Scientists from the V.I. Ernst, Skolkovo Institute of Science and Technology, Moscow State University and other organizations have successfully cloned a cow in Russia using the CRISPR / Cas9 genomic editor.
Previously, the authors of the work have already removed the proteins that cause lactose intolerance: they turned off the PAEP and LOC100848610 genes, which produce beta-lactoglobulin.
They created a new breed whose milk will be hypoallergenic for people with lactose intolerance.
A cloned heifer weighing 63 kg was born on April 10, 2020. Now, over a year old, it is already an adult weighing 410 kg with a regular reproductive cycle. The first year we kept her with her mother in a separate room, but in May she was transferred to daily grazing along with the rest of the cows of the institute.
Galina Singina, head of the laboratory of the V.N. Ernst
Now scientists are planning to start modifying the DNA of donor cells, and are also raising a herd of dozens of cows that will carry genetically modified calves.