Amgen Announces Positive Top-Line Results From Second Phase III Study Of AMG 416
Amgen has announced that a second placebo-controlled Phase III study evaluating AMG 416 for the treatment of secondary hyperparathyroidism (SHPT) in patients with chronic kidney disease (CKD), receiving hemodialysis, met its primary and all secondary endpoints. The primary endpoint was the proportion of patients with >30% reduction from baseline in parathyroid hormone (PTH) levels during an Efficacy Assessment Phase (EAP) defined as the period between weeks 20 and 27. These results follow the recent announcement of positive data from a prior placebo-controlled Phase III study of AMG 416 which was similar in design and size.
In the AMG 416 group, 74.0% of patients achieved a > 30 percent reduction from baseline in PTH compared with 8.3% in the placebo arm, a statistically significant result. Secondary endpoints included the percent change from baseline during the EAP in serum phosphorus (P) concentration (mean changes of -7.71 and -1.31% among patients in the AMG 416 and placebo arms, respectively) and corrected calcium (cCa) concentration (mean changes of -7.29 and 1.18% among patients in the AMG 416 and placebo arms, respectively). Both of these secondary endpoint results were statistically significant.
"The results from this second Phase III study help to confirm that AMG 416 could become an important new treatment option for dialysis patients with secondary hyperparathyroidism," said Sean E. Harper, MD, executive vice president of R&D at Amgen. "Despite the variety of options available for the treatment of this disease, an unmet need remains for an intravenous therapy that can be administered along with hemodialysis. We look forward to sharing results of a head-to-head study evaluating AMG 416 compared to cinacalcet next year."
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