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Minet C, Chantal I, Berthier D. Recent advances in genome editing of bloodstream forms of Trypanosoma congolense using CRISPR-Cas9 ribonucleoproteins: Proof of concept. Exp Parasitol 2023; 252:108589. [PMID: 37516291 DOI: 10.1016/j.exppara.2023.108589] [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: 03/15/2023] [Revised: 06/26/2023] [Accepted: 07/24/2023] [Indexed: 07/31/2023]
Abstract
African Animal Trypanosomosis (AAT or Nagana) is a vector-borne disease caused by Trypanosomatidae, genus Trypanosoma. The disease is transmitted by the bite of infected hematophagous insects, mainly tsetse flies but also other blood-sucking insects including stomoxes and tabanids. Although many trypanosome species infect animals, the main agents responsible for this disease with a strong socio-economic and veterinary health impact are Trypanosoma congolense (T. congolense or Tc), Trypanosoma vivax (T.vivax), and to a lesser extent, Trypanosoma brucei brucei (T.brucei brucei or Tbb). These parasites mainly infect livestock, including cattle, in sub-Saharan Africa, with major repercussions in terms of animal productivity and poverty for populations which are often already very poor. As there is currently no vaccine, the fight against the disease is primarily based on diagnosis, treatment and vector control. To develop new tools (particularly therapeutic tools) to fight against the disease, we need to know both the biology and the genes involved in the pathogenicity and virulence of the parasites. To date, unlike for Trypanosoma brucei (T.brucei) or Trypanosoma cruzi (T.cruzi), genome editing tools has been relatively little used to study T. congolense. We present an efficient, reproducible and stable CRISPR-Cas9 genome editing system for use in Tc bloodstream forms (Tc-BSF). This plasmid-free system is based on transient expression of Cas9 protein and the use of a ribonucleoprotein formed by the Cas9 and sgRNA complex. This is the first proof of concept of genome editing using CRISPR-Cas9 ribonucleoproteins on Tc-BSF. This adapted protocol enriches the "toolbox" for the functional study of genes of interest in blood forms of the Trypanosoma congolense. This proof of concept is an important step for the scientific community working on the study of trypanosomes and opens up new perspectives for the control of and fight against animal trypanosomosis.
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Affiliation(s)
- Cécile Minet
- CIRAD, UMR INTERTRYP, F-34398, Montpellier, France; INTERTRYP, Univ Montpellier, CIRAD, IRD, Montpellier, France.
| | - Isabelle Chantal
- CIRAD, UMR INTERTRYP, F-34398, Montpellier, France; INTERTRYP, Univ Montpellier, CIRAD, IRD, Montpellier, France
| | - David Berthier
- CIRAD, UMR INTERTRYP, F-34398, Montpellier, France; INTERTRYP, Univ Montpellier, CIRAD, IRD, Montpellier, France
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Ferrari A, Parente F, Iudica G, Porretto M, Simonetta D, Minet C, Mosca S, Panatto D, Orsi A, Icardi G. The impact of SARS-CoV-2 on emergency health care in a referral acute-care center in northern Italy. Eur J Public Health 2022. [DOI: 10.1093/eurpub/ckac129.540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
To assess how SARS-CoV-2 has changed the demand for in-person health care, we retrospectively analyzed data on access to the emergency department (ED) of San Martino Hospital, the referral acute-care center in the Liguria region (Northwest Italy). 181,699 records of patients diagnosed with an ICD-9 code between 2019 and 2021 were considered. In comparison to pre-pandemic levels, following the introduction of social distancing measures, the median number of ED visits declined by 41.4% in 2020 and by 28.1% in 2021. The period of maximum drop in access (-58.6%) corresponded to the 2020 11-12th calendar weeks and coincided with the highest rates of COVID-like illness - defined as either ILI or LRTI cases - identified through an operator-dependent syndromic surveillance system (+340%; 19.5% of total ED attendances). In terms of relative impact, in 2020 and 2021 non-urgent ED codes decreased (by 6.7% and 7.3%) and both urgent and emergency ED codes increased (by 4.8% and 3.8% the former; 5.5% and 8.8% the latter), even so, the absolute number of ED access fell drastically for all codes. Urgent codes, in particular, experienced the most severe decrease, shifting from a pre-pandemic value of 25,009 to 18,826 in 2020 and 19,528 in 2021. With regards to diagnosis, in 2020, respiratory infections saw the highest increase (+3.3%) while traumas and eye diseases saw the highest decrease (-1.1% and -3.8%, respectively). This trend reversed in 2021 during which respiratory infections decreased (-2.2%) and traumas increased (+2.2%). Despite the admissions of males and the elderly being routinely lower, these categories experienced the greatest increase in access for respiratory infections: +3.9% and +10.1% in 2020; +2.8% and +7.4% in 2021. While reduction of non-urgent ED visits indicates that the high pre-pandemic access levels may have been avoidable, the significant decline in non-COVID-19 urgent accesses potentially points to an increase in delayed and missed care.
