Abstract
Performing exome sequencing in 14 autosomal dominant early-onset Alzheimer disease (ADEOAD) index cases without mutation on known genes (amyloid precursor protein (APP), presenilin1 (PSEN1) and presenilin2 (PSEN2)), we found that in five patients, the SORL1 gene harbored unknown nonsense (n=1) or missense (n=4) mutations. These mutations were not retrieved in 1500 controls of same ethnic origin. In a replication sample, including 15 ADEOAD cases, 2 unknown non-synonymous mutations (1 missense, 1 nonsense) were retrieved, thus yielding to a total of 7/29 unknown mutations in the combined sample. Using in silico predictions, we conclude that these seven private mutations are likely to have a pathogenic effect. SORL1 encodes the Sortilin-related receptor LR11/SorLA, a protein involved in the control of amyloid beta peptide production. Our results suggest that besides the involvement of the APP and PSEN genes, further genetic heterogeneity, involving another gene of the same pathway is present in ADEOAD.
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Acknowledgements
This work was supported by a grant from the Clinical Research Hospital Program from the French Ministry of Health (GMAJ, PHRC 2008/067), to DH and DC, and sponsored by the University Hospital of Rouen. We thank the Integragen society, which performed exome sequencing. We thank the LITIS and the TIBS team for providing bioinformatics support, André Blavier for the Alamut software, Mario Tosi for helpful discussions, and Tracey Avequin for editing the manuscript.
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Supplementary Information accompanies the paper on the Molecular Psychiatry website
Appendix A
Appendix A
PHRC GMAJ collaborators
The investigators of the French GMAJ project include Didier Hannequin, Dominique Campion, Olivier Martinaud, Lucie Guyant-Maréchal and David Wallon (Centre Hospitalo Universitaire (CHU), Rouen); Olivier Godefroy and Candice Picard (CHU Amiens); Frédérique Etcharry-Bouyx (CHU Angers); Eric Berger (CHU Besancon); Jean-Francois Dartigues and Sophie Auriacombe (CHU Bordeaux); Vincent de la Sayette (CHU Caen); Francois Sellal (CH Colmar); Olivier Rouaud and Christel Thauvin (CHU Dijon); Olivier Moreaud (CHU Grenoble); Stéphanie Bombois, Adeline Rollin-Sillaire, Marie-Anne Mackowiak and Florence Pasquier (CHU Lille); Isabelle Roullet-Solignac and Alain Vighetto (CHU Lyon); Mira Didic, Olivier Félician and Mathieu Ceccaldi (CHU Marseille); Audrey Gabelle and Jacques Touchon (CHU Montpellier); Martine Vercelletto and Claire Boutoleau-Bretonnière (CHU Nantes); Pierre Labauge and Giovanni Castelnovo (CHU Nimes); Claire Paquet and Jacques Hugon (CHU Lariboisière); Agnès Michon, Isabelle Le Ber and Bruno Dubois (CHU La Salpêtrière, Paris); Catherine Thomas-Antérion (CHU Saint-Etienne); Frédéric Blanc and Christine Tranchant (CHU Strasbourg); Jérémie Pariente, Michèle Puel and Jean-Francois Demonet (CHU Toulouse); Caroline Hommet and Karl Mondon (CHU Tours); Hélène Mollion and Bernard Croisile (CMRR CHU Lyon); Mathilde Sauvée (CHU Nancy); Gaelle Godenèche and Foucauld De Boisgueheneuc (CHU Poitiers).
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Pottier, C., Hannequin, D., Coutant, S. et al. High frequency of potentially pathogenic SORL1 mutations in autosomal dominant early-onset Alzheimer disease. Mol Psychiatry 17, 875–879 (2012). https://doi.org/10.1038/mp.2012.15
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DOI: https://doi.org/10.1038/mp.2012.15