Abstract:
:Duchenne muscular dystrophy (DMD) and other inherited myopathies lead to progressive destruction of most skeletal muscles in the body, including those responsible for maintaining respiration. DMD is a fatal disorder caused by defects in the dystrophin gene. Recombinant adenovirus vectors (AdV) are considered a promising means for therapeutic delivery of a functional dystrophin gene to DMD muscles. If AdV-mediated dystrophin gene replacement in DMD is to be successful, development of a systemic delivery method for targeting the large number of diseased muscles will be required. In this study we investigated two major factors preventing efficient AdV-mediated gene transfer to skeletal muscles of adult animals after intravascular AdV administration: (1) an inability of AdV particles to breach the endothelial barrier and enter into contact with myofibers, and (2) a relatively nonpermissive myofiber population for AdV infection due at least in part to insufficient levels of the coxsackie/adenovirus attachment receptor (CAR). On the basis of established principles governing the transendothelial flux of macromolecules, we further hypothesized that an alteration in Starling forces (increased hydrostatic and decreased osmotic pressures) within the intravascular compartment would facilitate AdV transendothelial flux via convective transport. In addition, experimental muscle regeneration was employed to increase the prevalence of immature myofibers in which CAR expression is upregulated. Here we report that by employing the above-described strategy, high-level heterologous reporter gene expression was achievable in hindlimb muscles of normal rats as well as dystrophic (mdx) mice (genetic homolog of DMD) after a single intraarterial injection of AdV. Microsphere studies confirmed enhanced transport into muscle of fluorescent tracer particles in the size range of AdV, and there was a high concordance between CAR upregulation and myofiber transduction after intraarterial AdV delivery. Furthermore, in mdx mice examined 10 days after intraarterial AdV delivery, the aforementioned procedures had no adverse effects on the force-generating capacity of targeted muscles. These findings have implications for eventual AdV-mediated gene therapy of generalized skeletal muscle diseases such as DMD using a systemic intraarterial delivery approach.
journal_name
Hum Gene Therjournal_title
Human gene therapyauthors
Cho WK,Ebihara S,Nalbantoglu J,Gilbert R,Massie B,Holland P,Karpati G,Petrof BJdoi
10.1089/10430340050015608keywords:
subject
Has Abstractpub_date
2000-03-20 00:00:00pages
701-14issue
5eissn
1043-0342issn
1557-7422journal_volume
11pub_type
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pub_type: 杂志文章
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更新日期:1993-12-01 00:00:00
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更新日期:1999-09-20 00:00:00
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更新日期:2007-12-01 00:00:00
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journal_title:Human gene therapy
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doi:10.1089/10430340050057503
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doi:10.1089/hum.2008.129
更新日期:2009-01-01 00:00:00
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journal_title:Human gene therapy
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更新日期:1997-03-01 00:00:00
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journal_title:Human gene therapy
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doi:10.1089/hum.1996.7.13-1491
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