A novel binary adenovirus-based dual-regulated expression system for independent transcription control of two different transgenes

被引:12
作者
Gonzalez-Nicolini, V [1 ]
Fussenegger, M [1 ]
机构
[1] ETH Honggerberg, Swiss Fed Inst Technol, Inst Chem & Bioengn, CH-8093 Zurich, Switzerland
关键词
adenovirus; CFP; p27(KIP1); PIP system; pristinamycin; SAMY; SEAP; streptogramin; tetracycline; TET system;
D O I
10.1002/jgm.787
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Background Stringent multitransgene control is a prerequisite for future gene-therapy and tissue-engineering scenarios and requires constant improvements in design to achieve optimal conditional transcription profiles. Methods We have pioneered a variety of recombinant adenoviruses which (i) enable streptogramin-responsive transgene transduction in a compact autoregulated one-virus format, (ii) manage independent streptogramin- and tetracycline-responsive control of two different transgenes from a single divergent expression unit, and (iii) control sense and antisense expression of the human cyclin-dependent kinase inhibitor p27(Kip1) to engineer conditional positive (enforced S-phase entry, p27(Kip1)-antisense expression) or negative (G1-phase-specific growth arrest, p27(Kip1)-sense expression) growth control in mammalian cell lines and human primary cells. Results The transgene control performance of all adenoviral expression configurations has been rigorously optimized for tight, balanced and maximum expression levels and was validated for intracellular as well as for secreted product in a variety of biotechnologically relevant cell lines (Chinese hamster ovary cells [CHO-K1], baby hamster kidney cells [BHK21]) as well as in human cell lines (human fibrosarcoma cells [HT-1080]) and primary cells (human aortic fibroblasts [HAFs]). Conclusions We believe that multiregulated multigene-controlled adenoviruses are important assets for successful therapeutic reprogramming of mammalian cells in clinically relevant scenarios. Copyright (c) 2005 John Wiley & Sons, Ltd.
引用
收藏
页码:1573 / 1585
页数:13
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