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Date: Mon, 19 Jan 1998 21:29:48 -0800
From: Andrew Gach <UncleWolf@worldnet.att.net>
To: ar-news@envirolink.org
Subject: Genes from sheep, pigs and other species placed in cow eggs
Message-ID: <34C4364C.D39@worldnet.att.net>
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Cow eggs can develop for a while with genes from other species
The Associated Press
NEW YORK, January 19, 1998
Scientists have put genes from adult sheep, pigs and other species into
cow eggs and the eggs have grown into early embryos.
If the technique can be improved, it might help scientists produce
genetically altered animal organs for transplanting into people, said
researcher Neal L. First of the University of Wisconsin-Madison.
Scientists might be able to produce organs rather than whole animals
from the transformed eggs, he said.
The work is to be reported Monday in Boston at a meeting of the
International Embryo Transfer Society.
Researchers replaced the cow genes in the eggs with sheep, pig, rat or
monkey genes, taken from the ear cells of adult animals. Eggs then
developed according to the timetable of whatever species donated the
genes, First said.
At least some of the inserted genes were apparently reprogrammed by the
eggs to promote early development of the species they came from, First
said.
Some embryos were put into females of the appropriate species for
further development, but the pregnancies ended in miscarriage early on,
First said.
"We have lots of things to learn if we are going to make it go to
completion," First said in a telephone interview. He said it's not clear