As noted above, a human clinical trial (Phase I) of PBT434 is planned to commence later this year (focused on motor symptoms).

For those who would like some background information on PBT434, but don't have the time (or inclination) to read the research paper, the SoPD blog has a pretty-good write-up (IMHO):

Iron, life force, and Parkinson’s disease | The Science of Parkinson's disease