|A third and novel approach has been proposed and is generally referred to as therapeutic cloning, though the use of this term is regretted by many of the scientists working in the area. These would be the steps in therapeutic cloning: |
Step1: the patient needing a transplant would have one of their diploid cells removed this could simply be a cell from the base of a hair or any other suitable tissue.
At the same time, an egg cell would be prepared by having its haploid nucleus removed.
Step 2: The patient cell, or its nucleus, would then be fused with the 'empty' egg cell. The result would be a diploid cell rather like a zygote.
Step 3: This cell would then be stimulated to divide by mitosis in the same way as the cell that gave rise to Dolly the cloned sheep was. If all went to plan, after about five days a blastocyst would develop.
Step 4: Stem cells could then be isolated from the blastocyst and encouraged to develop into specific tissue types.
Step 5: These tissues could be used to transplant back into the patient.