Hi Rick,
Well spotted. I had not seen this one, even though I have Google alerts on the BBB.
I have been in touch with other PD organisations on my "Role of the BBB in PD" paper, which I posted in 2006 here when Neurotalk began. I had posted earlier on the old Braintalk, but can't access those posts now.
What I would like to see is a measurement of the BBB permeability of PWP at various stages in PD, 1 year, 5 years 10 years etc. compared with healthy people. It can be done, I corresponded with a BBB expert who confirmed you can measure the permeability of living people. You could then try various drugs and supplements and observe the effect on BBB permeability. It would also be possible to find the value for the threshold permeability, above which you show PD symptoms.
Will we live to see it?? I am 73 now!!!
Ron