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|bluebird bio Announces First Patient Treated with LentiGlobinTM Drug Product Under Amended Study Protocol in HGB-206 Phase 1 Study of Patients with Severe Sickle Cell Disease|
- LentiGlobinTM drug product had a vector copy number (DP VCN) of 3.3 copies/diploid genome, with 83% of cells lentiviral vector sequence positive (LVV+) –
“Our early clinical experience with LentiGlobin drug product in sickle
cell disease has given us a deeper understanding of the biology of this
complex disease,” said
Changes to the study protocol for HGB-206 include increasing the percentage of transduced cells through manufacturing improvements, improving myeloablation (and subsequent engraftment) by increasing the target busulfan area under the curve, introducing a minimum period of regular blood transfusions prior to stem cell collection, improved cell processing and exploring an alternate hematopoietic stem cell (HSC) procurement method. To accommodate these changes to the protocol, the study enrollment has been expanded for a total enrollment of up to 29 patients.
About the HGB-206 Study
HGB-206 is an ongoing, open-label Phase 1 study designed to evaluate the safety and efficacy of LentiGlobin BB305 Drug Product in the treatment of subjects with SCD. The study is designed to enroll up to 29 subjects. Subjects will be followed to evaluate safety and efficacy, which will be measured based on changes in red cell function tests, hemolysis markers, and frequency of clinical events secondary to SCD (e.g., vaso-occlusive crises or acute chest syndrome events).
For more information on the HGB-206 Study, please visit http://www.clinicaltrials.gov using identifier NCT02140554.
SCD is an inherited disease caused by a mutation in the beta-globin gene that results in sickle-shaped red blood cells. The disease is characterized by anemia, vaso-occlusive crisis, infections, stroke, overall poor quality of life and sometimes, early death.
Where adequate medical care is available, common treatments for patients with SCD largely revolve around management and prevention of acute sickling episodes. Chronic management may include hydroxyurea and, in certain cases, chronic transfusions. Given the limitations of these treatments, there is no effective long-term treatment. The only advanced treatment for SCD is allogeneic hematopoietic stem cell transplant (HSCT). Complications of allogeneic HSCT include a significant risk of treatment-related mortality, graft failure, graft-versus-host disease and opportunistic infections, particularly in patients who undergo non-sibling-matched allogeneic HSCT.
About bluebird bio, Inc.
With its lentiviral-based gene therapies, T cell immunotherapy expertise and gene editing capabilities, bluebird bio has built an integrated product platform with broad potential application to severe genetic diseases and cancer. bluebird bio’s gene therapy clinical programs include its Lenti-D™ product candidate, currently in a Phase 2/3 study, called the Starbeam Study, for the treatment of cerebral adrenoleukodystrophy, and its LentiGlobin™ BB305 product candidate, currently in four clinical studies for the treatment of transfusion-dependent β-thalassemia and severe sickle cell disease. bluebird bio’s oncology pipeline is built upon the company’s leadership in lentiviral gene delivery and T cell engineering, with a focus on developing novel T cell-based immunotherapies, including chimeric antigen receptor (CAR T) and T cell receptor (TCR) therapies. bluebird bio’s lead oncology program, bb2121, is an anti-BCMA CAR T program partnered with Celgene. bb2121 is currently being studied in a Phase 1 trial for the treatment of relapsed/refractory multiple myeloma. bluebird bio also has discovery research programs utilizing megaTAL/homing endonuclease gene editing technologies with the potential for use across the company’s pipeline.
bluebird bio has operations in Cambridge,
Source: bluebird bio, Inc.
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Sr. Director, Investor Relations