The feasibility of using DNA as a treatment has been demonstratedin animal models, but clinical applications of this form oftechnology remain elusive. When gene therapy does come intowide medical use, it may be as a vaccine. Difficulties in developingvaccines against chronic infections with viral agents such asthe human immunodeficiency virus (HIV), herpes simplex virus,and hepatitis C virus are partly due to the poor immunogenicityof standard vaccines; these problems have spurred the developmentof new vaccine strategies that use DNA instead of protein.
From the Division of Gastroenterology, Department of Internal Medicine, University of Michigan School of Medicine, and the Ann Arbor Veterans Affairs Medical Center, Ann Arbor, Mich.
Address reprint requests to Dr. McDonnell at 111D Internal Medicine, Ann Arbor Veterans Affairs Medical Center, 2115 Fuller Rd., Ann Arbor, MI 48105.
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