CAMBRIDGE, Mass. & MENLO PARK, Calif.--(BUSINESS WIRE)--bluebird bio, Inc. (Nasdaq: BLUE) and Forty Seven, Inc. (Nasdaq:FTSV) announced today that they have entered into a research collaboration to pursue clinical proof-of-concept for Forty Sevens novel antibody-based conditioning regimen, FSI-174 (anti-cKIT antibody) plus magrolimab (anti-CD47 antibody), with bluebirds ex vivo lentiviral vector hematopoietic stem cell (LVV HSC) gene therapy platform. This collaboration will focus on a conditioning approach aimed to deliver reduced toxicity and will initially target diseases that have the potential to be corrected with transplantation of autologous gene-modified blood-forming stem cells. If successful, the new conditioning regimen could allow for more patients to undergo gene therapy.
Autologous hematopoietic stem cell transplantation (HSCT) and most ex vivo LVV HSC gene therapies require that a patients own stem cells first be depleted from the bone marrow to facilitate the engraftment of the new (or gene-modified) HSCs through a process called conditioning. Conditioning is performed using chemotherapy or radiation, which can place patients at risk for infection and require hospitalization until bone marrow cells have recovered. In addition, conventional conditioning can place patients at risk for secondary malignancy and infertility. As a result, the overall toxicity profile of current conditioning regimens limits the types of patients who are eligible for gene therapy. It is hoped that novel antibody based conditioning regimens could avoid these toxicities.
We are excited about this collaboration, combining our industry-leading LVV HSC gene therapy platform with Forty Sevens novel antibody-based conditioning regimen, said Philip Gregory, chief scientific officer, bluebird bio. We believe that, if successful, this novel conditioning modality could not only increase the number of patients and physicians who may consider gene therapy but also improve the overall risk benefit profile for stem cell-based gene therapy, as well as potentially reduce time and costs associated with hospital visits.
Forty Seven is advancing the pioneering work on CD47 and cKIT from our scientific founder, Irv Weissmans lab. We have shown that antibody blockade of CD47 can synergize with other antibodies targeting cancer to promote tumor engulfment. Based on this experience, coupled with the results of preclinical studies, we are eager to explore this dual-antibody approach for the potential treatment of non-malignant diseases, says Jens Peter Volkmer, M.D., Founder and Vice President of Research and Development at Forty Seven.
Forty Sevens President and Chief Executive Officer, Mark McCamish, M.D., Ph.D., commented, bluebird is a leading gene therapy company and we are excited to collaborate with them. Stem cell transplantation is potentially curative for a variety of blood diseases, including genetic blood disorders like sickle cell disease and beta-thalassemia. If successful, we believe our chemo- and radiation-free, all-antibody approach could expand transplantation beyond genetic blood disorders to a range of indications for which current transplantation approaches are suboptimal. In 2020, we plan to evaluate FSI-174 in healthy volunteers, before initiating a combination study of Forty Sevens novel all-antibody conditioning regimen and bluebirds gene therapy product.
Under the terms of the agreement, bluebird bio will provide its ex vivo LVV HSC gene therapy platform and Forty Seven will contribute its innovative antibody-based conditioning regimen for the collaboration.
About FSI-174 and MagrolimabFSI-174 is a humanized monoclonal antibody targeting cKIT, which is a receptor that is highly expressed on hematopoietic stem cells. Magrolimab is a humanized monoclonal antibody targeting CD47, which is a dont eat me signal to macrophages and is expressed on all cells. Magrolimab is currently being investigated in Phase 2 clinical trials to treat cancer and has established clinical efficacy in four indications, including myelodysplastic syndrome, acute myeloid leukemia, diffuse large B cell lymphoma and follicular lymphoma, with a favorable safety profile in over 350 patients treated, including some patients treated continuously for over two years. When combined, FSI-174 sends a positive signal to macrophages to target blood forming stem cells for removal and magrolimab disengages inhibitory signals that block phagocytosis. Combination of these antibodies has shown efficient removal of blood forming stem cells, allowing for transplantation in pre-clinical models.
About bluebird bio, Inc.bluebird bio is pioneering gene therapy with purpose. From our Cambridge, Mass., headquarters, were developing gene therapies for severe genetic diseases and cancer, with the goal that people facing potentially fatal conditions with limited treatment options can live their lives fully. Beyond our labs, were working to positively disrupt the healthcare system to create access, transparency and education so that gene therapy can become available to all those who can benefit.
bluebird bio is a human company powered by human stories. Were putting our care and expertise to work across a spectrum of disorders by researching cerebral adrenoleukodystrophy, sickle cell disease, transfusion-dependent -thalassemia and multiple myeloma using three gene therapy technologies: gene addition, cell therapy and (megaTAL-enabled) gene editing.
bluebird bio has additional nests in Seattle, Wash.; Durham, N.C.; and Zug, Switzerland. For more information, visit bluebirdbio.com.
Follow bluebird bio on social media: @bluebirdbio, LinkedIn, Instagram and YouTube.
bluebird bio is a trademark of bluebird bio, Inc.
About Forty Seven Inc.Forty Seven, Inc. is a clinical-stage immuno-oncology company that is developing therapies targeting cancer immune evasion pathways based on technology licensed from Stanford University. Forty Sevens lead program, magrolimab, is a monoclonal antibody against the CD47 receptor, a dont eat me signal that cancer cells commandeer to avoid being ingested by macrophages. This antibody is currently being evaluated in multiple clinical studies in patients with myelodysplastic syndrome, acute myeloid leukemia, non-Hodgkins lymphoma, ovarian cancer and colorectal carcinoma.
For more information, please visit http://www.fortyseveninc.com or contact info@fortyseveninc.com.
Follow Forty Seven on social media: @FortySevenInc, LinkedIn
Forward-Looking StatementsThis release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Words such as "may," "will," potentially, and similar expressions (as well as other words or expressions referencing future events, conditions, or circumstances) are intended to identify forward-looking statements. These statements include those related to the research and development plans for bluebird bios and Forty Sevens respective platforms and product candidates, the timing and success of Forty Sevens collaboration with bluebird bio, Forty Sevens plans to pursue clinical proof-of-concept for FSI-174 plus magrolimab with the LVV HSC gene therapy platform, the focus on diseases that have the potential to be corrected with transplantation of autologous gene-modified blood-forming stem cells, the tolerability and efficacy of FSI-174 and magrolimab, Forty Sevens plans to continue development of FSI-174 plus magrolimab, as well as related timing for clinical trials of the same.
Any forward-looking statements are based on the companies managements 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 risks that the exploratory antibody-based conditioning platform will not be successful or will not be safe or effective in clinical trials, the risks that the collaboration between bluebird bio and Forty Seven will not continue or be successful, and the risk that the parties will not be successful in advancing the collaboration in development, the risk that potential product candidates that bluebird bio and Forty Seven develop may not progress through clinical development or receive required regulatory approvals within expected timelines or at all, the risk that clinical trials may not confirm any safety, potency or other product characteristics described or assumed in this press release and the risk that such product candidates may not be beneficial to patients or successfully commercialized. For a discussion of other risks and uncertainties, and other important factors, any of which could cause the companies actual results to differ from those contained in the forward-looking statements, see the section entitled Risk Factors in each companys most recent Form 10-K as well as discussions of potential risks, uncertainties and other important factors in subsequent filings with the Securities and Exchange Commission at http://www.sec.gov. All information contained in this press release are not guarantees of future performance and speak only as of the date hereof, and each of bluebird bio and Forty Seven disclaims any obligation to update this information to reflect future events or circumstances unless required by law.
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