Dynein motor contributes to stress granule dynamics in primary neurons

N. P. Tsai, Y. C. Tsui, L. N. Wei

Research output: Contribution to journalArticlepeer-review

Abstract

Mobilization and translation of mRNAs, two important events believed to involve stress granules (SGs), in neurons are important for their survival and activities. However, the formation and disassembly of SGs in neurons remains unclear. By using an arsenite-induced neuronal stress model of rat primary spinal cord neuron cultures, we demonstrate the formation of SGs that contain common SG components and RNAs in both stressed neuronal cell bodies and their neurites. By employing small interfering RNA (siRNA) knockdown, we discovered that dynein motor subunit localizes in SG, and is important for SG assembly in neurons. Under stress, dynein motor subunit also facilitates translational repression and enhances the formation and integrity of SG in neurons. By blocking the energy source of dynein motor, both the formation and disassembly of SG are attenuated. These findings demonstrate, for the first time, that dynein motor complex plays a critical role in the dynamics of neuronal SGs, as well as translation of certain mRNAs.

Original languageEnglish (US)
Pages (from-to)647-656
Number of pages10
JournalNeuroscience
Volume159
Issue number2
DOIs
StatePublished - Mar 17 2009
Externally publishedYes

Keywords

  • dynein
  • mRNA
  • neurites
  • primary neurons
  • stress granules
  • translation

ASJC Scopus subject areas

  • Neuroscience(all)

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