1
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Cerda A, Rivera M, Armijo G, Ibarra-Henriquez C, Reyes J, Blázquez-Sánchez P, Avilés J, Arce A, Seguel A, Brown AJ, Vásquez Y, Cortez-San Martín M, Cubillos FA, García P, Ferres M, Ramírez-Sarmiento CA, Federici F, Gutiérrez RA. An Open One-Step RT-qPCR for SARS-CoV-2 detection. PLoS One 2024; 19:e0297081. [PMID: 38271448 PMCID: PMC10810446 DOI: 10.1371/journal.pone.0297081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 12/26/2023] [Indexed: 01/27/2024] Open
Abstract
The COVID-19 pandemic has resulted in millions of deaths globally, and while several diagnostic systems were proposed, real-time reverse transcription polymerase chain reaction (RT-PCR) remains the gold standard. However, diagnostic reagents, including enzymes used in RT-PCR, are subject to centralized production models and intellectual property restrictions, which present a challenge for less developed countries. With the aim of generating a standardized One-Step open RT-qPCR protocol to detect SARS-CoV-2 RNA in clinical samples, we purified and tested recombinant enzymes and a non-proprietary buffer. The protocol utilized M-MLV RT and Taq DNA pol enzymes to perform a Taqman probe-based assay. Synthetic RNA samples were used to validate the One-Step RT-qPCR components, demonstrating sensitivity comparable to a commercial kit routinely employed in clinical settings for patient diagnosis. Further evaluation on 40 clinical samples (20 positive and 20 negative) confirmed its comparable diagnostic accuracy. This study represents a proof of concept for an open approach to developing diagnostic kits for viral infections and diseases, which could provide a cost-effective and accessible solution for less developed countries.
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Affiliation(s)
- Ariel Cerda
- ANID—Millennium Science Initiative Program—Millennium Institute for Integrative Biology (iBio), Santiago, Chile
- FONDAP Center for Genome Regulation, Departamento de Genética Molecular y Microbiología, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Maira Rivera
- ANID—Millennium Science Initiative Program—Millennium Institute for Integrative Biology (iBio), Santiago, Chile
- Institute for Biological and Medical Engineering, Schools of Engineering, Medicine and Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Grace Armijo
- ANID—Millennium Science Initiative Program—Millennium Institute for Integrative Biology (iBio), Santiago, Chile
- FONDAP Center for Genome Regulation, Departamento de Genética Molecular y Microbiología, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Catalina Ibarra-Henriquez
- ANID—Millennium Science Initiative Program—Millennium Institute for Integrative Biology (iBio), Santiago, Chile
- FONDAP Center for Genome Regulation, Departamento de Genética Molecular y Microbiología, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Javiera Reyes
- ANID—Millennium Science Initiative Program—Millennium Institute for Integrative Biology (iBio), Santiago, Chile
- Institute for Biological and Medical Engineering, Schools of Engineering, Medicine and Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Paula Blázquez-Sánchez
- ANID—Millennium Science Initiative Program—Millennium Institute for Integrative Biology (iBio), Santiago, Chile
- Institute for Biological and Medical Engineering, Schools of Engineering, Medicine and Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Javiera Avilés
- ANID—Millennium Science Initiative Program—Millennium Institute for Integrative Biology (iBio), Santiago, Chile
| | - Aníbal Arce
- ANID—Millennium Science Initiative Program—Millennium Institute for Integrative Biology (iBio), Santiago, Chile
| | - Aldo Seguel
- ANID—Millennium Science Initiative Program—Millennium Institute for Integrative Biology (iBio), Santiago, Chile
| | - Alexander J. Brown
- Department of Biomedical Research, National Jewish Health, Denver, CO, United States of America
- Department of Immunology & Microbiology, University of Colorado Anschutz Medical Campus, Aurora, CO, United States of America
| | - Yesseny Vásquez
- Escuela de Ciencias Médicas, Facultad de Medicina, Universidad de Santiago de Chile, USACH, Santiago, Chile
| | - Marcelo Cortez-San Martín
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago, Chile
| | - Francisco A. Cubillos
- ANID—Millennium Science Initiative Program—Millennium Institute for Integrative Biology (iBio), Santiago, Chile
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago, Chile
| | - Patricia García
- Departamento de Laboratorios Clínicos, Escuela de Medicina, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Marcela Ferres
