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Baxter Restructures Agreement with Xenetic Biosciences

Thu, 01/30/2014 - 8:05am

Baxter International has restructured its ongoing agreement with Xenetic Biosciences, for the development of BAX 826, a recombinant Factor VIII treatment for hemophilia A under investigation to assess its potential to extend the half-life and duration of effectiveness. This program complements the company’s current development programs, which are focused on improving the pharmacokinetic profile and extending the half-life of blood coagulation factors, including Factor VIII.

''Through our Xenetic partnership, we are seeking to identify and develop a treatment that the majority of hemophilia patients could administer less frequently, potentially at once-weekly intervals, without compromising efficacy,'' said Brian Goff, head of Baxter’s global hemophilia organization. ''We are focusing our efforts on using a range of technologies to introduce new therapies and enhancements to existing therapies, each designed to improve the patient experience as we pursue our vision of a bleed-free world.''

Xenetic and Baxter previously established an exclusive worldwide agreement to develop novel forms of polysialylated blood coagulation factors, including Factor VIII, using Xenetic’s proprietary polysialic acid (PSA) technology. Under the terms of the restructured arrangement, Baxter will make an equity investment in the common stock of Xenetic and has agreed to make contingent milestone payments as well as pay royalties on future sales.

This agreement further demonstrates Baxter’s long-standing commitment to innovation in hemophilia, and bolsters the company’s broad R&D pipeline focused on a variety of challenging bleeding disorders. For example, Baxter recently announced the completion of enrollment in a Phase III clinical trial of BAX 855, its investigational, extended half-life, recombinant Factor VIII (rFVIII) treatment for hemophilia A. The company continues to expect to file for regulatory approval for BAX 855 in the United States by the end of 2014.

The company is also advancing a number of other treatments and early-stage R&D programs, including the study of BAX 335, an investigational Factor IX gene therapy treatment for hemophilia B. The vector-based technology, which provides a mechanism for the patient’s own liver to begin producing Factor IX following a single dose of the genetically engineered treatment, has the potential to re-define the concept of longer-acting therapy. A Phase I/II open-label clinical trial to assess the safety and optimal dosing schedule of BAX 335 is underway and the first patients have been dosed.

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