Frontotemporal dementia and its subtypes: a genome-wide association study.

Authors:
Pau Pastor
Pau Pastor
University of Navarra
Spain
Raffaele Ferrari Dena G Hernandez Michael A Nalls Jonathan D Rohrer Adaikalavan Ramasamy John B J Kwok Carol Dobson-Stone William S Brooks Peter R Schofield Glenda M Halliday John R Hodges Olivier Piguet Lauren Bartley Elizabeth Thompson Eric Haan Isabel Hernández Agustín Ruiz Mercè Boada Barbara Borroni Alessandro Padovani Carlos Cruchaga Nigel J Cairns Luisa Benussi Giuliano Binetti Roberta Ghidoni Gianluigi Forloni Daniela Galimberti Chiara Fenoglio Maria Serpente Elio Scarpini Jordi Clarimón Alberto Lleó Rafael Blesa Maria Landqvist Waldö Karin Nilsson Christer Nilsson Ian R A Mackenzie Ging-Yuek R Hsiung David M A Mann Jordan Grafman Christopher M Morris Johannes Attems Timothy D Griffiths Ian G McKeith Alan J Thomas P Pietrini Edward D Huey Eric M Wassermann Atik Baborie Evelyn Jaros Michael C Tierney Cristina Razquin Sara Ortega-Cubero Elena Alonso Robert Perneczky Janine Diehl-Schmid Panagiotis Alexopoulos Alexander Kurz Innocenzo Rainero Elisa Rubino Lorenzo Pinessi Ekaterina Rogaeva Peter St George-Hyslop Giacomina Rossi Fabrizio Tagliavini Giorgio Giaccone James B Rowe Johannes C M Schlachetzki James Uphill John Collinge Simon Mead Vivianna M Van Deerlin Murray Grossman John Q Trojanowski Julie van der Zee William Deschamps Tim Van Langenhove Marc Cruts Christine Van Broeckhoven Stefano F Cappa Isabelle Le Ber Didier Hannequin Véronique Golfier Martine Vercelletto Alexis Brice Benedetta Nacmias Sandro Sorbi Silvia Bagnoli Irene Piaceri Jørgen E Nielsen Lena E Hjermind Matthias Riemenschneider Manuel Mayhaus Bernd Ibach Gilles Gasparoni Sabrina Pichler Wei Gu Martin N Rossor Nick C Fox Jason D Warren Maria Grazia Spillantini Huw R Morris Patrizia Rizzu Peter Heutink Julie S Snowden Sara Rollinson Anna Richardson Alexander Gerhard Amalia C Bruni Raffaele Maletta Francesca Frangipane Chiara Cupidi Livia Bernardi Maria Anfossi Maura Gallo Maria Elena Conidi Nicoletta Smirne Rosa Rademakers Matt Baker Dennis W Dickson Neill R Graff-Radford Ronald C Petersen David Knopman Keith A Josephs Bradley F Boeve Joseph E Parisi William W Seeley Bruce L Miller Anna M Karydas Howard Rosen John C van Swieten Elise G P Dopper Harro Seelaar Yolande A L Pijnenburg Philip Scheltens Giancarlo Logroscino Rosa Capozzo Valeria Novelli Annibale A Puca Massimo Franceschi Alfredo Postiglione Graziella Milan Paolo Sorrentino Mark Kristiansen Huei-Hsin Chiang Caroline Graff Florence Pasquier Adeline Rollin Vincent Deramecourt Florence Lebert Dimitrios Kapogiannis Luigi Ferrucci Stuart Pickering-Brown Andrew B Singleton John Hardy Parastoo Momeni

Lancet Neurol 2014 Jul;13(7):686-99

Laboratory of Neurogenetics, Department of Internal Medicine, Texas Tech University Health Science Center, Lubbock, Texas, USA.

Background: Frontotemporal dementia (FTD) is a complex disorder characterised by a broad range of clinical manifestations, differential pathological signatures, and genetic variability. Mutations in three genes-MAPT, GRN, and C9orf72--have been associated with FTD. We sought to identify novel genetic risk loci associated with the disorder.

Methods: We did a two-stage genome-wide association study on clinical FTD, analysing samples from 3526 patients with FTD and 9402 healthy controls. To reduce genetic heterogeneity, all participants were of European ancestry. In the discovery phase (samples from 2154 patients with FTD and 4308 controls), we did separate association analyses for each FTD subtype (behavioural variant FTD, semantic dementia, progressive non-fluent aphasia, and FTD overlapping with motor neuron disease [FTD-MND]), followed by a meta-analysis of the entire dataset. We carried forward replication of the novel suggestive loci in an independent sample series (samples from 1372 patients and 5094 controls) and then did joint phase and brain expression and methylation quantitative trait loci analyses for the associated (p<5 × 10(-8)) single-nucleotide polymorphisms.

Findings: We identified novel associations exceeding the genome-wide significance threshold (p<5 × 10(-8)). Combined (joint) analyses of discovery and replication phases showed genome-wide significant association at 6p21.3, HLA locus (immune system), for rs9268877 (p=1·05 × 10(-8); odds ratio=1·204 [95% CI 1·11-1·30]), rs9268856 (p=5·51 × 10(-9); 0·809 [0·76-0·86]) and rs1980493 (p value=1·57 × 10(-8), 0·775 [0·69-0·86]) in the entire cohort. We also identified a potential novel locus at 11q14, encompassing RAB38/CTSC (the transcripts of which are related to lysosomal biology), for the behavioural FTD subtype for which joint analyses showed suggestive association for rs302668 (p=2·44 × 10(-7); 0·814 [0·71-0·92]). Analysis of expression and methylation quantitative trait loci data suggested that these loci might affect expression and methylation in cis.

Interpretation: Our findings suggest that immune system processes (link to 6p21.3) and possibly lysosomal and autophagy pathways (link to 11q14) are potentially involved in FTD. Our findings need to be replicated to better define the association of the newly identified loci with disease and to shed light on the pathomechanisms contributing to FTD.

Funding: The National Institute of Neurological Disorders and Stroke and National Institute on Aging, the Wellcome/MRC Centre on Parkinson's disease, Alzheimer's Research UK, and Texas Tech University Health Sciences Center.

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Source
http://dx.doi.org/10.1016/S1474-4422(14)70065-1DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4112126PMC
July 2014
167 Reads
49 Citations
21.900 Impact Factor

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