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Nature publishes results of gene therapy treatment in phase 1/2 beta-thalassemia study
Date:9/16/2010

Cambridge, Mass., September 15, 2010 bluebird bio (formerly Genetix Pharmaceuticals Inc.) an emerging leader in the development of innovative gene therapies for severe genetic disorders, today announced publication in the journal Nature of its promising Phase 1/2 data highlighting positive results of LentiGlobin gene therapy treatment in a young adult with severe beta-thalassemia, a blood disorder that is one of the most frequent inherited diseases.

The patient, who had been transfusion dependent since early childhood, has become transfusion independent for the past 21 months more than two years after treatment with the LentiGlobin vector. The study also identified a subset of cells with the corrected beta-globin gene that overexpressed a truncated form of a gene called HMGA2. The patient has not experienced any adverse events. The data show that while early on, the HMGA2 clone was a significant portion of the corrected cells, the clone levels had declined at the time the paper was prepared, and further follow up indicates the decline is continuing.

"Although based on the first treated patient, we believe these results are impressive and illustrate for the first time the significant potential for treatment of beta hemoglobinopathies using lentiviral beta-globin gene transfer in the context of autologous stem cell transplant," said Philippe Leboulch, M.D., senior author of the study and head of the Institute of Emerging Diseases and Innovative Therapies of CEA and INSERM; professor of medicine, University of Paris; and visiting professor, Harvard Medical School. "For beta-thalassemia, we have worked intensely for almost 20 years to design, develop and manufacture LentiGlobin to provide a sustained high level hemoglobin production, resulting in a major clinical benefit. It has been very rewarding to follow this patient as his life has dramatically improved since receiving our treatment."

"For the first time, a patient with sev
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Contact: Dan Budwick
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973-271-6085
Pure Communications Inc.
Source:Eurekalert

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