LONDON -- British scientists say they have created human embryos containing DNA from two women and a man in a procedure that researchers hope might be used one day to produce embryos free of inherited diseases.
Though the preliminary research has raised concerns about the possibility of genetically modified babies, the scientists say that the embryos are still only primarily the product of one man and one woman.
"We are not trying to alter genes, we're just trying to swap a small proportion of the bad ones for some good ones," said Patrick Chinnery, a professor of neurogenetics at Newcastle University involved in the research.
The research was presented at a scientific conference recently, but has not been published in a scientific journal.
The process aims to create healthy embryos for couples to avoid passing on genes carrying diseases.
The genes being replaced are the mitochondria, a cell's energy source, which are contained outside the nucleus in a normal female egg. Mistakes in the mitochondria's genetic code can result in serious diseases like muscular dystrophy, epilepsy, strokes and mental retardation.
In their research, Chinnery and colleagues used normal embryos created from one man and one woman that had defective mitochondria in the woman's egg. They then transplanted that embryo into an emptied egg donated from a second woman who had healthy mitochondria.
...So far, 10 such embryos have been created, though they have not been allowed to develop for more than five days. Chinnery hoped that after further experiments in the next few years the process might be available to parents undergoing in-vitro fertilization.
These embryos "have not been allowed to develop for more than five days."
Researchers kill the living embryos.
This isn't a medical breakthrough. It's an assault on life.
Where are theIt's unethical to use human life as raw material for experimentation.
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