MAPT haplotype H1G is associated with increased risk of dementia with Lewy bodies. Issue 12 (7th June 2016)

• Record Type: Journal Article
• Authors: Labbé, Catherine; Heckman, Michael G.; Lorenzo‐Betancor, Oswaldo; Soto‐Ortolaza, Alexandra I.; Walton, Ronald L.; Murray, Melissa E.; Allen, Mariet; Uitti, Ryan J.; Wszolek, Zbigniew K.; Smith, Glenn E.; Kantarci, Kejal; Knopman, David S.; Lowe, Val J.; Jack, Clifford R.; Ertekin‐Taner, Nilüfer; Hassan, Anhar; Savica, Rodolfo; Petersen, Ronald C.; Parisi, Joseph E.; Maraganore, Demetrius M.; Graff‐Radford, Neill R.; Ferman, Tanis J.; Boeve, Bradley F.; Dickson, Dennis W.; Ross, Owen A.
• Is Part Of: Alzheimer's & dementia. Volume 12:Issue 12(2016)
• Page Start: 1297
• Page End: 1304
• Publication Date: 2016-06-07
• Subjects: Dementia with Lewy bodies -- Lewy body disease -- Genetic association study -- MAPT -- tau protein; Alzheimer's disease -- Periodicals; Alzheimer Disease -- Periodicals; Dementia -- Periodicals; Démence; Maladie d'Alzheimer; Périodique électronique (Descripteur de forme); Ressource Internet (Descripteur de forme); 616.83
• DOI: 10.1016/j.jalz.2016.05.002
• Languages: English
• ISSNs: 1552-5260

Abstract

Abstract: Introduction: The MAPT H1 haplotype has been associated with several neurodegenerative diseases. We were interested in exploring the role of MAPT haplotypic variation in risk of dementia with Lewy bodies (DLB). Method: We genotyped six MAPT haplotype tagging SNPs and screened 431 clinical DLB cases, 347 pathologically defined high‐likelihood DLB cases, and 1049 controls. Result: We performed haplotypic association tests and detected an association with the protective H2 haplotype in our combined series (odds ratio [OR] = 0.75). We fine‐mapped the locus and identified a relatively rare haplotype, H1G, that is associated with an increased risk of DLB (OR = 3.30, P = .0017). This association was replicated in our pathologically defined series (OR = 2.26, P = .035). Discussion: These results support a role for H1 and specifically H1G in susceptibility to DLB. However, the exact functional variant at the locus is still unknown, and additional studies are warranted to fully explain genetic risk of DLB at the MAPT locus.