Quantification of VP22-GFP spread by direct fluorescence in 15 commonly used cell lines
✍ Scribed by W. A. Wybranietz; F. Prinz; M. Spiegel; A. Schenk; M. Bitzer; M. Gregor; U. M. Lauer
- Book ID
- 101300225
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 252 KB
- Volume
- 1
- Category
- Article
- ISSN
- 1099-498X
No coin nor oath required. For personal study only.
✦ Synopsis
Background The intercellular transport property of VP22 chimeric proteins offers the opportunity for the improvement of gene therapy delivery systems. Since enhanced therapeutic effects of transduced genes already have been exempli®ed for chimeric proteins VP22-p53 and VP22-tk, we were interested in examining whether spread of VP22 chimeric proteins is a general biological phenomenon not restricted to distinct tissues or species.
Methods
To study intercellular spread of VP22-GFP fusion proteins, 15 different mammalian cell lines were transfected with 200±2000 ng of VP22-GFP or GFP expression plasmids. Expression of VP22-GFP or GFP was monitored by ¯uorescence microscopy of live GFP ¯uorescence and direct FACS analysis. For selected cell lines, antibody detection of VP22-GFP spread was analysed by confocal microscopy as a control.
Results Spread of VP22-GFP fusion proteins was detected in all 15 cell lines tested, and quanti®ed by FACS analysis. Experimental conditions were found to be critical in the investigation of VP22-mediated intercellular spread.
Conclusion
Results of our study indicate that spread of VP22 chimeric proteins is a general biological phenomenon not restricted to distinct tissues or species. Therefore, further evidence is provided that VP22-enhanced gene therapeutic effects may be obtained irrespective of the target organ/tissue to be addressed.