Portola Completes $60 Million Financing to Advance Its Therapeuti...(ieved tohave superior anticoagulant effe...),Health

Date:7/9/2008

ieved to have superior anticoagulant effects compared to other targets such as thrombin. Portola believes betrixaban will offer several advantages over warfarin and the FXa inhibitors in development, including a long half-life to support once-daily dosing and a low peak-to-trough concentration ratio, resulting in consistent activity that does not require monitoring or dose adjustment.

Portola has successfully completed a Phase 2 trial demonstrating betrixaban's proof of clinical concept and a favorable tolerability profile in preventing venous thromboembolism in patients undergoing knee replacement surgery. Later this year, Portola will initiate a Phase 2 clinical study in 500 patients comparing the safety and tolerability of betrixaban to warfarin, the only marketed chronic, oral anticoagulant for stroke prevention in patients with atrial fibrillation.

The other Phase 2 drug candidate is PRT060128, an antiplatelet agent that is the only intravenous (IV) and oral ADP receptor antagonist in clinical development. Portola believes that this compound may provide significant clinical benefit over clopidogrel and other antiplatelet agents in development through its immediate, high-level platelet inhibition in the acute setting and a seamless transition to predictable, reversible platelet inhibition in the chronic setting. Portola's clinical studies to date with the IV and oral formulations have shown that PRT060128 is well tolerated at high drug levels. Later this year, Portola will initiate a Phase 2 trial comparing the safety, tolerability and efficacy of the IV bolus followed by the oral formulation (60 days of therapy) of PRT060128 to clopidogrel in 800 patients undergoing elective percutaneous coronary interventions (PCI).

Expanding Early Stage Pipeline

Portola is developing a universal Factor Xa inhibitor antidote with the goal of neutralizing the effect of small molecule Factor Xa inhibitors in patients experiencing moderate or major ble
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SOURCE Portola Pharmaceuticals, Inc. Copyright©2008 PR Newswire. All rights reserved

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