The DLK-1 kinase promotes mRNA stability and local translation in C. elegans synapses and axon regeneration.

Published

Journal Article

Growth cone guidance and synaptic plasticity involve dynamic local changes in proteins at axons and dendrites. The Dual-Leucine zipper Kinase MAPKKK (DLK) has been previously implicated in synaptogenesis and axon outgrowth in C. elegans and other animals. Here we show that in C. elegans DLK-1 regulates not only proper synapse formation and axon morphology but also axon regeneration by influencing mRNA stability. DLK-1 kinase signals via a MAPKAP kinase, MAK-2, to stabilize the mRNA encoding CEBP-1, a bZip protein related to CCAAT/enhancer-binding proteins, via its 3'UTR. Inappropriate upregulation of cebp-1 in adult neurons disrupts synapses and axon morphology. CEBP-1 and the DLK-1 pathway are essential for axon regeneration after laser axotomy in adult neurons, and axotomy induces translation of CEBP-1 in axons. Our findings identify the DLK-1 pathway as a regulator of mRNA stability in synapse formation and maintenance and also in adult axon regeneration.

Full Text

Duke Authors

Cited Authors

  • Yan, D; Wu, Z; Chisholm, AD; Jin, Y

Published Date

  • September 4, 2009

Published In

Volume / Issue

  • 138 / 5

Start / End Page

  • 1005 - 1018

PubMed ID

  • 19737525

Pubmed Central ID

  • 19737525

Electronic International Standard Serial Number (EISSN)

  • 1097-4172

Digital Object Identifier (DOI)

  • 10.1016/j.cell.2009.06.023

Language

  • eng

Conference Location

  • United States