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  • Title: Darbepoetin alfa (KRN321) is safe and effective when administered subcutaneously once every 2 or 4 weeks to patients on peritoneal dialysis in Japan.
    Author: Kubota M, Hiramatsu M, Yamakawa M, Fukuhara S, Morita S, Iwasaki M, Akizawa T, KRN321 SCA10 Study Group.
    Journal: Clin Exp Nephrol; 2011 Dec; 15(6):884-92. PubMed ID: 21898029.
    Abstract:
    BACKGROUND: Darbepoetin alfa (KRN321) is a recombinant protein that stimulates erythropoiesis by the same mechanism as endogenous erythropoietin. Due to its longer half-life and greater biological activity than recombinant human erythropoietin (rHuEPO), KRN321 maintains an effective hemoglobin (Hb) level at extended dose intervals compared with rHuEPO. The efficacy and safety of KRN321 administered subcutaneously to patients on peritoneal dialysis (PD) were tested. METHODS: In a multicenter, open-label, single-arm study, KRN321 was administered subcutaneously to patients on PD for 26-28 weeks. Ninety-six patients initially were given a 60 μg subcutaneous dose once every 2 weeks until a target of Hb (11.0-13.0 g/dL) was achieved. Thereafter, their dose was every 2 or 4 weeks. RESULTS: After the target of Hb was reached in most subjects (96.9%), it was maintained with KRN321 administered every 2 or 4 weeks. On completion of (or withdrawal from) study, 65 subjects (67.7%) maintained the target Hb. Although a number of adverse event related to hypertension occurred, their incidence did not appear to be related to Hb or its rate of increase. These events could be controlled adequately by interrupting or reducing the dose, and/or treatment with antihypertensives. CONCLUSIONS: The efficacy and safety of KRN321 when administered subcutaneously for 28 weeks to PD patients were confirmed. It was suggested that the quality of life of patients can be improved by treatment with KRN321 due to the reduced frequency of administration.
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