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Title: Leading-process actomyosin coordinates organelle positioning and adhesion receptor dynamics in radially migrating cerebellar granule neurons

Abstract

During brain development, neurons migrate from germinal zones to their final positions to assemble neural circuits. A unique saltatory cadence involving cyclical organelle movement (e.g., centrosome motility) and leading-process actomyosin enrichment prior to nucleokinesis organizes neuronal migration. While functional evidence suggests that leading-process actomyosin is essential for centrosome motility, the role of the actin-enriched leading process in globally organizing organelle transport or traction forces remains unexplored. Our results show that myosin ii motors and F-actin dynamics are required for Golgi apparatus positioning before nucleokinesis in cerebellar granule neurons (CGNs) migrating along glial fibers. Moreover, we show that primary cilia are motile organelles, localized to the leading-process F-actin-rich domain and immobilized by pharmacological inhibition of myosin ii and F-actin dynamics. Finally, leading process adhesion dynamics are dependent on myosin ii and F-actin. In conclusion, we propose that actomyosin coordinates the overall polarity of migrating CGNs by controlling asymmetric organelle positioning and cell-cell contacts as these cells move along their glial guides.

Authors:
 [1];  [1];  [2];  [1];  [2];  [1]
  1. St. Jude Children's Research Hospital, Memphis, TN (United States). Dept. of Developmental Neurobiology
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE; Work for Others (WFO); American Lebanese Syrian Associated Charities (ALSAC); National Inst. of Neurological Disorders (NINDS)
OSTI Identifier:
1286758
Grant/Contract Number:  
AC05-00OR22725; 1-FY12-455; 1R01NS066936
Resource Type:
Accepted Manuscript
Journal Name:
Neural Development
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 1749-8104
Publisher:
BioMed Central
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; Cerebellar granule neuron

Citation Formats

Trivedi, Niraj, Ramahi, Joseph S., Karakaya, Mahmut, Howell, Danielle, Kerekes, Ryan A., and Solecki, David J. Leading-process actomyosin coordinates organelle positioning and adhesion receptor dynamics in radially migrating cerebellar granule neurons. United States: N. p., 2014. Web. doi:10.1186/1749-8104-9-26.
Trivedi, Niraj, Ramahi, Joseph S., Karakaya, Mahmut, Howell, Danielle, Kerekes, Ryan A., & Solecki, David J. Leading-process actomyosin coordinates organelle positioning and adhesion receptor dynamics in radially migrating cerebellar granule neurons. United States. https://doi.org/10.1186/1749-8104-9-26
Trivedi, Niraj, Ramahi, Joseph S., Karakaya, Mahmut, Howell, Danielle, Kerekes, Ryan A., and Solecki, David J. Tue . "Leading-process actomyosin coordinates organelle positioning and adhesion receptor dynamics in radially migrating cerebellar granule neurons". United States. https://doi.org/10.1186/1749-8104-9-26. https://www.osti.gov/servlets/purl/1286758.
@article{osti_1286758,
title = {Leading-process actomyosin coordinates organelle positioning and adhesion receptor dynamics in radially migrating cerebellar granule neurons},
author = {Trivedi, Niraj and Ramahi, Joseph S. and Karakaya, Mahmut and Howell, Danielle and Kerekes, Ryan A. and Solecki, David J.},
abstractNote = {During brain development, neurons migrate from germinal zones to their final positions to assemble neural circuits. A unique saltatory cadence involving cyclical organelle movement (e.g., centrosome motility) and leading-process actomyosin enrichment prior to nucleokinesis organizes neuronal migration. While functional evidence suggests that leading-process actomyosin is essential for centrosome motility, the role of the actin-enriched leading process in globally organizing organelle transport or traction forces remains unexplored. Our results show that myosin ii motors and F-actin dynamics are required for Golgi apparatus positioning before nucleokinesis in cerebellar granule neurons (CGNs) migrating along glial fibers. Moreover, we show that primary cilia are motile organelles, localized to the leading-process F-actin-rich domain and immobilized by pharmacological inhibition of myosin ii and F-actin dynamics. Finally, leading process adhesion dynamics are dependent on myosin ii and F-actin. In conclusion, we propose that actomyosin coordinates the overall polarity of migrating CGNs by controlling asymmetric organelle positioning and cell-cell contacts as these cells move along their glial guides.},
doi = {10.1186/1749-8104-9-26},
journal = {Neural Development},
number = 1,
volume = 9,
place = {United States},
year = {Tue Dec 02 00:00:00 EST 2014},
month = {Tue Dec 02 00:00:00 EST 2014}
}

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Cited by: 13 works
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Siah Regulation of Pard3A Controls Neuronal Cell Adhesion During Germinal Zone Exit
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Mechanical Integration of Actin and Adhesion Dynamics in Cell Migration
journal, November 2010


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Inhibitory neurons from fetal rat cerebral cortex exert delayed axon formation and active migration in vitro
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Neuron's little helper: The role of primary cilia in neurogenesis
journal, January 2016


Seven in Absentia E3 Ubiquitin Ligases: Central Regulators of Neural Cell Fate and Neuronal Polarity
journal, October 2017


Dorsal-to-Ventral Neocortical Expansion is Physically Primed by Ventral Streaming of Early Embryonic Preplate Neurons
journal, January 2019


Dorsal-to-ventral neocortical expansion is physically primed by ventral streaming of early embryonic preplate neurons
posted_content, April 2019

  • Saito, Kanako; Okamoto, Mayumi; Watanabe, Yuto
  • bioRxiv
  • DOI: 10.1101/601617

Drebrin-mediated microtubule–actomyosin coupling steers cerebellar granule neuron nucleokinesis and migration pathway selection
journal, February 2017

  • Trivedi, Niraj; Stabley, Daniel R.; Cain, Blake
  • Nature Communications, Vol. 8, Issue 1
  • DOI: 10.1038/ncomms14484

Drebrin-mediated microtubule–actomyosin coupling steers cerebellar granule neuron nucleokinesis and migration pathway selection
journal, February 2017

  • Trivedi, Niraj; Stabley, Daniel R.; Cain, Blake
  • Nature Communications, Vol. 8, Issue 1
  • DOI: 10.1038/ncomms14484

Primary cilium-dependent cAMP/PKA signaling at the centrosome regulates neuronal migration
journal, November 2019

  • Stoufflet, Julie; Chaulet, Maxime; Doulazmi, Mohamed
  • Science Advances
  • DOI: 10.1101/765925

Seven in Absentia E3 Ubiquitin Ligases: Central Regulators of Neural Cell Fate and Neuronal Polarity
journal, October 2017


Genetic and Molecular Approaches to Study Neuronal Migration in the Developing Cerebral Cortex
journal, May 2017