Scientists Turn Human Skin Cells Into Stem Cells

The new cells are almost identical to embryonic stem cells, experts say

By Amanda Gardner
HealthDay Reporter

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TUESDAY, Nov. 20 (HealthDay News) -- Two separate groups of scientists have succeeded in turning human skin cells into cells that are very similar -- but not identical -- to embryonic stem cells.

The two teams, one based in Japan and the other in Wisconsin, used slightly different methods to achieve essentially identical goals, researchers said.

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"Embryonic stem cells can divide forever, and there has never been good evidence for such cells in adults, but this new paper shows a method to make cells essentially identical to embryonic stem cells," said James Thomson, senior author of the Wisconsin study and a professor in the departments of medicine and public health at the University of Wisconsin-Madison. "This will change the ethical debate," he said at a teleconference held Tuesday.

"We are now in a position to be able to generate patient- and disease-specific stem cells, without using human eggs or embryos," added Dr. Shinya Yamanaka, senior author of the first paper, who is affiliated with Kyoto University in Japan and the Gladstone Institute of Cardiovascular Disease in San Francisco. "These cells should be useful in understanding disease mechanisms, searching for effective and safe drugs, and treating patients with cell therapy," he said.

One outside exert agreed the achievement could shift research away from embryonic stem cells.

"Here's verification of another source of multipotent cells that could be useful for treating disease and would get around some of the ethical issues related to embryonic sources," Paul Sanberg, distinguished professor of neurosurgery and director of the University of South Florida Center for Aging and Brain Repair in Tampa, told HealthDay. "It also demonstrates that there are many cells that can be reprogrammed in the body, and this is not going to be the last time we hear of other types of cells and other ways we can make multipotent."

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