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  4. Optimization of adult sensory neuron electroporation to study mechanisms of neurite growth

Optimization of adult sensory neuron electroporation to study mechanisms of neurite growth

Frontiers in Molecular Neuroscience, 2012 · DOI: 10.3389/fnmol.2012.00011 · Published: February 8, 2012

Regenerative MedicineNeurologyGenetics

Simple Explanation

The study focuses on improving a method called electroporation to introduce genes into adult sensory neurons, specifically dorsal root ganglion (DRG) neurons. The goal is to enhance the understanding of how these neurons grow and survive, particularly after injuries affecting nerve regeneration. The optimized method aims to increase the number of successfully modified neurons while reducing the need for large numbers of animals and minimizing exposure to substances like serum that could affect results.

Study Duration
48 hours
Participants
Adult Fischer 344 rats (10–14 weeks)
Evidence Level
Not specified

Key Findings

  • 1
    The Lonza 4D-Nucleofector X-unit system achieved transfection efficiencies of 39–42%, significantly higher than previous methods for adult DRG neurons.
  • 2
    The optimized protocol requires fewer cells (3 × 105 cells per reaction) and less DNA (2 μg DNA per reaction) and allows for serum omission post-transfection.
  • 3
    DR114 electroporation code resulted in the highest transfection rate.

Research Summary

This study optimized electroporation parameters for adult rat DRG neurons using the Lonza 4D-Nucleofector system to achieve high transfection efficiencies. The optimized protocol reduced the required cell number, DNA amount, and serum usage, making it suitable for medium-throughput screening of neurite outgrowth and neuronal survival. The findings contribute to furthering the study of neuron-intrinsic mechanisms responsible for growth and survival under physiological and pathophysiological conditions.

Practical Implications

Enhanced Neurite Growth Studies

The optimized protocol enables more efficient study of neuron-intrinsic mechanisms responsible for growth and survival, aiding in identifying growth-promoting genes.

Reduced Animal Usage

By requiring fewer cells per experiment, the protocol reduces the number of animals needed for research, aligning with ethical considerations.

Improved Screening Efficiency

The high transfection efficiency and reduced serum usage make the protocol suitable for medium-throughput screening, accelerating the identification of candidate genes for in vivo testing.

Study Limitations

  • 1
    The transient nature of gene expression with electroporation.
  • 2
    The potential for DNA-mediated toxicity at high DNA concentrations.
  • 3
    Electroporation process negatively influences neurite outgrowth

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