A cDNA fragment containing the gene encoding the glycoprotein of infectious hematopoietic necrosis virus was inserted into Autographa californica baculovirus vectors under the control of the polyhedrin promoter. A 66-kilodalton protein, identical in size to the glycosylated glycoprotein of infectious hematopoietic necrosis virus, was expressed at high levels in Spodoptera frugiperda cells infected with the recombinant viruses. The expressed protein reacted with antiserum to the glycoprotein on Western blots (immunoblots).
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http://dx.doi.org/10.1128/JVI.64.1.428-430.1990 | DOI Listing |
J Pestic Sci
November 2024
Bacillus Tech LLC.
The Cry1Fa insecticidal protein from (Bt) was expressed on the surface of (Bs) spores to create transgenic Bs spores referred to as Spore-Cry1Fa. Cry1Fa, along with its leader sequence, was connected to the carboxyl end of a Bs spore outercoat protein, CotC, through a flexible linker. The Arg-27 residue of the Cry1Fa protein was mutated to Leu to prevent detachment from the spores due to protease digestion.
View Article and Find Full Text PDFCurr Issues Mol Biol
January 2025
Department of Biopharmacy, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou 310018, China.
(Mhp) infection severely affects the daily weight gain and feed-to-meat ratio of pigs, while secondary infections with other pathogens can further lead to increased mortality, causing significant economic losses to the pig industry. CD40L is a molecular adjuvant that enhances the cellular and humoral immune responses to vaccines. In this study, the CD40L peptide was fused to the C-terminus of the chimeric P97R1P46P42 protein by genetic engineering using the pFastBac Dual vector.
View Article and Find Full Text PDFCurr Pharm Biotechnol
January 2025
College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310000, China.
Background: Gene therapy has been effectively applied in many biological studies and for the treatment of many genetic or cancer diseases. Currently, Recombinant Adeno- Associated Viruses (rAAVs) are one of the main types of delivery vectors used for gene therapy. rAAV vectors produced via the Sf9 cells have the advantages of high rAAV yields, easy scaleup, and low cost.
View Article and Find Full Text PDFBiotechnol Prog
January 2025
Bioprocess Engineering, Wageningen University & Research, Wageningen, The Netherlands.
The emergence of new viruses and the spread of existing pathogens necessitate efficient vaccine production methods. The baculovirus expression vector system (BEVS) is an efficient and scalable system for subunit and virus-like particle vaccine production and gene therapy vectors. However, current production processes are often limited to low cell concentrations (1-4 × 10 cells/mL) in fed-batch mode.
View Article and Find Full Text PDFBiotechnol Bioeng
January 2025
Instituto de Biologia Experimental e Tecnológica (iBET), Oeiras, Portugal.
The insect cell-baculovirus expression vector system (IC-BEVS) has been an asset to produce biologics for over 30 years. With the current trend in biotechnology shifting toward process intensification and integration, developing intensified processes such as continuous production is crucial to hold this platform as a suitable alternative to others. However, the implementation of continuous production has been hindered by the lytic nature of this expression system and the process-detrimental virus passage effect.
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