Scientists have found a way to make an almost limitless supply of stem cells that could safely be used in patients while avoiding the "ethical" dilemma of destroying embryos:
In a breakthrough that could have huge implications, British and Canadian scientists have found a way of reprogramming skin cells taken from adults, effectively winding the clock back on the cells until they were in an embryonic form.
...
Because the cells can be made from a patient's own skin, they carry the same DNA and so could be used without a risk of being rejected by the immune system.
Scientists showed they could make stem cells from adult cells more than a year ago, but the cells could never be used in patients because the procedure involved injecting viruses that could cause cancer. Overcoming the problem has been a major stumbling block in efforts to make stem cells fulfil their promise of transforming the future of medicine.
Now, scientists at the universities of Edinburgh and Toronto have found a way to achieve the same feat without using viruses, making so-called induced pluripotent stem (iPS) cell therapies a realistic prospect for the first time.