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Related Experiment Videos

A multiplexed proteomics approach to differentiate neurite outgrowth patterns.

Tong Liu1, Veera D'mello, Longwen Deng

  • 1Center for Advanced Proteomics Research and Department of Biochemistry and Molecular Biology, UMDNJ-New Jersey Medical School, MSB E-609, Newark, NJ 07103, USA.

Journal of Neuroscience Methods
|June 27, 2006
PubMed
Summary

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This study used multiplexed proteomics and self-organizing maps to differentiate early molecular events in nerve growth factor (NGF)-induced and JNJ460-induced neurite outgrowth, revealing distinct protein expression patterns for each neurotrophic agent.

Area of Science:

  • Neuroscience
  • Proteomics
  • Bioinformatics

Background:

  • Neurite outgrowth is crucial for neuronal development and repair.
  • Understanding the molecular mechanisms underlying neurite outgrowth induced by different neurotrophic factors is essential.

Purpose of the Study:

  • To develop and apply a novel method for proteomics pattern discovery.
  • To delineate the early molecular events preceding neurite outgrowth induced by nerve growth factor (NGF) and JNJ460.
  • To distinguish the proteomic signatures of NGF- and JNJ460-induced neurite outgrowth.

Main Methods:

  • Utilized a novel multiplex iTRAQ proteomics method for data acquisition.
  • Applied a self-organizing map (SOM) approach for proteomics pattern discovery and data analysis.

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  • Analyzed protein expression changes in dorsal root ganglia following NGF or JNJ460 treatment.

    • Main Results:

    • NGF treatment significantly increased proteins involved in "biosynthesis function" and "ribosome localization".
    • JNJ460 treatment significantly increased proteins related to "organogenesis" and "signal transduction".
    • Identified distinct, largely non-overlapping proteomic patterns between NGF- and JNJ460-induced neurite outgrowth.

    Conclusions:

    • NGF and JNJ460 trigger distinct molecular pathways leading to neurite outgrowth.
    • Multiplexed proteomics combined with bioinformatics pattern discovery can differentiate subtle neuroproteomic patterns.
    • This approach offers a powerful tool for understanding neurotrophic factor-mediated processes.