- Departamento de Laboratorios Clínicos, Escuela de Medicina, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - César A. Ramírez-Sarmiento
- ANID—Millennium Science Initiative Program—Millennium Institute for Integrative Biology (iBio), Santiago, Chile
- Institute for Biological and Medical Engineering, Schools of Engineering, Medicine and Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Fernán Federici
- ANID—Millennium Science Initiative Program—Millennium Institute for Integrative Biology (iBio), Santiago, Chile
- FONDAP Center for Genome Regulation, Departamento de Genética Molecular y Microbiología, Pontificia Universidad Católica de Chile, Santiago, Chile
- Institute for Biological and Medical Engineering, Schools of Engineering, Medicine and Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Rodrigo A. Gutiérrez
- ANID—Millennium Science Initiative Program—Millennium Institute for Integrative Biology (iBio), Santiago, Chile
- FONDAP Center for Genome Regulation, Departamento de Genética Molecular y Microbiología, Pontificia Universidad Católica de Chile, Santiago, Chile
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2
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Toro-Ascuy D, Cárdenas M, Vásquez-Martínez Y, Cortez-San Martín M. Rescue of Infectious Salmon Anemia Virus (ISAV) from Cloned cDNA. Methods Mol Biol 2024; 2733:87-99. [PMID: 38064028 DOI: 10.1007/978-1-0716-3533-9_6] [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] [Indexed: 12/18/2023]
Abstract
The piscine orthomyxovirus called infectious salmon anemia virus (ISAV) is one of the most important emerging pathogens affecting the salmon industry worldwide. The first reverse genetics system for ISAV, which allows the generation of recombinant ISA virus (rISAV), is an important tool for the characterization and study of this virus. The plasmid-based reverse genetics system for ISAV includes the use of a novel fish promoter, the Atlantic salmon internal transcribed spacer region 1 (ITS-1). The salmon, viral, and mammalian genetic elements included in the pSS-URG vectors allow the expression of the eight viral RNA segments. In addition to four cytomegalovirus (CMV)-based vectors that express the four proteins of the ISAV ribonucleoprotein complex, the eight pSS-URG vectors allowed the generation of infectious rISAV in salmon cells.
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Affiliation(s)
- Daniela Toro-Ascuy
- Laboratory of Virology, Department of Biology, Faculty of Sciences, Universidad de Chile, Santiago, Chile
| | - Matías Cárdenas
- Department of Population Health College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - Yesseny Vásquez-Martínez
- Escuela de Medicina, Faculty of Health Sciences, University of Santiago de Chile, Santiago, Chile
| | - Marcelo Cortez-San Martín
- Laboratory of Molecular Virology and Pathogens Control, Faculty of Chemistry and Biology, University of Santiago de Chile, Santiago, Chile.
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3
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Cerda A, Rivera M, Armijo G, Ibarra-Henriquez C, Reyes J, Blázquez-Sánchez P, Avilés J, Arce A, Seguel A, Brown AJ, Vásquez Y, Cortez-San Martín M, Cubillos FA, García P, Ferres M, Ramírez-Sarmiento CA, Federici F, Gutiérrez RA. An Open One-Step RT-qPCR for SARS-CoV-2 detection. medRxiv 2023:2021.11.29.21267000. [PMID: 34909786 PMCID: PMC8669853 DOI: 10.1101/2021.11.29.21267000] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The COVID-19 pandemic has resulted in millions of deaths globally, and while several diagnostic systems were proposed, real-time reverse transcription polymerase chain reaction (RT-PCR) remains the gold standard. However, diagnostic reagents, including enzymes used in RT-PCR, are subject to centralized production models and intellectual property restrictions, which present a challenge for less developed countries. With the aim of generating a standardized One-Step open RT-qPCR protocol to detect SARS-CoV-2 RNA in clinical samples, we purified and tested recombinant enzymes and a non-proprietary buffer. The protocol utilized M-MLV RT and Taq DNA pol enzymes to perform a Taqman probe-based assay. Synthetic RNA samples were used to validate the One-Step RT-qPCR components, and the kit showed comparable sensitivity to approved commercial kits. The One-Step RT-qPCR was then tested on clinical samples and demonstrated similar performance to commercial kits in terms of positive and negative calls. This study represents a proof of concept for an open approach to developing diagnostic kits for viral infections and diseases, which could provide a cost-effective and accessible solution for less developed countries.
