On December 20, 2018 Gritstone Oncology reported that the U.S. Food and Drug Administration (FDA) has granted Fast Track designation to GRANITE-001 for the treatment of colorectal cancer (Press release, Gritstone Oncology, DEC 20, 2018, View Source [SID1234564162]). GRANITE-001 is a personalized immunotherapy containing patient-specific neoantigens identified by Gritstone’s proprietary EDGETM artificial intelligence platform as the most relevant neoantigens to drive a tumor-specific T-cell attack.
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"Colorectal cancer remains a major contributor to cancer deaths and has not yet proved very amenable to first generation immunotherapy," said Andrew Allen, M.D., Ph.D., co-founder, president and chief executive officer of Gritstone Oncology. "We believe GRANITE-001 has the potential to be a valuable therapeutic option for these patients through its highly personalized design. The ability to leverage tumor markers, or neoantigens, specific to a patient’s own tumor cells in the development of a personalized immunotherapy is regarded as the next frontier of cancer therapy. We look forward to continuing our productive dialogue with the FDA under their Fast Track program as we seek to advance GRANITE-001 expeditiously for the potential benefit of patients."
The FDA grants Fast Track designation to facilitate development and expedite the review of therapies with the potential to treat a serious condition where there is an unmet medical need. A therapeutic that receives Fast Track designation can benefit from early and frequent communication with the agency, in addition to a rolling submission of the marketing application, with the objective of getting important new therapies to patients more quickly.
Ongoing Phase 1/2 Clinical Study
GRANITE-001 in combination with immune checkpoint blockade is being evaluated in a Phase 1/2 clinical study called GO-004 for the treatment of patients with common solid tumors, including metastatic non-small cell lung cancer, microsatellite stable colorectal cancer, gastroesophageal cancer, and bladder cancer. The Phase 1 study includes two parts: in part A patients receive an adenovirus-based prime with escalating doses of an RNA-based boost vaccinations in combination with anti-PD-1 therapy; and in part B patients receive the prime and the boost vaccinations at the selected dose in combination with both anti-PD-1 and anti-CTLA-4 immuno-modulatory antibodies.
About GRANITE-001
GRANITE-001 is Gritstone Oncology’s lead, personalized tumor-specific immunotherapy product candidate. It is engineered to elicit a significant T-cell response (particularly CD8+ cytotoxic T-cells) against mutation-derived tumor-specific neoantigens, or TSNA, identified for each patient through the company’s proprietary EDGE artificial intelligence platform. GRANITE-001 consists of two components, first a priming adenoviral vector followed by monthly boosting with an RNA vector, each containing the same 20 patient-specific TSNA.