Mutations in LRRK2 are a common cause of familial and sporadic Parkinson’s. Though clinical features resemble typical PD, about half of cases lack Lewy pathology. Doctors Hiroaki Sekiya and Nanna Møller Jensen discuss their recent studies on the neuropathology of LRRK2-PD patients. They dive into their methods and how proximity ligation assays may compare to alpha-synuclein seeding assays in identification of alpha-synuclein oligomers. Together they explain their surprising results on how alpha-synuclein oligomers may be a key early feature in LRRK2-PD.

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