But West was once worried enough about the problem that ACT tried to create human stem cells using cow eggs.
The DNA from the one cell is reprogrammed during the process, allowing the creation of human stem cells.
At the moment colonies of human stem cells have to be grown on layers of tissue derived from mice.
But a modified approach that does not involve viruses is likely to be the ultimate way of making human stem cells.
The research team is continuing and expanding their work using human stem cells and further refining the repair cells for the heart.
She said that when human stem cells were put into a heart scaffold in 2010, they seemed to know just where to go.
WSJ: Science Fiction Comes Alive as Researchers Grow Organs in Lab
And if countries do accept the need for research involving human stem cells, a central bank with material available to all researchers is more efficient.
BBC: Embryonic stem cells can be turned into any kind of cell
President Bush has already spoken out about news from South Korea late yesterday that scientists there have managed to clone human stem cells for medical research.
Research involving human embryonic stem cells and human non-embryonic stem cells has the potential to lead to better understanding and treatment of many disabling diseases and conditions.
Hwang apologized publicly in January 2006 after a panel of scientists from Seoul National University found he had not derived human stem cells from eggs, as he claimed.
Egli is among the handful of scientists who have been working to perfect the technique with human cells and in 2011, succeeded in producing human stem cells, but with double the number of chromosomes.
They've found a way to make human embryonic stem cells without using human eggs or human embryos.
And Geron of Menlo Park, Calif. is performing animal studies on a variety of different cells derived from human embryonic stem cells, aiming to treat spinal cord injury, heart disease and diabetes.
And Geron (nasdaq: GERN - news - people ) of Menlo Park, Calif. is performing animal studies on a variety of different cells derived from human embryonic stem cells, aiming to treat spinal cord injury, heart disease and diabetes.
Seoul, South Korea (CNN) -- A disgraced South Korean scientist -- who gained fame in 2004 when he claimed to have cloned human embryonic stem cells -- on Monday was convicted of embezzling money and illegally buying human eggs, state media reported.
The world's first official trial using human embryonic stem cells in patients has been halted.
The technique relies on an adjustable "microvalve" to build up layers of human embryonic stem cells (hESCs).
BBC: Edinburgh scientists use 3D printing to produce stem cells
Geron is a company with extensive history in several leading-edge medical technologies, including human embryonic stem cells.
It is technically possible to obtain human embryonic stem cells from aborted foetuses and frozen IVF embryos.
Two years later, though, one researcher derived the first human embryonic stem cells by turning to private funding.
The research team, led by Robert Lanza, took human embryonic stem cells and coaxed them into becoming RPE cells.
Keirstead is working with human embryonic stem cells to treat spinal cord injury.
Its submission to the US Food and Drug Administration to conduct the first trial in patients of human embryonic stem cells was the largest and most complex ever submitted.
Geron and GE Healthcare, a division of General Electric, are developing and commercializing cellular assay products derived from human embryonic stem cells for use in drug discovery, development and toxicity screening.
General Electric ( GE - news - people ), are developing and commercializing cellular assay products derived from human embryonic stem cells for use in drug discovery, development and toxicity screening.
Dr Frisen reckons that they may offer several advantages over human embryonic stem cells which, although easier to manipulate, are a controversial source of new tissue because they are still mainly obtained from aborted fetuses.
James Thomson of the University of Wisconsin, who co-wrote the paper in Science and created the first human embryonic stem cells a decade ago, said on a conference call that these new cells are going to be "very powerful" in testing new medicines.
During the six years he ran the NIH under George W. Bush, Zerhouni, a pioneering radiologist raised and educated in Algeria, set the first rules for funding research on human embryonic stem cells and banned NIH scientists from taking big industry consulting fees.
This something that is in all likelihood going to happen in the years to come, and if not, in this Congress, or with this president, just about anybody in the field, the presidential candidates out there is likely to be less hostile to this or a little bit more open to the idea of full access to these human embryonic stem cells in the future.
More than 90 percent of research on using stem cells to repair the human heart involves adult stem cells, Lee said.
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