Parkinson's disease is associated with high CSF concentration of mitochondrial DNA in LRRK2G2019S mutation carriers.
The concentration of mitochondrial DNA in CSF differentiates idiopathic from LRRK2-related Parkinson's disease.
Idiopathic, but not LRRK2-related, Parkinson's disease is associated with low CSF concentration of α-synuclein.