Word: embryos
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Ibrahim J. Domian, the first author on the paper and an HMS instructor, said color receptors were used to tag heart cells in a genetically-modified mouse embryo. This color-coding approach was used to identify and purify a rare daughter cell of a master heart stem cell that the researchers then used to make a an actual working heart muscle cell...
...continues ovulating after becoming pregnant and when that second, fertilized egg is able to implant itself in the lining of the womb - two things that wouldn't happen in a normal pregnancy. Typically, hormonal changes prevent further ovulation and thicken the lining of the uterus to preclude a second embryo from attaching. Why didn't that happen with Grovenburg? No one's really sure. (See how to prevent illness...
This week, scientists at the Harvard Stem Cell Institute (HSCI) reported the first success in generating new populations of insulin-producing cells using skin cells of Type 1 diabetes patients. The achievement involved the newer embryo-free technique for generating stem cells, and marked the first step toward building a treatment that could one day replace a patient's faulty insulin-making cells with healthy, functioning ones. (See the top 10 medical breakthroughs...
...effort to balance ethics and scientific advancement, the Obama Administration announced new guidelines for embryonic stem cells that could dramatically expand taxpayer-funded research. The rules, released on July 6 by the National Institutes of Health (NIH), allow federal spending to study existing stem-cell lines, provided the embryos were freely donated and meet other ethical requirements. Stem cells derived from human embryos can grow into a wide range of organs and tissues; scientists believe they hold great promise in curing diseases, though critics believe embryo destruction is morally wrong. President Obama, who promised during his campaign to boost federal...
...Nayernia is currently testing whether mouse eggs fertilized with IVD sperm can lead to a healthy animal.) If the researcher can generate human IVD sperm that look like normally developed sperm and can get the artificially created germ cells to fertilize an egg, then he can allow the resulting embryo to develop for 14 days - according to U.K. law, embryos created for research purposes must be destroyed at that point. "We would need to study that embryo before we provide any clinical applications," he says...