Dairy Intake and Parkinson's Disease: A Mendelian Randomization Study. Issue 4 (8th January 2022)

• Record Type: Journal Article
• Authors: Domenighetti, Cloé; Sugier, Pierre‐Emmanuel; Ashok Kumar Sreelatha, Ashwin; Schulte, Claudia; Grover, Sandeep; Mohamed, Océane; Portugal, Berta; May, Patrick; Bobbili, Dheeraj R.; Radivojkov‐Blagojevic, Milena; Lichtner, Peter; Singleton, Andrew B.; Hernandez, Dena G.; Edsall, Connor; Mellick, George D.; Zimprich, Alexander; Pirker, Walter; Rogaeva, Ekaterina; Lang, Anthony E.; Koks, Sulev; Taba, Pille; Lesage, Suzanne; Brice, Alexis; Corvol, Jean‐Christophe; Chartier‐Harlin, Marie‐Christine; Mutez, Eugénie; Brockmann, Kathrin; Deutschländer, Angela B.; Hadjigeorgiou, Georges M.; Dardiotis, Efthimos; Stefanis, Leonidas; Simitsi, Athina Maria; Valente, Enza Maria; Petrucci, Simona; Duga, Stefano; Straniero, Letizia; Zecchinelli, Anna; Pezzoli, Gianni; Brighina, Laura; Ferrarese, Carlo; Annesi, Grazia; Quattrone, Andrea; Gagliardi, Monica; Matsuo, Hirotaka; Kawamura, Yusuke; Hattori, Nobutaka; Nishioka, Kenya; Chung, Sun Ju; Kim, Yun Joong; Kolber, Pierre; van de Warrenburg, Bart P.C.; Bloem, Bastiaan R.; Aasly, Jan; Toft, Mathias; Pihlstrøm, Lasse; Correia Guedes, Leonor; Ferreira, Joaquim J.; Bardien, Soraya; Carr, Jonathan; Tolosa, Eduardo; Ezquerra, Mario; Pastor, Pau; Diez‐Fairen, Monica; Wirdefeldt, Karin; Pedersen, Nancy L.; Ran, Caroline; Belin, Andrea C.; Puschmann, Andreas; Hellberg, Clara; Clarke, Carl E.; Morrison, Karen E.; Tan, Manuela; Krainc, Dimitri; Burbulla, Lena F.; Farrer, Matt J.; Krüger, Rejko; Gasser, Thomas; Sharma, Manu; Elbaz, Alexis;
• Is Part Of: Movement disorders. Volume 37:Issue 4(2022)
• Page Start: 857
• Page End: 864
• Publication Date: 2022-01-08
• Subjects: dairy intake; Parkinson's disease; Mendelian randomization; Movement disorders -- Periodicals; 610
• DOI: 10.1002/mds.28902
• Languages: English
• ISSNs: 0885-3185

Abstract

Abstract: Background: Previous prospective studies highlighted dairy intake as a risk factor for Parkinson's disease (PD), particularly in men. It is unclear whether this association is causal or explained by reverse causation or confounding. Objective: The aim is to examine the association between genetically predicted dairy intake and PD using two‐sample Mendelian randomization (MR). Methods: We genotyped a well‐established instrumental variable for dairy intake located in the lactase gene (rs4988235) within the Courage‐PD consortium (23 studies; 9823 patients and 8376 controls of European ancestry). Results: Based on a dominant model, there was an association between genetic predisposition toward higher dairy intake and PD (odds ratio [OR] per one serving per day = 1.70, 95% confidence interval = 1.12–2.60, P = 0.013) that was restricted to men (OR = 2.50 [1.37–4.56], P = 0.003; P ‐difference with women = 0.029). Conclusions: Using MR, our findings provide further support for a causal relationship between dairy intake and higher PD risk, not biased by confounding or reverse causation. Further studies are needed to elucidate the underlying mechanisms. © 2022 International Parkinson and Movement Disorder Society