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Related Experiment Video

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In vitro Modeling for Neurological Diseases using Direct Conversion from Fibroblasts to Neuronal Progenitor Cells and Differentiation into Astrocytes
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Protocol Optimization for Direct Reprogramming of Primary Human Fibroblast into Induced Striatal Neurons.

Nina Kraskovskaya1,2, Anastasia Bolshakova2, Mikhail Khotin1

  • 1Center of Cellular Technologies, Institute of Cytology of the Russian Academy of Science, 194064 St. Petersburg, Russia.

International Journal of Molecular Sciences
|April 13, 2023
PubMed
Summary

This study enhances direct reprogramming to create patient-specific induced neurons for neurodegenerative disease research. Modified methods improve cell survival and yield, enabling functional studies and potential therapeutic development.

Keywords:
agingcell synchronizationdendritic spinesdirect reprogramminglentivirusesmedium spiny neuronsmicroRNA

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Biotechnology

Background:

  • Patient-specific induced neurons are crucial for modeling neurodegenerative diseases.
  • Direct reprogramming offers advantages over induced pluripotent stem cells for age-related neuropathology.
  • Existing direct reprogramming methods suffer from low cell viability and limited neuron yield.

Purpose of the Study:

  • To improve direct reprogramming efficiency and cell viability for generating induced neurons.
  • To overcome challenges like multinucleated cells and low survival rates in direct reprogramming.
  • To establish a robust method for creating patient-specific induced striatal neurons (iSNs) for disease modeling.

Main Methods:

  • Modified direct reprogramming using microRNA and transcription factors.
  • Synchronization of fibroblast cells in the G1 phase to enhance homogeneity and survival.
  • Co-culturing induced striatal neurons (iSNs) with mouse cortical neurons to assess functionality.

Main Results:

  • Achieved high efficiency in generating functionally active iSNs.
  • Increased cell viability and eliminated multinucleated cells through G1 phase synchronization.
  • Demonstrated that iSNs form functional synaptic connections in co-cultures.

Conclusions:

  • The modified direct reprogramming method significantly enhances the generation of functional induced neurons.
  • This approach improves patient-specific disease modeling for neurodegenerative conditions.
  • The technique is adaptable for creating various types of induced neurons by altering transcription factors.