Is Parkinson's an autoimmune disease?

The cause of neuronal death in Parkinson's disease is still unknown, but
a new study proposes that neurons may be mistaken for foreign invaders
and killed by the person's own immune system, similar to the way
autoimmune diseases like type I diabetes, celiac disease, and multiple
sclerosis attack the body's cells. The study was published April 16,
2014, in Nature Communications.

MHC-I expression renders catecholaminergic neurons susceptible to T-cell-mediated degeneration.