For anyone who liked the NeuroscienceNews article, but found the research paper(s) a bit heavy going, there is another article about the Sulzer et al. paper, on the AlzForum website.

It's a slightly longer article, which goes substantially beyond the Columbia University press release, and also includes a significant comment from a couple of independent academics:

Trigger Warning: α-Synuclein Sets Off T Cells in Parkinson’s | ALZFORUM