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  • Title: Efficacy and safety of SBR759, a novel calcium-free, iron (III)-based phosphate binder, versus placebo in chronic kidney disease stage V Japanese patients on maintenance renal replacement therapy.
    Author: Fukagawa M, Kasuga H, Joseph D, Sawata H, Junge G, Moore A, Akiba T.
    Journal: Clin Exp Nephrol; 2014 Feb; 18(1):135-43. PubMed ID: 23670305.
    Abstract:
    BACKGROUND: SBR759, an iron (III)-based oral phosphate binder, was developed for the treatment of hyperphosphataemia in chronic kidney disease stage V patients receiving maintenance renal replacement therapy (RRT). Serum phosphate-lowering efficacy and dose response of SBR759 (3-, 6-, 9- and 12-g/day doses) were compared with placebo. METHODS: Japanese patients with hyperphosphataemia (P ≥ 5.5 mg/dL [≥ 1.78 mmol/L]) receiving maintenance RRT (N = 63) were randomised to receive either SBR759 (3-, 6-, 9-, 12-g/day dose) or placebo (12-g/day dose) for 4 weeks. The primary endpoint was change from baseline in 72-h post-dialysis serum phosphate levels at week 4 for different doses of SBR759 versus placebo. Secondary endpoints were change from baseline in serum phosphate levels and dose-dependent efficacy of SBR759 during the 4-week treatment period. RESULTS: SBR759 showed significant reduction in serum phosphate levels compared with placebo at week 4, demonstrating a significant linear dose response (P < 0.001). Incidence of adverse events was comparable between the SBR759 treatment groups (7/13 and 5/12 in the 3- and 12-g/day groups, respectively, and 8/13 in the 6- and 9-g/day groups) and was 6/12 in the placebo group. Discoloured faeces and diarrhoea were the most frequently reported adverse events. Two serious adverse events were reported--one in the SBR759 3-g/day group (1/13, skin ulcer) and one in the SBR759 12-g/day group (1/12, arthralgia). CONCLUSIONS: SBR759 showed significant phosphate-lowering efficacy and dose-dependent response compared with placebo in patients with chronic kidney disease receiving RRT.
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