Ultragenyx Announces Partnership with GeneTx to Advance Treatment for Angelman Syndrome

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NOVATO, Calif. and DOWNERS GROVE, Ill., Aug. 14, 2019 (GLOBE NEWSWIRE) -- Ultragenyx Pharmaceutical Inc. (NASDAQ: RARE), a biopharmaceutical company focused on the development of novel products for serious rare and ultra-rare diseases, and GeneTx Biotherapeutics LLC, today announced a partnership to develop GeneTx’s GTX-102, an antisense oligonucleotide (ASO) for the treatment of Angelman syndrome, a serious, debilitating, rare neurogenetic disorder that affects approximately 1 in 15,000 people worldwide. GTX-102 is currently in late preclinical development with an investigational new drug (IND) application expected to be filed with the U.S. Food and Drug Administration (FDA) in the first half of 2020.

“Angelman syndrome is a devastating neurological condition with no treatment options that represents a very significant unmet medical need,” said Emil D. Kakkis, M.D., Ph.D., Chief Executive Officer and President of Ultragenyx. “GTX-102 is a novel and promising potential therapy specific to the disease mechanism in these patients, and we are pleased that GeneTx chose to partner with us based on our track-record of rapid, innovative development in rare diseases.”

“GeneTx was formed by the Foundation for Angelman Syndrome Therapeutics (FAST), the largest patient organization in the Angelman community. Donations to FAST, from family and friends, supported the preclinical research on this therapeutic strategy,” stated Paula Evans, Chief Executive Officer of GeneTx. “It is entirely fitting that GeneTx would partner with a company that not only has proven expertise in the development and commercialization of rare disease therapeutics, but truly puts the patient first in each and every step of the treatment process.”

Under the terms of the agreement, Ultragenyx will make an upfront payment of $20 million for an exclusive option to acquire GeneTx. This option may be exercised any time prior to 30 days following FDA acceptance of the IND for GTX-102. Ultragenyx may extend the option period by paying an option extension payment of $25 million. Ultragenyx may exercise this extended option any time until the earlier of 30 months from the first dosing of a patient in a planned Phase 1/2 study (subject to extensions) or 90 days after results are available from that study.

During the exclusive option period, GeneTx will provide regulatory and scientific expertise as well as fund all development activities, while Ultragenyx will provide staff support, including strategic guidance and clinical expertise. The parties will collaborate on the submission of the IND and management of the Phase 1/2 study in patients with Angelman syndrome. If Ultragenyx acquires GeneTx, Ultragenyx will then be responsible for all development and commercialization activities. If Ultragenyx decides to exercise its option, it will purchase GeneTx for an initial purchase price and contingent milestones and royalties.

Individuals with Angelman syndrome have developmental delay, balance issues, motor impairment, and debilitating seizures. Some individuals with Angelman syndrome are unable to walk and most do not speak. Anxiety and disturbed sleep can be serious challenges in individuals with Angelman syndrome. While individuals with Angelman syndrome have a normal lifespan, they require continuous care and are unable to live independently. Angelman syndrome is not a degenerative disorder, but the loss of the UBE3A protein expression in neurons results in abnormal communications between neurons. Angelman syndrome is often misdiagnosed as autism or cerebral palsy. There are no currently approved therapies for Angelman syndrome; however, several symptoms of this disorder can be reversed in adult animal models of Angelman syndrome suggesting that improvement of symptoms can potentially be achieved at any age.

The company is led by a management team experienced in the development and commercialization of rare disease therapeutics. Ultragenyx’s strategy is predicated upon time and cost-efficient drug development, with the goal of delivering safe and effective therapies to patients with the utmost urgency.

For more information on Ultragenyx, please visit the Company's website at .

More news and information about Ultragenyx Pharmaceutical Inc.; GeneTx Biotherapeutics LLC

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Globe Newswire: 13:30 GMT Wednesday 14th August 2019

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