CTL019 is a clinical trial of T cell therapyfor patients with B cell cancers such as acute lymphoblastic leukemia (ALL), B cell non-Hodgkin lymphoma (NHL), and the adult disease chronic lymphocytic leukemia (CLL). At this time, The Children's Hospital of Philadelphia is the only hospital enrolling pediatric patientson this trial.
In July 2014, CTL019 was awarded Breakthrough Therapy designation by the U.S. Food and Drug Administration for the treatment of relapsed and refractory adult and pediatric acute lymphoblastic leukemia (ALL). The investigational therapy is the first personalized cellular therapy for the treatment of cancer to receive this important classification.
In this clinical trial, immune cells called T cells are taken from a patient's own blood. These cells are genetically modified to express a protein which will recognize and bind to a target called CD19, which is found on cancerous B cells. This is how T cell therapy works:
30 patients with acute lymphoblastic leukemia (25 children and 5 adults) have been treatedusing T cell therapy.Of those patients:
The most recent results were published in The New England Journal of Medicine in October 2014. Scientists at The Childrens Hospital of Philadelphia and the University of Pennsylvania are very hopeful that CTL019 could in the future be an effective therapy for patients with B cell cancers. However, because so few patients have been treated, and because those patients have been followed for a relatively shorttime,it is critical that more adult and pediatric patients are enrolled in the study to determine whether a larger group of patients with B cell cancers will have the same response, and maintain that response.
At this point CHOP's capability to enroll patients is limited because of the need to manufacture the T cell product used in this therapy. Our goal is to boost enrollment soon, by increasing our manufacturing capabilities and by broadening this study to other pediatric hospitals.
T cell therapy is a treatment for children and adolescents with fairly advanced B cell acute lymphoblastic leukemia (ALL) and B cell lymphomas, but not other leukemias or pediatric cancers. It is an option for those patients who have very resistant ALL.
Roughly 85 percent of ALL cases are treated very successfully with standard chemotherapy. For the remaining 15 percent of cases, representing a substantial number of children in the United States, chemotherapy only works temporarily or not at all. This is not a treatment for newly diagnosed leukemia, only for patients whose leukemia is not responding to chemotherapy,and whose disease has come back after a bone marrow transplant.
It is important to note that while results of this study are encouraging, it is still very early in testing and that not all children who qualify for the trial will have the same result.
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T Cell Therapy (CTL019) | The Children's Hospital of ...
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