1. Establishment and characterization of plasmid-driven minigenome rescue systems for Nipah virus: RNA polymerase I- and T7-catalyzed generation of functional paramyxoviral RNA.
- Author
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Freiberg A, Dolores LK, Enterlein S, and Flick R
- Subjects
- Antiviral Agents pharmacology, Cell Line, Chloramphenicol O-Acetyltransferase metabolism, DNA-Directed RNA Polymerases genetics, HeLa Cells, Humans, Microbial Sensitivity Tests methods, Nipah Virus drug effects, Nipah Virus genetics, Paramyxoviridae genetics, Paramyxoviridae metabolism, RNA Polymerase I genetics, RNA, Viral drug effects, RNA, Viral genetics, Transcription, Genetic drug effects, Transfection, Viral Proteins genetics, Virus Replication drug effects, DNA-Directed RNA Polymerases metabolism, Genome, Viral genetics, Nipah Virus physiology, Plasmids genetics, RNA Polymerase I metabolism, RNA, Viral metabolism, Viral Proteins metabolism
- Abstract
In this study we report the development and optimization of two minigenome rescue systems for Nipah virus, a member of the Paramyxoviridae family. One is mediated by the T7 RNA polymerase supplied either by a constitutively expressing cell line or by transfection of expression plasmids and is thus independent from infection with a helper virus. The other approach is based on RNA polymerase I-driven transcription, a unique approach for paramyxovirus reverse genetics technology. Minigenome rescue was evaluated by reporter gene activities of (i) the two different minigenome transcription systems, (ii) genomic versus antigenomic-oriented minigenomes, (iii) different ratios of the viral protein expression plasmids, and (iv) time course experiments. The high efficiency and reliability of the established systems allowed for downscaling to 96-well plates. This served as a basis for the development of a high-throughput screening system for potential antivirals that target replication and transcription of Nipah virus without the need of high bio-containment. Using this system we were able to identify two compounds that reduced minigenome activity.
- Published
- 2008
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