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Publication: Frontiers in Neuroscience

5/2/2016

 
Cell-type dependent effect of surface-patterned microdot arrays on neuronal growth

M. J. Jang, W. R. Kim, S. Joo, J. R. Ryu, E. Lee, Y. Nam*, W. Sun*

This work is the fourth paper based on the collaboration with Prof. Woong Sun's Lab (고려대학교 의과대학 선웅 교수, Korea University College of Medicine). This is a sequel of our micro-dot array paper (Kim W, Jang MJ et al., Lab Chip 2014). In this work, Dr. Jang and Dr. Kim let the work to investigate the effect of the surface micro-dot array patterns on the growth of mouse spinal interneuron, mouse hippocampal neurons, and rat hippocampal neurons. While mouse hippocampal neurons showed no significantly different growth on control and patterned substrates, we found the microdot arrays had different effects on early neuronal growth depending on the cell type; spinal interneurons tended to grow faster in length, whereas hippocampal neurons tended to form more axon collateral branches in response to the microdot arrays. Although there was a similar trend in the neurite length and branch number of both neurons changed across the microdot arrays with the expanded range of size and spacing, the dominant responses of each neuron, neurite elongation of mouse spinal interneurons and branching augmentation of rat hippocampal neurons were still preserved. Therefore, our results demonstrate that the same design of micropatterns could cause different neuronal growth results, raising an intriguing issue of considering cell types in neural interface designs. 

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Source: Fig. 5, Jang et al., Front. Neurosci. 2016 (link)

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