However, there is much not yet known about all stem cells types and how they work. Much more research is needed to safely and effectively use of these in people with other diseases. There are a number of areas of active research going on. One example is the research  onto finding a way to stimulate organ-specific stem cells  in the body to repair diseased tissue. Another area of research involves isolating stem cells and stimulating them in the laboratory to become specialized cells for use in transplantation.