Tocagen Inc., a clinical-stage, cancer-selective gene therapy company, and Beijing Apollo Venus Biomedical Technology Limited, an affiliate of ApolloBio Corp., a biopharmaceutical company focused on oncology (collectively, "ApolloBio"), have entered into a license agreement providing ApolloBio with an exclusive license to develop and commercialize Toca 511 & Toca FC within the greater China region, including mainland China, Hong Kong, Macao and Taiwan.

Toca 511 & Toca FC is a cancer-selective immunotherapy currently under evaluation in an international phase 3 trial, called Toca 5, for patients with recurrent high grade glioma (HGG), a type of brain tumor. The product candidate has received Breakthrough Therapy Designation from the U.S. Food and Drug Administration (FDA) and PRIority MEdicines (PRIME) designation from the European Medicines Agency (EMA).

Under the terms of the agreement, ApolloBio will make an upfront payment of $16 million to Tocagen, plus potential payments of $4 million in near-term development milestones, including completion of enrollment in the Toca 5 study. Tocagen will be eligible for additional future payments totaling up to $111 million upon meeting certain development and commercial milestones. In addition, low double-digit tiered royalty payments will be made based on net sales. ApolloBio will be responsible for all development and commercialization costs in the licensed territory.

"As an innovative biopharmaceutical company in China, ApolloBio is well positioned to leverage China's recent regulatory changes supporting the development of new medicines," said Marty Duvall, chief executive officer of Tocagen. "ApolloBio brings valuable regional expertise in product development, regulation and healthcare access, positioning our lead product to advance towards patients in the greater China region as quickly and efficiently as possible."   

The total number of new diagnoses of HGG expected in 2018 is about 180,000 worldwide and about 47,000 in the greater China region. Standard treatment for newly diagnosed HGG includes safe surgical removal of as much of the tumor as possible, followed by radiation therapy and chemotherapy. However, HGG recurs in most patients even after maximal treatment and there are currently very few treatment options available.

"We are committed to accelerating the availability of novel immuno-oncology treatments to patients with high unmet medical needs in the greater China region," said Dr. Weiping Yang, chief executive officer of ApolloBio. "Toca 511 & Toca FC is a highly promising, best-in-class cancer-selective immunotherapy and we look forward to working with Tocagen to advance this innovative late-stage product towards commercialization."

The license grant to ApolloBio is subject to the satisfaction of customary conditions and is expected to become effective in the second quarter of 2018.

Tocagen's lead product candidate is a two-part cancer-selective immunotherapy comprised of an investigational biologic, Toca 511 and an investigational small molecule, Toca FC. Toca 511 (vocimagene amiretrorepvec) is a retroviral replicating vector (RRV) that selectively infects cancer cells and delivers a gene for the enzyme, cytosine deaminase (CD). Through this targeted delivery, infected cancer cells carry the CD gene and produce CD. Toca FC is an orally administered, extended-release formulation of the prodrug, 5-fluorocytosine (5-FC), which is converted into an anti-cancer drug, 5-fluorouracil (5-FU), when it encounters CD. 5-FU kills cancer cells and immune-suppressive myeloid cells in the tumor microenvironment resulting in anti-cancer immune activation and subsequent tumor killing.

ApolloBio Corp. is an innovative Chinese biomedical company committed to research and development of innovative new medicines, accessing such new medicines through in-licensing, and additionally providing medical services.

Tocagen is a clinical-stage, cancer-selective gene therapy company developing first-in-class, broadly applicable product candidates designed to activate a patient's immune system against their own cancer.