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人胚胎干细胞向神经嵴干细胞、功能性周围神经元和角膜成纤维细胞的定向分化。

Directed Differentiation of Human Embryonic Stem Cells to Neural Crest Stem Cells, Functional Peripheral Neurons, and Corneal Keratocytes.

机构信息

Faculty of Dentistry, National University of Singapore, Singapore, Singapore.

Department of Biological Sciences, National University of Singapore, Singapore, Singapore.

出版信息

Biotechnol J. 2017 Dec;12(12). doi: 10.1002/biot.201700067. Epub 2017 Aug 22.

Abstract

Neural crest stem cells (NCSCs) are a transient and multipotent cell population giving rise to various cell types with clinical importance. Isolation of human NCSCs is extremely challenging that limits our knowledge about neural crest development and application. Here, a defined protocol to efficiently direct human embryonic stem cells (hESCs) to NCSCs and multiple neural crest lineages is presented. A unique combination of small molecule inhibitors and growth factors is employed to generate NCSCs from hESCs through a neuroectoderm stage. The self-renewal and multipotent capacities of hESC-derived NCSCs are assessed subsequently. In the feeder-free system, hESC-derived NCSCs (P75 /HNK1 /AP2α /PAX6 ) in high purity are efficiently generated following neuroectodermal restriction. They can be propagated and differentiated toward multiple neural crest lineages in vitro, such as functional peripheral neurons (β-tubulin III /peripherin ), mesenchymal stem cells (CD73 CD90 CD105 ), and corneal keratocytes (keratocan ). The in vivo developmental potential of hESC-derived NCSCs is confirmed using zebrafish embryos. This report is the first demonstration of efficient differentiation of hESCs into corneal keratocytes as a monolayer in a feeder-free system. Considering the high efficacy of NCSC generation, this new method will be a useful tool for future clinical organ repair and regeneration, such as peripheral nerve regeneration and corneal repair.

摘要

神经嵴干细胞(NCSCs)是一种短暂的多能细胞群体,能够产生具有临床重要性的多种细胞类型。人 NCSCs 的分离极具挑战性,这限制了我们对神经嵴发育和应用的了解。在这里,提出了一种有效的定义方案,可将人胚胎干细胞(hESCs)定向分化为 NCSCs 和多种神经嵴谱系。通过使用小分子抑制剂和生长因子的独特组合,可从 hESCs 生成 NCSCs 并通过神经外胚层阶段。随后评估了 hESC 衍生的 NCSCs 的自我更新和多能性能力。在无饲养层系统中,通过神经外胚层限制,可高效地从 hESC 中生成高纯度的 hESC 衍生 NCSCs(P75/HNK1/AP2α/PAX6)。它们可以在体外增殖并分化为多种神经嵴谱系,例如功能性周围神经元(β-微管蛋白 III/外周蛋白)、间充质干细胞(CD73 CD90 CD105)和角膜成纤维细胞(角膜蛋白聚糖)。通过使用斑马鱼胚胎证实了 hESC 衍生的 NCSCs 的体内发育潜力。这是首次在无饲养层系统中成功地将 hESCs 分化为角膜成纤维细胞单层的报道。考虑到 NCSC 生成的高效性,这种新方法将成为未来临床器官修复和再生的有用工具,例如周围神经再生和角膜修复。

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