发布: 2020年09月05日第10卷第17期 DOI: 10.21769/BioProtoc.3746 浏览次数: 5011
评审: Patrick Ovando-RocheAnthony FlamierThirupugal GovindarajanAnonymous reviewer(s)
相关实验方案
人 iPSC 衍生神经元与少突胶质细胞共培养用于髓鞘形成的小分子筛选分析
Stefanie Elke Chie [...] Maria Consolata Miletta
2025年05月05日 1289 阅读
Abstract
Human neuron transplantation offers novel opportunities for modeling human neurologic diseases and potentially replacement therapies. However, the complex structure of the human cerebral cortex, which is organized in six layers with tightly interconnected excitatory and inhibitory neuronal networks, presents significant challenges for in vivo transplantation techniques to obtain a balanced, functional and homeostatically stable neuronal network. Here, we present a protocol to introduce human induced pluripotent stem cell (hiPSC)-derived neural progenitors to rat brains. Using this approach, hiPSC-derived neurons structurally integrate into the rat forebrain, exhibit electrophysiological characteristics, including firing, excitatory and inhibitory synaptic activity, and establish neuronal connectivity with the host circuitry.
Keywords: Human neuron transplantation (人神经元移植)Background
The human cerebral cortex is a complex cellular mosaic containing diversified neuronal subtypes in distinct cortical layers (I-VI) that establish specific patterns of axonal output and dendritic input, providing the essential substrate of cortical circuitry (Rakic, 2009; Lodato et al., 2011; Lui et al., 2011). In particular, a balance of excitatory and inhibitory neurotransmission is necessary for proper brain function (Turrigiano and Nelson, 2004). Human induced pluripotent stem cells (hiPSCs) allow modeling human neurological diseases in a human genetic context (Dolmetsch and Geschwind, 2011; Brennand et al., 2015; Vera and Studer, 2015). Considerable advances have been made in establishing in vitro systems to differentiate hiPSCs into neurons, including generating excitatory (glutamatergic) projection neurons or inhibitory (GABAergic) interneurons (Pasca et al., 2011; Shi et al., 2012; Liu et al., 2013; Maroof et al., 2013; Nicholas et al., 2013; Espuny-Camacho et al., 2017). In vivo studies also addressed that hiPSC-derived neurons exhibit neuronal morphology and possess synaptic activity after grafting to the rodent brain (Weick et al., 2011; Nicholas et al., 2013; Espuny-Camacho et al., 2017). However, development of a balanced network of both excitatory and inhibitory neurons representative of the complex constitution of human cortex had not been achieved until our recent reports (Xu et al., 2016; Yin et al., 2019).
The protocol described here generates an in vivo model which provides a more accurate representation of the human cortex, allowing the study of the interplay between excitatory and inhibitory networks in both normal and pathological conditions. In addition, in this system, transplanted human neurons display functional neuron behaviors and show mature electrophysiological profiles. Together, using this method, hiPSC-derived neural progenitors develop into functional neurons after grafting in the rat neonatal brain, with physiological properties including excitatory and inhibitory postsynaptic currents, which are indicative of the copresence of excitatory and inhibitory networks. This model enables the study of human cortical development and diseases such as autism, schizophrenia, and Alzheimer’s disease, which are thought to involve imbalances in excitatory and inhibitory neural transmission.
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© 2020 The Authors; exclusive licensee Bio-protocol LLC.
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Readers should cite both the Bio-protocol article and the original research article where this protocol was used:
分类
干细胞 > 多能干细胞 > 细胞分化
神经科学 > 神经系统疾病 > 动物模型
细胞生物学 > 细胞移植 > 异种移植
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