Experts of the company AgResearch brought in collaboration with researchers from the University of Waikato in New Zealand breed of genetically modified cows that give milk, which does not cause allergic reactions in children, according to the BBC BBC.
According to information professionals from cows’ milk allergy affects up to 3% of children in the first years of life. This reaction is known to provoke a protein contained in the whey, - beta-lactoglobulin. It is absent in human milk, but is contained in the cow.
"Beta-lactoglobulin, which is in cow’s milk in infants causes severe allergic reactions," - experts say. They explain that the instruction to develop this protein is contained in the DNA of a cow. Studies using the RNAi researchers have added to it additional genetic material to destroy the process of protein production in animals. As a result, the calf was born without a tail. However, the researchers claim that it has no relation to genetic modifications.
In order to stimulate the production of milk, which is considered quite safe, scientists have used hormones. "Milk obtained from a genetically modified cow does not contain beta-lactoglobulin" - reported by the authors. They concluded that the method of RNA interference characteristic of high efficiency.
Keith Campbell, a professor at the University of Nottingham, said that scientists must now make sure to continue to genetic modification of cows during the rest of their lives, handed down from generation to generation. "We have seen the first example of the successful use of RNA interference in animals, as previously technique widely used only in experiments with plants," - said Bruce Whitelaw from the University of Edinburgh.