Expression of green fluorescent protein in the chicken using in vivo transfection of the piggyBac transposon

• Published in: Journal of biotechnology Vol. 173; pp. 86 - 89
• Main Authors: Jordan, Brian J., Vogel, Seth, Stark, Michael R., Beckstead, Robert B.
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 10.03.2014
• Subjects: Animals; Animals, Genetically Modified; Biocompatibility; Biomedical materials; Chick Embryo; Chickens; Chickens - genetics; Chicks; Chimera; DNA Transposable Elements - genetics; Genome; Germ Cells - metabolism; Green Fluorescent Proteins - metabolism; In vivo testing; In vivo tests; Proteins; Surgical implants; Transfection; Transfection - methods; Transgenic; Transposable element; Transposon; Transgenic; Transfection; Transposable element; Transposon; Chimera
• ISSN: 0168-1656; 1873-4863
• DOI: 10.1016/j.jbiotec.2014.01.016

•We utilized the piggyBac system paired with an in vivo transfection reagent in the developing chick.•Stable expression of the EGFP transgene was seen in multiple tissue including germ cells.•This methodology could be used for production of germ line transgenics. The chicken is a well-established model system for studying developmental biology and is recognized as one of the top food production animals in the world. For this reason the chicken is an excellent candidate for transgenic applications, as the technology can be applied to both areas of research. Transgenic technology has not been broadly utilized in the chicken model, however, primarily due to difficulties in targeting germ cells and establishing germ line transmission. Transgenic technologies using non-replicating viral particles have been used in the chick, but are unsuitable for many applications because of size and sequence restraints and low efficiency. To create a more versatile method to target chick germ line stem cells, we utilized the transposable element system piggyBac paired with an in vivo transfection reagent, JetPEI. piggyBac has been previously shown to be highly active in mammalian cells and will transpose into the chicken genome. Here, we show that JetPEI can transfect multiple chick cell types, most notably germline stem cells. We also show that pairing these two reagents is a viable and reproducible method for long-term expression of a transgene in the chicken. Stable expression of the green fluorescent protein (GFP) transgene was seen in multiple tissue types including heart, brain, liver, intestine, kidney and gonad. Combining an in vivo transfection strategy with the PB system provides a simple and flexible method for efficiently producing stable chimeric birds and could be used for production of germ line transgenics.