DetailsCategory: DNA RNA and CellsPublished on Monday, 07 December 2020 09:38Hits: 247
3 of 4 Patients Evaluable for Efficacy in Dose Escalation Cohorts 2 and 3 Show Objective Response, with 2 Patients Achieving Complete Response
No Observed Events of Any Grade of Cytokine Release Syndrome, Immune Effector Cell-Associated Neurotoxicity Syndrome, or Graft-vs-Host Disease
Six Doses of FT516 were Well-tolerated with No FT516-related Grade 3 or Greater Adverse Events Reported by Investigators
SAN DIEGO, CA, USA I December 04, 2020 I Fate Therapeutics, Inc. (NASDAQ: FATE), a clinical-stage biopharmaceutical company dedicated to the development of programmed cellular immunotherapies for cancer and immune disorders, today announced positive interim data from the Companys dose escalation Phase 1 study of FT516 in combination with rituximab for patients with relapsed / refractory B-cell lymphoma. FT516 is the Companys universal, off-the-shelf natural killer (NK) cell product candidate derived from a clonal master induced pluripotent stem cell (iPSC) line engineered with a novel high-affinity, non-cleavable CD16 (hnCD16) Fc receptor, which is designed to maximize antibody-dependent cellular cytotoxicity (ADCC), a potent anti-tumor mechanism by which NK cells recognize, bind and kill antibody-coated cancer cells.
We are highly encouraged by these Phase 1 data, which clearly demonstrate that off-the-shelf, iPSC-derived NK cells can drive complete responses for cancer patients and that our proprietary hnCD16 Fc receptor can effectively synergize with and enhance the mechanism of action of tumor-targeted antibodies, said Scott Wolchko, President and Chief Executive Officer of Fate Therapeutics. Importantly, the safety profile of FT516 continues to suggest multiple doses of iPSC-derived NK cells can be administered in the outpatient setting, and supports potential use across multiple lines of therapy, including as part of early-line CD20-targeted monoclonal antibody regimens, for the treatment of B-cell lymphoma.
As of a November 16, 2020 data cutoff, three patients in the second dose cohort of 90 million cells per dose and one patient in the third dose cohort of 300 million cells per dose were available for assessment of safety and efficacy. All four patients were heavily pre-treated, having received at least two prior rituximab-containing regimens. Each patient received two 30-day treatment cycles, with each cycle consisting of fludarabine and cyclophosphamide lympho-conditioning followed by three once-weekly doses of FT516, IL-2 cytokine support, and rituximab.
Safety DataAll four relapsed / refractory patients were administered FT516 in an outpatient setting with no requirement for inpatient monitoring. No dose-limiting toxicities, and no cases of any grade of cytokine release syndrome, immune effector cell-associated neurotoxicity syndrome, or graft-versus-host disease, were observed. The multi-dose, two-cycle treatment regimen was well-tolerated with no FT516-related grade 3 or greater adverse events reported by investigators. In addition, no evidence of anti-product T- or B-cell mediated host-versus-product alloreactivity was detected, supporting the potential to safely administer up to six doses of FT516 in the outpatient setting without patient matching. All grade 3 or greater treatment emergent adverse events were not related to FT516 and were consistent with lympho-conditioning chemotherapy and underlying disease.
Activity DataThree of four relapsed / refractory patients achieved an objective response, including two complete responses (CR), following the second FT516 treatment cycle as assessed by PET-CT scan per Lugano 2014 criteria. A CR was achieved in one patient with diffuse large B-cell lymphoma (DLBCL) who was most recently refractory to a rituximab-containing treatment regimen, and a CR was achieved in one patient with follicular lymphoma (FL) who had previously been treated with four rituximab-containing treatment regimens. Notably, in one patient for which an interim tumor assessment showed a partial response following the first FT516 treatment cycle, the response deepened to a CR following administration of the second FT516 treatment cycle, suggesting that additional FT516 treatment cycles can confer clinical benefit.
