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Update on the Application of Interleukin-2 in the Treatment of Renal Cell Carcinoma

Author's Affiliation: Beth Israel Deaconess Medical Center and the Dana-Farber/Harvard Cancer Center Renal Cancer Program, Boston, Massachusetts

Requests for reprints: David F. McDermott, Beth Israel Deaconess Medical Center, Kirstein Room 153, 330 Brookline Avenue, Boston, MA 02215. Phone: 617-667-1930; Fax: 617-975-8030; E-mail: dmcdermo{at}bidmc.harvard.edu.

High-dose bolus interleukin 2 (IL-2) was granted Food and Drug Administration approval based on its ability to produce durable complete responses in a small number of patients with metastatic renal cell carcinoma. Results from randomized phase 3 trials suggest that regimens involving lower doses of IL-2, either alone or in combination with IFN, produce fewer tumor regressions of less overall quality. Given the toxicity, expense, and limited efficacy of this treatment, recent studies have focused on identifying predictors of response (or resistance) to IL-2 therapy. This year, investigators launched a clinical trial designed to prospectively determine if patients who are more likely to respond to high-dose IL-2 can be identified before starting therapy. As the list of effective therapies for metastatic renal cell carcinoma grows, improvements in patient selection will be necessary to ensure that patients who might attain a durable remission with IL-2 will not miss this opportunity.

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