Human stem cells grown in a simulated microgravity environment develop differently than those grown under normal conditions, an Australian study has found. The finding could have implications for space colonization and long-term spaceflight.
Using a NASA-developed rotating vessel that simulates microgravity, an Australian whiz-kid researcher found the stem cells' protein expressions were vastly different than when grown in normal Earth gravity, Discovery News reports.
The brain is the body's most complicated biological machine, and as such it can be very difficult to service when something goes wrong; after our neural wiring is put in place, at a very young age, altering or rebuilding it becomes extremely challenging.
President Obama lifted the Bush-era restrictions on embryonic stem cell lines last spring, but hundreds of cell lines have remained locked away undergoing review. Now the National Institutes of Health (NIH) has finally deemed 13 embryonic lines ready for use, and could make a decision on 20 or more by Friday, the Associated Press reports.
The retina is a lush layered field of tissue lining the back of the eye, a complex mix of specialized cells that serve as a transfer station where light signals are absorbed and sent to the brain to be translated into sight.
Researchers from University of Wisconsin, Madison have now created these unique retina cells from lowly skin cells -- opening the possibility that patients with damaged or diseased retinas might some day be able to grow themselves a cure from their own skin.
Over the past decade or so, seeking federal funding for embryonic stem cell research has been a little like slamming one's head into a brick wall. Funding was banned all together in 1996, and then President Bush loosened the ban slightly (some say negligibly) by allowing funding for embryonic stem cell lines created before August 2001. Yet, this past March, the barricade seemed to be crumbling when President Obama gave an executive order to remove the ban. But wait, all you stem cell researchers. Not so fast.
Over the past decade, no topic has been more controversial in the worlds of science, politics, and religion than stem cell research. Of course, the debate has centered over the ethics of harvesting embryonic stem cells to cure degenerative diseases. But researchers at the universities of Edinburgh and Toronto may have solved the problem by devising a method to turn human skin cells into stem cells so that can be safely transplanted into humans.
U.S. cloning expert Martin Pera on the Korean cloning scandal, self-correcting science and the importance of sound PR
By Greg MonePosted 02.16.2006 at 2:00 am 0 Comments
This January, news that South Korean scientist Hwang Woo Suk fabricated research on cloned human stem cells brought more negative attention to an already controversial field. Hwang´s work had been believed to be a breakthrough. His technique for cloning embryonic stem cells genetically matched to patients might have been used by scientists worldwide to cure disease.
We must intervene to halt these aging processes, says Aubrey De Grey. the rub is, no one has figured out how
By Joseph HooperPosted 01.01.2005 at 2:00 pm 0 Comments
1. Cell Loss Our liver, kidneys and other organs keep a fair number of cells in reserve; still, over time, cell loss may impair their functioning. De Grey’s fix: Engineer embryonic stem cells to create healthy new versions of every type of body cell. Introduce the stem cells into the body to rejuvenate diseased or flagging tissues. The mechanism to deliver the various cell types to all the right places has yet to be developed.
A major foreign breakthrough highlights the limits placed on U.S. stem-cell researchers
By Helen PearsonPosted 01.01.2004 at 2:00 am 0 Comments
American stem-cell researchers have been warning for years that their work is being stifled by restrictions while scientists abroad forge ahead. In 2004 that warning hit home when a breakthrough emerged from South Korea.
A scientist's fight against embryonic stem cell research.
By Gunjan SinhaPosted 06.14.2002 at 4:54 pm 0 Comments
The national furor over human cloning is certain to continue for years, regardless of whether or not the U.S. Senate heeds President Bush's pleas to ban it. The opportunity to create embryonic stem cells that scientists say could generate every cell type in the body-thereby revolutionizing medicine-gives many people pause for ethical reasons.