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  • Title: Downstaging Rai stage III B-chronic lymphocytic leukemia patients with the administration of recombinant human erythropoietin.
    Author: Pangalis GA, Siakantaris MP, Angelopoulou MK, Vassilakopoulos TP, Dimopoulou MN, Kyrtsonis MC, Konstantopoulos K, Tsaftaridis P, Vaiopoulos GA, Kontopidou FN.
    Journal: Haematologica; 2002 May; 87(5):500-6. PubMed ID: 12010663.
    Abstract:
    BACKGROUND AND OBJECTIVES: To investigate the effectiveness of recombinant human erythropoietin (r-HuEPO) on disease-related anemia in patients with B-chronic lymphocytic leukemia (B-CLL) and to explore whether improvement of anemia could delay the initiation of cytotoxic therapy. DESIGN AND METHODS: Twenty five B-CLL patients (12 males and 13 females; median age 70 years) with disease-related anemia were treated with r-HuEPO. Patients were either on no treatment or on a standard regimen, and had at least Rai stage III disease, with a hematocrit (Hct) <32%. Eleven were newly diagnosed, whereas 14 developed anemia during follow-up. Treatment induction lasted for a maximum of 3 months, during which patients were receiving 150 IU/kg of r-HuEPO s.c. t.i.w. with an escalation to 300 IU/kg t.i.w. if response was slow after one month. Responding patients were placed on maintenance r-HuEPO with 150 IU/kg s.c. once weekly, continuously. Complete response (CR) was defined as an increase of Hct to 38% or more and partial response (PR) as an increase of >6% from pretreatment level. RESULTS: CR was observed in 18/25 (72%) and PR in 2/25 (8%) of the patients. Six patients were downstaged to stage Rai 0, 9 to Rai I and 4 to Rai II. Response was sustained with maintenance therapy. At a median follow-up of 32 months only 4 of the responders required antileukemic treatment. The median survival of responders has not been reached, and 3-year survival is 84%. INTERPRETATION AND CONCLUSIONS: r-HuEPO was efficient in downstaging Rai stage III B-CLL patients, and delayed the initiation of antileukemic therapy. Whether this effect can be translated into better survival rates remains to be clarified in randomized trials.
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