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A novel Alzheimer disease locus located near the gene encoding tau protein.

TitleA novel Alzheimer disease locus located near the gene encoding tau protein.
Publication TypeJournal Article
Year of Publication2016
AuthorsJun, G, Ibrahim-Verbaas, CA, Vronskaya, M, Lambert, J-C, Chung, J, Naj, AC, Kunkle, BW, Wang, L-S, Bis, JC, Bellenguez, C, Harold, D, Lunetta, KL, Destefano, AL, Grenier-Boley, B, Sims, R, Beecham, GW, Smith, AV, Chouraki, V, Hamilton-Nelson, KL, Ikram, MA, Fievet, N, Denning, N, Martin, ER, Schmidt, H, Kamatani, Y, Dunstan, ML, Valladares, O, Laza, AR, Zelenika, D, Ramirez, A, Foroud, TM, Choi, S-H, Boland, A, Becker, T, Kukull, WA, van der Lee, SJ, Pasquier, F, Cruchaga, C, Beekly, D, Fitzpatrick, AL, Hanon, O, Gill, M, Barber, R, Gudnason, V, Campion, D, Love, S, Bennett, DA, Amin, N, Berr, C, Tsolaki, M, Buxbaum, JD, Lopez, OL, Deramecourt, V, Fox, NC, Cantwell, LB, Tárraga, L, Dufouil, C, Hardy, J, Crane, PK, Eiriksdottir, G, Hannequin, D, Clarke, R, Evans, D, Mosley, TH, Letenneur, L, Brayne, C, Maier, W, De Jager, P, Emilsson, V, Dartigues, J-F, Hampel, H, Kamboh, MI, de Bruijn, RFAG, Tzourio, C, Pastor, P, Larson, EB, Rotter, JI, O'Donovan, MC, Montine, TJ, Nalls, MA, Mead, S, Reiman, EM, Jonsson, PV, Holmes, C, St George-Hyslop, PH, Boada, M, Passmore, P, Wendland, JR, Schmidt, R, Morgan, K, Winslow, AR, Powell, JF, Carasquillo, M, Younkin, SG, Jakobsdóttir, J, Kauwe, JSK, Wilhelmsen, KC, Rujescu, D, Nöthen, MM, Hofman, A, Jones, L, Haines, JL, Psaty, BM, Van Broeckhoven, C, Holmans, P, Launer, LJ, Mayeux, R, Lathrop, M, Goate, AM, Escott-Price, V, Seshadri, S, Pericak-Vance, MA, Amouyel, P, Williams, J, van Duijn, CM, Schellenberg, GD, Farrer, LA
Corporate AuthorsIGAP Consortium
JournalMol Psychiatry
Volume21
Issue1
Pagination108-17
Date Published2016 Jan
ISSN1476-5578
KeywordsAlzheimer Disease, Apolipoprotein E4, Chromosomes, Human, Pair 17, Genome-Wide Association Study, Humans, Polymorphism, Single Nucleotide, tau Proteins
Abstract

APOE ɛ4, the most significant genetic risk factor for Alzheimer disease (AD), may mask effects of other loci. We re-analyzed genome-wide association study (GWAS) data from the International Genomics of Alzheimer's Project (IGAP) Consortium in APOE ɛ4+ (10 352 cases and 9207 controls) and APOE ɛ4- (7184 cases and 26 968 controls) subgroups as well as in the total sample testing for interaction between a single-nucleotide polymorphism (SNP) and APOE ɛ4 status. Suggestive associations (P<1 × 10(-4)) in stage 1 were evaluated in an independent sample (stage 2) containing 4203 subjects (APOE ɛ4+: 1250 cases and 536 controls; APOE ɛ4-: 718 cases and 1699 controls). Among APOE ɛ4- subjects, novel genome-wide significant (GWS) association was observed with 17 SNPs (all between KANSL1 and LRRC37A on chromosome 17 near MAPT) in a meta-analysis of the stage 1 and stage 2 data sets (best SNP, rs2732703, P=5·8 × 10(-9)). Conditional analysis revealed that rs2732703 accounted for association signals in the entire 100-kilobase region that includes MAPT. Except for previously identified AD loci showing stronger association in APOE ɛ4+ subjects (CR1 and CLU) or APOE ɛ4- subjects (MS4A6A/MS4A4A/MS4A6E), no other SNPs were significantly associated with AD in a specific APOE genotype subgroup. In addition, the finding in the stage 1 sample that AD risk is significantly influenced by the interaction of APOE with rs1595014 in TMEM106B (P=1·6 × 10(-7)) is noteworthy, because TMEM106B variants have previously been associated with risk of frontotemporal dementia. Expression quantitative trait locus analysis revealed that rs113986870, one of the GWS SNPs near rs2732703, is significantly associated with four KANSL1 probes that target transcription of the first translated exon and an untranslated exon in hippocampus (P ⩽ 1.3 × 10(-8)), frontal cortex (P ⩽ 1.3 × 10(-9)) and temporal cortex (P⩽1.2 × 10(-11)). Rs113986870 is also strongly associated with a MAPT probe that targets transcription of alternatively spliced exon 3 in frontal cortex (P=9.2 × 10(-6)) and temporal cortex (P=2.6 × 10(-6)). Our APOE-stratified GWAS is the first to show GWS association for AD with SNPs in the chromosome 17q21.31 region. Replication of this finding in independent samples is needed to verify that SNPs in this region have significantly stronger effects on AD risk in persons lacking APOE ɛ4 compared with persons carrying this allele, and if this is found to hold, further examination of this region and studies aimed at deciphering the mechanism(s) are warranted.

DOI10.1038/mp.2015.23
Alternate JournalMol. Psychiatry
PubMed ID25778476
PubMed Central IDPMC4573764
Grant ListP30 AG013854 / AG / NIA NIH HHS / United States
N01HC55020 / HL / NHLBI NIH HHS / United States
P50 MH060451 / MH / NIMH NIH HHS / United States
N01HC55222 / HC / NHLBI NIH HHS / United States
UL1RR025005 / RR / NCRR NIH HHS / United States
U01-HG004402 / HG / NHGRI NIH HHS / United States
K01 AG030514 / AG / NIA NIH HHS / United States
AG033040 / AG / NIA NIH HHS / United States
N02-HL-6-4278 / HL / NHLBI NIH HHS / United States
N01-HC-25195 / HC / NHLBI NIH HHS / United States
MR/K013041/1 / / Medical Research Council / United Kingdom
RC2 HL102419 / HL / NHLBI NIH HHS / United States
R01 HL103612 / HL / NHLBI NIH HHS / United States
MC_U123192748 / / Medical Research Council / United Kingdom
P30 AG010124 / AG / NIA NIH HHS / United States
P50 AG023501 / AG / NIA NIH HHS / United States
RC2-HL102419 / HL / NHLBI NIH HHS / United States
089701 / / Wellcome Trust / United Kingdom
R01 AG17917 / AG / NIA NIH HHS / United States
U01 HG006375 / HG / NHGRI NIH HHS / United States
UL1TR000124 / TR / NCATS NIH HHS / United States
UC2 HL103010 / HL / NHLBI NIH HHS / United States
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167 / / Alzheimer's Society / United Kingdom
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089703 / / Wellcome Trust / United Kingdom
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