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Stem cells found to heal damaged artery in lab study
Date:1/10/2013

Scientists at the Texas Biomedical Research Institute have for the first time demonstrated that baboon embryonic stem cells can be programmed to completely restore a severely damaged artery. These early results show promise for eventually developing stem cell therapies to restore human tissues or organs damaged by age or disease.

"We first cultured the stem cells in petri dishes under special conditions to make them differentiate into cells that are the precursors of blood vessels, and we saw that we could get them to form tubular and branching structures, similar to blood vessels," said John L. VandeBerg, Ph.D., Texas Biomed's chief scientific officer.

This finding gave VandeBerg and his team the confidence to do complex experiments to find out if these cells could actually heal a damaged artery. Human embryonic stem cells were first isolated and grown in 1998.

The results are presented in a manuscript, co-authored by Texas Biomed's Qiang Shi, Ph.D., and Gerald Shatten, Ph.D., of the University of Pittsburgh, published in the January 10, 2013 issue of the Journal of Cellular and Molecular Medicine.

The scientists found that cells derived from embryonic stem cells could actually repair experimentally damaged baboon arteries and "are promising therapeutic agents for repairing damaged vasculature of people," according to the authors.

Researchers completely removed the cells that line the inside surface from a segment of artery, and then put cells that had been derived from embryonic stem cells inside the artery. They then connected both ends of the arterial segment to plastic tubing inside a device called a bioreactor which is designed to grow cells and tissues. The scientists then pumped fluid through the artery under pressure as if blood were flowing through it. The outside of the artery was bathed in another fluid to sustain the cells located there.

Three days later, the complex structure of th
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Contact: Joseph Carey
jcarey@txbiomed.org
210-258-9437
Texas Biomedical Research Institute
Source:Eurekalert

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