Good stem cell news
As you know, stem cells from human embryos can be used to develop into any tissue in the body. Their importance for tissue regeneration is clear, but ethical concerns over using them remain troublesome. It now seems increasingly likely that it will not be necessary to use them.
In 2005, scientists at the UK's Kingston University began using microgravity technology developed by NASA to multiply stem cells from umbilical blood in large enough quantities to be used to regenerate human tissue. The primitive stem cells in the umbilical cord blood resemble those from human embryos, but there are no ethical concerns about their use. They are called "cord-blood-derived embryonic-like stem cells" or CBEs.
British scientists have progressed from discovering the cells, extracting 10,000 of them, using a micro-bioreactor to generate millions more, and creating liver tissue with them. They are working to reproduce nerve tissue.