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A "Hit and Run" Approach to Inducible Direct Reprogramming of Astrocytes to Neural Stem Cells.

Maria Poulou1, Nikolaos P Mandalos2, Theodoros Karnavas2

  • 1Stem Cell Biology Laboratory, Biomedical Sciences Research Centre "Alexander Fleming," Vari-Attica, Greece.

Frontiers in Physiology
|May 6, 2016
PubMed
Summary

A novel "hit and run" gene reprogramming method uses an inducible system to rapidly convert astrocytes into radial glia cells. This technique offers a safe and efficient tool for regenerative medicine applications.

Keywords:
CREERT2FLPdoxycyclineembryonic stem cellsinduced pluripotent stem cellsneural progenitor cellstetracyclinetissue regeneration

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Area of Science:

  • Biotechnology
  • Stem Cell Biology
  • Gene Regulation

Background:

  • Inducible systems are crucial for controlled gene expression in research and potential therapies.
  • Direct reprogramming offers a pathway to generate specific cell types from somatic cells.

Purpose of the Study:

  • To develop a novel "hit and run" inducible direct reprogramming system.
  • To assess the efficiency and speed of this new reprogramming approach.

Main Methods:

  • Utilized a transiently transfected Sox2 (FLAG) construct under Leu3p-αIPM inducible control (iSox2).
  • Applied the system to primary astrocytes to induce reprogramming.
  • Analyzed cell fate conversion using nestin as a marker for radial glia cells.

Main Results:

  • Achieved direct reprogramming in a single step, 2 days post-transfection.
  • Demonstrated that iSox2 triggers endogenous Sox2 activation.
  • Successfully redirected primary astrocytes into abundant nestin-positive radial glia cells.

Conclusions:

  • The "hit and run" inducible system provides temporal and spatial control over gene expression.
  • This novel technique is a rapid, safe, and efficient tool for cell reprogramming.
  • The approach holds promise for applications in regenerative medicine.