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Affiliation(s)
- Ariel Cerda
- ANID - Millennium Science Initiative Program - Millennium Institute for Integrative Biology (iBio)
- FONDAP Center for Genome Regulation. Departamento de Genética Molecular y Microbiología, Pontificia Universidad Católica de Chile, Santiago, 8331150, Chile
| | - Maira Rivera
- ANID - Millennium Science Initiative Program - Millennium Institute for Integrative Biology (iBio)
- Institute for Biological and Medical Engineering, Schools of Engineering, Medicine and Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Grace Armijo
- ANID - Millennium Science Initiative Program - Millennium Institute for Integrative Biology (iBio)
- FONDAP Center for Genome Regulation. Departamento de Genética Molecular y Microbiología, Pontificia Universidad Católica de Chile, Santiago, 8331150, Chile
| | - Catalina Ibarra-Henriquez
- ANID - Millennium Science Initiative Program - Millennium Institute for Integrative Biology (iBio)
- FONDAP Center for Genome Regulation. Departamento de Genética Molecular y Microbiología, Pontificia Universidad Católica de Chile, Santiago, 8331150, Chile
| | - Javiera Reyes
- ANID - Millennium Science Initiative Program - Millennium Institute for Integrative Biology (iBio)
- Institute for Biological and Medical Engineering, Schools of Engineering, Medicine and Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Paula Blázquez-Sánchez
- ANID - Millennium Science Initiative Program - Millennium Institute for Integrative Biology (iBio)
- Institute for Biological and Medical Engineering, Schools of Engineering, Medicine and Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Javiera Avilés
- ANID - Millennium Science Initiative Program - Millennium Institute for Integrative Biology (iBio)
| | - Aníbal Arce
- ANID - Millennium Science Initiative Program - Millennium Institute for Integrative Biology (iBio)
| | - Aldo Seguel
- ANID - Millennium Science Initiative Program - Millennium Institute for Integrative Biology (iBio)
| | - Alexander J. Brown
- Department of Biomedical Research, National Jewish Health, Denver, CO, USA
- Department of Immunology & Microbiology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Yesseny Vásquez
- Escuela de Ciencias Médicas. Facultad de Medicina. Universidad de Santiago de Chile. USACH, Santiago, Chile
| | - Marcelo Cortez-San Martín
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago, Chile
| | - Francisco A. Cubillos
- ANID - Millennium Science Initiative Program - Millennium Institute for Integrative Biology (iBio)
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago, Chile
| | - Patricia García
- Departamento de Laboratorios Clínicos. Escuela de Medicina. Facultad de Medicina. Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Marcela Ferres
- Departamento de Laboratorios Clínicos. Escuela de Medicina. Facultad de Medicina. Pontificia Universidad Católica de Chile, Santiago, Chile
| | - César A. Ramírez-Sarmiento
- ANID - Millennium Science Initiative Program - Millennium Institute for Integrative Biology (iBio)
- Institute for Biological and Medical Engineering, Schools of Engineering, Medicine and Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Fernán Federici
- ANID - Millennium Science Initiative Program - Millennium Institute for Integrative Biology (iBio)
- FONDAP Center for Genome Regulation. Departamento de Genética Molecular y Microbiología, Pontificia Universidad Católica de Chile, Santiago, 8331150, Chile
- Institute for Biological and Medical Engineering, Schools of Engineering, Medicine and Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Rodrigo A. Gutiérrez
- ANID - Millennium Science Initiative Program - Millennium Institute for Integrative Biology (iBio)
- FONDAP Center for Genome Regulation. Departamento de Genética Molecular y Microbiología, Pontificia Universidad Católica de Chile, Santiago, 8331150, Chile
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4
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Osorio M, Carvajal M, Vergara A, Butassi E, Zacchino S, Mascayano C, Montoya M, Mejías S, Martín MCS, Vásquez-Martínez Y. Prenylated Flavonoids with Potential Antimicrobial Activity: Synthesis, Biological Activity, and In Silico Study. Int J Mol Sci 2021; 22:ijms22115472. [PMID: 34067346 PMCID: PMC8196815 DOI: 10.3390/ijms22115472] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 05/17/2021] [Accepted: 05/18/2021] [Indexed: 12/11/2022] Open
Abstract
Prenylated flavonoids are an important class of naturally occurring flavonoids with important biological activity, but their low abundance in nature limits their application in medicines. Here, we showed the hemisynthesis and the determination of various biological activities of seven prenylated flavonoids, named 7–13, with an emphasis on antimicrobial ones. Compounds 9, 11, and 12 showed inhibitory activity against human pathogenic fungi. Compounds 11, 12 (flavanones) and 13 (isoflavone) were the most active against clinical isolated Staphylococcus aureus MRSA, showing that structural requirements as prenylation at position C-6 or C-8 and OH at positions C-5, 7, and 4′ are key to the antibacterial activity. The combination of 11 or 12 with commercial antibiotics synergistically enhanced the antibacterial activity of vancomycin, ciprofloxacin, and methicillin in a factor of 10 to 100 times against drug-resistant bacteria. Compound 11 combined with ciprofloxacin was able to decrease the levels of ROS generated by ciprofloxacin. According to docking results of S enantiomer of 11 with ATP-binding cassette transporter showed the most favorable binding energy; however, more studies are needed to support this result.
