Keryx Biopharma rockets on new Zerenex data and plans to file for approval

29 January 2013

USA-based Keryx Biopharmaceuticals (Nasdaq: KERX) saw its shares close up a whopping 77% to $4.70 in New York yesterday after it announced successful top-line results from the long-term Phase III study of Zerenex (ferric citrate), the company's ferric iron-based phosphate binder drug candidate, for the treatment of elevated serum phosphorus levels, or hyperphosphatemia, in patients with end-stage renal disease (ESRD) on dialysis.

In this study, Zerenex met the study's primary endpoint, demonstrating a highly statistically significant change in serum phosphorus versus placebo over the four-week efficacy assessment period of the study.

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