Investigating Tick-borne Flaviviral-like Particles as a Delivery System for Gene Therapy
Autor: | Kjell Hultenby, Ryan M. Schuchman, Anne Neddermeyer, Maruthibabu Paidikondala, Mehdi R. M. Bidokhti |
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Rok vydání: | 2018 |
Předmět: |
0301 basic medicine
tick-borne encephalitis virus viruses Genetic enhancement Medical Biotechnology 030106 microbiology delivery system Gene delivery Biology 03 medical and health sciences Plasmid flavivirus CMV promoter Medicinsk bioteknologi Gene expression Pharmacology (medical) Replicon Gene Original Research Pharmacology electron microscopy CAG promoter Structural gene Transfection gene therapy Virology 030104 developmental biology viral-like particles |
Zdroj: | Current Therapeutic Research Current Therapeutic Research, Clinical and Experimental |
ISSN: | 0011-393X |
DOI: | 10.1016/j.curtheres.2017.10.003 |
Popis: | Background Research on the biogenesis of tick-borne encephalitis virus (TBEV) would benefit gene therapy. Due to specific arrangements of genes along the TBEV genome, its viral-like particles (VLPs) could be exploited as shuttles to deliver their replicon, which carries therapeutic genes, to immune system cells. Objective To develop a flaviviral vector for gene delivery as a part of gene therapy research that can be expressed in secretable VLP suicidal shuttles and provide abundant unique molecular and structural data supporting this gene therapy concept. Method TBEV structural gene constructs of a Swedish Toro strain were cloned into plasmids driven by the promoters CAG and CMV and then transfected into various cell lines, including COS-1 and BHK-21. Time-course sampling of the cells, culture fluid, cell lysate supernatant, and pellet specimens were performed. Western blotting and electron microscopy analyses of collected specimens were used to investigate molecular and structural processing of TBEV structural proteins. Results Western blotting analysis showed differences between promoters in directing the gene expression of the VLPs constructs. The premature flaviviral polypeptides as well as mature VLPs could be traced. Using electron microscopy, the premature and mature VLP accumulation in cellular compartments—and also endoplasmic reticulum proliferation as a virus factory platform—were observed in addition to secreted VLPs. Conclusions The abundant virologic and cellular findings in this study show the natural processing and safety of inserting flaviviral structural genes into suicidal VLP shuttles. Thus, we propose that these VLPs are a suitable gene delivering system model in gene therapy. |
Databáze: | OpenAIRE |
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