Transcriptional signatures of synaptic vesicle genes define myotonic dystrophy type I neurodegeneration.

Transcriptional signatures of synaptic vesicle genes define myotonic dystrophy type I neurodegeneration.
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DOI:
10.1111/nan.12725
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发表时间:
2021-12
影响因子:
5
通讯作者:
Cortes, Jesus M.
Cortes, Jesus M.
中科院分区:
医学2区
文献类型:
--
作者:
Jimenez-Marin, Antonio;Diez, Ibai;Labayru, Garazi;Sistiaga, Andone;Caballero, Maria C.;Andres-Benito, Pol;Sepulcre, Jorge;Ferrer, Isidro;Lopez de Munain, Adolfo;Cortes, Jesus M.

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描述I型肌强直性营养不良(DM1)脑变性模式的神经遗传学特征。在两组DM1患者中,脑容量损失(VL)和神经心理缺陷(NDs)的脑图与Allen人脑图谱(AHBA)提供的大规模转录组图相交。为了验证,在一小部分DM1脑样本中进行了神经病理学和RNA分析。两方面:(1)从预先选择的假设驱动基因列表中,验证性分析发现三个基因在脑变性中起主要作用:肌营养不良蛋白(DMD), α -突触核蛋白(SNCA)和微管相关蛋白tau (MAPT)。神经病理学分析证实DM1具有高度异质性的Tau‐病理学,与阿尔茨海默病不同。(2)探索性分析揭示了中枢神经系统关键生物过程富集的基因簇,如突触囊泡循环、定位、内吞作用和胞吐作用,以及血清素和多巴胺神经递质途径。RNA分析证实突触囊泡功能障碍。大规模转录组相互作用与脑成像和认知功能的结合揭示了DM1脑退化的神经生物学机制,这可能有助于确定未来的治疗策略和对该疾病的研究。从两个队列中招募的I型肌强直性营养不良(DM1)患者的转录组学与萎缩之间的关系。大脑区域的体积损失与Allen人脑图谱数据集提供的基因转录谱进行了比较,其中约有14K个基因。DM1中27个预先选择的相关基因列表也用于验证分析。
To delineate the neurogenetic profiles of brain degeneration patterns in myotonic dystrophy type I (DM1). In two cohorts of DM1 patients, brain maps of volume loss (VL) and neuropsychological deficits (NDs) were intersected to large‐scale transcriptome maps provided by the Allen Human Brain Atlas (AHBA). For validation, neuropathological and RNA analyses were performed in a small series of DM1 brain samples. Twofold: (1) From a list of preselected hypothesis‐driven genes, confirmatory analyses found that three genes play a major role in brain degeneration: dystrophin (DMD), alpha‐synuclein (SNCA) and the microtubule‐associated protein tau (MAPT). Neuropathological analyses confirmed a highly heterogeneous Tau‐pathology in DM1, different to the one in Alzheimer's disease. (2) Exploratory analyses revealed gene clusters enriched for key biological processes in the central nervous system, such as synaptic vesicle recycling, localization, endocytosis and exocytosis, and the serotonin and dopamine neurotransmitter pathways. RNA analyses confirmed synaptic vesicle dysfunction. The combination of large‐scale transcriptome interactions with brain imaging and cognitive function sheds light on the neurobiological mechanisms of brain degeneration in DM1 that might help define future therapeutic strategies and research into this condition. Association between transcriptomics and atrophy in Myotonic Dystrophy Type I (DM1) patients recruited from two cohorts. Volume loss across brain regions was compared with gene transcription profiles provided by the Allen Human Brain Atlas dataset, with about 14K genes. A list of 27 preselected relevant genes in DM1 was also used for confirmatory analyses.
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