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Related Experiment Video

Updated: May 6, 2026

Immunofluorescence Staining Using IBA1 and TMEM119 for Microglial Density, Morphology and Peripheral Myeloid Cell Infiltration Analysis in Mouse Brain
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Microglial Response to Inflammatory Stimuli Under Electromagnetic Field Exposure.

Yssel Mendoza-Mari1, Marija Stojanovic1, Dan E Miulli2

  • 1Department of Translational Research, College of Osteopathic Medicine of the Pacific, Western University of Health Sciences, Pomona, CA, USA.

Archives of Clinical and Biomedical Research
|August 26, 2025
PubMed
Summary

Low frequency electromagnetic fields (EMF) enhance microglial cell survival and modulate inflammatory responses in a lab setting. EMF exposure also promotes phagocytic markers, suggesting potential therapeutic benefits for brain injuries.

Keywords:
Brain injuryElectromagnetic fieldHMC3 cellsMicrogliaTNF-αTraumatic Brain Injury

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Area of Science:

  • Neuroscience
  • Immunology
  • Biophysics

Background:

  • Microglial cells are crucial for brain immune surveillance and tissue homeostasis.
  • Neuroinflammation, often seen in traumatic brain injury (TBI), disrupts this balance.
  • Low frequency electromagnetic fields (EMF) show promise in modulating inflammatory responses.

Purpose of the Study:

  • To investigate the effects of EMF on human microglial cells (HMC3) in an in vitro model of neuroinflammation.
  • To assess EMF's impact on cell survival, migration, and M1/M2 phenotypic marker expression.

Main Methods:

  • Human microglial cells (HMC3) were induced with tumor necrosis factor alpha (TNF-α).
  • Cells were subsequently exposed to 2.5 Hz or 5 Hz EMF for 3 minutes.
  • Cell survival, migration, and M1/M2 marker expression were evaluated at 6, 24, and 48 hours.

Main Results:

  • EMF exposure increased the survival rate of cells treated with high-dose TNF-α.
  • EMF significantly reduced the migration rate of TNF-α treated microglial cells.
  • EMF promoted M1 and M2 phenotypic marker expression in a time-dependent manner, suggesting enhanced phagocytic capacity.

Conclusions:

  • Low frequency EMF can protect microglial cells from TNF-α induced damage and reduce migration.
  • EMF appears to stimulate microglial phagocytic activity by modulating M1/M2 marker expression.
  • Further research is needed to confirm EMF's therapeutic potential in TBI and similar conditions.