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Affiliation(s)
- Mauricio Osorio
- Laboratorio de Productos Naturales, Departamento de Química, Universidad Técnica Federico Santa María, Valparaíso 2390123, Chile
- Correspondence: (M.O.); (Y.V.-M.)
| | - Marcela Carvajal
- Centro de Biotecnología CB-DAL, Universidad Técnica Federico Santa María, Valparaíso 2390136, Chile; (M.C.); (A.V.)
| | - Alejandra Vergara
- Centro de Biotecnología CB-DAL, Universidad Técnica Federico Santa María, Valparaíso 2390136, Chile; (M.C.); (A.V.)
| | - Estefania Butassi
- Farmacognosia, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, Rosario 2000, Argentina; (E.B.); (S.Z.)
| | - Susana Zacchino
- Farmacognosia, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, Rosario 2000, Argentina; (E.B.); (S.Z.)
| | - Carolina Mascayano
- Departamento de Ciencias del Ambiente, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9170022, Chile;
| | - Margarita Montoya
- Laboratorio Bioquímica Celular, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9170022, Chile; (M.M.); (S.M.)
| | - Sophia Mejías
- Laboratorio Bioquímica Celular, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9170022, Chile; (M.M.); (S.M.)
| | - Marcelo Cortez-San Martín
- Laboratorio de Virología Molecular y Control de Patógenos, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9170022, Chile;
| | - Yesseny Vásquez-Martínez
- Programa Centro de Investigaciones Biomédicas Aplicadas, Escuela de Medicina, Facultad de Ciencias Médicas, Universidad de Santiago de Chile, Santiago 9170022, Chile
- Correspondence: (M.O.); (Y.V.-M.)
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5
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Muñoz-Osses M, Quiroz J, Vásquez-Martínez Y, Flores E, Navarrete E, Godoy F, Torrent C, Cortez-San Martín M, Gómez A, Mascayano C. Evaluation of cyrhetrenyl and ferrocenyl precursors as 5-lipoxygenase inhibitors – biological and computational studies. NEW J CHEM 2021. [DOI: 10.1039/d1nj01336j] [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: 11/21/2022]
Abstract
Synthesis and biological evaluation of precursors derived from ferrocene and cyrhetrene as inhibitors of enzyme 5-hLOX.
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Affiliation(s)
| | - Javiera Quiroz
- Departamento Ciencias del Ambiente
- Universidad de Santiago de Chile
- Chile
| | - Yesseny Vásquez-Martínez
- Programa Centro de Investigaciones Biomédicas y Aplicadas (CIBAP)
- Escuela de Medicina
- Facultad de Ciencias Médicas
- Universidad de Santiago de Chile
- Chile
| | - Erick Flores
- Departamento Química de los Materiales
- Universidad de Santiago de Chile
- Chile
| | | | - Fernando Godoy
- Departamento Química de los Materiales
- Universidad de Santiago de Chile
- Chile
| | - Claudia Torrent
- Departamento Ciencias del Ambiente
- Universidad de Santiago de Chile
- Chile
| | | | - Alejandra Gómez
- Departamento Química de los Materiales
- Universidad de Santiago de Chile
- Chile
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6
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Valdés E, González C, Díaz K, Vásquez-Martínez Y, Mascayano C, Torrent C, Cabezas F, Mejias S, Montoya M, Cortez-San Martín M, Muñoz MA, Joseph-Nathan P, Osorio M, Taborga L. Biological Properties and Absolute Configuration of Flavanones From Calceolaria thyrsiflora Graham. Front Pharmacol 2020; 11:1125. [PMID: 32848744 PMCID: PMC7399337 DOI: 10.3389/fphar.2020.01125] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 07/10/2020] [Indexed: 01/10/2023] Open
Abstract
Flavanones (-)-(2S)-5,4'-dihydroxy-7-methoxyflavanone (1) and (-)-(2S)-5,3',4'-trihydroxy-7-methoxyflavanone (2) were isolated from the extracts of Calceolaria thyrsiflora Graham, an endemic perennial small shrub growing in the central zone of Chile. The absolute configuration of these compounds was resolved by optical rotation experiments and in silico calculations. Three analogs (3, 4, and 5) were synthesized to do structure-activity relationships with the biological assays studied. Biological tests revealed that only flavanone 2 exhibited a moderate inhibitory activity against the methicillin-resistant strain S. aureus MRSA 97-77 (MIC value of 50 µg/ml). In addition, flavanone 2 showed a potent, selective, and competitive inhibition of 5-hLOX, which supports the traditional use of this plant as an anti-inflammatory in diseases of the respiratory tract. Also, 2 exhibited cytotoxic and selective effects against B16-F10 (8.07 ± 1.61 µM) but 4.6- and 17-fold lesser activity than etoposide and taxol.
