Nephrology
Second-Generation Lanthanum-Based Phosphate Binders Have Potential Role in Treatment of Hyperphosphatemia in End-Stage Renal Disease
By Akanksha,Pharmacology Correspondent
Feb 1, 2005, 09:15

Spectrum Pharmaceuticals,Inc.,announced today that it has acquired worldwide exclusive rights to RenaZorb(TM)(two second-generation lanthanum-based phosphate binding agents) from Altair Nanotechnologies, Inc.

These novel non-aluminum, non-calcium phosphate binders which utilize Altair's proprietary lanthanum nanomaterial technology have the potential to treat hyperphosphatemia, i.e., high phosphorus levels in blood, in patients with end-stage renal disease (ESRD) and chronic kidney disease (CKD), with potentially as little as one tablet per meal while currently approved therapies require as many as several tablets per meal.

There are an estimated 340,000 ESRD patients in the U.S. who are on kidney dialysis, and the market for phosphate binding agents was in excess of $600 million in 2004.

According to the National Kidney Foundation, the number of ESRD patients in the U.S. is expected to double over the next decade. In addition, there are an estimated 8.4 million CKD patients, representing a potential multi-billion dollar market opportunity, who are candidates for phosphate binder therapy under the National Kidney Foundation's Kidney Disease Outcomes Quality Initiative (K/DOQI) Clinical Practice Guidelines, issued in 2003.

Under the terms of the agreement, Spectrum acquired an exclusive worldwide license to develop and commercialize these lanthanum-based phosphate binding agents for all human therapeutic and diagnostic uses. Spectrum will pay to Altair an upfront payment of 100,000 shares of restricted Spectrum common stock and will make an equity investment of $200,000 for 38,314 shares of Altair common stock. In addition, Altair is eligible to receive payments upon achievement of a clinical development and certain regulatory and sales milestones, in addition to royalties on potential net sales.

"This in-licensing of these lanthanum-based phosphate binding agents is an important step in our continued effort to build an extensive and well-diversified portfolio of drug product candidates that span all stages of development and address significant unmet medical needs," stated Rajesh Shrotriya, M.D., Chairman of the Board, Chief Executive Officer and President of Spectrum Pharmaceuticals, Inc. "We are extremely pleased to establish this alliance with Altair. We look forward to advancing these lanthanum-based phosphate binding agents into clinical trials, and pursuing the appropriate regulatory strategy to maximize its potential."

"We are delighted to have the opportunity to work with the Altair team and look forward to developing and commercializing these lanthanum-based phosphate binding agents," stated Luigi Lenaz, M.D., of Spectrum Pharmaceuticals, Inc. "We believe there is a significant unmet medical need for the treatment of hyperphosphatemia, a condition that leads to significant bone disorders and cardiovascular disease, and is associated with a significantly higher death risk in patients with chronic and end-stage kidney disease.

According to K/DOQI Guidelines, fewer than 30 percent of dialysis patients are able to achieve and maintain serum phosphorus levels in the optimal range, despite dietary phosphorus restriction and treatment with currently marketed phosphate binders.

As a non-aluminum, non-calcium phosphate binder, these lanthanum-based phosphate binding agents has the potential to become one of the preferred first-line treatment options for hyperphosphatemia under the new K/DOQI Guidelines because it has the potential to significantly improve patient compliance by lowering the daily pill burden to the lowest-in-class dosage, namely one tablet per meal, and smaller-sized tablets, in addition to a potentially more favorable safety and efficacy profile."

"We are delighted to have a collaborator for the first of our Life Sciences initiatives, these lanthanum-based phosphate binding agents, with the drug development, regulatory and commercialization expertise of Spectrum's management," stated Alan J. Gotcher, Ph. D., Chief Executive Officer of Altair Nanotechnologies, Inc. "We look forward to working with Spectrum to enhance and expedite the development of this promising compound."

"These lanthanum-based phosphate binding agents represents a new generation of high performance phosphate binding drugs that have significant promise in terms of dose and compliance," stated Dr. Ravi Thadhani, M.D., M.P.H. Department of Medicine and Renal Unit, Massachusetts General Hospital, Boston, MA. "The partnership between Altair and Spectrum is an excellent complementary marriage of leaders in their respective fields."

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