Pioneer axons employ Cajal’s battering ram to enter the spinal cord

The fundamental mechanism of how sensory axons traverse a spinal cord glia limitans remains debatable, with some suggesting a role for boundary cap cells at the dorsal root entry zone (DREZ). Here, authors use time-lapse imaging of DRG axons at the DREZ to show that pioneer axons enter the DREZ befo...

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Bibliographic Details
Main Authors: Evan L. Nichols, Cody J. Smith
Format: article
Language:EN
Published: Nature Portfolio 2019
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Online Access:https://doaj.org/article/6e2aa4d47cf2449ebffe915f4b37a3c7
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Summary:The fundamental mechanism of how sensory axons traverse a spinal cord glia limitans remains debatable, with some suggesting a role for boundary cap cells at the dorsal root entry zone (DREZ). Here, authors use time-lapse imaging of DRG axons at the DREZ to show that pioneer axons enter the DREZ before the presence of boundary cap cells, and that this entry is critically dependent on the development of actin-rich invasion structures reminiscent of invadopodia.