Stem cells have been heralded as the gateway to 21 st Century medicine.

We are told that one of the most exciting possibilities in human therapeutics is that stem cells – embryonic or adult – may compensate for cell loss in disease and bring functional recovery

What are stem cells? Put simply, stem cells are the bodys master cells that can develop into other cells and tissues. They are immature cells that still have the potential to develop into many different kinds of cells, i.e. they are. Put simply, stem cells are the bodys master cells that can develop into other cells and tissues. They are immature cells that still have the potential to develop into many different kinds of cells, i.e. they are pluripotent.

What are stem cells? Unlike specialised cells, they have the capacity to proliferate – keep on multiplying. This makes them ideal for replacing cells lost or damaged by disease. Unlike specialised cells, they have the capacity to proliferate – keep on multiplying. This makes them ideal for replacing cells lost or damaged by disease.

It is understandable that research scientists, biotech companies and sick people are so passionate about having the freedom to develop them. It is understandable that research scientists, biotech companies and sick people are so passionate about having the freedom to develop them.

Source of stem cells Stem cells can be derived from both embryonic and non embryonic (adult) sources. Stem cells can be derived from both embryonic and non embryonic (adult) sources.

Source of stem cells Embryonic Stem Cells are currently obtained from surplus 5-7 day old embryos. It is argued that researchers could achieve their ends in this way without resorting to cloning techniques

Source of stem cells However others believe that cloning by Somatic Cell Nuclear Transfer (SCNT) technology could produce embryonic cells that would eliminate rejection, since it would produce tissue perfectly matched to the patient.

Cloning technology In somatic cell nuclear transplant the nucleus from a cell in the persons body (somatic cell) is removed and inserted into a donated ovum from which the nucleus has been removed.

Cloning technology The cell is stimulated with a short electrical pulse, and then develops into the blastocyst (early embryo) from which the stem cells can be removed.

Cloning technology This process has been called therapeutic cloning though as yet these cells have never been used for therapy on human beings. They are identical with those of the donor of the somatic cell.

Cloning technology If the embryo was allowed to develop and was implanted in a uterus it would be an exact genetic copy of the individual who donated the the cell. This would be reproductive cloning.

Cloning technology

Reproductive cloning Reproductive cloning Dolly the sheep was produced in this way.

Non embryonic stem cells Adult stem cells It was once though that adult stem cells were only capable of making cells for one particular tissue, but it has been discovered recently that non embryonic sources for stem cells such as the tissue of adults or cord blood can also be pluripotent, i.e. have the capacity to differentiate into a variety of specialised cells.

Non embryonic stem cells They are already being used therapeutically.

Non embryonic stem cells They are already being used therapeutically.

Proponents say that stem cells will revolutionise medicine. Others say there are serious ethical concerns in the technology used to create them.

Introducing...

The Cloning Wars The Cloning Wars An NCF Hypothetical An NCF Hypothetical

The Cloning Wars The Cloning Wars An NCF Hypothetical An NCF Hypothetical

Panel members played by: Panel members played by: Dr Sally Candlin Dr Sally Candlin Karys Fearon Karys Fearon Diana Marshall Diana Marshall Jane Cooper Jane Cooper Wayne Marshall Wayne Marshall Rev. George Robinson Rev. George Robinson