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Proteolix's Carfilzomib Receives Orphan Drug Designation for Treatment of Multiple Myeloma

SOUTH SAN FRANCISCO, Calif., April 2, 2008 /PRNewswire/ -- Proteolix, Inc., a clinical-stage company engaged in the development of novel pharmaceutical therapies for the treatment of cancer and immunological conditions, announced today that the U.S. Food and Drug Administration (FDA) has granted orphan drug designation to carfilzomib, a selective blocker of proteasome activity for the treatment of multiple myeloma. The orphan drug designation encompasses all subsets of multiple myeloma and Waldenstrom's macroglobulinemia.

"I am very pleased by our receipt of this designation for carfilzomib," said Susan Molineaux, Ph.D., the Company's President and CEO. "To date we have been encouraged by carfilzomib's early-stage clinical results in multiple myeloma, and we continue to believe it has the potential to offer cancer patients a new and effective treatment for their disease."

The Orphan Drug Act of 1983 allows the FDA to grant orphan drug status to novel drugs or biologics that treat a rare disease or condition affecting fewer than 200,000 patients in the U.S. According to the SEER Database of the National Cancer Institute (2004), the U.S. prevalence of multiple myeloma was 53,712 patients. The Orphan Drug Act provides the drug developer with several financial benefits and incentives related to the orphan drug, including tax credits for clinical research costs, ability to apply for annual grant funding, clinical research trial design assistance, waiver of Prescription Drug User Fee Act (PDUFA) filing fees, and a seven-year period of U.S. marketing exclusivity if the drug is the first of its type approved for the specified indication.

About Multiple Myeloma

Multiple myeloma is cancer of the plasma cell. It begins in the bone marrow, where blood cells are made. The plasma cell is a type of white blood cell that fights infections by making antibodies. Cancerous plasma cells, also called myeloma cells, divide and grow out of control, building up in the marrow and crowding out healthy blood cells. The myeloma cells do not make effective antibodies and instead release abnormal proteins, called M proteins. M proteins can damage the immediate area and travel through the bloodstream and damage other parts of the body. Left untreated, multiple myeloma can cause bone damage, elevated blood calcium, anemia, and predisposition to infection and kidney damage. In 2007, there were an estimated 19,900 new cases diagnosed and 10,790 deaths due to multiple myeloma in the United States. For more information on multiple myeloma go to

About Waldenstrom's Macroglobulinemia

Waldenstrom's Macroglobulinemia (WM) is a slow-growing type of non-Hodgkin's lymphoma that starts in white blood cells called B lymphocytes. WM is also called lymphoplasmacytic lymphoma because it occurs when abnormal lymphoplasmacytic cells multiply out of control, producing large amounts of a protein called monoclonal immunoglobulin M. WM can result in enlargement of the liver and spleen due to anemia and large amounts of immunoglobulin M can lead to hyperviscosity syndrome, in which the blood becomes abnormally thick. Symptoms of this syndrome include visual problems such as blurring or loss of vision and neurological problems including headache, dizziness, or vertigo. WM is a rare cancer with only about 1,500 new cases diagnosed annually in the United States. For more information about WM, go to

About Proteolix

Proteolix, Inc. is a privately-held biopharmaceutical company, headquartered in South San Francisco, and dedicated to discovering, developing and commercializing pharmaceutical therapies that target certain cancers and immunological conditions by inhibiting the proteasome and thereby disrupting protein turnover in cells. Phase 1 clinical studies with carfilzomib, the Company's lead product, have shown that patients with hematologic malignancies who have relapsed or progressed following multiple therapies can achieve durable anti-tumor responses. Carfilzomib is currently in Phase 2 clinical studies to evaluate its safety and efficacy in multiple myeloma, lymphoma and solid tumor malignancies. Proteolix is also developing a pipeline of next-generation proteasome inhibitors, including an oral proteasome inhibitor and a selective immunoproteasome inhibitor. For more information, please visit the Company's website at

Contact information:

Matthew Ferguson


SOURCE Proteolix, Inc.
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