Limitations of the human iPSC-derived neuron model for early-onset Alzheimer's disease.

Limitations of the human iPSC-derived neuron model for early-onset Alzheimer's disease.
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DOI:
10.1186/s13041-023-01063-5
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发表时间:
2023-11-03
期刊:
影响因子:
3.6
通讯作者:
--
中科院分区:
医学3区
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--
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在65岁之前发生的非家族性阿尔茨海默病(AD)通常被称为早发性阿尔茨海默病(EOAD),占所有AD病例的约5-6%(Mendez等人,Continuum 25:34-51,2019)。虽然EOAD表现出与在更普遍的迟发性AD(LOAD)中观察到的相同的临床病理学变化,例如淀粉样蛋白斑块、神经元缠结(NFT)、脑萎缩和认知下降(Sirkis等人,Mol Psychiatry 27:2674-88,2022;考德威尔等人,Mol Brain 15:83,2022),但EOAD患者往往具有更严重的认知缺陷,包括视觉空间、语言和执行功能障碍(Sirkis等人,Mol Psychiatry 27:2674-88,2022)。患者来源的诱导多能干细胞(iPSC)已用于建模和研究APP、PSEN 1和PSEN 2中的穿透性家族性AD(FAD)突变(Valdes et al. in Research Square 1-30,2022;考德威尔et al. in Sci Adv 6:1-16,2020),但很少用于显示更多异质性疾病机制的散发性AD形式。在这项研究中,我们试图通过RNA测序来表征来自EOAD患者的iPSC衍生的神经元。EOAD患者和非痴呆对照(NDC)受试者之间表达谱的适度差异导致有限数量的差异表达基因(DEG)。基于这一分析,我们提供的证据表明,iPSC衍生的神经元模型系统,可能是由于失去EOAD相关的表观遗传签名所产生的iPSC重编程,可能不是研究散发性AD的理想模型。在线版本包含补充材料,可通过10.1186/s13041-023-01063-5获得。
Non-familial Alzheimer’s disease (AD) occurring before 65 years of age is commonly referred to as early-onset Alzheimer’s disease (EOAD) and constitutes ~ 5–6% of all AD cases (Mendez et al. in Continuum 25:34–51, 2019). While EOAD exhibits the same clinicopathological changes such as amyloid plaques, neurofibrillary tangles (NFTs), brain atrophy, and cognitive decline (Sirkis et al. in Mol Psychiatry 27:2674–88, 2022; Caldwell et al. in Mol Brain 15:83, 2022) as observed in the more prevalent late-onset AD (LOAD), EOAD patients tend to have more severe cognitive deficits, including visuospatial, language, and executive dysfunction (Sirkis et al. in Mol Psychiatry 27:2674–88, 2022). Patient-derived induced pluripotent stem cells (iPSCs) have been used to model and study penetrative, familial AD (FAD) mutations in APP, PSEN1, and PSEN2 (Valdes et al. in Research Square 1–30, 2022; Caldwell et al. in Sci Adv 6:1–16, 2020) but have been seldom used for sporadic forms of AD that display more heterogeneous disease mechanisms. In this study, we sought to characterize iPSC-derived neurons from EOAD patients via RNA sequencing. A modest difference in expression profiles between EOAD patients and non-demented control (NDC) subjects resulted in a limited number of differentially expressed genes (DEGs). Based on this analysis, we provide evidence that iPSC-derived neuron model systems, likely due to the loss of EOAD-associated epigenetic signatures arising from iPSC reprogramming, may not be ideal models for studying sporadic AD. The online version contains supplementary material available at 10.1186/s13041-023-01063-5.
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