Thanks for that. I read something about this during the time when there was a big flap about whether Alzheimers and similar brain diseases could be caused by "prions".
Proponents of the prion theory were able to induce Alzheimers-like symptoms in lab rats by injecting them with extracts from the brains of animals already affected that contained prions. But the complaint arose that there might have been some additional causative agent contained in these extracts.
I would take seriously this new research if they were able to induce the Alzheimers-like symptoms by using pure beta-amyloids created in the lab that didn't also have to be taken from already affected animals.

Bob Clark