Research Article


2020, 13(6): 1756–1763


Nanoliposome-encapsulated caged-GABA for modulating neural electrophysiological activity with simultaneous detection by microelectrode arrays

Jingyu Xie1,2, Yilin Song1,2, Yuchuan Dai1,2, Ziyue Li1,2, Fei Gao1,2, Xuanyu Li2,3, Guihua Xiao1,2, Yu Zhang1,2, Hao Wang1,2, Zeying Lu1,2, Xingyu Jiang3,4, Wenfu Zheng3, and Xinxia Cai1,2 (*)

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1 State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China
2 University of Chinese Academy of Sciences, Beijing 100049, China
3 Beijing Engineering Research Center for BioNanotechnology, CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for NanoScience and Technology, Beijing 100190, China
4 Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen 518055, China

Keywords: neural modulation, nanoliposome, microelectrode array, light-sensitive drug
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Effective and precise neural modulation with real-time detection in the brain is of great importance and represents a significant challenge. Nanoliposome-encapsulated light-sensitive compounds have excellent characteristics such as high temporal and spatial resolution, delayed drug clearance, and restricted drug biodistribution for neural modulation. In this study, we developed a nanoliposome-based delivery system for ruthenium-based caged GABA compounds (Nanolipo-Ru) to modulate neural activity and allow for real-time monitoring using the microelectrode arrays (MEAs). The Nanolipo-Ru nanoparticles had an average size of 134.10 ± 4.30 nm and exhibited excellent stability for seven weeks. For the in vivo experiment in the rat, release of GABA by Nanolipo-Ru under blue light illumination resulted in an average firing rate reduction in interneurons and pyramidal neurons in the same brain region of 79.4% and 81.6%, respectively. Simultaneously, the average power of local field potentials in the 0–15 Hz range degraded from 4.34 to 0.85 mW. In addition, the Nanolipo-Ru nanoparticles have the potential to provide more flexible timing of modulation than unencapsulated RuBi-GABA in the experiments. These results indicated that Nanolipo-Ru could be an effective platform for regulating neuronal electrophysiology. Furthermore, nanoliposomes with appropriate modifications would render promising utilities for targeting of specific types of neurons in the future.
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Nanoliposome-encapsulated caged-GABA for modulating neural electrophysiological activity with simultaneous detection by microelectrode arrays. Nano Res. 2020, 13(6): 1756–1763

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