Caution urged as scientists look to create human-monkey chimeras
The monkeys in Douglas Munozâ€™s Kingston lab look like other monkeys.
They socialize and move around and eat and drink in the same way. They donâ€™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 â€” proteins that accumulate in the brains of humans with Alzheimerâ€™s disease.
The monkeys have been injected with beta-amyloid, a molecule that, in high-enough amounts, is toxic to human brain tissue....