Key messages
• During the COVID-19 pandemic – possibly due to fear and underestimation of symptoms – there was an overall reduction in ED accesses that potentially points to an increase in delayed or missed care.
• The reduction in non-urgent attendances indicates that high pre-pandemic accesses may have been avoidable and that a reduction in unnecessary ED visits is an attainable goal for healthcare systems.
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Affiliation(s)
- A Ferrari
- Department of Health Sciences, University of Genoa , Genoa, Italy
| | - F Parente
- Department of Health Sciences, University of Genoa , Genoa, Italy
| | - G Iudica
- Department of Health Sciences, University of Genoa , Genoa, Italy
| | - M Porretto
- Department of Health Sciences, University of Genoa , Genoa, Italy
| | - D Simonetta
- Department of Health Sciences, University of Genoa , Genoa, Italy
| | - C Minet
- Department of Health Sciences, University of Genoa , Genoa, Italy
| | - S Mosca
- Interuniversity Center on Influenza and Other Transmissible Infections , Genoa, Italy
| | - D Panatto
- Department of Health Sciences, University of Genoa , Genoa, Italy
- Interuniversity Center on Influenza and Other Transmissible Infections , Genoa, Italy
| | - A Orsi
- Department of Health Sciences, University of Genoa , Genoa, Italy
- Interuniversity Center on Influenza and Other Transmissible Infections , Genoa, Italy
- Ospedale Policlinico San Martino IRCCS , Genoa, Italy
| | - G Icardi
- Department of Health Sciences, University of Genoa , Genoa, Italy
- Interuniversity Center on Influenza and Other Transmissible Infections , Genoa, Italy
- Ospedale Policlinico San Martino IRCCS , Genoa, Italy
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3
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Chantal I, Minet C, Berthier D. In vitro cultivation of Trypanosoma congolense bloodstream forms: State of the art and advances. Vet Parasitol 2021; 299:109567. [PMID: 34534912 DOI: 10.1016/j.vetpar.2021.109567] [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: 03/29/2021] [Revised: 08/30/2021] [Accepted: 08/31/2021] [Indexed: 11/19/2022]
Abstract
Animal African Trypanosomosis (AAT or Nagana) is a severe vector-borne disease caused by protozoan parasites belonging to the Trypanosomatidae family and is usually cyclically transmitted by blood-sucking tsetse flies. AAT remains a major problem in sub-Saharan Africa. Among the main AAT causative agents, Trypanosoma congolense (T. congolense or Tc) is one of the most important trypanosome species, in terms of economic and animal health impacts, infecting cattle and a wide range of animal hosts as well. To advance in AAT prevention and control, it is essential to better understand trypanosome biology and pathogenesis using bloodstream form (BSF) in vitro culture. The in vitro cultivation of T. congolense IL3000 BSF strain is already well established and widely used in research studies and drug activity assays. However, it may probably no longer truly reflect the reality of field trypanosome strains, due to decades of use and subsequent modifications. Here, we propose a novel culture protocol that supports the long-term in vitro growth of the animal-infective BSFs of three Savannah and Forest types of T. congolense strains, including T. congolense clone IL1180, which is not only a field strain but also a commonly-used reference strain in experimental animal assays. We established a homemade culture medium which made it possible to sustain T. congolense IL1180 growth from infected mouse blood for 18 days in axenic conditions. Moreover, we developed an efficient freezing/thawing system that allowed, for the first time, T. congolense IL1180 BSF growth within 30 days after thawing. Our results on T. congolense adaptation to in vitro culture are encouraging for future gene studies using new molecular tools or for new therapeutic drug assays.
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Affiliation(s)
- I Chantal
- CIRAD, UMR INTERTRYP, F-34398, Montpellier, France; INTERTRYP, Univ Montpellier, CIRAD, IRD, Montpellier, France.
