@article {7260, title = {Rare Functional Variant in TM2D3 is Associated with Late-Onset Alzheimer{\textquoteright}s Disease.}, journal = {PLoS Genet}, volume = {12}, year = {2016}, month = {2016 Oct}, pages = {e1006327}, abstract = {

We performed an exome-wide association analysis in 1393 late-onset Alzheimer{\textquoteright}s disease (LOAD) cases and 8141 controls from the CHARGE consortium. We found that a rare variant (P155L) in TM2D3 was enriched in Icelanders (~0.5\% versus <0.05\% in other European populations). In 433 LOAD cases and 3903 controls from the Icelandic AGES sub-study, P155L was associated with increased risk and earlier onset of LOAD [odds ratio (95\% CI) = 7.5 (3.5-15.9), p = 6.6x10-9]. Mutation in the Drosophila TM2D3 homolog, almondex, causes a phenotype similar to loss of Notch/Presenilin signaling. Human TM2D3 is capable of rescuing these phenotypes, but this activity is abolished by P155L, establishing it as a functionally damaging allele. Our results establish a rare TM2D3 variant in association with LOAD susceptibility, and together with prior work suggests possible links to the β-amyloid cascade.

}, issn = {1553-7404}, doi = {10.1371/journal.pgen.1006327}, author = {Jakobsdottir, Johanna and van der Lee, Sven J and Bis, Joshua C and Chouraki, Vincent and Li-Kroeger, David and Yamamoto, Shinya and Grove, Megan L and Naj, Adam and Vronskaya, Maria and Salazar, Jose L and DeStefano, Anita L and Brody, Jennifer A and Smith, Albert V and Amin, Najaf and Sims, Rebecca and Ibrahim-Verbaas, Carla A and Choi, Seung-Hoan and Satizabal, Claudia L and Lopez, Oscar L and Beiser, Alexa and Ikram, M Arfan and Garcia, Melissa E and Hayward, Caroline and Varga, Tibor V and Ripatti, Samuli and Franks, Paul W and Hallmans, G{\"o}ran and Rolandsson, Olov and Jansson, Jan-H{\r a}kon and Porteous, David J and Salomaa, Veikko and Eiriksdottir, Gudny and Rice, Kenneth M and Bellen, Hugo J and Levy, Daniel and Uitterlinden, Andr{\'e} G and Emilsson, Valur and Rotter, Jerome I and Aspelund, Thor and O{\textquoteright}Donnell, Christopher J and Fitzpatrick, Annette L and Launer, Lenore J and Hofman, Albert and Wang, Li-San and Williams, Julie and Schellenberg, Gerard D and Boerwinkle, Eric and Psaty, Bruce M and Seshadri, Sudha and Shulman, Joshua M and Gudnason, Vilmundur and van Duijn, Cornelia M} } @article {7786, title = {Genetic Variation in Genes Underlying Diverse Dementias May Explain a Small Proportion of Cases in the Alzheimer{\textquoteright}s Disease Sequencing Project.}, journal = {Dement Geriatr Cogn Disord}, volume = {45}, year = {2018}, month = {2018}, pages = {1-17}, abstract = {

BACKGROUND/AIMS: The Alzheimer{\textquoteright}s Disease Sequencing Project (ADSP) aims to identify novel genes influencing Alzheimer{\textquoteright}s disease (AD). Variants within genes known to cause dementias other than AD have previously been associated with AD risk. We describe evidence of co-segregation and associations between variants in dementia genes and clinically diagnosed AD within the ADSP.

METHODS: We summarize the properties of known pathogenic variants within dementia genes, describe the co-segregation of variants annotated as "pathogenic" in ClinVar and new candidates observed in ADSP families, and test for associations between rare variants in dementia genes in the ADSP case-control study. The participants were clinically evaluated for AD, and they represent European, Caribbean Hispanic, and isolate Dutch populations.

