Related Experiment Video

Updated: Oct 1, 2026

Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development
09:32

Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development

Published on: June 15, 2017

The Ras1-mitogen-activated protein kinase signal transduction pathway regulates synaptic plasticity through fasciclin

Young-Ho Koh1, Catalina Ruiz-Canada, Michael Gorczyca

  • 1Department of Biology, Neuroscience and Behavior Program, University of Massachusetts, Amherst, Massachusetts 01003, USA.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|March 30, 2002
PubMed

Insights

Ras proteins and the MAPK pathway regulate synapse structure by controlling cell adhesion molecule localization at the Drosophila neuromuscular junction, impacting synapse growth.

Area of Science:

  • Neuroscience
  • Cell Biology
  • Molecular Biology

Background:

  • Ras proteins are GTPases crucial for cell signaling, proliferation, and differentiation.
  • Ras proteins act as molecular switches, activating pathways like MAPK, PI3K, and RalGDS.
  • While implicated in synapse development, Ras protein mechanisms in synaptic regulation remain unclear.

Purpose of the Study:

  • To investigate the role of the Ras-MAPK pathway in synaptic plasticity.
  • To elucidate the molecular mechanisms linking Ras signaling to synapse structure and function.

Main Methods:

  • Utilized Drosophila larval neuromuscular junction as a model system.
  • Employed gain- and loss-of-function mutations for Ras1 and MAPK.
  • Assessed the impact on synaptic bouton number and fasciclin II localization.

Main Results:

  • Ras1 and MAPK are expressed at the Drosophila neuromuscular junction.
  • Modulating Ras1 and MAPK activity altered synaptic bouton numbers.
  • Synapse structure regulation by Ras-MAPK depends on fasciclin II localization.

Conclusions:

  • The Ras-MAPK pathway is integral to synaptic plasticity at the Drosophila neuromuscular junction.
  • This signaling cascade regulates fasciclin II-mediated cell adhesion at synaptic terminals.
  • Provides mechanistic insight into Ras-dependent regulation of synapse growth.

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