| | - C Minet
- CIRAD, UMR INTERTRYP, F-34398, Montpellier, France; INTERTRYP, Univ Montpellier, CIRAD, IRD, Montpellier, France
| | - D Berthier
- CIRAD, UMR INTERTRYP, F-34398, Montpellier, France; INTERTRYP, Univ Montpellier, CIRAD, IRD, Montpellier, France
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Arias MH, Quiliano M, Bourgeade-Delmas S, Fabing I, Chantal I, Berthier D, Minet C, Eparvier V, Sorres J, Stien D, Galiano S, Aldana I, Valentin A, Garavito G, Deharo E. Alsinol, an arylamino alcohol derivative active against Plasmodium, Babesia, Trypanosoma, and Leishmania: past and new outcomes. Parasitol Res 2020; 119:3503-3515. [PMID: 32772176 DOI: 10.1007/s00436-020-06832-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 07/26/2020] [Indexed: 12/14/2022]
Abstract
Malaria, babesiosis, trypanosomosis, and leishmaniasis are some of the most life-threatening parasites, but the range of drugs to treat them is limited. An effective, safe, and low-cost drug with a large activity spectrum is urgently needed. For this purpose, an aryl amino alcohol derivative called Alsinol was resynthesized, screened in silico, and tested against Plasmodium, Babesia, Trypanosoma, and Leishmania. In silico Alsinol follows the Lipinski and Ghose rules. In vitro it had schizontocidal activity against Plasmodium falciparum and was able to inhibit gametocytogenesis; it was particularly active against late gametocytes. In malaria-infected mice, it showed a dose-dependent activity similar to chloroquine. It demonstrated a similar level of activity to reference compounds against Babesia divergens, and against promastigotes, and amastigotes stages of Leishmania in vitro. It inhibited the in vitro growth of two African animal strains of Trypanosoma but was ineffective in vivo in our experimental conditions. It showed moderate toxicity in J774A1 and Vero cell models. The study demonstrated that Alsinol has a large spectrum of activity and is potentially affordable to produce. Nevertheless, challenges remain in the process of scaling up synthesis, creating a suitable clinical formulation, and determining the safety margin in preclinical models.
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Affiliation(s)
- Maria H Arias
- Facultad de Ciencias, Departamento de Farmacia, Grupo de Investigación FaMeTra (Farmacología de la Medicina Tradicional y Popular), Universidad Nacional de Colombia, Sede Bogotá, Carrera 30 45-03, Bogotá D.C., 111321, Colombia
| | - Miguel Quiliano
- Faculty of Health Sciences, Centre for Research and Innovation, Universidad Peruana de Ciencias Aplicadas (UPC), 15023, Lima, Peru
| | - Sandra Bourgeade-Delmas
- UMR 152 PHARMA-DEV, Institut de Recherche pour le Développement IRD, Université de Toulouse UPS, Toulouse, France
| | - Isabelle Fabing
- Laboratoire de Synthèse et Physicochimie de Molécules d'Intérêt Biologique (SPCMIB), Centre National de la Recherche Scientifique (CNRS), 31062, Cedex 09, Toulouse, France
| | - Isabelle Chantal
- UMR INTERTRYP, CIRAD, F-34398, Montpellier, France.,INTERTRYP, Univ Montpellier, CIRAD, IRD, Montpellier, France
| | - David Berthier
- UMR INTERTRYP, CIRAD, F-34398, Montpellier, France.,INTERTRYP, Univ Montpellier, CIRAD, IRD, Montpellier, France
| | - Cécile Minet
- UMR INTERTRYP, CIRAD, F-34398, Montpellier, France.,INTERTRYP, Univ Montpellier, CIRAD, IRD, Montpellier, France
| | - Veronique Eparvier
- ICSN-CNRS UPR 2301 Équipe "Métabolites de végétaux et micro-organismes associés: isolement, synthèse et bioactivité", 91198 cedex, Gif-sur-Yvette, France
| | - Jonathan Sorres
- ICSN-CNRS UPR 2301 Équipe "Métabolites de végétaux et micro-organismes associés: isolement, synthèse et bioactivité", 91198 cedex, Gif-sur-Yvette, France
| | - Didier Stien
- Laboratoire de Biodiversité et Biotechnologie Microbienne, LBBM, Observatoire Océanologique, CNRS, Sorbonne Université, 66650, Banyuls-sur-mer, France
| | - Silvia Galiano
- Facultad de Farmacia y Nutrición, Departamento de Química Orgánica y Farmacéutica, Universidad de Navarra, Campus Universitario, 31008, Pamplona, Spain
| | - Ignacio Aldana
- Facultad de Farmacia y Nutrición, Departamento de Química Orgánica y Farmacéutica, Universidad de Navarra, Campus Universitario, 31008, Pamplona, Spain
| | - Alexis Valentin
- UMR 152 PHARMA-DEV, Institut de Recherche pour le Développement IRD, Université de Toulouse UPS, Toulouse, France
| | - Giovanny Garavito
- Facultad de Ciencias, Departamento de Farmacia, Grupo de Investigación FaMeTra (Farmacología de la Medicina Tradicional y Popular), Universidad Nacional de Colombia, Sede Bogotá, Carrera 30 45-03, Bogotá D.C., 111321, Colombia.
