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Gene transfer into rabbit arteries with adeno-associated virus and adenovirus vectors

✍ Scribed by Marcin Gruchała; Shalini Bhardwaj; Katri Pajusola; Himadri Roy; Tuomas T. Rissanen; Ilze Kokina; Ivana Kholová; Johanna E. Markkanen; Juha Rutanen; Tommi Heikura; Kari Alitalo; Hansruedi Büeler; Seppo Ylä-Herttuala

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
352 KB
Volume
6
Category
Article
ISSN
1099-498X

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✦ Synopsis

Abstract

Background

Gene transfer offers considerable potential for altering vessel wall physiology and intervention in vascular disease. Therefore, there is great interest in developing optimal strategies and vectors for efficient, targeted gene delivery into a vessel wall.

Methods

We studied adeno‐associated viruses (AAV; 9 × 10^8^ to 4 × 10^9^ TU/ml) for their usefulness to transduce rabbit arteries in vivo in comparison with adenoviruses (Adv; 1 × 10^9^ to 1 × 10^10^ pfu/ml). 100 µl of viruses or placebo solution were injected intraluminally into transiently isolated carotid segments.

Results

In normal arteries AAV transduced mainly medial smooth muscle cells (SMC) while Adv transduced exclusively endothelial cells (EC). Mechanical injury to EC layer and internal elastic lamina enabled Adv to penetrate and transduce medial SMC. Transgene expression in EC after the AAV‐mediated gene transfer was very low. The use of the EC‐specific Tie‐1 promoter did not lead to specific transgene expression in EC. Transgene expression in SMC persisted for at least 100 days after the AAV treatment whereas the Adv‐mediated effect diminished in 14 days. AAV caused only a modest increase in EC VCAM‐1 expression and proliferation rate of vascular cells as compared with the mock‐treated arteries while Adv caused an extensive inflammatory cell infiltration, VCAM‐1 expression, vascular cell proliferation and morphological damages.

Conclusions

Significant differences were observed between the AAV and the Adv vectors in their patterns of arterial transduction and consequent inflammatory responses. These distinct properties may be utilized for different applications in vascular biology research and gene therapy for cardiovascular diseases. Copyright © 2004 John Wiley & Sons, Ltd.

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