J Eur Acad Dermatol Venereol. 2022 Jul 23. doi: 10.1111/jdv.18459. Online ahead of print.
BACKGROUND: Epidemiological studies have suggested psoriasis was associated with an increased risk of Parkinson’s disease (PD). However, whether psoriasis has an effect on PD progression is not explored yet.
OBJECTIVES: To evaluate the causal role of psoriasis in PD progression.
METHODS: We conducted a two-sample Mendelian randomization analysis using summary statistics from genome-wide association study of psoriasis (N=33,394), age at onset (N=28,568) and progression (N=4,093) of PD.
RESULTS: One standard deviation increase in genetically determined psoriasis risk was significantly associated with faster progression to dementia (OR=1.07, 95 % CI: 0.1.03~1.1, P=4.71E-04). Meanwhile, higher psoriasis risk was nominally associated with faster progression of PD measured by time to Hoehn and Yahr stage 3 (OR=1.05, 95 % CI: 1.02~1.08, P=1.53E-03) and depression (OR=1.06, 95 % CI: 1.02~1.11, P=1.77E-03) of PD. The results were robust under all sensitivity analyses.
CONCLUSIONS: These results suggested psoriasis accelerated overall progression of PD, and increased risk of dementia and depression of PD. A deeper understanding of neuroinflammation and immune response is likely to elucidate the potential pathogenesis of PD progression and identify novel therapeutic targets.