| | - Eric Deharo
- UMR 152 PHARMA-DEV, Institut de Recherche pour le Développement IRD, Université de Toulouse UPS, Toulouse, France.,Institut de Recherche pour le Développement, Représentation IRD Ban Nasay, Saysettha District, P.O. Box 5992, Vientiane, Lao People's Democratic Republic
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5
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Comerlato J, Albina E, Puech C, Franco AC, Minet C, Eloiflin RJ, Rodrigues V, Servan de Almeida R. Identification of a murine cell line that distinguishes virulent from attenuated isolates of the morbillivirus Peste des Petits Ruminants, a promising tool for virulence studies. Virus Res 2020; 286:198035. [PMID: 32461190 DOI: 10.1016/j.virusres.2020.198035] [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: 05/20/2020] [Revised: 05/20/2020] [Accepted: 05/20/2020] [Indexed: 11/18/2022]
Abstract
Comprehensive pathogenesis studies on Peste des Petits Ruminants virus (PPRV) have been delayed so far by the absence of a small animal model reproducing the disease or an in vitro biological system revealing virulence differences. In this study, a mouse 10T1/2 cell line has been identified as presenting different susceptibility to virulent and attenuated PPRV strains. As evidenced by immunofluorescence test and RT-PCR, both virulent and attenuated PPR viruses penetrated and initiated the replication cycle in 10T1/2 cells, independently of the presence of the SLAM goat receptor. However, only virulent strains successfully completed their replication cycle while the vaccine strains did not. Since 10T1/2 cells are interferon-producing cells, the role of the type I interferon (type I IFN) response on this differentiated replication between virulent and attenuated strains was verified by stimulation or repression. Modulation of the type I IFN response did not improve the replication of the vaccine strains, indicating that other cell factor(s) not yet established may hinder the replication of attenuated PPRV in 10T1/2. This 10T1/2 cell line can be proposed as a new in vitro tool for PPRV-host interaction and virulence studies.
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Affiliation(s)
- Juliana Comerlato
- CIRAD, UMR ASTRE, F-34398, Montpellier, France; Laboratório de Virologia, Departamento de Microbiologia, Imunologia e Parasitologia, ICBS UFRGS. Rua Sarmento Leite, 500, Porto Alegre. CEP 90050-170, RS, Brazil
| | - Emmanuel Albina
- CIRAD, UMR ASTRE, F-97170, Petit-Bourg, Guadeloupe, France; ASTRE, CIRAD, INRA, Univ Montpellier, Montpellier, France
| | - Carinne Puech
- INRA, UMR ASTRE, F-34398 Montpellier, France; ASTRE, CIRAD, INRA, Univ Montpellier, Montpellier, France
| | - Ana C Franco
- Laboratório de Virologia, Departamento de Microbiologia, Imunologia e Parasitologia, ICBS UFRGS. Rua Sarmento Leite, 500, Porto Alegre. CEP 90050-170, RS, Brazil
| | - Cécile Minet
- CIRAD, UMR ASTRE, F-34398, Montpellier, France; INTERTRYP, Univ Montpellier, CIRAD, IRD, Montpellier, France
| | | | - Valérie Rodrigues
- CIRAD, UMR ASTRE, F-34398, Montpellier, France; ASTRE, CIRAD, INRA, Univ Montpellier, Montpellier, France
| | - Renata Servan de Almeida
- CIRAD, UMR ASTRE, F-34398, Montpellier, France; ASTRE, CIRAD, INRA, Univ Montpellier, Montpellier, France.
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Minet C, Thévenon S, Chantal I, Solano P, Berthier D. Mini-review on CRISPR-Cas9 and its potential applications to help controlling neglected tropical diseases caused by Trypanosomatidae. Infect Genet Evol 2018; 63:326-331. [PMID: 29486366 DOI: 10.1016/j.meegid.2018.02.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 02/19/2018] [Accepted: 02/22/2018] [Indexed: 12/27/2022]
Abstract
The CRISPR-Cas system, which was originally identified as a prokaryotic defense mechanism, is increasingly being used for the functional study of genes. This technology, which is simple, inexpensive and efficient, has aroused a lot of enthusiasm in the scientific community since its discovery, and every month many publications emanate from very different communities reporting on the use of CRISPR-Cas9. Currently, there are no vaccines to control neglected tropical diseases (NTDs) caused by Trypanosomatidae, particularly Human African Trypanosomiasis (HAT) and Animal African Trypanosomoses (AAT), and treatments are cumbersome and sometimes not effective enough. CRISPR-Cas9 has the potential to functionally analyze new target molecules that could be used for therapeutic and vaccine purposes. In this review, after briefly describing CRIPSR-Cas9 history and how it works, different applications on diseases, especially on parasitic diseases, are reviewed. We then focus the review on the use of CRISPR-Cas9 editing on Trypanosomatidae parasites, the causative agents of NTDs, which are still a terrible burden for human populations in tropical regions, and their vectors.
