Word: stemming
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Dates: during 2000-2009
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...Brawl in California" [Aug. 7] gave the impression that litigation against the California Institute of Regenerative Medicine has created an exodus of stem-cell researchers from California. In fact few if any have left, and dozens have moved to the state because of supportive state laws and stable funding opportunities. In addition, our institute recently established a training program at 16 state institutions that will train 169 young researchers, including predoctoral, postdoctoral and clinical fellows, many of whom have come from out of state or from overseas. ZACH W. HALL, PRESIDENT CALIFORNIA INSTITUTE FOR REGENERATIVE MEDICINE San Francisco...
...have demonstrated, for the first time, that human embryonic stem cells can be generated without interfering with the embryo's potential for life." --ROBERT LANZA, leader of a team that has developed a method to harvest and grow human embryonic stem cells without destroying the embryos. Scientists and politicians say questions about viability and ethics remain...
...fact remains that any stem cells created using this approach would still not qualify for federal funding - since it would entail the creation of new stem cell lines - and, in addition, still does not address concerns about harm to the embryo that many religious and conservative groups have. For members of the Catholic Church, which opposes any creation of human embryos outside of the human body, the technique still involves manipulating - and potentially harming - an embryo. "The problem is that the researchers are subjecting a human being to risks without any advantage to that individual," says Edward Furton, staff ethicist...
...even if the procedure turns out to be safe for the embryo, there remains the very real question of what quality stem cells the technique would produce. Some studies suggest that even at the eight-cell stage, when the blastomere, or single cell, is removed, the embryo has already embarked on a development path, and has assigned certain lineages to each of the eight cells; if that's the case, then the stem cells derived from a particular blastomere may already be restricted to becoming just specific types of cells - and may not be useful in generating...
...scientists are quick to point out, this report is the first of what will likely be a series of papers replicating and confirming the technique. Until more labs try and succeed in generating stem cells this way, it's not clear what role this procedure will have in resolving the stem cell impasse...