Journal
JOURNAL OF GENERAL VIROLOGY
Volume 96, Issue -, Pages 40-45Publisher
SOC GENERAL MICROBIOLOGY
DOI: 10.1099/vir.0.068437-0
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Funding
- China Scholarship Council
- USDA, ARS CRIS [6612-32000-067-00D]
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Newcastle disease virus (NDV) has been developed as a vector for vaccine and gene therapy purposes. However, the optimal insertion site for foreign gene expression remained to be determined. In the present study, we inserted the green fluorescence protein (GFP) gene into five different intergenic regions of the enterotropic NDV VG/GA vaccine strain using reverse genetics technology. The rescued recombinant viruses retained lentogenic pathotype and displayed delayed growth dynamics, particularly when the GFP gene was inserted between the NP and P genes of the virus. The GFP mRNA level was most abundant when the gene was inserted closer to the 3' end and gradually decreased as the gene was inserted closer to the 5' end. Measurement of the GFP fluorescence intensity in recombinant virus-infected cells demonstrated that the non-coding region between the P and M genes is the optimal insertion site for foreign gene expression in the VG/GA vaccine vector.
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