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The Interaction between HLA‐DRB1 and Smoking in Parkinson's Disease Revisited
Journal article   Peer reviewed

The Interaction between HLA‐DRB1 and Smoking in Parkinson's Disease Revisited

C. Domenighetti, V. Douillard, P‐E Sugier, A.A.K. Sreelatha, C. Schulte, S. Grover, P. May, D.R. Bobbili, M. Radivojkov‐Blagojevic, P. Lichtner, …
Movement Disorders, Vol.37(9), pp.1929-1937
2022
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Abstract

Background Two studies that examined the interaction between HLA-DRB1 and smoking in Parkinson's disease (PD) yielded findings in opposite directions. Objective To perform a large-scale independent replication of the HLA-DRB1 × smoking interaction. Methods We genotyped 182 single nucleotide polymorphism (SNPs) associated with smoking initiation in 12 424 cases and 9480 controls to perform a Mendelian randomization (MR) analysis in strata defined by HLA-DRB1. Results At the amino acid level, a valine at position 11 (V11) in HLA-DRB1 displayed the strongest association with PD. MR showed an inverse association between genetically predicted smoking initiation and PD only in absence of V11 (odds ratio, 0.74, 95% confidence interval, 0.59–0.93, PInteraction = 0.028). In silico predictions of the influence of V11 and smoking-induced modifications of α-synuclein on binding affinity showed findings consistent with this interaction pattern. Conclusions Despite being one of the most robust findings in PD research, the mechanisms underlying the inverse association between smoking and PD remain unknown. Our findings may help better understand this association.

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Collaboration types
Domestic collaboration
International collaboration
Citation topics
1 Clinical & Life Sciences
1.52 Neurodegenerative Diseases
1.52.67 Parkinson's Disease
Web Of Science research areas
Clinical Neurology
ESI research areas
Neuroscience & Behavior
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