CLINICAL TRIAL, PHASE II
JOURNAL ARTICLE
MULTICENTER STUDY
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A 12-week dose-escalating study of etelcalcetide (ONO-5163/AMG 416), a novel intravenous calcimimetic, for secondary hyperparathyroidism in Japanese hemodialysis patients .

AIMS: To evaluate dose-escalation of etelcalcetide (ONO-5163/AMG 416), a novel, intravenous (IV), long-acting calcium-sensing receptor agonist, for treatment of secondary hyperparathyroidism (SHPT) in Japanese hemodialysis patients.

MATERIALS AND METHODS: In this multicenter study, IV injections of etelcalcetide (3 times a week for 12 weeks) were administered, with dose escalation every 4 weeks depending on changes in serum intact parathyroid hormone (iPTH) and corrected calcium (cCa). A total of 24 patients participated in this study.

RESULTS: Serum iPTH was reduced in a time- and dose-dependent manner, with reductions (in pg/mL) at 12 weeks of -226.1 ± 125.3, -362.5 ± 161.5, and -412.4 ± 130.2, respectively, for maximum doses of 5, 10, and 15 mg. At the end of the treatment, 50% of patients had serum iPTH levels within the target range (60 - 240 pg/mL). Serum cCa and phosphorus were reduced in parallel with iPTH. Adverse events (AEs) occurred in 20 patients (83.3%). The most frequently observed AEs (> 10%) were either mild or moderate nasopharyngitis (29.2%), decreased serum calcium (16.7%), and vomiting (12.5%).

CONCLUSIONS: Dose-escalated triweekly etelcalcetide was effective for SHPT in Japanese hemodialysis patients and was satisfactorily tolerated.
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