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Original Article
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Volume 338:1272-1278 April 30, 1998 Number 18
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Recombinant Human Interleukin-2, Recombinant Human Interferon Alfa-2a, or Both in Metastatic Renal-Cell Carcinoma
Sylvie Negrier, M.D., Bernard Escudier, M.D., Christine Lasset, M.D., Jean-Yves Douillard, M.D., Ph.D., Jacqueline Savary, M.D., Christine Chevreau, M.D., Alain Ravaud, M.D., Alain Mercatello, M.D., Jean Peny, M.D., Mireille Mousseau, M.D., Ph.D., Thierry Philip, M.D., Thomas Tursz, M.D., for The Groupe Français d'Immunothérapie

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ABSTRACT

Background Recombinant human interleukin-2 (aldesleukin) and recombinant human interferon alfa can induce notable tumor regression in a limited number of patients with metastatic renal-cell carcinoma. We conducted a multicenter, randomized trial to determine the effect of each cytokine independently and in combination, and to identify patients who are best suited for this treatment.

Methods Four hundred twenty-five patients with metastatic renal-cell carcinoma were randomly assigned to receive either a continuous intravenous infusion of interleukin-2, subcutaneous injections of interferon alfa-2a, or both. The main outcome measure was the response rate; secondary outcomes were the rates of event-free and overall survival. Predictive factors for response and rapid progression were identified by multivariate analysis.

Results Response rates were 6.5 percent, 7.5 percent, and 18.6 percent (P<0.01) for the groups receiving interleukin-2, interferon alfa-2a, and interleukin-2 plus interferon alfa-2a, respectively. At one year, the event-free survival rates were 15 percent, 12 percent, and 20 percent, respectively (P = 0.01). There was no significant difference in overall survival among the three groups. Toxic effects of therapy were more common in patients receiving interleukin-2 than in those receiving interferon alfa-2a. Response to treatment was associated with having metastasis to a single organ and with receiving the combined treatment. The probability of rapid progression of disease was at least 70 percent for patients with at least two metastatic sites, liver metastases, and a period of less than one year between the diagnosis of the primary tumor and the appearance of metastases.

Conclusions Cytokines are active in a few patients with metastatic renal-cell carcinoma. The higher response rate and longer event-free survival obtained with a combination of cytokines must be balanced against the toxicity of such treatment.


Source Information

From the Departments of Medical Oncology (S.N., T.P.) and Biostatistics (C.L., J.S.), Centre Léon Bérard, Lyons; Institut Gustave Roussy, Villejuif (B.E., T.T.); Centre René Gauducheau, Nantes (J.-Y.D.); Centre Claudius Régaud, Toulouse (C.C.); Institut Bergonié, Bordeaux (A.R.); Hôpital Edouard Herriot, Lyons (A.M.); Centre François Baclesse, Caen (J.P.); and Hôpital Michalon, Grenoble (M.M.) — all in France.

Address reprint requests to Dr. Negrier at the Centre Léon Bérard, 69373 Lyons CEDEX 08, France.

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Related Letters:

Cytokine Therapy in Metastatic Renal Cancer
Stadler W. M., Vogelzang N. J., Jerian S., Keegan P., Siegel J., Davis I. D., Gleave M., Elhilali M., Negrier S., Lasset C., Escudier B., The Groupe Français d'Immunothérapie
Extract | Full Text  
N Engl J Med 1998; 339:849-851, Sep 17, 1998. Correspondence

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