M = million; CR = Complete Response; PR = Partial Response; PD = Progressive DiseaseAs of November 16, 2020 database entry. Data subject to cleaning and source document verification.1 Day 29 of the second FT516 treatment cycle as assessed per Lugano 2014 criteria
Dose escalation is continuing in the current dose cohort of 300 million cells per dose in combination with rituximab, and a fourth dose cohort of 900 million cells per dose in combination with rituximab is planned. The Company previously reported that two patients treated in the first dose cohort of 30 million cells per dose in combination with rituximab showed a protocol-defined response assessment of progressive disease. No events of cytokine release syndrome, immune effector cell-associated neurotoxicity syndrome, or graft-versus-host disease were observed in either patient.
About Fate Therapeutics iPSC Product PlatformThe Companys proprietary induced pluripotent stem cell (iPSC) product platform enables mass production of off-the-shelf, engineered, homogeneous cell products that can be administered with multiple doses to deliver more effective pharmacologic activity, including in combination with 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 Companys first-of-kind approach involves engineering human iPSCs in a one-time genetic modification event and selecting a single engineered 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 for patient treatment. As a result, the Companys platform is uniquely capable of overcoming numerous limitations associated with the production of cell therapies using patient- or donor-sourced cells, which is logistically complex and expensive and is subject to batch-to-batch and cell-to-cell variability that can affect clinical safety and efficacy. Fate Therapeutics iPSC product platform is supported by an intellectual property portfolio of over 300 issued patents and 150 pending patent applications.
About FT516FT516 is an investigational, universal, off-the-shelf natural killer (NK) cell cancer immunotherapy derived from a clonal master induced pluripotent stem cell (iPSC) line engineered to express a novel high-affinity 158V, non-cleavable CD16 (hnCD16) Fc receptor, which has been modified to prevent its down-regulation and to enhance its binding to tumor-targeting antibodies. CD16 mediates antibody-dependent cellular cytotoxicity (ADCC), a potent anti-tumor mechanism by which NK cells recognize, bind and kill antibody-coated cancer cells. ADCC is dependent on NK cells maintaining stable and effective expression of CD16, which has been shown to undergo considerable down-regulation in cancer patients. In addition, CD16 occurs in two variants, 158V or 158F, that elicit high or low binding affinity, respectively, to the Fc domain of IgG1 antibodies. Scientists from the Company have shown in a peer-reviewed publication (Blood. 2020;135(6):399-410) that hnCD16 iPSC-derived NK cells, compared to peripheral blood NK cells, elicit a more durable anti-tumor response and extend survival in combination with anti-CD20 monoclonal antibodies in an in vivo xenograft mouse model of human lymphoma. Numerous clinical studies with FDA-approved tumor-targeting antibodies, including rituximab, trastuzumab and cetuximab, have demonstrated that patients homozygous for the 158V variant, which is present in only about 15% of patients, have improved clinical outcomes. FT516 is being investigated in an open-label, multi-dose Phase 1 clinical trial as a monotherapy for the treatment of acute myeloid leukemia and in combination with CD20-targeted monoclonal antibodies for the treatment of advanced B-cell lymphoma (NCT04023071). Additionally, FT516 is being investigated in an open-label, multi-dose Phase 1 clinical trial in combination with avelumab for the treatment of advanced solid tumor resistant to anti-PDL1 checkpoint inhibitor therapy (NCT04551885).
About Fate Therapeutics, Inc.Fate Therapeutics is a clinical-stage biopharmaceutical company dedicated to the development of first-in-class cellular immunotherapies for cancer and immune disorders. The Company has established a leadership position in the clinical development and manufacture of universal, off-the-shelf cell products using its proprietary induced pluripotent stem cell (iPSC) product platform. The Companys immuno-oncology product candidates include natural killer (NK) cell and T-cell cancer immunotherapies, which are designed to synergize with well-established cancer therapies, including immune checkpoint inhibitors and monoclonal antibodies, and to target tumor-associated antigens with chimeric antigen receptors (CARs). The Companys immuno-regulatory product candidates include ProTmune, a pharmacologically modulated, donor cell graft that is currently being evaluated in a Phase 2 clinical trial for the prevention of graft-versus-host disease, and a myeloid-derived suppressor cell immunotherapy for promoting immune tolerance in patients with immune disorders. Fate Therapeutics is headquartered in San Diego, CA. For more information, please visit http://www.fatetherapeutics.com.
SOURCE: Fate Therapeutics
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