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MESH Headings
- Animals
- Anopheles/genetics
- Anopheles/parasitology
- CRISPR-Associated Protein 9/genetics
- CRISPR-Associated Protein 9/metabolism
- CRISPR-Cas Systems
- Cattle
- Clustered Regularly Interspaced Short Palindromic Repeats
- Disease Models, Animal
- Drosophila/genetics
- Drosophila/parasitology
- Gene Editing/methods
- Genome, Protozoan
- Leishmania/genetics
- Leishmania/pathogenicity
- Leishmaniasis/parasitology
- Leishmaniasis/prevention & control
- Leishmaniasis/transmission
- Neglected Diseases/parasitology
- Neglected Diseases/prevention & control
- RNA, Guide, CRISPR-Cas Systems/genetics
- RNA, Guide, CRISPR-Cas Systems/metabolism
- Trypanosoma/genetics
- Trypanosoma/pathogenicity
- Trypanosomiasis, African/parasitology
- Trypanosomiasis, African/prevention & control
- Trypanosomiasis, African/transmission
- Trypanosomiasis, Bovine/parasitology
- Trypanosomiasis, Bovine/prevention & control
- Trypanosomiasis, Bovine/transmission
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Affiliation(s)
- Cécile Minet
- CIRAD, UMR INTERTRYP, F-34398 Montpellier, France; INTERTRYP, Univ Montpellier, CIRAD, IRD, Montpellier, France.
| | - Sophie Thévenon
- CIRAD, UMR INTERTRYP, F-34398 Montpellier, France; INTERTRYP, Univ Montpellier, CIRAD, IRD, Montpellier, France.
| | - Isabelle Chantal
- CIRAD, UMR INTERTRYP, F-34398 Montpellier, France; INTERTRYP, Univ Montpellier, CIRAD, IRD, Montpellier, France.
| | - Philippe Solano
- IRD, UMR INTERTRYP IRD, CIRAD, University of Montpellier, F-34398 Montpellier, France.
| | - David Berthier
- CIRAD, UMR INTERTRYP, F-34398 Montpellier, France; INTERTRYP, Univ Montpellier, CIRAD, IRD, Montpellier, France.
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Liu H, Albina E, Gil P, Minet C, de Almeida RS. Two-plasmid system to increase the rescue efficiency of paramyxoviruses by reverse genetics: The example of rescuing Newcastle Disease Virus. Virology 2017; 509:42-51. [PMID: 28595094 DOI: 10.1016/j.virol.2017.06.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 05/28/2017] [Accepted: 06/01/2017] [Indexed: 10/19/2022]
Abstract
Within paramyxoviruses, conventional reverse genetics require the transfection of a minimum of four plasmids: three to reconstruct the viral polymerase complex that replicates and expresses the virus genome delivered by a fourth plasmid. The successful transfection of four or more plasmids of different sizes into one cell and the subsequent generation of at least one viable and replicable viral particle is a rare event, which explains the low rescue efficiency, especially of low virulent viruses with reduced replication efficiency in cell lines. In this study, we report on an improved reverse genetics system developed for an avian paramyxovirus, Newcastle Disease Virus (NDV), in which the number of plasmids was reduced from four to two. Compared to the conventional method, the 2-plasmid system enables earlier and increased production of rescued viruses and, in addition, makes it possible to rescue viruses that it was not possible to rescue using the 4-plasmid system.
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Affiliation(s)
- Haijin Liu
- CIRAD, UMR ASTRE, F-34398 Montpellier, France; INRA, UMR1309 ASTRE, F-34398 Montpellier, France
| | - Emmanuel Albina
- CIRAD, UMR ASTRE, F-97170 Petit-Bourg, Guadeloupe, France; INRA, UMR1309 ASTRE, F-34398 Montpellier, France.
