RT Journal Article T1 Circulating Fetuin-A and Risk of Type 2 Diabetes: A Mendelian Randomization Analysis. A1 Kröger, Janine A1 Meidtner, Karina A1 Stefan, Norbert A1 Guevara, Marcela A1 Kerrison, Nicola D A1 Ardanaz, Eva A1 Aune, Dagfinn A1 Boeing, Heiner A1 Dorronsoro, Miren A1 Dow, Courtney A1 Fagherazzi, Guy A1 Franks, Paul W A1 Freisling, Heinz A1 Gunter, Marc J A1 Huerta, José María A1 Kaaks, Rudolf A1 Key, Timothy J A1 Khaw, Kay Tee A1 Krogh, Vittorio A1 Kühn, Tilman A1 Mancini, Francesca Romana A1 Mattiello, Amalia A1 Nilsson, Peter M A1 Olsen, Anja A1 Overvad, Kim A1 Palli, Domenico A1 Quirós, J Ramón A1 Rolandsson, Olov A1 Sacerdote, Carlotta A1 Sala, Núria A1 Salamanca-Fernández, Elena A1 Sluijs, Ivonne A1 Spijkerman, Annemieke M W A1 Tjonneland, Anne A1 Tsilidis, Konstantinos K A1 Tumino, Rosario A1 van der Schouw, Yvonne T A1 Forouhi, Nita G A1 Sharp, Stephen J A1 Langenberg, Claudia A1 Riboli, Elio A1 Schulze, Matthias B A1 Wareham, Nicholas J AB Fetuin-A, a hepatic-origin protein, is strongly positively associated with risk of type 2 diabetes in human observational studies, but it is unknown whether this association is causal. We aimed to study the potential causal relation of circulating fetuin-A to risk of type 2 diabetes in a Mendelian randomization study with single nucleotide polymorphisms located in the fetuin-A-encoding AHSG gene. We used data from eight European countries of the European Prospective Investigation into Cancer and Nutrition (EPIC)-InterAct case-cohort study including 10,020 incident cases. Plasma fetuin-A concentration was measured in a subset of 965 subcohort participants and 654 case subjects. A genetic score of the AHSG single nucleotide polymorphisms was strongly associated with fetuin-A (28% explained variation). Using the genetic score as instrumental variable of fetuin-A, we observed no significant association of a 50 µg/mL higher fetuin-A concentration with diabetes risk (hazard ratio 1.02 [95% CI 0.97, 1.07]). Combining our results with those from the DIAbetes Genetics Replication And Meta-analysis (DIAGRAM) consortium (12,171 case subjects) also did not suggest a clear significant relation of fetuin-A with diabetes risk. In conclusion, although there is mechanistic evidence for an effect of fetuin-A on insulin sensitivity and secretion, this study does not support a strong, relevant relationship between circulating fetuin-A and diabetes risk in the general population. YR 2018 FD 2018-03-09 LK http://hdl.handle.net/10668/12223 UL http://hdl.handle.net/10668/12223 LA en DS RISalud RD Apr 12, 2025