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Tocagen Reports Results of Toca 5 Phase 3 Trial in Recurrent Brain Cancer

SAN DIEGO, Sept. 12, 2019 /PRNewswire/ -- Tocagen Inc. (Nasdaq: TOCA), a clinical-stage, cancer-selective gene therapy company, today announced that the Toca 5 Phase 3, randomized, multi-center clinical trial evaluating Toca 511 & Toca FC in patients with recurrent high grade glioma (HGG) undergoing resection missed the primary endpoint of overall survival compared to standard of care treatment (11.1 months median compared to 12.2 months, HR=1.06, p=0.6154). In addition, all secondary endpoints showed no meaningful difference between the arms of the trial. The safety, tolerability and adverse event profile of Toca 511 & Toca FC was as expected for this patient population.

Further analysis of the Toca 5 trial data is currently underway and presentation of the results is planned at an upcoming medical conference.

"Recurrent brain cancer represents a very high unmet medical need and patients with this disease have very few treatment options," said Marty Duvall, chief executive officer of Tocagen. "While the Toca 5 trial results are disappointing, we will be conducting a thorough analysis of the data including molecular analyses and pre-planned subgroups. In addition, we will be conducting an operational review. We sincerely appreciate the exceptional support from patients and their families as well as patient advocates, physicians and our employees who have been committed to the rigorous study of Toca 511 & Toca FC in the Toca 5 trial."

About Toca 511 & Toca FC

Tocagen's lead product candidate is a two-part cancer-selective immunotherapy comprising an investigational biologic, Toca 511, and an investigational small molecule, Toca FC. Toca 511 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, only infected cancer cells carry the CD gene and produce CD. Toca FC is an orally administered 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 resulting in anti-cancer immune activation and subsequent tumor killing.

About Tocagen

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. Tocagen's lead investigational product candidate, Toca 511 & Toca FC, is under evaluation in a Phase 2/3 trial for patients newly diagnosed with glioblastoma, sponsored by the NCI and conducted by NRG Oncology, and a Phase 1 trial in patients with non-muscle invasive bladder cancer. Tocagen is advancing preclinical programs from its versatile gene therapy platform that represents a new approach in cancer immunotherapy. For more information about Tocagen, visit www.tocagen.com.

Sep 12, 2019

https://www.prnewswire.com/

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