille (AP-HM), MEPHI, Aix-Marseille Univ., 27 Boulevard Jean Moulin, 13005 Marseille, France
| | - Anthony Levasseur
- grid.483853.10000 0004 0519 5986IHU Méditerranée Infection, 19-21 Boulevard Jean Moulin, 13005 Marseille, France ,grid.5399.60000 0001 2176 4817Microbes Evolution Phylogeny and Infections (MEPHI), Institut de Recherche Pour Le Développement (IRD), Assistance Publique-Hôpitaux de Marseille (AP-HM), MEPHI, Aix-Marseille Univ., 27 Boulevard Jean Moulin, 13005 Marseille, France
| | - Mamadou Beye
- grid.483853.10000 0004 0519 5986IHU Méditerranée Infection, 19-21 Boulevard Jean Moulin, 13005 Marseille, France
| | - Jeremy Delerce
- grid.483853.10000 0004 0519 5986IHU Méditerranée Infection, 19-21 Boulevard Jean Moulin, 13005 Marseille, France
| | - Emilie Burel
- grid.483853.10000 0004 0519 5986IHU Méditerranée Infection, 19-21 Boulevard Jean Moulin, 13005 Marseille, France
| | - Philippe Lavrard
- grid.483853.10000 0004 0519 5986IHU Méditerranée Infection, 19-21 Boulevard Jean Moulin, 13005 Marseille, France ,grid.5399.60000 0001 2176 4817Vecteurs-Infections Tropicales et Méditerranéennes (VITROME), Aix-Marseille Univ, Marseille, France
| | - Wahiba Bader
- grid.483853.10000 0004 0519 5986IHU Méditerranée Infection, 19-21 Boulevard Jean Moulin, 13005 Marseille, France ,grid.5399.60000 0001 2176 4817Microbes Evolution Phylogeny and Infections (MEPHI), Institut de Recherche Pour Le Développement (IRD), Assistance Publique-Hôpitaux de Marseille (AP-HM), MEPHI, Aix-Marseille Univ., 27 Boulevard Jean Moulin, 13005 Marseille, France
| | - Jean-Christophe Lagier
- grid.483853.10000 0004 0519 5986IHU Méditerranée Infection, 19-21 Boulevard Jean Moulin, 13005 Marseille, France ,grid.5399.60000 0001 2176 4817Microbes Evolution Phylogeny and Infections (MEPHI), Institut de Recherche Pour Le Développement (IRD), Assistance Publique-Hôpitaux de Marseille (AP-HM), MEPHI, Aix-Marseille Univ., 27 Boulevard Jean Moulin, 13005 Marseille, France
| | - Pierre-Edouard Fournier
- grid.483853.10000 0004 0519 5986IHU Méditerranée Infection, 19-21 Boulevard Jean Moulin, 13005 Marseille, France ,grid.5399.60000 0001 2176 4817Vecteurs-Infections Tropicales et Méditerranéennes (VITROME), Aix-Marseille Univ, Marseille, France
| | - Bernard La Scola
- grid.483853.10000 0004 0519 5986IHU Méditerranée Infection, 19-21 Boulevard Jean Moulin, 13005 Marseille, France ,grid.5399.60000 0001 2176 4817Microbes Evolution Phylogeny and Infections (MEPHI), Institut de Recherche Pour Le Développement (IRD), Assistance Publique-Hôpitaux de Marseille (AP-HM), MEPHI, Aix-Marseille Univ., 27 Boulevard Jean Moulin, 13005 Marseille, France
| | - Didier Raoult
- grid.483853.10000 0004 0519 5986IHU Méditerranée Infection, 19-21 Boulevard Jean Moulin, 13005 Marseille, France ,grid.5399.60000 0001 2176 4817Microbes Evolution Phylogeny and Infections (MEPHI), Institut de Recherche Pour Le Développement (IRD), Assistance Publique-Hôpitaux de Marseille (AP-HM), MEPHI, Aix-Marseille Univ., 27 Boulevard Jean Moulin, 13005 Marseille, France
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