Tooth created from urine in stem cell lab

Jul 30th, 2013 · Comments Off

Editor’s Choice
Main Category: Dentistry
Also Included In: Stem Cell Research
Article Date: 30 Jul 2013 – 0:00 PDT

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Their system mimics normal tooth development, which results from an interaction between two different cell types: epithelial cells, producing enamel, and mesenchymal cells, which generate the other three main tooth components of dentin, cementum and pulp.

Previous stem cell research has shown how cells can be generated from urine. It is also known that cells discarded with urea can become induced pluripotent stem cells (iPSCs) that can then generate many different cell types, including neurons and heart muscle cells.

Chinese researchers describe how stem cells derived from urine could be used to generate solid organs and tissues, including teeth. Their study is published this week in the open-access journal Cell Regeneration. The researchers hope the technique might one day help provide new, tailor-made teeth for dental patients.

Tissue culture breakthrough

?First, the team used chemicals to coax the cultured iPSCs into flat sheets of epithelial cells. They then mixed these cells with mouse embryonic mesenchymal cells, and transplanted them into mice.

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Written by: Nick Valentine

The hope for regenerative medicine

Valentine, Nick. “Tooth created from urine in stem cell lab.” Medical News Today. MediLexicon, Intl., 30 Jul. 2013. Web.
30 Jul. 2013. <http://www.medicalnewstoday.com/articles/264079.php>

?iPSCs remain a great source of hope for regenerative medicine. Not only do they avoid the controversial use of embryos, but they also come from a more readily accessible source than even cultured skin and blood. Furthermore, cells generated by this method cannot be rejected by the human immune system, being derived from the host’s own cellular material.

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Tooth created from urine in stem cell lab


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“Generation of tooth-like structures from integration-free human urine-induced pluripotent stem cells,” Cell Regeneration, published online 30 July 2013.
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Stem cell research is opening up the way for new teeth “grown” from an unlikely source – human urine.

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?To resolve these issues, the team say human mesenchymal stem cells could be substituted for mouse ones and the tissue culture conditions tweaked. In theory, this revised method could create a bioengineered tooth bud, cultured in a jar and then transplanted into the jawbone of a human patient to form a fully functional tooth.


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Three weeks later, formations had grown that physically and structurally resembled human teeth. They are of roughly the same elasticity, and contain pulp, dentin and enamel-forming cells.

Duanqing Pei and his colleagues from Guangzhou Institutes of Biomedicine and Health, and other Chinese universities have developed a novel chimeric tissue culture system that can coax these iPSCs into tiny structures that resemble teeth.

Though these structures are a new achievement, the method involves mouse cells, has a success rate of just 30% and the structures produced are only about one-third as hard as human teeth.

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