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Affiliation(s)
- Ernesto Valdés
- Laboratorio de Productos Naturales, Departamento de Química, Universidad Técnica Federico Santa María, Valparaíso, Chile
| | - César González
- Laboratorio de Productos Naturales, Departamento de Química, Universidad Técnica Federico Santa María, Valparaíso, Chile
| | - Katy Díaz
- Laboratorio de Productos Naturales, Departamento de Química, Universidad Técnica Federico Santa María, Valparaíso, Chile
| | - Yesseny Vásquez-Martínez
- Programa Centro de Investigaciones Biomédicas Aplicadas, Facultad de Ciencias Médicas, Escuela de Medicina, Universidad de Santiago de Chile, Santiago, Chile.,Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Carolina Mascayano
- Departamento de Ciencias del Ambiente, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Claudia Torrent
- Departamento de Ciencias del Ambiente, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Francisco Cabezas
- Departamento de Ciencias del Ambiente, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Sophia Mejias
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Margarita Montoya
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Marcelo Cortez-San Martín
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Marcelo A Muñoz
- Facultad de Ciencias, Instituto de Ciencias Químicas, Universidad Austral de Chile, Valdivia, Chile
| | - Pedro Joseph-Nathan
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico City, Mexico
| | - Mauricio Osorio
- Laboratorio de Productos Naturales, Departamento de Química, Universidad Técnica Federico Santa María, Valparaíso, Chile
| | - Lautaro Taborga
- Laboratorio de Productos Naturales, Departamento de Química, Universidad Técnica Federico Santa María, Valparaíso, Chile
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7
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Toro-Ascuy D, Santibañez A, Peña V, Beltran-Pavez C, Cottet L, Molina C, Montoya M, Sandoval N, Vásquez-Martínez Y, Mascayano C, Cortez-San Martín M. Development of an Isavirus minigenome system to study the function of the pocket RNA-binding domain of the viral nucleoprotein (NP) in salmon cells. J Fish Dis 2020; 43:197-206. [PMID: 31845350 DOI: 10.1111/jfd.13122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 08/27/2019] [Revised: 10/09/2019] [Accepted: 10/11/2019] [Indexed: 06/10/2023]
Abstract
The Isavirus is an orthomyxovirus with a genome composed of eight segments of negative single-strand RNA (-ssRNA). It has been proposed that the eight genomic segments of the Isavirus are organized as a ribonucleoprotein (RNP) complex called a minigenome, which contains all the viral RNA segments, a viral heterotrimeric polymerase and multiple copies of the viral nucleoprotein (NP). Here, we develop an Isavirus minigenome system and show the importance of the formation of active RNPs and the role of viral NP R189, R194, R302 and K325 residues in the NP RNA-binding domain in the context of RNPs. The results indicate it is possible to generate a minigenome in salmon cells, a composite ISAV RNPs with EGFP-based chimeric vRNA with heterotrimeric polymerase (PB1, PB2, PA) and NP protein using CMV-based auxiliary plasmids. It was also shown that NP R189, R194, R302 and K325 residues are important to generate viral mRNA from the constituted RNPs and a detectable reporter protein. This work is the first salmon cell-based minigenome assay for the Isavirus, which was evaluated by a bioinformatic and functional study of the NP protein in viral RNPs, which showed that correct NP-vRNA interaction is key to the functioning of RNPs.
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Affiliation(s)
- Daniela Toro-Ascuy
- Facultad de Ciencias de la Salud, Instituto de Ciencias Biomedicas, Universidad Autónoma de Chile, Santiago, Chile
| | - Alvaro Santibañez
- Laboratory of Molecular Virology and Pathogen Control, Department of Biology, Faculty of Chemistry and Biology, University of Santiago, Santiago, Chile
| | - Victor Peña
- Laboratory of Molecular Virology and Pathogen Control, Department of Biology, Faculty of Chemistry and Biology, University of Santiago, Santiago, Chile
| | - Carolina Beltran-Pavez
- Laboratory of Molecular Virology and Pathogen Control, Department of Biology, Faculty of Chemistry and Biology, University of Santiago, Santiago, Chile
| | - Luis Cottet
- Laboratory of Molecular Virology and Pathogen Control, Department of Biology, Faculty of Chemistry and Biology, University of Santiago, Santiago, Chile
- Escuela de Biotecnología, Facultad de Ciencias, University Santo Tomas, Santiago, Chile
| | - Cristian Molina
- Laboratory of Molecular Virology and Pathogen Control, Department of Biology, Faculty of Chemistry and Biology, University of Santiago, Santiago, Chile
| | - Margarita Montoya
