Positive Glufosfamide Results From a Phase 2 Clinical Trial Presented at European Cancer Confere...(months. In addition 11 of 28 patients (3...),Health

Date:9/26/2007

months. In addition, 11 of 28 patients (39%) experienced stable disease (duration 1.2+ to 12.6+ months). Objective response was assessed radiologically after every two cycles (8 weeks) of therapy. A partial response is characterized as a decrease in size by 30% of the sum of the longest diameters of target lesions, the absence of progression of all non-target lesions and no new lesions.

Grade 3 and 4 neutropenia occurred in 8 (28%) and 15 (52%) patients. Grade 3 and 4 thrombocytopenia occurred in 8 (28%) and 2 (7%) patients. Five patients (18%) had a glufosfamide-related serious adverse event (SAE), which included renal tubular acidosis (RTA) with renal failure (2 patients), RTA alone, vomiting or nausea. Three patients died from an SAE unrelated to glufosfamide. Another patient developed an SAE of renal failure after hypotension associated with pulmonary embolus. The creatinine clearance (CrCL) fell below 60 mL/min in 10 of 27 (37%) patients with CrCL greater than or equal to 60 at baseline.

These data indicate that glufosfamide plus gemcitabine may benefit patients with chemotherapy nave pancreatic adenocarcinoma. Hematologic and renal toxicity may be greater than would be expected with either agent alone although the small numbers preclude definitive conclusions. No unanticipated adverse events based on previous experience with glufosfamide were observed.

The Phase 2 poster is available on the Threshold website at http://investor.thresholdpharm.com/calendar.cfm.

About Glufosfamide

Glufosfamide combines the active part of ifosfamide, a member of a widely used class of chemotherapy drugs known as "alkylators", with a glucose molecule. Because of its glucose component and a tumor cell's increased need for glucose, glufosfamide may be preferentially transported into tumors compared to most normal tissues. Inside cells, the linkage between glucose and the alkylat
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SOURCE Threshold Pharmaceuticals, Inc. Copyright©2007 PR Newswire. All rights reserved

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