RT Journal Article T1 Association of Rare APOE Missense Variants V236E and R251G With Risk of Alzheimer Disease. A1 Le-Guen, Yann A1 Belloy, Michael E A1 Grenier-Boley, Benjamin A1 de-Rojas, Itziar A1 Castillo-Morales, Atahualpa A1 Jansen, Iris A1 Nicolas, Aude A1 Bellenguez, Céline A1 Dalmasso, Carolina A1 Küçükali, Fahri A1 Eger, Sarah J A1 Rasmussen, Katrine Laura A1 Thomassen, Jesper Qvist A1 Deleuze, Jean-François A1 He, Zihuai A1 Napolioni, Valerio A1 Amouyel, Philippe A1 Jessen, Frank A1 Kehoe, Patrick G A1 van Duijn, Cornelia A1 Tsolaki, Magda A1 Sanchez-Juan, Pascual A1 Sleegers, Kristel A1 Ingelsson, Martin A1 Rossi, Giacomina A1 Hiltunen, Mikko A1 Sims, Rebecca A1 van-der-Flier, Wiesje M A1 Ramirez, Alfredo A1 Andreassen, Ole A A1 Frikke-Schmidt, Ruth A1 Williams, Julie A1 Ruiz, Agustín A1 Lambert, Jean-Charles A1 Greicius, Michael D A1 Arosio, Beatrice A1 Benussi, Luisa A1 Boland, Anne A1 Borroni, Barbara A1 Caffarra, Paolo A1 Daian, Delphine A1 Daniele, Antonio A1 Debette, Stéphanie A1 Dufouil, Carole A1 Düzel, Emrah A1 Galimberti, Daniela A1 Giedraitis, Vilmantas A1 Grimmer, Timo A1 Graff, Caroline A1 Grünblatt, Edna A1 Hanon, Olivier A1 Hausner, Lucrezia A1 Heilmann-Heimbach, Stefanie A1 Holstege, Henne A1 Hort, Jakub A1 Jürgen, Deckert A1 Kuulasmaa, Teemu A1 van-der-Lugt, Aad A1 Masullo, Carlo A1 Mecocci, Patrizia A1 Mehrabian, Shima A1 de-Mendonça, Alexandre A1 Moebus, Susanne A1 Nacmias, Benedetta A1 Nicolas, Gael A1 Olaso, Robert A1 Papenberg, Goran A1 Parnetti, Lucilla A1 Pasquier, Florence A1 Peters, Oliver A1 Pijnenburg, Yolande A L A1 Popp, Julius A1 Rainero, Innocenzo A1 Ramakers, Inez A1 Riedel-Heller, Steffi A1 Scarmeas, Nikolaos A1 Scheltens, Philip A1 Scherbaum, Norbert A1 Schneider, Anja A1 Seripa, Davide A1 Soininen, Hilkka A1 Solfrizzi, Vincenzo A1 Spalletta, Gianfranco A1 Squassina, Alessio A1 van-Swieten, John A1 Tegos, Thomas J A1 Tremolizzo, Lucio A1 Verhey, Frans A1 Vyhnalek, Martin A1 Wiltfang, Jens A1 Boada, Merce A1 García-González, Pablo A1 Puerta, Raquel A1 Real, Luis M A1 Alvarez, Victoria A1 Bullido, Maria J A1 Clarimon, Jordi A1 Garcia-Alberca, Jose Maria A1 Mir, Pablo A1 Moreno, Fermin A1 Pastor, Pau A1 Piñol-Ripoll, Gerard A1 Molina-Porcel, Laura A1 Perez-Tur, Jordi A1 Rodriguez-Rodriguez, Eloy A1 Royo, Jose Luis A1 Sanchez-Valle, Raquel A1 Dichgans, Martin A1 Rujescu, Dan K1 Age of Onset K1 Alzheimer Disease K1 Apolipoproteins E K1 Genotype K1 Humans AB The APOE ε2 and APOE ε4 alleles are the strongest protective and risk-increasing, respectively, genetic variants for late-onset Alzheimer disease (AD). However, the mechanisms linking APOE to AD-particularly the apoE protein's role in AD pathogenesis and how this is affected by APOE variants-remain poorly understood. Identifying missense variants in addition to APOE ε2 and APOE ε4 could provide critical new insights, but given the low frequency of additional missense variants, AD genetic cohorts have previously been too small to interrogate this question robustly. To determine whether rare missense variants on APOE are associated with AD risk. Association with case-control status was tested in a sequenced discovery sample (stage 1) and followed up in several microarray imputed cohorts as well as the UK Biobank whole-exome sequencing resource using a proxy-AD phenotype (stages 2 and 3). This study combined case-control, family-based, population-based, and longitudinal AD-related cohorts that recruited referred and volunteer participants. Stage 1 included 37 409 nonunique participants of European or admixed European ancestry, with 11 868 individuals with AD and 11 934 controls passing analysis inclusion criteria. In stages 2 and 3, 475 473 participants were considered across 8 cohorts, of which 84 513 individuals with AD and proxy-AD and 328 372 controls passed inclusion criteria. Selection criteria were cohort specific, and this study was performed a posteriori on individuals who were genotyped. Among the available genotypes, 76 195 were excluded. All data were retrieved between September 2015 and November 2021 and analyzed between April and November 2021. In primary analyses, the AD risk associated with each missense variant was estimated, as appropriate, with either linear mixed-model regression or logistic regression. In secondary analyses, associations were estimated with age at onset using linear mixed-model regression and risk of conversion to AD using competing-risk regression. A total of 544 384 participants were analyzed in the primary case-control analysis; 312 476 (57.4%) were female, and the mean (SD; range) age was 64.9 (15.2; 40-110) years. Two missense variants were associated with a 2-fold to 3-fold decreased AD risk: APOE ε4 (R251G) (odds ratio, 0.44; 95% CI, 0.33-0.59; P = 4.7 × 10-8) and APOE ε3 (V236E) (odds ratio, 0.37; 95% CI, 0.25-0.56; P = 1.9 × 10-6). Additionally, the cumulative incidence of AD in carriers of these variants was found to grow more slowly with age compared with noncarriers. In this genetic association study, a novel variant associated with AD was identified: R251G always coinherited with ε4 on the APOE gene, which mitigates the ε4-associated AD risk. The protective effect of the V236E variant, which is always coinherited with ε3 on the APOE gene, was also confirmed. The location of these variants confirms that the carboxyl-terminal portion of apoE plays an important role in AD pathogenesis. The large risk reductions reported here suggest that protein chemistry and functional assays of these variants should be pursued, as they have the potential to guide drug development targeting APOE. PB American Medical Association YR 2022 FD 2022-05-31 LK http://hdl.handle.net/10668/22161 UL http://hdl.handle.net/10668/22161 LA en NO Le Guen Y, Belloy ME, Grenier-Boley B, de Rojas I, Castillo-Morales A, Jansen I, et al. Association of Rare APOE Missense Variants V236E and R251G With Risk of Alzheimer Disease. JAMA Neurol. 2022 Jul 1;79(7):652-663. DS RISalud RD Apr 10, 2025