| | - Patricia Gil
- CIRAD, UMR ASTRE, F-34398 Montpellier, France; INRA, UMR1309 ASTRE, F-34398 Montpellier, France
| | - Cécile Minet
- CIRAD, UMR ASTRE, F-34398 Montpellier, France; INRA, UMR1309 ASTRE, F-34398 Montpellier, France; CIRAD, UMR INTERTRYP, F-34398 Montpellier, France
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Cartier J, Potton L, Lugosi M, Hamidfar-Roy R, Bonadona A, Minet C, Ara-Somohano C, Carron P, Schwebel C, Ruckly S, Timsit J. Pronostic vital et rénal à un an des patients encore dialysés en sortie de réanimation. Nephrol Ther 2014. [DOI: 10.1016/j.nephro.2014.07.303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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9
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Toffart AC, Sakhri L, Potton L, Minet C, Guillem P, Schwebel C, Moro-Sibilot D, Timsit JF. Admission en réanimation pour les cancers du poumon: quels patients pour quels bénéfices ? ACTA ACUST UNITED AC 2013. [DOI: 10.1007/s13546-012-0632-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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10
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Vivodtzev I, Minet C, Tamisier R, Arbib F, Borel JC, Baguet JP, Lévy P, Pépin JL. Fiabilité et reproductibilité de la mesure de rigidité artérielle par la vitesse d’onde de pouls chez les patients atteints de bronchopneumopathie chronique obstructive (BPCO) stables. Rev Mal Respir 2013. [DOI: 10.1016/j.rmr.2012.10.223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Albina E, Kwiatek O, Minet C, Lancelot R, Servan de Almeida R, Libeau G. Peste des Petits Ruminants, the next eradicated animal disease? Vet Microbiol 2012; 165:38-44. [PMID: 23313537 DOI: 10.1016/j.vetmic.2012.12.013] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2012] [Revised: 12/03/2012] [Accepted: 12/17/2012] [Indexed: 10/27/2022]
Abstract
Peste des Petits Ruminants (PPR) is a widespread viral disease caused by a Morbillivirus (Paramyxoviridae). There is a single serotype of PPR virus, but four distinct genetic lineages. Morbidity and mortality are high when occurring in naive sheep and goats populations. Cattle and African buffaloes (Syncerus caffer) are asymptomatically infected. Other wild ruminants and camels may express clinical signs and mortality. PPR has recently spread in southern and northern Africa, and in central and far-east Asia. More than one billion sheep and goats worldwide are at risk. PPR is also present in Europe through western Turkey. Because of its clinical incidence and the restrictions on animal movements, PPR is a disease of major economic importance. A live attenuated vaccine was developed in the 1980s, and has been widely used in sheep and goats. Current researches aim (i) to make it more thermotolerant for use in countries with limited cold chain, and (ii) to add a DIVA mark to shorten and reduce the cost of final eradication. Rinderpest virus-another Morbillivirus-was the first animal virus to be eradicated from Earth. PPRV has been proposed as the next candidate. Considering its wide distribution and its multiple target host species which have an intense mobility, it will be a long process that cannot exclusively rely on mass vaccination. PPR specific epidemiological features and socio-economic considerations will also have to be taken into account, and sustained international, coordinated, and funded strategy based on a regional approach of PPR control will be the guarantee toward success.
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Holz CL, Albina E, Minet C, Lancelot R, Kwiatek O, Libeau G, Servan de Almeida R. RNA interference against animal viruses: how morbilliviruses generate extended diversity to escape small interfering RNA control. J Virol 2012; 86:786-95. [PMID: 22072768 PMCID: PMC3255857 DOI: 10.1128/jvi.06210-11] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2011] [Accepted: 10/26/2011] [Indexed: 11/20/2022] Open
Abstract
Viruses are serious threats to human and animal health. Vaccines can prevent viral diseases, but few antiviral treatments are available to control evolving infections. Among new antiviral therapies, RNA interference (RNAi) has been the focus of intensive research. However, along with the development of efficient RNAi-based therapeutics comes the risk of emergence of resistant viruses. In this study, we challenged the in vitro propensity of a morbillivirus (peste des petits ruminants virus), a stable RNA virus, to escape the inhibition conferred by single or multiple small interfering RNAs (siRNAs) against conserved regions of the N gene. Except with the combination of three different siRNAs, the virus systematically escaped RNAi after 3 to 20 consecutive passages. The genetic modifications involved consisted of single or multiple point nucleotide mutations and a deletion of a stretch of six nucleotides, illustrating that this virus has an unusual genomic malleability.
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Nizamani ZA, Keil GM, Albina E, Holz C, Minet C, Kwiatek O, Libeau G, Servan de Almeida R. Potential of adenovirus and baculovirus vectors for the delivery of shRNA against morbilliviruses. Antiviral Res 2011; 90:98-101. [PMID: 21356246 DOI: 10.1016/j.antiviral.2011.02.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2010] [Revised: 01/17/2011] [Accepted: 02/18/2011] [Indexed: 11/30/2022]
Abstract
Morbilliviruses are important pathogens of humans, ruminants, carnivores and marine mammals. Although good vaccines inducing long-term immunity are available, recurrent outbreaks of measles, canine distemper and peste des petits ruminants (PPR) are observed. In control strategies, antivirals thus could be useful to confine virus spread and application of interfering RNAs is a promising approach, provided they can be delivered efficiently into the host cells. We have constructed recombinant adenovirus and baculovirus vectors expressing short hairpin RNAs (shRNAs) against the PPR virus (PPRV) and compared them in vitro. It was found that both recombinant viruses inhibited PPRV replication with the baculovirus vector, which inhibited generation of infectious progeny by more than 2 log10 and the nucleoprotein expression of PPRV by 73%, being the more efficient. The results show that baculoviral shRNA-expressing vectors have the potential for therapeutic use against morbillivirus infections.