RESULTS/CONCLUSIONS: Pathogenic variants in dementia genes were predominantly rare and conserved coding changes. Pathogenic variants within ARSA, CSF1R, and GRN were observed, and candidate variants in GRN and CHMP2B were nominated in ADSP families. An independent case-control study provided evidence of an association between variants in TREM2, APOE, ARSA, CSF1R, PSEN1, and MAPT and risk of AD. Variants in genes which cause dementing disorders may influence the clinical diagnosis of AD in a small proportion of cases within the ADSP.

}, issn = {1421-9824}, doi = {10.1159/000485503}, author = {Blue, Elizabeth E and Bis, Joshua C and Dorschner, Michael O and Tsuang, Debby W and Barral, Sandra M and Beecham, Gary and Below, Jennifer E and Bush, William S and Butkiewicz, Mariusz and Cruchaga, Carlos and DeStefano, Anita and Farrer, Lindsay A and Goate, Alison and Haines, Jonathan and Jaworski, Jim and Jun, Gyungah and Kunkle, Brian and Kuzma, Amanda and Lee, Jenny J and Lunetta, Kathryn L and Ma, Yiyi and Martin, Eden and Naj, Adam and Nato, Alejandro Q and Navas, Patrick and Nguyen, Hiep and Reitz, Christiane and Reyes, Dolly and Salerno, William and Schellenberg, Gerard D and Seshadri, Sudha and Sohi, Harkirat and Thornton, Timothy A and Valadares, Otto and van Duijn, Cornelia and Vardarajan, Badri N and Wang, Li-San and Boerwinkle, Eric and Dupuis, Jos{\'e}e and Pericak-Vance, Margaret A and Mayeux, Richard and Wijsman, Ellen M} } @article {7661, title = {Whole genome sequencing of Caribbean Hispanic families with late-onset Alzheimer{\textquoteright}s disease.}, journal = {Ann Clin Transl Neurol}, volume = {5}, year = {2018}, month = {2018 Apr}, pages = {406-417}, abstract = {

Objective: To identify rare causal variants underlying known loci that segregate with late-onset Alzheimer{\textquoteright}s disease (LOAD) in multiplex families.

Methods: We analyzed whole genome sequences (WGS) from 351 members of 67 Caribbean Hispanic (CH) families from Dominican Republic and New York multiply affected by LOAD. Members of 67 CH and additional 47 Caucasian families underwent WGS as a part of the Alzheimer{\textquoteright}s Disease Sequencing Project (ADSP). All members of 67 CH families, an additional 48 CH families and an independent CH case-control cohort were subsequently genotyped for validation. Patients met criteria for LOAD, and controls were determined to be dementia free. We investigated rare variants segregating within families and gene-based associations with disease within LOAD GWAS loci.

Results: A variant in p.R434W, segregated significantly with LOAD in two large families (OR = 5.77, 95\% CI: 1.07-30.9, = 0.041). In addition, missense mutations in and under previously reported linkage peaks at 7q14.3 and 11q12.3 segregated completely in one family and in follow-up genotyping both were nominally significant ( < 0.05). We also identified rare variants in a number of genes associated with LOAD in prior genome wide association studies, including ( = 0.049), ( = 0.0098) and ( = 0.040).

Conclusions and Relevance: Rare variants in multiple genes influence the risk of LOAD disease in multiplex families. These results suggest that rare variants may underlie loci identified in genome wide association studies.

}, issn = {2328-9503}, doi = {10.1002/acn3.537}, author = {Vardarajan, Badri N and Barral, Sandra and Jaworski, James and Beecham, Gary W and Blue, Elizabeth and Tosto, Giuseppe and Reyes-Dumeyer, Dolly and Medrano, Martin and Lantigua, Rafael and Naj, Adam and Thornton, Timothy and DeStefano, Anita and Martin, Eden and Wang, Li-San and Brown, Lisa and Bush, William and van Duijn, Cornelia and Goate, Allison and Farrer, Lindsay and Haines, Jonathan L and Boerwinkle, Eric and Schellenberg, Gerard and Wijsman, Ellen and Pericak-Vance, Margaret A and Mayeux, Richard and Wang, Li-San} }