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二维 TiCTMXene 通过电刺激促进神经干细胞的增殖和神经分化。

2D TiCTMXene couples electrical stimulation to promote proliferation and neural differentiation of neural stem cells.

机构信息

Institute for Cardiovascular Science & Department of Cardiovascular Surgery of the First Affiliated Hospital, Medical College, Soochow University, Suzhou 215000, China; Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, Yunnan 650500, China; Key Laboratory for Developmental Genes and Human Disease, Ministry of Education, School of Life Science and Technology, Southeast University, Nanjing 210096, China.

Institute for Cardiovascular Science & Department of Cardiovascular Surgery of the First Affiliated Hospital, Medical College, Soochow University, Suzhou 215000, China.

出版信息

Acta Biomater. 2022 Feb;139:105-117. doi: 10.1016/j.actbio.2020.12.035. Epub 2020 Dec 31.

Abstract

Preclinical studies involving stem cells require efficient physiochemical regulations on the fate of such cells. Because of their unique planar structure, metallic conductivity, and flexible surface functionalization, MXenes show potential for modulating stem cell fate. Here, the TiCTMXenenanosheets are dispersed on tissue culture polystyrene (TCPS). When primary mouse neural stem cells (NSCs) are cultured on laminin-coated TiCTMXene film, they form stable adhesion, retain their proliferative ability, and show extensive spreading of terminal extensions. With respect to their functional activity, NSCs cultured on TiCTMXene films form more active and synchronous network activity than those cultured on TCPS substrates. Moreover, TiCTMXene film significantly promotes the neural differentiation and the neurons have longer neurites and greater numbers of branch points and branch tips. NSC-derived neurons grown on the TiCT MXene film preserved normal synapse development. Finally, electrical stimulation coupled with TiCTMXene film significantly enhances the proliferation of NSCs. These results indicate that TiCTMXene is an efficient interface for the proliferation and neural differentiation of NSC and the maturation of NSC-derived neurons, which expands the potential uses of the MXene family of materials and provides new strategies for stem cell studies. STATEMENT OF SIGNIFICANCE: The 2DTiCTMXenenanosheets were applied to be an interface for regulating neural stem cells (NSCs). NSCs cultured on TiCTMXene film possessed higher proliferative ability with higher and more synchronous electrical activities. Moreover, TiCTMXene film significantly promoted the neural differentiation ratio of NSCs, and the neurons derived from NSCs cultured on TiCTMXene film had longer neurites and greater numbers of branch points and branch tips.When electrical stimulation was applied to NSCs via the TiCTMXene film, it significantly enhanced the proliferation of NSCs. This work expands the potential uses of the MXene family of materials and provides new strategies for stem cell studies.

摘要

涉及干细胞的临床前研究需要对这些细胞的命运进行有效的物理化学调控。由于其独特的平面结构、金属导电性和灵活的表面功能化,MXenes 显示出调节干细胞命运的潜力。在这里,TiCTMXene 纳米片分散在组织培养聚苯乙烯 (TCPS) 上。当原代小鼠神经干细胞 (NSCs) 培养在层粘连蛋白涂覆的 TiCTMXene 薄膜上时,它们形成稳定的粘附,保持其增殖能力,并表现出末端延伸的广泛扩展。就其功能活性而言,培养在 TiCTMXene 薄膜上的 NSCs 形成的网络活动比培养在 TCPS 基底上的更活跃和同步。此外,TiCTMXene 薄膜显著促进了神经分化,并且神经元具有更长的神经突和更多的分支点和分支尖端。在 TiCT MXene 薄膜上生长的 NSC 衍生神经元保持正常的突触发育。最后,电刺激与 TiCTMXene 薄膜相结合显著增强了 NSCs 的增殖。这些结果表明,TiCTMXene 是 NSCs 增殖和神经分化以及 NSC 衍生神经元成熟的有效界面,扩展了 MXene 材料家族的潜在用途,并为干细胞研究提供了新的策略。

意义声明

2DTiCTMXene 纳米片被应用于调节神经干细胞 (NSCs)。在 TiCTMXene 薄膜上培养的 NSCs 具有更高的增殖能力,表现出更高和更同步的电活动。此外,TiCTMXene 薄膜显著促进了 NSCs 的神经分化比率,并且在 TiCTMXene 薄膜上培养的 NSCs 衍生的神经元具有更长的神经突和更多的分支点和分支尖端。当通过 TiCTMXene 薄膜向 NSCs 施加电刺激时,它显著增强了 NSCs 的增殖。这项工作扩展了 MXene 材料家族的潜在用途,并为干细胞研究提供了新的策略。

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