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Minet C, Bonadona A, Tabah A, Karkas A, Mescam L, Schwebel C, Hamidfar R, Pison C, Saint-Raymond C, Faure O, Salameire D, Timsit JF. Mucormycose disséminée d’évolution favorable chez une greffée pulmonaire. Rev Mal Respir 2009; 26:998-1002. [DOI: 10.1016/s0761-8425(09)73337-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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15
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Minet C, Yami M, Egzabhier B, Gil P, Tangy F, Brémont M, Libeau G, Diallo A, Albina E. Sequence analysis of the large (L) polymerase gene and trailer of the peste des petits ruminants virus vaccine strain Nigeria 75/1: Expression and use of the L protein in reverse genetics. Virus Res 2009; 145:9-17. [DOI: 10.1016/j.virusres.2009.06.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2008] [Revised: 06/04/2009] [Accepted: 06/05/2009] [Indexed: 10/20/2022]
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Minet C, Kwiatek O, Keita D, Diallo A, Libeau G, Albina E. [Morbillivirus infections of ruminants: the nearly eradicated rinderpest and the "peste des petits ruminants", an expanding disease in the South and a threat for Europe]. Virologie (Montrouge) 2009; 13:103-113. [PMID: 36151635 DOI: 10.1684/13-2.2021.14903] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Rinderpest (RP) and peste des petits ruminants (PPR) are contagious viral diseases of domestic and wild ruminants producing high mortality. They are caused by viruses belonging to the Morbillivirus genus, Paramyxoviridae family. Control tools (vaccines and specific diagnostic tests) exist for these two diseases. They have been successfully used during the global rinderpest eradication programme (GREP) and the disease is expected to be eradicated by 2010. In contrast, a similar programme does not exist for PPR, which is still spreading in Africa and Asia. The persistence of PPR in Turkey and its recent introduction in Morocco, make the disease a real threat for Europe. Improvement of control measures against PPR would benefit from the development of a marker vaccine and its companion serological test, thus allowing the differentiation between infected and vaccinated animals (DIVA vaccines and tests). The recent development of reverse genetics for morbilliviruses offers this new possibility.
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Affiliation(s)
- C Minet
- UMR Cirad/Inra, Contrôles des maladies, 34398 Montpellier, France
| | - O Kwiatek
- UMR Cirad/Inra, Contrôles des maladies, 34398 Montpellier, France
| | - D Keita
- UMR Cirad/Inra, Contrôles des maladies, 34398 Montpellier, France
| | - A Diallo
- Animal Production Unit, FAO/IAEA Agriculture and Biotechnology Laboratory, Agency's Laboratories, Wagramerstrasse 5, P.O. Box 100, A-1400 Vienne, Autriche
| | - G Libeau
- UMR Cirad/Inra, Contrôles des maladies, 34398 Montpellier, France
| | - E Albina
- UMR Cirad/Inra, Contrôles des maladies, 34398 Montpellier, France
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Minet C. Facteurs prédictifs de la fonction endothéliale chez le patient atteint d’une broncho-pneumopathie chronique obstructive. Rev Mal Respir 2008. [DOI: 10.1016/s0761-8425(08)70491-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Diallo A, Minet C, Le Goff C, Berhe G, Albina E, Libeau G, Barrett T. The threat of peste des petits ruminants: progress in vaccine development for disease control. Vaccine 2007; 25:5591-7. [PMID: 17399862 DOI: 10.1016/j.vaccine.2007.02.013] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2006] [Revised: 01/24/2007] [Accepted: 02/02/2007] [Indexed: 10/23/2022]
Abstract
Peste des petits ruminants (PPR) is a highly contagious animal disease caused by a virus in the genus Morbillivirus, family Paramyxoviridae. This infection is responsible for high morbidity and mortality in sheep and goats and in some small wild ruminant species. The huge number of small ruminants, which are reared in the endemic areas makes PPR a serious disease threatening the livelihood of poor farmers. Taking advantage of the closely relationship between rinderpest and PPR viruses, the attenuated rinderpest vaccine was used in the control of PPR. It is now replaced by the homologous attenuated PPR vaccine. Unfortunately, animals that have received this vaccine cannot be distinguished serologically from infected animals. With the advent of DNA recombinant technology, efforts are being made to develop effective PPR marker vaccines to enable such differentiation and which would allow countries to implement both vaccination and disease surveillance programmes at the same time.
