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The Cutting Edge

Transformation of Stem Cells into T-cells Raises Hopes for AIDS Gene Therapy

Scientists from the UCLA AIDS Institute and the Institute for Stem Cell Biology and Medicine have derived T-cells from human embryonic stem cells, raising hopes for a gene therapy to combat AIDS. The Proceedings of the National Academy of Sciences reported the findings in its July 14, 2006, online edition.

“We may be able to use human embryonic stem cells to treat T-cell and other blood diseases,” says lead author Zoran Galic, assistant research biologist. “This could be a very important weapon in the fight against AIDS.”

The researchers cultured human embryonic stem cells and incubated them on mouse bone-marrow cells, which in turn converted them into blood-forming cells. Those cells were injected into a human thymus that had been implanted in a mouse. The thymus transformed the bloodforming cells into the T-cells that HIV targets for destruction.

“Our results indicate that it’s possible to decipher the signals that control embryonic stem cells’ development into mature T-cells,” says Jerome Zack, associate director of the UCLA AIDS Institute and professor of microbiology, immunology and molecular genetics. “This way we can eventually repopulate the immune system of patients needing T-cells.”

One of the body’s main defenses against disease, Tcells are manufactured in the thymus. The organ shrinks as we age, weakening the immune system. The scientists anticipate that their findings could give rise to gene-therapy approaches for other diseases related to T-cells such as severe combined immunodeficiency, or “bubble-boy disease.”
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Winter 2007

Winter 2007
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IN THIS ISSUE
  • Kid-sized Heart Valve Will Avoid Invasive Surgery, Reduce Pain and Speed Recovery
  • Transformation of Stem Cells into T-cells Raises Hopes for AIDS Gene Therapy
  • Placebo Study Finds Brain Activity Predicts Antidepressant Response Before Medication Begins
  • Reversing Dietary Ratio of Fatty Acids May Suppress Prostate-Cancer Growth
  • Pomegranate Juice Stabilizes PSA Levels in Men with Prostate Cancer
  • Same Genes Act Differently in Males and Females; May Explain Gender Gap in Disease, Drug Response
  • New Biosensor Provides Rapid UTI Relief, Cuts Diagnosis Time from Two Days to 45 Minutes
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