期刊
MOLECULAR NEUROBIOLOGY
卷 55, 期 3, 页码 2070-2084出版社
HUMANA PRESS INC
DOI: 10.1007/s12035-017-0471-0
关键词
Spiral ganglion neurons; Three-dimensional culture; Mutant mice; Patch clamp
资金
- Fundamental Research Funds for the Central Universities
- Yingdong Huo Education Foundation
- National 973 Basic Research Program of China [2015CB965000, 2014CB541703]
- National Natural Science Foundation of China [81570921, 81622013, 81470692, 31500852, 81570918, 81500790, 31501194, 81600803, 81200744]
- Shandong Provincial Natural Science Foundation, China [ZR2014HQ076]
- Key Project of Shandong Provincial Programs for Research and Development [2015GSF118153]
- Natural Science Foundation of Jiangsu Province [BK20150022, BK20140620, BK20150598]
In vitro culture of spiral ganglion neurons (SGNs) is a useful approach to investigate numerous aspects of neuronal behavior and to identify potential therapeutic targets for SGN protection and regeneration. However, the isolation of SGNs and the long-term maintenance of their structure and function in vitro remain challenging. In this study, we isolated SGNs from Bhlhb5-cre and Rosa26-tdTomato mice with fluorescence-activated cell sorting and determined the cell purity. We then encapsulated the pure SGNs in matrigel and cultured the SGNs in vitro. We found that the three-dimensional (3D)-matrigel culture environment significantly suppressed apoptosis and improved SGN survival in vitro, which enabled the long-term culture of SGNs for up to 6 months. The 3D-matrigel system also significantly promoted neurite outgrowth of the SGNs, increased the cells' polarity, promoted the area of growth cones, and significantly increased the synapse density of the SGNs. More importantly, the 3D-matrigel system helped to maintain and promote the electrophysiological properties of the SGNs. In conclusion, the 3D-matrigel culture system promoted the survival of purified SGNs in vitro and maintained their morphological structure and function and thus could be a useful tool for studying the physiology and pathophysiology of purified SGNs in long-term culture.
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