Are there any alternatives to using embryonic stem cells?
Another option for creating embryonic-like stem cells without using human eggs is deprogramming normal cells to become pluripotent cells (known as induced pluripotent stem cells, or iPS cells). This innovative procedure has problematic aspects, though. To deprogram the cells, genes are introduced into the cells by way of a virus, which may cause adverse effects. Additionally, one of the genes necessary for the process contributes to cancer. However, research is currently being conducted to find alternative methods of “turning on” the genes, such as using chemicals instead of viruses. If scientists can resolves these issues, pluripotent stem cells would be a valuable source for cell therapies because donor stem cells could be reconfigured to be genetically identical to the recipient’s cells, and the issue of immune rejection would be eliminated.
