Scientists Grow Mouse Teeth From Single Cells
02.19.07, 12:00 AM ET
MONDAY, Feb. 19 (HealthDay News) -- Using tissue regeneration technology, Japanese researchers have been able to grow a new tooth from single mouse tooth cells and use it to replace natural teeth in a mouse.
The achievement is "a breakthrough in the development of bioengineered organs and proposes a novel concept for the organ replacement in future regenerative therapies," lead researcher Takashi Tsuji, associate professor, Department of Biological Technology, Tokyo University of Science, said in a prepared statement.
Reporting in the Feb. 19 online issue of the journal Nature Methods, Tsuji's team started by using the two cell types that form teeth -- mesenchymal and epithelial cells. They grew sufficient quantities of each of these cells and then injected them into a drop of collagen. This eventually developed into a budding tooth, which they transplanted into the cavity left by an extracted tooth in a mouse. . .
Regeration and cloning of limbs leads to a whole host of ethical issues that no one has confronted yet with the exception of a few Science Fiction writers. Our society as a whole has had no real discussion or discourse on the implications of such technologies because scientfic/medical research is far outpacing the ability of our society to digest these changes and adopt a coherent, consensus regarding these changes. For example, regeneration may lead to longer life spans for those here whenn it is fully realized, but may also lead to the birth of fewer children, resulting in the loss of some genes and increased risk of decimating plagues.
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