Lifetime Correction of Genetic Deficiency in Mice with a Single Injection of Helper-Dependent Adenoviral Vector

• Published in: Proceedings of the National Academy of Sciences - PNAS Vol. 98; no. 23; pp. 13282 - 13287
• Main Authors: Kim, In-Hoo, Józkowicz, Alicja, Piedra, Pedro A., Oka, Kazuhiro, Chan, Lawrence
• Format: Journal Article
• Language: English
• Published: United States National Academy of Sciences 06-11-2001; National Acad Sciences; The National Academy of Sciences
• Subjects: Adenoviridae - genetics; Adenoviridae - immunology; Animals; Antibodies; Aorta; Apolipoproteins E - blood; Apolipoproteins E - genetics; Base Sequence; Biological Sciences; Blotting, Western; Cholesterols; Disease; DNA; DNA Primers; Enzyme-Linked Immunosorbent Assay; Female; Gene therapy; Genetic Therapy; Genetic Vectors; Genetics; Hypercholesterolemia; Hypercholesterolemia - genetics; Hypercholesterolemia - therapy; Immunohistochemistry; Life Expectancy; Lipoproteins; Liver; Mice; Mice, Inbred C57BL; Mice, Knockout; Neutralization Tests; Rodents; Transgenes
• ISSN: 0027-8424; 1091-6490
• DOI: 10.1073/pnas.241506298

Ideally, somatic gene therapy should result in lifetime reversal of genetic deficiencies. However, to date, phenotypic correction of monogenic hyperlipidemia in mouse models by in vivo gene therapy has been short-lived and associated with substantial toxicity. We have developed a helper-dependent adenoviral vector (HD-Ad) containing the apolipoprotein (apo) E gene. A single i.v. injection of this vector completely and stably corrected the hypercholesterolemia in apoE-deficient mice, an effect that lasted the natural lifespan of the mice. At 2.5 years, control aorta was covered 100% by atherosclerotic lesion, whereas aorta of treated mice was essentially lesion-free. There was negligible toxicity associated with the treatment. We also developed a method for repeated HD-Ad vector administration that could be applied to organisms, e.g., humans, with life spans longer than 2-3 years. These studies indicate that HD-Ad is a promising system for liver-directed gene therapy of metabolic diseases.