(Crazy?) Engineered solution to reduce craziness?

A study into the treatment of Parkinson’s disease has achieved a degree of success thanks to an engineered solution that delivered a therapeutic protein to participants’ brains.

https://www.theengineer.co.uk/parkinsons-disease-gdnf/?cmpid=tenews_7552270&utm_medium=email&utm_source=newsletter&utm_campaign=tenews&adg=B9661AD2-80C4-45E6-885B-771A5905C40A