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  • Title: Response predicting factors to recombinant human erythropoietin in cancer patients undergoing platinum-based chemotherapy.
    Author: González-Barón M, Ordóñez A, Franquesa R, Constenla M, Montalar J, Gili F, Camps C, Sancho JF, Pérez-Cachot P.
    Journal: Cancer; 2002 Dec 01; 95(11):2408-13. PubMed ID: 12436449.
    Abstract:
    BACKGROUND: The response to epoetin-alpha treatment is hard to predict in cancer patients receiving chemotherapy. METHODS: One hundred and seventeen patients were enrolled in this observational study. They had a hemoglobin (Hb) level less than or equal to 10.5 g/dL, were receiving platinum chemotherapy with three cycles pending, and they did not have an iron deficiency or hemolysis. Epoetin-alpha was administered subcutaneously three times a week at a dose of 150 IU/kg. Ninety patients were examined. RESULTS: Response was defined as an increase in Hb of at least 2 g/dL during the treatment period. The response rate was 63.3%. The following data were compared between responders and nonresponders at the onset of treatment and after 2 and 4 weeks of epoetin therapy: Hb, reticulocytes, serum iron, ferritin, transferrin, transferrin saturation index, and endogenous erythropoietin levels. At baseline, these variables were similar for responders and nonresponders; after 2 weeks, responders showed higher Hb (P = 0.001) and transferrin levels (P = 0.042) and reticulocyte counts (P = 0.003); after 4 weeks, only the Hb level showed a significant difference (P < 0.0005). Changes from baseline in Hb level after 2 and 4 weeks correlated significantly (P < 0.01) with response. The change in Hb level at Week 4 was the best predictor. A change in Hb level of less than 0.5 g/dL was associated with a lack of response (predictive power, 71%); a change in Hb greater than or equal to 0.5 g/dL was associated with response (predictive power, 89%). CONCLUSIONS: Response to epoetin-alpha treatment in cancer patients receiving platinum chemotherapy can be predicted from changes in Hb level after 4 weeks of therapy.
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