用于神经假体的再生电极界面

Regenerative Electrode Interfaces for Neural Prostheses.

作者信息

Thompson Cort H, Zoratti Marissa J, Langhals Nicholas B, Purcell Erin K

机构信息

Department of Electrical and Computer Engineering, Neuroscience Program, Michigan State University , East Lansing, Michigan.

出版信息

Tissue Eng Part B Rev. 2016 Apr;22(2):125-35. doi: 10.1089/ten.TEB.2015.0279. Epub 2015 Nov 23.

Abstract

Neural prostheses are electrode arrays implanted in the nervous system that record or stimulate electrical activity in neurons. Rapid growth in the use of neural prostheses in research and clinical applications has occurred in recent years, but instability and poor patency in the tissue-electrode interface undermines the longevity and performance of these devices. The application of tissue engineering strategies to the device interface is a promising approach to improve connectivity and communication between implanted electrodes and local neurons, and several research groups have developed new and innovative modifications to neural prostheses with the goal of seamless device-tissue integration. These approaches can be broadly categorized based on the strategy used to maintain and regenerate neurons at the device interface: (1) redesign of the prosthesis architecture to include finer-scale geometries and/or provide topographical cues to guide regenerating neural outgrowth, (2) incorporation of material coatings and bioactive molecules on the prosthesis to improve neuronal growth, viability, and adhesion, and (3) inclusion of cellular grafts to replenish the local neuron population or provide a target site for reinnervation (biohybrid devices). In addition to stabilizing the contact between neurons and electrodes, the potential to selectively interface specific subpopulations of neurons with individual electrode sites is a key advantage of regenerative interfaces. In this study, we review the development of regenerative interfaces for applications in both the peripheral and central nervous system. Current and future development of regenerative interfaces has the potential to improve the stability and selectivity of neural prostheses, improving the patency and resolution of information transfer between neurons and implanted electrodes.

摘要

神经假体是植入神经系统的电极阵列,用于记录或刺激神经元的电活动。近年来,神经假体在研究和临床应用中的使用迅速增长,但组织-电极界面的不稳定性和通畅性差会影响这些设备的使用寿命和性能。将组织工程策略应用于设备界面是改善植入电极与局部神经元之间的连通性和通信的一种有前景的方法,几个研究小组已经对神经假体进行了新的创新性改进,目标是实现设备与组织的无缝整合。这些方法可以根据用于在设备界面维持和再生神经元的策略大致分类为:(1)重新设计假体架构,使其具有更精细的几何形状和/或提供地形线索以引导再生神经生长,(2)在假体上加入材料涂层和生物活性分子以改善神经元生长、活力和粘附,以及(3)包含细胞移植物以补充局部神经元群体或提供再支配的目标位点(生物混合设备)。除了稳定神经元与电极之间的接触外,选择性地使特定神经元亚群与单个电极位点对接的潜力是再生界面的一个关键优势。在本研究中,我们回顾了用于外周和中枢神经系统应用的再生界面的发展。再生界面的当前和未来发展有可能提高神经假体的稳定性和选择性,改善神经元与植入电极之间信息传递的通畅性和分辨率。

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