Embryo-friendly technique produces stem cells

By Maggie Fox, Health and Science Editor

WASHINGTON, Jan 10 (Reuters) - A company that devised a way to make embryonic stem cells using a technique it said does not harm human embryos reported on Thursday it has grown five batches of cells using this method and urged President George W. Bush to endorse it.

Massachusetts-based Advanced Cell Technology has been working with a method sometimes used to test embryos for severe genetic diseases. Called preimplantation genetic diagnosis, it involves taking a single cell from an embryo when it contains only eight or so cells.

The method usually does not harm the embryo, which is frozen for possible future implantation into the mother's womb. The ACT team also froze the embryos and used the single cell that was removed as a source of human embryonic stem cells.

Dr. Robert Lanza, ACT's scientific director, said it provides a way to create mass quantities of embryonic stem cells without harming a human embryo. Current stem cell technologies require the embryo's destruction.

"This is a working technology that exists here and now. It could be used to increase the number of stem cell lines available to federal researchers immediately," Lanza said by e-mail. "We could send these cells out to researchers tomorrow."

Embryonic stem cells are the body's master cells. They can give rise to every other cell type and are found in the earliest-stage embryos.

Researchers agree they could transform medicine. But some people including Bush object to methods that might destroy human embryos, and federal funding for such research is strictly limited.