In December 2006, we entered into a license agreement with Halozyme Therapeutics, Inc. (Halozyme), under which we granted Halozyme a worldwide, limited exclusive license to certain of our proprietary PEGylation technology to develop, manufacture and commercialize particular products that use our proprietary PEGylation materials linked only with certain qualifying hyaluronidase protein molecules including PEGPH20 (Filing, 10-K, Nektar Therapeutics, MAR 1, 2016, View Source [SID:1234513765]).
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According to Halozyme, certain cancers, including pancreatic, breast, colon and prostate, have been shown to accumulate high levels of hyaluronan (HA). Halozyme’s FDA-approved, HYLENEX recombinant human hyaluronidase, rHuPH20, is administered subcutaneously and temporarily and reversibly degrades HA to facilitate the absorption and dispersion of other injected drugs or fluids and for subcutaneous fluid administration. However, rHuPH20 acts only locally at the injection site, is rapidly inactivated in the body, and does not survive in the blood. PEGPH20 is an investigational PEGylated form of rHuPH20, under development by Halozyme to increase the half-life of the compound in the blood and allow for intravenous administration.
Halozyme is currently evaluating PEGPH20 in a Phase 2 multicenter, randomized clinical trial evaluating PEGPH20 as a first-line therapy for patients with stage IV metastatic pancreatic cancer. Halozyme is also evaluating PEGPH20 in an on-going Phase 1b/2 multi-center, randomized clinical trial evaluating PEGPH20 as a second-line therapy for patients with locally advanced or metastatic non-small cell lung cancer. On October 2, 2014, the FDA granted Orphan Drug designation for PEGPH20 for the treatment of pancreatic cancer.
We are entitled to future development milestones and royalties on net sales subject to reduction in the absence of patent coverage. Our right to receive royalties in any particular country will expire upon the later of twelve years after first commercial sale of the product or expiration of patent rights in the particular country. We also manufacture and supply Halozyme with clinical and future commercial supply of our proprietary PEGylation materials used in the manufacture of PEGPH20.