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Stem Cells From Hair Follicle To Repair Nerve Damage

American and Japanese scientists have successfully treated nerve damage in mice by using tissues differentiated from hair follicle stem cells, and hope to treat patients with an injured nervous system with their own hair follicle in future.//

The results of the new research suggest hair follicle stem cells can promote nervous axon growth and functional recovery after nerve injury, thus offering an opportunity for the clinical treatment of peripheral nerve diseases, said the researchers.

The team, including researchers from the Massachusetts Institute of Technology, the Kitasato University of Japan, and the University of California, San Diego, reported this achievement in the latest issue of the journal the Proceedings of the National Academy of Sciences.

Embryonic stem cells, known to be capable of differentiating into almost all tissue cells, have aroused ethical debates in many countries. Scientists also found that problems such as immunologic incompatibility are linked with embryonic stem cells.

Therefore, more recent studies have focused on adult stem cells for future clinical applications. And hair follicles afford a highly promising source of relatively abundant and accessible, active, pluripotent adult stem cells, said the researchers.

In earlier studies, the team led by Robert Hoffman, a professor at the University of California, San Diego, has induced hair follicle stem cells to differentiate into blood vessel cells and neurons. The researchers said these studies suggested the potential of hair follicle stem cells to form diverse cell types.

Now the researchers have successfully coaxed the hair follicle stem cells to evolve into the Shwann cells, a variety of glia cells that wrap around axons in the peripheral nervous system.

When injected into disabled mice with injured sciatic nerve, these Shwann cells produced myelin sheaths that surround nerve axons, and then the mice were able t o walk normally, the researchers reported.

"Therefore, by differentiating into Schwann cells, the hair follicle stem cells may stimulate the host axons to extend and, thus, to fill the transaction gap," they said in the paper.

Hair follicle stem cells may be more promising in therapies, according to the researchers. In the future, patients with injured nervous system could be cured with their own hair follicle.


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