X-chromosome-wide association study for Alzheimer's disease

Julie Le Borgne, Lissette Gomez, Sami Heikkinen, Najaf Amin, Shahzad Ahmad, Seung Hoan Choi, Joshua Bis, Benjamin Grenier-Boley, Omar Garcia Rodriguez, Luca Kleineidam, Juan Young, Kumar Parijat Tripathi, Lily Wang, Achintya Varma, Rafael Campos-Martin, Sven van der Lee, Vincent Damotte, Itziar de Rojas, Sagnik Palmal, Richard LiptonEric Reiman, Ann McKee, Philip De Jager, William Bush, Scott Small, Allan Levey, Andrew Saykin, Tatiana Foroud, Marilyn Albert, Bradley Hyman, Ronald Petersen, Steven Younkin, Mary Sano, Thomas Wisniewski, Robert Vassar, Julie Schneider, Victor Henderson, Erik Roberson, Charles DeCarli, Frank LaFerla, James Brewer, Russell Swerdlow, Linda Van Eldik, Kara Hamilton-Nelson, Henry Paulson, Adam Naj, Oscar Lopez, Helena Chui, Paul Crane, Inez Ramakers, Frans Verhey, EADB, GR@ACE study group, DEGESCO consortium, EADI, GERAD, DemGene, FinnGen Investigators, Alzheimer's Disease Genetics Consortium (ADGC), CHARGE Consortium, Céline Bellenguez*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Due to methodological reasons, the X-chromosome has not been featured in the major genome-wide association studies on Alzheimer’s Disease (AD). To address this and better characterize the genetic landscape of AD, we performed an in-depth X-Chromosome-Wide Association Study (XWAS) in 115,841 AD cases or AD proxy cases, including 52,214 clinically-diagnosed AD cases, and 613,671 controls. We considered three approaches to account for the different X-chromosome inactivation (XCI) states in females, i.e. random XCI, skewed XCI, and escape XCI. We did not detect any genome-wide significant signals (P ≤ 5 × 10 8) but identified seven X-chromosome-wide significant loci (P ≤ 1.6 × 10 6). The index variants were common for the Xp22.32, FRMPD4, DMD and Xq25 loci, and rare for the WNK3, PJA1, and DACH2 loci. Overall, this well-powered XWAS found no genetic risk factors for AD on the non-pseudoautosomal region of the X-chromosome, but it identified suggestive signals warranting further investigations.

Original languageEnglish
Article number113386
JournalMolecular Psychiatry
DOIs
Publication statusE-pub ahead of print - 4 Dec 2024

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