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- Publisher
- Springer Journals
- Copyright
- Copyright © 1997 by Macmillan Publishers Limited
- Subject
- Biomedicine; Biomedicine, general; Human Genetics; Cell Biology; Nanotechnology; Gene Therapy; Gene Expression
- eISSN
- 1476-5462
- DOI
- 10.1038/sj.gt.3300414
- Publisher site
- See Article on Publisher Site
Abstract
Replication-defective (E1+E3-deleted) human adenovirus vectors are a promising means of therapeutic gene delivery to skeletal muscle cells. Since the tropism of adenovirus is nonselective, muscle-specific expression of systemically administered vectors can only be achieved by the use of a tissue-specific promoter/enhancer that is small enough to fit the insert capacity of the vector. We have generated two replication-defective adenovirus recombinants (AV) in which the reporter gene (either firefly luciferase or E. coli β-galactosidase) was driven by a truncated (1.35 kb) muscle creatine kinase (MCK) promoter/enhancer or by the fast troponin I (TnI) promoter/enhancer. Highly efficient and muscle-specific transgene expression was demonstrated in immunodeficient mice after local injection of AV into muscles at an early age. In nonmuscle tissues (brain, liver, kidney, lung), the transgene expression was extremely low even though in these tissues in situ polymerase chain reaction showed as high an infectivity of the cells by the AV as in muscle. The relatively small size, the good efficiency and the muscle specificity of the MCK promoter would make it ideal to drive the 6.3 kb (truncated) dystrophin cDNA in first generation AV (with a limited (8 kb) insert capacity) designed for gene therapy of Duchenne muscular dystrophy.
Journal
Gene Therapy – Springer Journals
Published: Dec 18, 1997