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Affiliation(s)
- A Diallo
- Animal Production Unit, FAO/IAEA Agriculture and Biotechnology Laboratory, Agency's Laboratories, Wagramerstrasse 5, P.O. Box 100, A-1400 Vienna, Austria.
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Kwiatek O, Minet C, Grillet C, Hurard C, Carlsson E, Karimov B, Albina E, Diallo A, Libeau G. Peste des Petits Ruminants (PPR) Outbreak in Tajikistan. J Comp Pathol 2007; 136:111-9. [PMID: 17321539 DOI: 10.1016/j.jcpa.2006.12.002] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2006] [Accepted: 12/18/2006] [Indexed: 11/19/2022]
Abstract
The occurrence of outbreaks of peste des petits ruminants (PPR) in three districts of Tajikistan is described. The causal strain (PPR Tajikistan) was characterized and the sequence of its N gene was compared with that of 43 other strains isolated since 1968 in Africa, the Middle East and Asia. The study demonstrated (1) the value of the N gene as a target in comparing isolates obtained over an extended period of evolution, and (2) that clustering was related to the geographical origin of strains.
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Affiliation(s)
- O Kwiatek
- CIRAD, Département EMVT, UPR15, FAO/OIE Reference Laboratory for Peste des Petits Ruminants, TA 30/G, Campus International de Baillarguet, 34398 Montpellier Cedex 5, France
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Berhe G, Minet C, Le Goff C, Barrett T, Ngangnou A, Grillet C, Libeau G, Fleming M, Black DN, Diallo A. Development of a dual recombinant vaccine to protect small ruminants against peste-des-petits-ruminants virus and capripoxvirus infections. J Virol 2003; 77:1571-7. [PMID: 12502870 PMCID: PMC140790 DOI: 10.1128/jvi.77.2.1571-1577.2003] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A recombinant capripoxvirus vaccine containing a cDNA of the peste-des-petits-ruminants virus (PPRV) fusion protein gene was constructed. A quick and efficient method was used to select a highly purified recombinant virus clone. A trial showed that a dose of this recombinant as low as 0.1 PFU protected goats against challenge with a virulent PPRV strain.
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Affiliation(s)
- G Berhe
- Cirad, Programme Santé Animale, Campus International de Baillarguet, 34398 Montpellier Cedex 05, France
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21
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Diallo A, Minet C, Berhe G, Le Goff C, Black DN, Fleming M, Barrett T, Grillet C, Libeau G. Goat immune response to capripox vaccine expressing the hemagglutinin protein of peste des petits ruminants. Ann N Y Acad Sci 2002; 969:88-91. [PMID: 12381569 DOI: 10.1111/j.1749-6632.2002.tb04356.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Sheep-pox and capripox are contagious diseases of domestic small ruminants for which the causal agent is a poxvirus classified into the Capripoxvirus genus. Viruses of this group have a host range specific to sheep, goats, cattle, and possibly buffalo. Thus, they are clearly indicated as vectors for the development of recombinant vaccines for peste des petits ruminants (PPR). Here we report the immune response of goats inoculated with a recombinant capripox-PPR hemagglutinin.
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Affiliation(s)
- A Diallo
- Cirad, Programme Santé Animale, Campus International de Baillarguet, 34398 Montpellier Cedex 05, France
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Boulangé A, Serveau C, Brillard M, Minet C, Gauthier F, Diallo A, Lalmanach G, Authié E. Functional expression of the catalytic domains of two cysteine proteinases from Trypanosoma congolense. Int J Parasitol 2001; 31:1435-40. [PMID: 11595230 DOI: 10.1016/s0020-7519(01)00267-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The catalytic domains of two closely related cysteine proteinases (CP1 and CP2) from Trypanosoma congolense, referred to as C1 and C2, were expressed as proforms in Escherichia coli (C1) and in the baculovirus system (C1 and C2). While the bacterial expression system did not allow recovery of active C1, the baculovirus system led to secretion of inactive zymogens which could be processed at acidic pH into mature enzymes. Active C1 and C2 were purified from serum-free culture supernatants by anion-exchange chromatography and characterised. Their kinetic parameters and pH activity profiles confirmed the relatedness between C2 and native CP2 (congopain). These properties also underline major functional differences between C1 and C2, that appear to relate to discrete but essential sequence differences. It is likely that these two enzymes perform distinct roles in vivo, in the parasite and/or in the host-parasite relationships.
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Affiliation(s)
- A Boulangé
- Laboratoire de Recherches et de Coordination sur les Trypanosomoses, IRD-CIRAD, Campus international de Baillarguet, 34398, Montpellier Cedex 5, France
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