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Orally active prostacyclin analogue beraprost sodium in patients with chronic kidney disease: a randomized, double-blind, placebo-controlled, phase II dose finding trial #MMPMID26475266
Koyama A; Fujita T; Gejyo F; Origasa H; Isono M; Kurumatani H; Okada K; Kanoh H; Kiriyama T; Yamada S
BMC Nephrol 2015[]; 16 (ä): ä PMID26475266show ga
Background: Evidence increasingly points to the importance of chronic hypoxia in the tubulointerstitium as a final common pathway to end-stage renal disease (ESRD). Beraprost sodium (BPS) is an orally active prostacyclin (PGI2) analogue demonstrating prevention of the progression of chronic kidney disease (CKD) in various animal models by maintaining renal blood flow and attenuating renal ischemic condition. Methods: This multicenter, randomized, double-blind, placebo-controlled, phase II trial was designed to determine the recommended dose of the sustained-release form of BPS (TRK-100STP 120 ?g/day or 240 ?g/day) in Japanese patients with CKD. TRK-100STP was administered to a total of 112 patients. The primary efficacy endpoint was the difference in the slope of the regression line of reciprocal of serum creatinine (1/SCr) over time, obtained by the least-squares method. Results: Regarding the primary endpoint, statistical superiority of TRK-100STP 240 ?g over placebo was not confirmed and so a recommended dose was not determined. Compared to placebo, however, the slope of regression line of 1/SCr, elevation of SCr and serum cystatin C during the treatment period revealed greater improvement at 120 ?g, at both doses, and at 240 ?g, respectively. In terms of safety, both TRK-100STP treatment groups were well tolerated. Conclusions: Although the study failed to meet the primary endpoint, results indicate that TRK-100STP may potentially prevent the decline in renal function of CKD patients independent of blood pressure or urinary protein levels. Trial registration: NCT02480751. June 21, 2015. Electronic supplementary material: The online version of this article (doi:10.1186/s12882-015-0130-5) contains supplementary material, which is available to authorized users.