RT Journal Article T1 Genome-Wide Association Study of Metamizole-Induced Agranulocytosis in European Populations. A1 Cismaru, Anca Liliana A1 Rudin, Deborah A1 Ibañez, Luisa A1 Liakoni, Evangelia A1 Bonadies, Nicolas A1 Kreutz, Reinhold A1 Carvajal, Alfonso A1 Lucena, Maria Isabel A1 Martin, Javier A1 Sancho Ponce, Esther A1 Molokhia, Mariam A1 Eriksson, Niclas A1 Krähenbühl, Stephan A1 Largiadèr, Carlo R A1 Haschke, Manuel A1 Hallberg, Pär A1 Wadelius, Mia A1 Amstutz, Ursula K1 dipyrone K1 drug-induced agranulocytosis K1 genome-wide association study K1 metamizole K1 pharmacogenetics AB Agranulocytosis is a rare yet severe idiosyncratic adverse drug reaction to metamizole, an analgesic widely used in countries such as Switzerland and Germany. Notably, an underlying mechanism has not yet been fully elucidated and no predictive factors are known to identify at-risk patients. With the aim to identify genetic susceptibility variants to metamizole-induced agranulocytosis (MIA) and neutropenia (MIN), we conducted a retrospective multi-center collaboration including cases and controls from three European populations. Association analyses were performed using genome-wide genotyping data from a Swiss cohort (45 cases, 191 controls) followed by replication in two independent European cohorts (41 cases, 273 controls) and a joint discovery meta-analysis. No genome-wide significant associations (p < 1 × 10-7) were observed in the Swiss cohort or in the joint meta-analysis, and no candidate genes suggesting an immune-mediated mechanism were identified. In the joint meta-analysis of MIA cases across all cohorts, two candidate loci on chromosome 9 were identified, rs55898176 (OR = 4.01, 95%CI: 2.41-6.68, p = 1.01 × 10-7) and rs4427239 (OR = 5.47, 95%CI: 2.81-10.65, p = 5.75 × 10-7), of which the latter is located in the SVEP1 gene previously implicated in hematopoiesis. This first genome-wide association study for MIA identified suggestive associations with biological plausibility that may be used as a stepping-stone for post-GWAS analyses to gain further insight into the mechanism underlying MIA. PB MDPI AG YR 2020 FD 2020-10-29 LK http://hdl.handle.net/10668/16529 UL http://hdl.handle.net/10668/16529 LA en NO Cismaru AL, Rudin D, Ibañez L, Liakoni E, Bonadies N, Kreutz R, et al. Genome-Wide Association Study of Metamizole-Induced Agranulocytosis in European Populations. Genes (Basel). 2020 Oct 29;11(11):1275. DS RISalud RD Oct 25, 2025