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Leukemia patients remain in remission more than 2 years after engineered T cell therapy
Date:12/9/2012

ATLANTA -- Nine of twelve leukemia patients who received infusions of their own T cells after the cells had been genetically engineered to attack the patients' tumors responded to the therapy, which was pioneered by scientists in the Perelman School of Medicine at the University of Pennsylvania. Penn Medicine researchers will present the latest results of the trial today at the American Society of Hematology's Annual Meeting and Exposition.

The clinical trial participants, all of whom had advanced cancers, included 10 adult patients with chronic lymphocytic leukemia treated at the Hospital of the University of Pennsylvania (HUP) and two children with acute lymphoblastic leukemia treated at the Children's Hospital of Philadelphia. Two of the first three patients treated with the protocol at HUP whose cases were detailed in the New England Journal of Medicine and Science Translational Medicine in August 2011 remain healthy and in full remissions more than two years after their treatment, with the engineered cells still circulating in their bodies. The findings reveal the first successful and sustained demonstration of the use of gene transfer therapy to turn the body's own immune cells into weapons aimed at cancerous tumors.

"Our results show that chimeric antigen receptor modified T cells have great promise to improve the treatment of leukemia and lymphoma," says the trial's leader, Carl June, MD, the Richard W. Vague Professor in Immunotherapy in the department of Pathology and Laboratory Medicine and director of Translational Research in Penn's Abramson Cancer Center. "It is possible that in the future, this approach may reduce or replace the need for bone marrow transplantation."

The results pave the way for a potential paradigm shift in the treatment of these types of blood cancers, which in advanced stages have the possibility of a cure only with bone marrow transplants. That procedure requires a lengthy hospital
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Contact: Holly Auer
holly.auer@uphs.upenn.edu
215-200-2313
University of Pennsylvania School of Medicine
Source:Eurekalert

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