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RadioGraphics, Vol 18, 1343-1372, Copyright © 1998 by Radiological Society of North America

REVIEWS

Gene therapy: a primer for radiologists

SD Voss and JB Kruskal
Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA.

Gene therapy is one of the most rapidly evolving areas in medicine. Radiologists should have an understanding of basic techniques used to identify and clone a gene and insert it into a vector capable of directing expression in mammalian tissues. DNA delivery systems include retroviral vectors (RNA viruses), adenoviral vectors (DNA viruses), and cationic liposomes, along with strategies that involve ultrasound- directed gene transfer, computed tomography-guided gene transfer, and transcatheter gene delivery, in particular via the hepatic artery. Genes being evaluated in preclinical and clinical trials include oncogenes, antioncogenes (tumor suppressor genes), suicide genes, conventional antimetabolites, antiangiogenesis factors, secreted immunostimulatory cytokines such as interleukins and interferons, and immunomodulatory cell surface proteins, including foreign HLA proteins and costimulatory molecules. A foundation in molecular biology is needed for the practicing radiologist interested in but unfamiliar with current gene therapy terminology and experimental strategies. Such a foundation will encourage the dissemination of basic biologic, diagnostic imaging, and interventional oncoradiologic developments and should facilitate integration of the radiologist into the gene therapy team.


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