i found this 2009 article quite interesting, not least for showing that much of the recent 'news' has been suspected for several yearshttp://www.pnas.org/content/106/31/12571.full
it compares a-sync with prions.
Bet you didnt know there was mad ostrich disease?
it wuld be intersting if a-sync directly corrupted good a-sync - the recent article didnt say how the infection spread just that it did.
ps there are big holes in the bbb particularly in the nasal area.