The number one issue to resolve for the future of stem cell research is the argument on the ethics of using embryonic stem cells. Once this is settled, if the treatment is accepted, then the research can really take off. Being worked on right now, is the ability to create large quantities of stem cells at one time. As of now, stem cells are made in small amounts. Scientists are trying to perfect the way stem cells are injected into the body. The way of injection is a gamble right now. The doctor's insert the stem cells as close as possible to the in-need organ or tissue and hope they reach the correct one. The new method will be called "Targeted Delivery." This technique guarantees that the stem cells will arrive at the correct destination. "Scientists will be trying to identify the particular molecular signals that affect stem cells. Molecular signals are chemicals in whose presence cells act in a certain fashion. Molecular signals released by surrounding tissues either tell stem cells to remain stem cells or they tell stem cells to differentiate into their specialized successors. Once we know what the various molecular signals are, we can manipulate stem cells, either by maintaining them as stem cells or by encouraging them to differentiate, depending on how we plan to use them." |