|id||Stem Cells: quick ideas about Stem Cells. What are they? Where do you get them from? Medical use. Ethical issues. Therapeutical Cloning.|
|células madre células mãe(por) cellules souches(fr)|
1. What are Stem Cells? They are cells that are pluripotential or multipotential. This means that they can be the origin of a variety of tissues (muscles, nerves, osseous, etc.). Totipotential stem cells can generate a complete living being, these on the other hand, are only a portion. For example, in the healing of a wound, there is a generation of new tissues where these cells intervene.
2. Where can we find Stem Cells? We can sum-up these places in three groups:
3. What utility can we get from Stem Cells? The objective is to get these cells to create tissues that can replace injuries due to different illnesses (Parkinson’s, Alzheimer, sclerosis…). The benefit is that if they come from the same patient they would not face rejection.
4. Has anything been achieved? There have been several successful interventions on patients with Adult Stem Cells. On the other hand, embryonic stem cells have led to problems such as tumours or cancer as they tend to generate various tissues, whilst adult ones, after inducing them, they are limited to reproduce the tissues which were planned. Due to this, the correct line of investigation should be in Adult Stem Cells. On the other hand, embryonic stem cells present serious ethical problems.
5. What ethical problems? There are several cases: