Quote:
Originally Posted by redambition
i want to know what they want to use these embryos for.
is it for testing new medical theories? looking for ways to cure illness through genetics? from what frocher has posted it doesn't sound like they want to create a human/animal hybrid. they want to create an embryo they can use in the lab.
it does sound odd and a bit unnecessary, but what are the alternatives for doctors and scientists to get embryos for research purposes? from what i know, there's very little out there.
i don't think i agree with what they are doing, but i'd like to know more about why they are creating these hybrid embryos before i make my judgement.
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Finally a reasonable response! I totally applaud you. I looked for some answers for you:
Possible types of animal/human hybrid embryos
- Cytoplasmic hybrid embryos: embryos created through cell nuclear replacement using animal eggs
- Hybrid embryos: embryos created by mixing human sperm and animal eggs or human eggs and animal sperm
- Human chimera embryos: human embryos which have animal cells added to them during early development
- Animal chimera embryos: animal embryos which have human cells added to them during early development
- Transgenic human embryos: human embryos which have animal genes inserted into them during early development
Source: Human Fertilisation and Embryology Authority
Uses of the embryos
Researchers say the work is needed to advance the understanding of complex diseases such as Parkinson's, Alzheimer's and Motor Neurone Disease.
Why use animal eggs?
The creation of hybrid human-animal embryos was first suggested as a way of addressing the shortage of human eggs available for research.
Also, experts say using human-animal mixes rather than human eggs to get the stem cells makes sense because the process is less cumbersome and yields better results.
How could this help find disease cures?
Scientists say they can use embryonic stem cells to study different disease processes.
For example, they could take genetic material from a person with Parkinson's disease and put it into an empty animal egg to make stem cells that will carry the same genetic defects that cause Parkinson's.
Stem cells also have the potential to grow into different tissues, so in the future it might be possible to transplant cells cloned from individual patients to cure diseases.
What are the concerns about the work?
Opponents say this is tampering with nature and is unethical.
Critics say they are repulsed by the idea and there must be no creation of an animal-human hybrid.
It is already illegal to implant human-animal embryos in the womb or bring them to term.
One of the scientists applying to do hybrid work, Professor Chris Shaw from Kings College London, stressed: "We think there is nothing illegal, immoral or unethical about this.
"While we understand the concerns, we think they are largely founded on misinformation.
"People think we are generating some sort of hybrid animal. This is just cells, just for science. No animal is ever going to be created."
From here: BBC NEWS | Health | Q&A: Hybrid embryos