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Science 17 October 2003:
Vol. 302. no. 5644, pp. 400 - 401
DOI: 10.1126/science.1091258

Perspectives

MEDICINE:
Gene Therapy--New Challenges Ahead

David A. Williams and Christopher Baum

The successful use of retroviral gene transfer to treat 10 patients with X-linked severe combined immunodeficiency (SCID-X1) has been welcomed as evidence of the therapeutic potential of gene therapy. However, as Williams and Baum suggest in their Perspective, the discovery that 2 of the 10 patients developed leukemia within 3 years of gene therapy (Hacein-Bey-Abina et al.) reinforces the need to develop even more specific gene therapy interventions.


D. A. Williams is in the Division of Experimental Hematology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA. E-mail: david.williams{at}cchmc.org C. Baum is in the Department of Hematology and Oncology, Hannover Medical School, Hannover, Germany. E-mail: baum.christopher{at}mh-hannover.de

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Science. ISSN 0036-8075 (print), 1095-9203 (online)