- Cellular Biochemistry Laboratory, Department of Biology, Faculty of Chemistry and Biology, University of Santiago, Santiago, Chile
| | - Nicolas Sandoval
- Laboratory of Molecular Virology and Pathogen Control, Department of Biology, Faculty of Chemistry and Biology, University of Santiago, Santiago, Chile
| | - Yesseny Vásquez-Martínez
- Programa Centro de Investigaciones Biomédicas Aplicadas, Facultad de Ciencias Médicas, Universidad de Santiago, Santiago, Chile
| | - Carolina Mascayano
- Department of Environmental Sciences, Faculty of Chemistry and Biology, University of Santiago, Santiago, Chile
| | - Marcelo Cortez-San Martín
- Laboratory of Molecular Virology and Pathogen Control, Department of Biology, Faculty of Chemistry and Biology, University of Santiago, Santiago, Chile
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8
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Kämpfer P, Glaeser SP, Irgang R, Fernández-Negrete G, Poblete-Morales M, Fuentes-Messina D, Cortez-San Martín M, Avendaño-Herrera R. Psychrobacter pygoscelis sp. nov. isolated from the penguin Pygoscelis papua. Int J Syst Evol Microbiol 2020; 70:211-219. [DOI: 10.1099/ijsem.0.003739] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Peter Kämpfer
- Institut für Angewandte Mikrobiologie, Justus-Liebig-Universität Giessen, D-35392 Giessen, Germany
| | - Stefanie P. Glaeser
- Institut für Angewandte Mikrobiologie, Justus-Liebig-Universität Giessen, D-35392 Giessen, Germany
| | - Rute Irgang
- Interdisciplinary Center for Aquaculture Research (INCAR), Viña del Mar, Chile
- Universidad Andrés Bello, Laboratorio de Patología de Organismos Acuáticos y Biotecnología Acuícola, Facultad de Ciencias de la Vida, Viña del Mar, Chile
| | | | - Matías Poblete-Morales
- Interdisciplinary Center for Aquaculture Research (INCAR), Viña del Mar, Chile
- Universidad Andrés Bello, Laboratorio de Patología de Organismos Acuáticos y Biotecnología Acuícola, Facultad de Ciencias de la Vida, Viña del Mar, Chile
| | - Derie Fuentes-Messina
- Fraunhofer Chile Research Foundation, Center for Systems Biotechnology, Santiago, Chile
| | - Marcelo Cortez-San Martín
- Laboratorio de Virología Molecular, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Ruben Avendaño-Herrera
- Universidad Andrés Bello, Laboratorio de Patología de Organismos Acuáticos y Biotecnología Acuícola, Facultad de Ciencias de la Vida, Viña del Mar, Chile
- Interdisciplinary Center for Aquaculture Research (INCAR), Viña del Mar, Chile
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9
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Vásquez-Martínez Y, Osorio M, San Martín D, Carvajal M, Vergara A, Sanchez E, Raimondi M, Zacchino S, Mascayano C, Torrent C, Cabezas F, Mejias S, Montoya M, Cortez-San Martín M. Antimicrobial, Anti-Inflammatory and Antioxidant Activities of Polyoxygenated Chalcones. J BRAZIL CHEM SOC 2018. [DOI: 10.21577/0103-5053.20180177] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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10
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Morales J, Barrera-Avalos C, Castro C, Castillo S, Barrientos C, Robles-Planells C, López X, Torres E, Montoya M, Cortez-San Martín M, Riquelme D, Escobar A, Fernández R, Imarai M, Sauma D, Rojo LE, Leiva-Salcedo E, Acuña-Castillo C. Dead Tumor Cells Expressing Infectious Salmon Anemia Virus Fusogenic Protein Favor Antigen Cross-Priming In Vitro. Front Immunol 2017; 8:1170. [PMID: 29062313 PMCID: PMC5640808 DOI: 10.3389/fimmu.2017.01170] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Accepted: 09/04/2017] [Indexed: 12/17/2022] Open
Abstract
Antigen cross-presentation is a crucial step in the assembly of an antitumor immune response leading to activation of naïve CD8 T cells. This process has been extensively used in clinical trials, in which dendritic cells generated in vitro are loaded with tumor antigens and then autotransplanted to the patients. Recently, the use of autologous transplant of dendritic cells fused with dying tumor cells has demonstrated good results in clinical studies. In this work, we generated a similar process in vivo by treating mice with dead tumor cells [cell bodies (CBs)] expressing the fusogenic protein of the infectious salmon anemia virus (ISAV). ISAV fusion protein retains its fusogenic capability when is expressed on mammalian cells in vitro and the CBs expressing it facilitates DCs maturation, antigen transfer by antigen-presenting cells, and increase cross-presentation by DCs in vitro. Additionally, we observed in the melanoma model that CBs with or without ISAV fusion protein reduce tumor growth in prophylactic treatment; however, only ISAV expressing CBs showed an increase CD4 and CD8 cells in spleen. Overall, our results suggest that CBs could be used as a complement with other type of strategies to amplify antitumor immune response.
