New gene-editing technique: faster, cheaper, more-precise (and no need for a virus)
 

The article doesn't mention Parkinson's disease, but the applicability of this new technique seems widespread (IMHO).

T cell engineering breakthrough sidesteps need for viruses in gene-editing: With faster, cheaper, more precise technique, authors say it's 'off to the races' toward new cell therapies -- ScienceDaily

Thanks jeffreyn.

CRISPR/Cas9 is a great discovery.

I suspect that it will be helpful for treatment of anything which has an immune system involvement and that may well be just the start.