Abstract
Protein micropatterning techniques, including microfluidic devices and protein micro-contact printing, enable the generation of highly controllable substrates for spatial manipulation of intracellular and extracellular signaling determinants to examine the development of cultured dissociated neurons in vitro. In particular, culture substrates coated with proteins of interest in defined stripes, including cell adhesion molecules and secreted proteins, have been successfully used to study neuronal polarization, a process in which the neuron establishes axon and dendrite identities, a critical architecture for the input/output functions of the neuron. We have recently used this methodology to pattern the extracellular protein Semaphorin 3A (Sema3A), a secreted factor known to control neuronal development in the mammalian embryonic cortex. We showed that stripe-patterned Sema3A regulates axon and dendrite formation during the early phase of neuronal polarization in cultured rat hippocampal neurons. Here, we describe microfabrication and substrate stripe micropatterning of Sema3A. We note that same methodologies can be applied to pattern other extracellular proteins that regulate neuronal development in the embryonic brain, as nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), and Netrin-1. We describe modifications of these methodologies for stripe micropatterning of membrane-permeable analog of the second messengers cyclic AMP (cAMP) and cyclic GMP (cGMP), intracellular regulators of neuronal polarization that might act downstream of Sema3A.
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Acknowledgements
This work was supported by a grant from NIH, NS084111 (M. Shelly), and by grants from the Deutsche Forschungsgemeinschaft, FZ 111 (S. Pautot). Research was carried out in part at the Center for Functional Nanomaterials, Brookhaven National Laboratory, which is supported by the U.S. Department of Energy, Office of Basic Energy Sciences, under Contract No. DE-SC0012704.
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Shelly, M., Lee, SI., Suarato, G., Meng, Y., Pautot, S. (2017). Photolithography-Based Substrate Microfabrication for Patterning Semaphorin 3A to Study Neuronal Development. In: Terman, J. (eds) Semaphorin Signaling. Methods in Molecular Biology, vol 1493. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-6448-2_24
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DOI: https://doi.org/10.1007/978-1-4939-6448-2_24
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