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Pathogenic Huntingtin Repeat Expansions in Patients with Frontotemporal Dementia and Amyotrophic Lateral Sclerosis
Neuron ( IF 16.2 ) Pub Date : 2020-11-26 , DOI: 10.1016/j.neuron.2020.11.005
Ramita Dewan 1 , Ruth Chia 1 , Jinhui Ding 2 , Richard A Hickman 3 , Thor D Stein 4 , Yevgeniya Abramzon 5 , Sarah Ahmed 6 , Marya S Sabir 6 , Makayla K Portley 6 , Arianna Tucci 7 , Kristina Ibáñez 7 , F N U Shankaracharya 8 , Pamela Keagle 8 , Giacomina Rossi 9 , Paola Caroppo 9 , Fabrizio Tagliavini 10 , Maria L Waldo 11 , Per M Johansson 12 , Christer F Nilsson 13 , , , , , , , , 14 , James B Rowe 14 , Luisa Benussi 15 , Giuliano Binetti 16 , Roberta Ghidoni 15 , Edwin Jabbari 17 , Coralie Viollet 18 , Jonathan D Glass 19 , Andrew B Singleton 20 , Vincenzo Silani 21 , Owen A Ross 22 , Mina Ryten 23 , Ali Torkamani 24 , Toshiko Tanaka 25 , Luigi Ferrucci 25 , Susan M Resnick 26 , Stuart Pickering-Brown 27 , Christopher B Brady 28 , Neil Kowal 29 , John A Hardy 30 , Vivianna Van Deerlin 31 , Jean Paul Vonsattel 3 , Matthew B Harms 32 , Huw R Morris 17 , Raffaele Ferrari 33 , John E Landers 8 , Adriano Chiò 34 , J Raphael Gibbs 2 , Clifton L Dalgard 35 , Sonja W Scholz 36 , Bryan J Traynor 37
Affiliation  

We examined the role of repeat expansions in the pathogenesis of frontotemporal dementia (FTD) and amyotrophic lateral sclerosis (ALS) by analyzing whole-genome sequence data from 2,442 FTD/ALS patients, 2,599 Lewy body dementia (LBD) patients, and 3,158 neurologically healthy subjects. Pathogenic expansions (range, 40–64 CAG repeats) in the huntingtin (HTT) gene were found in three (0.12%) patients diagnosed with pure FTD/ALS syndromes but were not present in the LBD or healthy cohorts. We replicated our findings in an independent collection of 3,674 FTD/ALS patients. Postmortem evaluations of two patients revealed the classical TDP-43 pathology of FTD/ALS, as well as huntingtin-positive, ubiquitin-positive aggregates in the frontal cortex. The neostriatal atrophy that pathologically defines Huntington’s disease was absent in both cases. Our findings reveal an etiological relationship between HTT repeat expansions and FTD/ALS syndromes and indicate that genetic screening of FTD/ALS patients for HTT repeat expansions should be considered.



中文翻译:

额颞叶痴呆和肌萎缩侧索硬化症患者的致病性亨廷顿蛋白重复扩增

我们通过分析 2,442 名 FTD/ALS 患者、2,599 名路易体痴呆 (LBD) 患者和 3,158 名神经健康患者的全基因组序列数据,研究了重复扩增在额颞叶痴呆 (FTD) 和肌萎缩侧索硬化症 (ALS) 发病机制中的作用。科目。在三名 (0.12%) 诊断为纯 FTD/ALS 综合征的患者中发现了亨廷顿 ( HTT ) 基因的致病性扩展(范围,40-64 个 CAG 重复序列),但在 LBD 或健康队列中不存在。我们在 3,674 名 FTD/ALS 患者的独立样本中重复了我们的研究结果。对两名患者的尸检评估揭示了 FTD/ALS 的经典 TDP-43 病理学,以及额叶皮层中亨廷顿蛋白阳性、泛素阳性聚集体。两种病例均不存在病理学上定义的亨廷顿病的新纹状体萎缩。我们的研究结果揭示了HTT重复扩展与 FTD/ALS 综合征之间的病因学关系,并表明应考虑对 FTD/ALS 患者进行HTT重复扩展基因筛查。

更新日期:2021-02-03
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