In addition to producing stem cells to treat spinal cord injuries, Geron says, it has seven other types of cells derived from stem cells in its pipeline.
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.
Stem cells derived from umbilical cords are less versatile than embryonic stem cells, which could conceivably replace any cell in the body.
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.
But it is not yet known whether tissues derived from embryonic stem cells would cause transplant rejection, whereas this does not seem to be a problem with adult stem cells.
These iPS cells, like stem cells derived from embryos, can be turned into many different kinds of cells, and researchers believe they eventually could be used to regenerate tissue for organs and repair damage.
For about a decade, scientists have experimented with the use of stem cells to try and repair the heart, mostly in animals and mostly using stem cells derived from bone marrow.
That means the controversy about using stem cells derived from human embryos is largely absent from this line of research.
President George W. Bush 's decision to allow federal funding for research on stem cells derived from human embryos does not change this.
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.
In mice, Daley and colleagues have shown that stem cells derived from the nuclear transfer of cells to make embryos -- the technique described in Mitalipov's paper -- were indeed closer to natural embryo stem cells than induced pluripotent stem cells.
Then, within several days, embryos genetically identical to the baby were created, from which stem cells were derived.
Two years later, though, one researcher derived the first human embryonic stem cells by turning to private funding.
Edward Kennedy, D-Massachusetts, who heads the committee, requested the names of the research groups who have human embryonic stem cell lines, information on where their research has been published, and details about proprietary rights and what ethical standards were used when the stem cells were derived.
Stem cells can also be derived from cells taken from an adult.
Also known as reprogrammed stem cells, iPSCs are derived from somatic cells taken from adults, and offer researchers a way to examine the development of diseases.
FORBES: Aberrations Pose A Challenge for Reprogramming Stem Cells
Widely known for its oncology franchise, Celgene is expanding its medical applications to include inflammation, immune disorders and proprietary stem cell products derived from human placental cells.
At the moment colonies of human stem cells have to be grown on layers of tissue derived from mice.
The researchers showed that it could be used to grow mesenchymal stem cells (MSCs), a kind of primitive cell derived from bone marrow that can be easily grown in culture.
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