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Affiliation(s)
- Jonathan Morales
- Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago, Chile
| | - Carlos Barrera-Avalos
- Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago, Chile
| | - Carlos Castro
- Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago, Chile
| | - Stephanie Castillo
- Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago, Chile
| | - Claudio Barrientos
- Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago, Chile
| | - Claudia Robles-Planells
- Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago, Chile
| | - Ximena López
- Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago, Chile
| | - Ernesto Torres
- Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago, Chile
| | - Margarita Montoya
- Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago, Chile
| | - Marcelo Cortez-San Martín
- Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago, Chile
| | - Denise Riquelme
- Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago, Chile
| | - Alejandro Escobar
- Instituto de Investigación en Ciencias Odontológicas, Facultad de Odontología, Universidad de Chile, Santiago, Chile
| | | | - Mónica Imarai
- Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago, Chile
| | - Daniela Sauma
- Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Santiago, Chile
| | - Leonel E Rojo
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago, Chile
| | - Elias Leiva-Salcedo
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago, Chile
| | - Claudio Acuña-Castillo
- Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago, Chile
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11
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Kämpfer P, Irgang R, Poblete-Morales M, Glaeser SP, Cortez-San Martín M, Avendaño-Herrera R. Psychromonas aquatilis sp. nov., isolated from seawater samples obtained in the Chilean Antarctica. Int J Syst Evol Microbiol 2017; 67:1306-1311. [DOI: 10.1099/ijsem.0.001801] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Peter Kämpfer
- Institut für Angewandte Mikrobiologie, Justus-Liebig-Universität Giessen, D-35392 Giessen, Germany
| | - Rute Irgang
- Laboratorio de Patología de Organismos Acuáticos y Biotecnología Acuícola, Facultad de Ciencias Biológicas, Universidad Andrés Bello, Viña del Mar, Chile
- Interdisciplinary Center for Aquaculture Research (INCAR), Concepción, Chile
| | - Matías Poblete-Morales
- Laboratorio de Patología de Organismos Acuáticos y Biotecnología Acuícola, Facultad de Ciencias Biológicas, Universidad Andrés Bello, Viña del Mar, Chile
- Interdisciplinary Center for Aquaculture Research (INCAR), Concepción, Chile
| | - Stefanie P Glaeser
- Institut für Angewandte Mikrobiologie, Justus-Liebig-Universität Giessen, D-35392 Giessen, Germany
| | - Marcelo Cortez-San Martín
- Laboratorio de Virología Molecular, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Ruben Avendaño-Herrera
- Laboratorio de Patología de Organismos Acuáticos y Biotecnología Acuícola, Facultad de Ciencias Biológicas, Universidad Andrés Bello, Viña del Mar, Chile
- Interdisciplinary Center for Aquaculture Research (INCAR), Concepción, Chile
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Abstract
The piscine Orthomyxovirus called Infectious Salmon Anemia Virus (ISAV) is one of the most important emerging pathogens affecting the salmon industry worldwide. The first reverse genetics system for ISAV, which allows the generation of recombinant ISA virus (rISAV), is an important tool for the characterization and study of this fish virus. The plasmid-based reverse genetics system for ISAV includes the use of a novel fish promoter, the Atlantic salmon internal transcribed spacer region 1 (ITS-1). The salmon, viral and mammalian genetic elements included in pSS-URG vectors allow the expression of the eight viral RNA segments. In addition to four cytomegalovirus (CMV)-based vectors that express the four proteins of the ISAV ribonucleoprotein complex, the eight pSS-URG vectors allowed the generation of infectious rISAV in salmon cells.
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Affiliation(s)
- Daniela Toro-Ascuy
- Laboratory of Molecular Virology, Faculty of Chemistry and Biology, University of Santiago of Chile, Santiago, Chile
| | - Marcelo Cortez-San Martín
- Laboratory of Molecular Virology, Faculty of Chemistry and Biology, University of Santiago of Chile, Santiago, Chile.
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13
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Castro-Nallar E, Cortez-San Martín M, Mascayano C, Molina C, Crandall KA. Molecular phylodynamics and protein modeling of infectious salmon anemia virus (ISAV). BMC Evol Biol 2011; 11:349. [PMID: 22132866 PMCID: PMC3267707 DOI: 10.1186/1471-2148-11-349] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Accepted: 12/02/2011] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND ISAV is a member of the Orthomyxoviridae family that affects salmonids with disastrous results. It was first detected in 1984 in Norway and from then on it has been reported in Canada, United States, Scotland and the Faroe Islands. Recently, an outbreak was recorded in Chile with negative consequences for the local fishing industry. However, few studies have examined available data to test hypotheses associated with the phylogeographic partitioning of the infecting viral population, the population dynamics, or the evolutionary rates and demographic history of ISAV. To explore these issues, we collected relevant sequences of genes coding for both surface proteins from Chile, Canada, and Norway. We addressed questions regarding their phylogenetic relationships, evolutionary rates, and demographic history using modern phylogenetic methods. RESULTS A recombination breakpoint was consistently detected in the Hemagglutinin-Esterase (he) gene at either side of the Highly Polymorphic Region (HPR), whereas no recombination breakpoints were detected in Fusion protein (f) gene. Evolutionary relationships of ISAV revealed the 2007 Chilean outbreak group as a monophyletic clade for f that has a sister relationship to the Norwegian isolates. Their tMRCA is consistent with epidemiological data and demographic history was successfully recovered showing a profound bottleneck with further population expansion. Finally, selection analyses detected ongoing diversifying selection in f and he codons associated with protease processing and the HPR region, respectively. CONCLUSIONS Our results are consistent with the Norwegian origin hypothesis for the Chilean outbreak clade. In particular, ISAV HPR0 genotype is not the ancestor of all ISAV strains, although SK779/06 (HPR0) shares a common ancestor with the Chilean outbreak clade. Our analyses suggest that ISAV shows hallmarks typical of RNA viruses that can be exploited in epidemiological and surveillance settings. In addition, we hypothesized that genetic diversity of the HPR region is governed by recombination, probably due to template switching and that novel fusion gene proteolytic sites confer a selective advantage for the isolates that carry them. Additionally, protein modeling allowed us to relate the results of phylogenetic studies with the predicted structures. This study demonstrates that phylogenetic methods are important tools to predict future outbreaks of ISAV and other salmon pathogens.
