Abstract
Neural crest cells (NCCs) are highly migratory cells that originate from the dorsal region of the neural tube. The emigration of NCCs from the neural tube is an essential process for NCC production and their subsequent migration toward target sites. The migratory route of NCCs, including the surrounding neural tube tissues, involves hyaluronan (HA)-rich extracellular matrix. To model NCC migration into these HA-rich surrounding tissues from the neural tube, a mixed substrate migration assay consisting of HA (average molecular weight: 1,200-1,400 kDa) and collagen type I (Col1) was established in this study. This migration assay demonstrates that NCC cell line, O9-1, cells are highly migratory on the mixed substrate and that the HA coating is degraded at the site of focal adhesions in the course of migration. This in vitro model can be useful for further exploration of the mechanistic basis involved in NCC migration. This protocol is also applicable for evaluating different substrates as scaffolds to study NCC migration.
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