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Doctors report success with gene therapy, a big win against leukemia

This microscopy image provided by Dr. Carl June on Wednesday, Aug. 10, 2011 shows immune system T-cells, center, binding to beads which cause the cells to divide. The beads, depicted in yellow, are later removed, leaving pure T-cells which are then ready for infusion to the cancer patients. Scientists are reporting the first clear success with gene therapy to treat leukemia, using the patients' own blood cells to hunt down and wipe out their cancer.  (AP Photo/Dr. Carl June).
This microscopy image provided by Dr. Carl June on Wednesday, Aug. 10, 2011 shows immune system T-cells, center, binding to beads which cause the cells to divide. The beads, depicted in yellow, are later removed, leaving pure T-cells which are then ready for infusion to the cancer patients. Scientists are reporting the first clear success with gene therapy to treat leukemia, using the patients' own blood cells to hunt down and wipe out their cancer. (AP Photo/Dr. Carl June).

Doctors are reporting a major advance against leukemia and other blood cancers.

They say an experimental treatment, gene therapy, is giving strikingly high success rates in tests on more than 120 patients with various types of leukemia, lymphoma and other blood and bone marrow cancers.

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The treatment involves removing certain white blood cells from a patient, altering them in a lab to contain a gene that attacks cancer, and returning them to the patient.

In one study, all five adults and 19 of 22 children with one type of leukemia had a complete remission, meaning no cancer could be found after treatment, although a few have relapsed since then.

Doctors will describe the studies at an American Society of Hematology conference that began Saturday in New Orleans.

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