Experts in the field of regenerative medicine believe one of the first areas of success when using stem cell-derived therapies will be the treatment of macular degeneration, which causes progressive loss of sight, and other retinal diseases. Click through the gallery to learn more about stem cell research.
In January 2014, researchers announced they had developed a new method of making stem cells: by placing skin cells in an acidic environment. But the researchers retracted their papers in July, citing "several critical errors" in their study data.
Stem cells have the potential to become many kinds of cells and can renew themselves through cell division. Scientists view stem cells as a possible gateway to curing many medical conditions, from Parkinson's disease to diabetes. Stem cells are viewed on computer here at UConn Health Center in 2010.
A closeup of a microscope slide taken in 2000 at the Reproductive Genetics Institute's Chicago laboratory shows transplanted stem cells taken from the umbilical cord blood of a baby named Adam Nash. Adam's sister Molly has a genetic disease called Fanconi anemia. Their parents wanted to have a child who could be a stem cell donor for Molly. Using in vitro fertilization, doctors created embryos and then tested them for the genetic disease. They chose one that did not have the disorder, which grew into baby Adam. Molly received a stem cell transplant from stem cells from Adam's umbilical cord. Both children are alive today.
In 1998, President Bill Clinton requested a National Bioethics Advisory Commission to study the question of stem cell research.
In 2000, the National Institutes of Health issued guidelines for the use of embryonic stem cells in research, specifying that scientists receiving federal funds could use only extra embryos that would otherwise be discarded. President Clinton approved federal funding for stem cell research, but Congress did not fund it. Above, a Cell Expansion System, which is used to grow cells, is seen during the 2010 World Stem Cell Summit in Detroit.
In August 2001, President George W. Bush announced that he would allow federal funding for about 60 existing stem cell lines created before this date. Above, a human stem cell colony, which is no more than 1 millimeter wide and comprises thousands of individual stem cells, grows on mouse embryonic fibroblast in a research laboratory in September 2001.
In 2005, Connecticut and Illinois designated state funds to support stem cell research in their states. Above, a woman works on stem cells at the University of Connecticut's Stem Cell Institute at the UConn Health Center in August 2010 in Farmington.
In March 2009, President Barack Obama signed an executive order that removed restrictions on embryonic stem cell research. His action overturned an order approved by President George W. Bush in August 2001 that barred the National Institutes of Health from funding research on embryonic stem cells beyond using 60 cell lines that existed at that time.