Related topics: stem cells , barack obama , embryonic stem cells , human embryos
Stem cell
hideStem cells are cells found in most, if not all, multi-cellular organisms. They are characterized by the ability to renew themselves through mitotic cell division and differentiating into a diverse range of specialized cell types. Research in the stem cell field grew out of findings by Canadian scientists Ernest A. McCulloch and James E. Till in the 1960s. The two broad types of mammalian stem cells are: embryonic stem cells that are isolated from the inner cell mass of blastocysts, and adult stem cells that are found in adult tissues. In a developing embryo, stem cells can differentiate into all of the specialized embryonic tissues. In adult organisms, stem cells and progenitor cells act as a repair system for the body, replenishing specialized cells, but also maintain the normal turnover of regenerative organs, such as blood, skin or intestinal tissues.
Stem cells can now be grown and transformed into specialized cells with characteristics consistent with cells of various tissues such as muscles or nerves through cell culture. Highly plastic adult stem cells from a variety of sources, including umbilical cord blood and bone marrow, are routinely used in medical therapies. Embryonic cell lines and autologous embryonic stem cells generated through therapeutic cloning have also been proposed as promising candidates for future therapies.
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News tagged with stem cell research
Obama to reverse Bush limits on stem-cell research
Mar 06, 2009 |
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US President Barack Obama will on Monday sign an executive order reversing Bush administration restrictions on federal funding for stem-cell research, a senior administration official said.
Scientists succeed through stem cell therapy in reversing brain birth defects
Dec 29, 2008 |
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Scientists at the Hebrew University of Jerusalem have succeeded in reversing brain birth defects in animal models, using stem cells to replace defective brain cells.
Potential new 'twist' in breast cancer detection
Dec 04, 2009 |
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Working with mice, scientists at Johns Hopkins publishing in the December issue of Neoplasia have shown that a protein made by a gene called "Twist" may be the proverbial red flag that can accurately distinguish stem cells ...
New stem cell lines approved for tax-paid research
Dec 02, 2009 |
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(AP) -- Scientists can start using taxpayer dollars to do research with 13 batches of embryonic stem cells and the government says dozens more cell lines should be available soon, opening a new era for the potentially life-saving ...
US abortion views shift, majority are 'pro-life': poll
May 15, 2009 |
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US opinion on abortion has shifted with, for the first time in nearly 15 years, a narrow 51-percent majority identifying themselves as "pro-life," according to a new Gallup poll published Friday.
Stem Cell Research Made Safer with Latest Discovery
May 15, 2009 |
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(PhysOrg.com) -- A new development in stem cell research has resulted from a completed study by a collaboration of scientists using the drug Rapamycin to inhibit mTOR, an intracellular protein necessary in cell proliferation. ...
S.Korea lifts ban on stem cell research
Apr 29, 2009 |
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South Korea on Wednesday conditionally lifted a ban on stem cell research using human eggs, three years after outlawing the practice because a scientist was found to have faked his work.
US lifts some restrictions on embryo stem cells
Apr 17, 2009 |
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(AP) -- When President Barack Obama eased limits on taxpayer-funded embryonic stem cell research, the big question became how far scientists could go. Friday, the government answered: They must use cells culled from fertility ...
New ethical questions are being raised in stem cell research
Dec 10, 2009 |
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A groundbreaking discovery two years ago that turned ordinary skin cells back into an embryonic or "pluripotent" state was hailed as the solution to the controversial ethical question that has plagued stem-cell science for ...
Measure to change U. of Neb. stem-cell rule fails (Update 2)
Nov 21, 2009 |
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(AP) -- The University of Nebraska's governing board on Friday voted not to place tighter restrictions on embryonic stem cell research than those outlined under federal guidelines, which were expanded after ...
Embryonic stem cell therapy closer to human trials
Nov 19, 2009 |
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Embryonic stem cell therapy got a step closer to the clinic Thursday after US researchers said they filed a request for government approval of human trials.
SKorean cloning expert to re-create dogs for province
Aug 31, 2009 |
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South Korean scientist Hwang Woo-Suk plans to present two cloned dogs to one of the country's provinces to help it nurture a bio-technology industry, his research centre said Monday.
SKorea seeks jail for disgraced cloning scientist
Aug 24, 2009 |
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(AP) -- Prosecutors demanded a four-year prison term Monday for a South Korean scientist disgraced in a cloning scandal that shook the international scientific community and led to his trial on fraud and ...
New stem cell research unlocks unknown therapies
May 21, 2009 |
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New treatments for the devastating Parkinson's disease and ALS are in clinical studies in Sweden, thanks to breaking new stem cell research. This news was presented today by Dr. Jonas Frisen, Professor of stem cell research ...
US to fund research with some embryonic stem cells
Apr 19, 2009 |
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(AP) -- When President Barack Obama eased limits on taxpayer-funded embryonic stem cell research, the big question became how far scientists could go. Friday, the government answered: They must use cells culled from fertility ...
