© 2002 by Oxford University Press
Journal of the National Cancer Institute, Vol. 94, No. 22, 1660-1661,
November 20, 2002
© 2002 Oxford University Press
EDITORIAL |
Taking Aim at Ewing's Sarcoma: Is KIT a Target and Will Imatinib Work?
Correspondence to: Brian J. Druker, M.D., Oregon Health & Science University Cancer Institute, L592, 3181 SW Sam Jackson Park Rd., Portland, OR 97239 (e-mail: drukerb@ohsu.edu).
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Ewing's sarcoma is the second most common primary bone tumor in children. Although the cure rate for localized disease is approximately 50%, it requires intensive multiagent chemotherapy, surgery, and radiation therapy. Patients with metastatic, recurrent, or refractory disease have a much poorer prognosis. In this issue of the Journal, Merchant et al. (1) evaluate the sensitivity of Ewing's sarcoma cell lines to imatinib. Ewing's sarcoma cells express the c-KIT tyrosine kinase and stem cell factor, the ligand for this receptor, thereby closing an autocrine growth stimulatory loop (2,3). Given that c-KIT is inhibited by imatinib (4,5), it is logical to determine whether this drug inhibits the growth of these
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