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Novel Microglia Depletion Systems: A Genetic Approach Utilizing Conditional Diphtheria Toxin Receptor Expression and

Maja Kitic1, Peter See2, Julia Bruttger1

  • 1Institute for Molecular Medicine, University Medical Center of the Johannes Gutenberg University of Mainz, Mainz, Germany.

Methods in Molecular Biology (Clifton, N.J.)
|August 9, 2019
PubMed

Insights

Researchers developed two methods to deplete microglia, the immune cells of the brain. These genetic and pharmacological approaches allow for efficient and reversible microglia ablation, aiding CNS research.

Area of Science:

  • Neuroscience
  • Immunology
  • Cell Biology

Background:

  • Microglia are the primary macrophages within the central nervous system (CNS).
  • Microglia play crucial roles in CNS physiology and disease.
  • Understanding microglia function requires effective depletion strategies.

Purpose of the Study:

  • To describe two distinct methods for efficient microglia ablation.
  • To provide tools for investigating microglia roles in the CNS.
  • To enable reversible depletion for dynamic studies.

Main Methods:

  • A genetic model using DTRMG mice with diphtheria toxin receptor (DTR) expression under the CX3CR1 promoter.
  • A pharmacological model using a blocking antibody against macrophage colony-stimulating factor 1 receptor (CSF-1R).
  • Assessment of microglia depletion via flow cytometry.

Main Results:

  • Both systemic diphtheria toxin and anti-CSF-1R antibody administration led to highly efficient microglia depletion.
  • The depletion of microglia populations in the CNS was reversible.
  • Flow cytometry confirmed the efficacy of both ablation methods.

Conclusions:

  • The described genetic and pharmacological models provide robust tools for microglia research.
  • These methods allow for controlled and reversible manipulation of microglia populations.
  • Further investigation into microglia function in health and disease is facilitated by these approaches.
Keywords:
Anti-CSF-1R antibody AFS98CSF-1RCX3CR1Diphtheria toxin receptorFACSMicroglia depletionTamoxifen

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