Keryx Biopharmaceuticals, Inc. (NASDAQ:KERX) is an emerging biopharma company that has a pair of lead compounds in late stage development: Perifosine for the treatment of cancer and Zerenex for patients suffering from renal disease.
Last December, Keryx announced the initiation of a Phase 3 pivotal study of Perifosine (KRX-0401), the Company’s PI3K/Akt pathway inhibitor (a cell signaling pathway that disrupts the normal cell cycle / programmed cell death and leads to chemotherapy drug resistance in some cancer cells), in multiple myeloma patients under a Special Protocol Assessment (SPA) with the FDA with Fast Track designations for this indication.
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Perifosine is in-licensed by Keryx from Aeterna Zentaris. Keryx expects a patient recruitment period of approximately 16-18 months and expects to report data from this study during 2H11. In addition, a refractory metastatic colorectal cancer (mCRC) study under SPA is expected to begin 2Q10 with projected completion 2H11.
During the first week of 2010, Keryx announced that it has reached agreement with the FDA regarding a SPA for the design of a Phase 3 clinical program for Zerenex (ferric citrate), which is the Company’s iron-based phosphate binder for the treatment of elevated serum phosphorous levels (hyperphosphatemia occurs in the majority of dialysis patients, resulting in serious medical complications such as blood vessel calcification and skeletal deformities since phosphate is a major component of bone along with calcium) in patients with end-stage renal disease (ESRD) that are on dialysis.
Zerenex works by forming iron-phosphate complexes in the gut that are not absorbed since patients with ESRD are prone to electrolyte disorders such as elevated phosphorus due to the absence of normal kidney function. In accordance with the Company’s SPA agreement with the FDA, the Phase 3 clinical program for Zerenex will consist of two clinical studies, including (1) a short-term efficacy study that is expected to commence by the end of 1Q10 with date expected during 2H10; and (2) a long-term safety and efficacy study that is expected to begin mid-2010 with data expected and a NDA filing expected during 1H12.
Keryx has retained all key commercial rights for its two lead compounds and has the resources to complete Phase 3 development for both of its lead compounds, which provides more leverage in partnership discussions. The estimated cash burn rate for 2010 is $1.3 million per month or approximately $4 million per quarter and $16 million for the entire year.
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