Caution urged as scientists look to create human-monkey chimeras
The monkeys in Douglas Munoz’s Kingston lab look like other monkeys.
They socialize and move around and eat and drink in the same way. They don’t fall over or stagger around. In fact, the only thing separating the macaques from their unaltered lab mates is the elevated level of a specific human protein implanted inside their brains — proteins that accumulate in the brains of humans with Alzheimer’s disease.
The monkeys have been injected with beta-amyloid, a molecule that, in high-enough amounts, is toxic to human brain tissue....