There may be an unexpected fix for ongoing shortages of insulin: A brown bovine in Brazil recently made history as the first transgenic cow able to produce human insulin in her milk.
as a factory to make protein really, really efficiently," explained study leader Matt Wheeler, a professor of animal sciences at the University of Illinois Urbana-Champaign. "We can take advantage of that system to produce a protein that can help hundreds of millions of people worldwide."
The altered embryos were then implanted in the uteri of normal cows in Brazil, and one transgenic calf was born. to try to impregnate her. When that failed, they used hormones to stimulate her to produce milk for the first time. would have produced, the milk not only had detectable levels of human proinsulin but also insulin itself. Researchers didn't expect that.
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