Fate Therapeutics Announces First Patient Treated with iPSC-derived NK Cell Cancer Immunotherapy FT500 Successfully Completes Initial Safety Assessment
No Dose-Limiting Toxicities or Serious Adverse Events Reported following Three Once Weekly Doses of Universal, Off-the-Shelf NK Cell Product Candidate
New Preclinical Data of Universal, Off-the-shelf, iPSC-derived NK Cell Product Candidates FT516 and FT596 Highlighted at 2019 AACR Annual Meeting
“The ability to effectively and efficiently deliver multiple doses of a cellular immunotherapy ‘on demand’ brings us closer to our goal of transforming the treatment of cancer for more patients. This initial observation of tolerability from the first-ever cancer patient to receive multiple doses of a universal, off-the-shelf cell product derived from a clonal master iPSC line provides early clinical validation of our proprietary iPSC product platform for off-the-shelf cancer immunotherapy,” said
Two additional patients have also been treated with FT500 as a monotherapy in the first dose cohort of 1x108 cells per dose and are currently within the initial 28-day observation period. The FT500 clinical trial is a two-arm study in up to 64 patients for the treatment of advanced solid tumors. The study is designed to assess the safety and activity of three once weekly doses of FT500 as a monotherapy and in combination with one of three
FT516 Novel CD16 Receptor Promotes High-Affinity Engagement with Monoclonal Antibody Therapy
Today the Company presented preclinical data for FT516, its universal, off-the-shelf NK cell product candidate derived from a clonal master iPSC line engineered to express a novel CD16 Fc (hnCD16) receptor, at the 2019
While CD16 is naturally expressed on NK cells and mediates antibody-dependent cellular cytotoxicity, numerous clinical studies with
In preclinical studies using a B-cell lymphoma line, the Company showed that approximately 70% of peripheral blood NK cells down-regulated CD16 expression upon co-culture with rituximab, while CD16 expression on FT516 remained resistant to down-regulation. These differences resulted in a significant anti-tumor benefit in vivo where, in a human lymphoma cancer model, mice treated with peripheral blood NK cells and rituximab had a median survival time of 39 days as compared to mice treated with FT516 and rituximab, where the median survival time was not yet reached at 100 days.
FT596 CAR and CD16 Modalities Exert Synergistic Anti-Tumor Activity
The Company also presented today at AACR new preclinical data for FT596, the Company’s first iPSC-derived chimeric antigen receptor (CAR) NK cell product candidate that is designed to concurrently target multiple tumor-associated antigens. FT596 is derived from a clonal master iPSC line engineered to express a proprietary CAR targeting CD19, a hnCD16 Fc receptor, and a novel IL-15 receptor fusion.
In a mixed co-culture assay, the Company showed that the concurrent activation of the CAR and hnCD16 targeting modalities of FT596 exert synergistic anti-tumor activity. Increased degranulation (CD107a) and cytokine release (interferon-gamma and TNF-alfa) were observed upon concurrent activation of both the CAR and CD16 receptors in CD19+CD20+ Raji cancer cells with rituximab as compared to activation of each receptor alone, suggestive that dual antigen engagement may elicit a deeper and more durable response. Additionally, in a cellular cytotoxicity assay designed to model CD19 antigen escape, FT596 combined with rituximab was able to effectively eliminate leukemia and lymphoma cancer cells that were positive for CD19 antigen expression as well as those that were null for CD19 antigen expression.
FT500 is an investigational, universal, off-the-shelf natural killer (NK) cell cancer immunotherapy derived from a clonal master induced pluripotent stem cell (iPSC) line. FT500 is being investigated in an open-label, repeat-dose Phase 1 clinical trial for the treatment of advanced solid tumors in up to 64 patients, both as a monotherapy and in combination with
About Fate Therapeutics’ iPSC Product Platform
The Company’s proprietary induced pluripotent stem cell (iPSC) product platform enables mass production of off-the-shelf, engineered, homogeneous cell products that can be administered in repeat doses to mediate more effective pharmacologic activity, including in combination with cycles of other cancer treatments. Human iPSCs possess the unique dual properties of unlimited self-renewal and differentiation potential into all cell types of the body. The Company’s first-of-kind approach involves engineering human iPSCs in a one-time genetic modification event and selecting a single iPSC for maintenance as a clonal master iPSC line. Analogous to master cell lines used to manufacture biopharmaceutical drug products such as monoclonal antibodies, clonal master iPSC lines are a renewable source for manufacturing cell therapy products which are well-defined and uniform in composition, can be mass produced at significant scale in a cost-effective manner, and can be delivered off-the-shelf to treat many patients. As a result, the Company’s platform is uniquely capable of addressing the limitations associated with the production of cell therapies using patient- or donor-sourced cells, which is logistically complex and expensive and is fraught with batch-to-batch and cell-to-cell variability that can affect safety and efficacy. Fate Therapeutics’ iPSC product platform is supported by an intellectual property portfolio of over 100 issued patents and 100 pending patent applications.
This release contains "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995 including statements regarding the Company’s advancement of and plans related to its product candidates, including its ongoing and planned clinical studies, and the therapeutic potential of its NK cell product candidates, including FT500 and FT516. These and any other forward-looking statements in this release are based on management's current expectations of future events and are subject to a number of risks and uncertainties that could cause actual results to differ materially and adversely from those set forth in or implied by such forward-looking statements. These risks and uncertainties include, but are not limited to, the risk that the Company may cease or delay preclinical or clinical development of any of its product candidates for a variety of reasons (including requirements that may be imposed by regulatory authorities on the initiation or conduct of clinical trials or to support regulatory approval, difficulties or delays in patient enrollment in current and planned clinical trials, difficulties in manufacturing or supplying the Company’s product candidates for clinical testing, and any adverse events or other negative results that may be observed during preclinical or clinical development), the risk that results observed in preclinical studies of its product candidates, including FT500 and FT516, may not be replicated in ongoing or future clinical trials or studies, and the risk that its product candidates may not produce therapeutic benefits or may cause other unanticipated adverse effects. For a discussion of other risks and uncertainties, and other important factors, any of which could cause the Company’s actual results to differ from those contained in the forward-looking statements, see the risks and uncertainties detailed in the Company’s periodic filings with the
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Source: Fate Therapeutics, Inc.