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Stem cell versatility could help tissue regeneration
Date:8/18/2010

Scientists have reprogrammed stem cells from a key organ in the immune system in a development that could have implications for tissue regeneration.

Their research shows that it is possible to convert one stem type to another without the need for genetic modification.

Researchers, who used rat models, grew stem cells from the thymus - an organ important for our immune systems in the laboratory using conditions for growing hair follicle skin stem cells.

The team was from the Ecole Polytechnique Fdrale de Lausanne in Switzerland and the University of Edinburgh's Medical Research Council Centre for Regenerative Medicine.

When the cells were transplanted into developing skin, they were able to maintain skin and hair for more than a year.

The transplanted follicles outperformed naturally-produced hair follicle stem cells, which are only able to heal and repair skin for three weeks.

Once they were transplanted, the genetic markers of the cells changed to be more similar to those of hair follicle stem cells.

The research, published in the journal Nature, shows that triggers from the surrounding environment in this case from the skin can reprogramme stem cells to become tissues they are not normally able to generate.

Professor Yann Barrandon, Joint Chair of Stem Cell Dynamics at the Ecole Polytechnique Fdrale de Lausanne, Universit de Lausanne and Centre Hospitalier Universitaire Vaudois, who led the study, said: "These cells change because of the environment they come into contact with, the skin. In theory this operation could be recreated with other organs as well."

When an animal develops, embryos form three cellular or germ layers ectoderm, endoderm and mesoderm which then go on to form the body's organs and tissues.

Ectoderm becomes skin and nerves, endoderm becomes the gut and organs such as the liver, pancreas and thymus, and mesoderm becomes muscle, bones
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Contact: Tara Womersley
tara.womersley@ed.ac.uk
44-131-650-9836
University of Edinburgh
Source:Eurekalert

Page: 1 2

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