The association between circulating 25-hydroxyvitamin D metabolites and type 2 diabetes in European populations: A meta-analysis and Mendelian randomisation analysis

Ju-Sheng Zheng, Jian’an Luan, Eleni Sofianopoulou, Stephen J Sharp, Felix R Day, Fumiaki Imamura, Thomas E Gundersen, Luca A Lotta, Ivonne Sluijs, Isobel D Stewart, Rupal L Shah, Yvonne T van der Schouw, Eleanor Wheeler, Eva Ardanaz, Heiner Boeing, Miren Dorronsoro, Christina C Dahm, Niki Dimou, Douae El-Fatouhi, Paul W Franks, Guy Fagherazzi, Sara Grioni, José María Huerta, Alicia K Heath, Louise Hansen, Mazda Jenab, Paula Jakszyn, Rudolf Kaaks, Tilman Kühn, Kay-Tee Khaw, Nasser Laouali, Giovanna Masala, Peter M Nilsson, Kim Overvad, Anja Olsen, Salvatore Panico, J Ramón Quirós, Olov Rolandsson, Miguel Rodríguez-Barranco, Carlotta Sacerdote, Annemieke M W Spijkerman, Tammy Y N Tong, Rosario Tumino, Konstantinos K Tsilidis, John Danesh, Elio Riboli, Adam S Butterworth, Claudia Langenberg, Nita G Forouhi and Nicholas J Wareham

PLOS Medicine, 2020, vol. 17, issue 10, 1-21

Abstract: Background: Prior research suggested a differential association of 25-hydroxyvitamin D (25(OH)D) metabolites with type 2 diabetes (T2D), with total 25(OH)D and 25(OH)D3 inversely associated with T2D, but the epimeric form (C3-epi-25(OH)D3) positively associated with T2D. Whether or not these observational associations are causal remains uncertain. We aimed to examine the potential causality of these associations using Mendelian randomisation (MR) analysis. Methods and findings: We performed a meta-analysis of genome-wide association studies for total 25(OH)D (N = 120,618), 25(OH)D3 (N = 40,562), and C3-epi-25(OH)D3 (N = 40,562) in participants of European descent (European Prospective Investigation into Cancer and Nutrition [EPIC]–InterAct study, EPIC-Norfolk study, EPIC-CVD study, Ely study, and the SUNLIGHT consortium). We identified genetic variants for MR analysis to investigate the causal association of the 25(OH)D metabolites with T2D (including 80,983 T2D cases and 842,909 non-cases). We also estimated the observational association of 25(OH)D metabolites with T2D by performing random effects meta-analysis of results from previous studies and results from the EPIC-InterAct study. We identified 10 genetic loci associated with total 25(OH)D, 7 loci associated with 25(OH)D3 and 3 loci associated with C3-epi-25(OH)D3. Based on the meta-analysis of observational studies, each 1–standard deviation (SD) higher level of 25(OH)D was associated with a 20% lower risk of T2D (relative risk [RR]: 0.80; 95% CI 0.77, 0.84; p

Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pmed00:1003394

DOI: 10.1371/journal.pmed.1003394

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