Threshold Pharma Reports New Clinical Data on TH-302, Says One CR, Two Partial

Threshold Pharmaceuticals, Inc. THLD, today announced early data from the Phase 1 portion of an investigator-sponsored Phase 1/2 trial of its investigational hypoxia-targeted drug TH-302 in combination with Avastin(R) (bevacizumab) in patients with recurrent glioblastoma following bevacizumab failure (Study 4003). No dose-limiting toxicity has been reported to date at doses of TH-302 up to 670 mg/m2 plus bevacizumab at 10 mg/m2 every two weeks. Preliminary data in 14 patients showed TH-302 in combination with bevacizumab was associated with a median time to progression of 2.8 months. One patient achieved a complete response and two patients achieved partial responses. The data will be presented this evening from 7 p.m. to 9 p.m. at the 4th Quadrennial World Federation of Neuro-Oncology (WFNO) meeting held in conjunction with the 18th annual 2013 Scientific Meeting and Education Day of the Society for Neuro-Oncology (SNO), San Francisco, CA. Chemotherapy with radiotherapy is standard care for newly diagnosed glioblastoma. Bevacizumab is approved in the U.S. for progressive disease following prior therapy. After disease progression on bevacizumab, patients may start a subsequent bevacizumab-containing regimen. These patients typically progress in 5 to 8 weeks.(1,2) Three-month progression-free survival is approximately 15%.
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