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Affiliation(s)
- Eduardo Castro-Nallar
- Department of Biology, 401 Widtsoe Building, Brigham Young University, Provo, UT 84602-5181, USA.
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14
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Cortez-San Martín M, Villanueva RA, Jashés M, Sandino AM. Molecular characterization of IPNV RNA replication intermediates during the viral infective cycle. Virus Res 2009; 144:344-9. [PMID: 19467274 DOI: 10.1016/j.virusres.2009.05.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2009] [Revised: 05/16/2009] [Accepted: 05/17/2009] [Indexed: 10/20/2022]
Abstract
Infectious Pancreatic Necrosis Virus (IPNV) is a bisegmented, double-stranded RNA virus, which belongs to the Birnaviridae family. In the current study, we have analyzed the RNA replication intermediates (RI) purified throughout the viral replication cycle in cultured cells. Equilibrium ultracentrifugation of infected cellular lysates resulted in two major peaks of viral components. The first peak, at a buoyant density of 1.33 g/cm(3), contained assembled IPNV viral particles A and B, whereas the second peak, located at buoyant densities >1.4 g/cm(3), contained a higher molecular weight viral ribonucleoprotein complex composed of, at least, VPg/VP1 and a heterogeneous population of single- and double-stranded viral RNA species. Interestingly, analyses of these dsRNA RI indicated that they contain single-stranded segments of incompletely synthesized positive-strands of RNA. Northern blot experiments of total RNA isolated from infected cells confirmed our proposed configuration of the RNA RI, where the full-length negative-strand of RNA is used as the template for the synthesis of several 3'-truncated forms of the positive-strand of the viral RNA. Together, our results indicate that IPNV utilizes the negative-strand of RNA as template for genome replication.
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Affiliation(s)
- Marcelo Cortez-San Martín
- Laboratorio de Virología, Departamento de Cs. Biológicas, Facultad de Química y Biología, Universidad de Santiago de Chile, P.O. Box 40, Santiago 33, Chile
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15
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Tourís-Otero F, Cortez-San Martín M, Martínez-Costas J, Benavente J. Avian reovirus morphogenesis occurs within viral factories and begins with the selective recruitment of sigmaNS and lambdaA to microNS inclusions. J Mol Biol 2004; 341:361-74. [PMID: 15276829 DOI: 10.1016/j.jmb.2004.06.026] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2004] [Revised: 06/11/2004] [Accepted: 06/11/2004] [Indexed: 11/21/2022]
Abstract
We have recently shown that the avian reovirus non-structural protein microNS forms cytoplasmic inclusions in transfected cells and recruits sigmaNS to these structures. In the present study we further demonstrate that microNS mediates the association of the major core protein lambdaA, but not of sigmaA or sigmaC, with inclusions, indicating that the recruitment of viral proteins into avian reovirus factories has specificity. Thus, some proteins appear to be initially recruited to factories by association with microNS, whereas others are recruited subsequently through interaction with as-yet-unknown factors. We next used metabolic pulse-chase radiolabeling combined with cell fractionation and antibody immunoprecipitation to study the recruitment of newly synthesized viral polypeptides into viral factories and virus particles. The results of this combined approach revealed that avian reovirus morphogenesis is a complex and temporally controlled process that takes place exclusively within globular viral factories that are not microtubule-associated. Our findings further suggest that cores are assembled within the first 30 minutes after the synthesis of their polypeptide components, and that reovirion morphogenesis is completed over the next 30 minutes by the subsequent addition of outer capsid proteins.
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Affiliation(s)
- Fernando Tourís-Otero
- Departamento de Bioquímica y Biología Molecular, Facultad de Farmacia, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain
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