Someone else may be able to answer more clearly, but what I understand it to be saying is that rather than being stuck on symptom relief treatments, new treatments are being worked on that protect the dopaminergic neurons and prevent their death.

These methods include anti-oxidant, anti-apoptosis and anti-inflammatory treatments as well as gene therapy to turn off the disease process.

I guess what they're saying is that rather than focusing on symptom treatment, some real, promising steps have been made to alter the disease course itself.