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A Novel In Vitro Model of Blast Traumatic Brain Injury
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A Novel In Vitro Platform Development in the Lab for Modeling Blast Injury to Microglia.

Dasen Xu1,2, Nu Zhang2,3, Sijie Wang2,3

  • 1School of Aeronautics, Northwestern Polytechnical University, Xi'an, China.

Frontiers in Bioengineering and Biotechnology
|July 29, 2022
PubMed
Summary

Researchers developed a new in vitro model for traumatic brain injury (TBI) using dynamic compression. Primary microglia showed an inflammatory response but survived, offering a novel way to study blast injuries.

Keywords:
blast injurydevice developmentdynamic compression stressin vitro cell modelprimary microglia

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Biomedical Engineering

Background:

  • Traumatic brain injury (TBI) often leads to chronic neurological issues.
  • Understanding TBI pathophysiology requires effective in vitro models.
  • Existing blast models are complex and difficult for labs.

Purpose of the Study:

  • To develop a reproducible in vitro model for TBI using dynamic compression.
  • To investigate the effects of single dynamic compression stress on primary microglia.
  • To understand the cellular response to blast-like injuries.

Main Methods:

  • Developed a water-hammer-based device for single dynamic compression stress.
  • Applied varying amplitudes (∼5.3, ∼9.8, ∼13.5 MPa) to primary microglia.
  • Analyzed cell apoptosis, reactive oxygen species (ROS), nitric oxide (NO), and cytokine release within 48 hours.

Main Results:

  • Primary microglia demonstrated high tolerance to blast waves, with no significant cell death observed.
  • Intercellular ROS and secretory NO generation were significantly enhanced and recovered within 48 hours.
  • A notable release of pro-inflammatory cytokines by microglia was detected, indicating an acute inflammatory response.

Conclusions:

  • The developed device provides a reproducible and safe method for applying dynamic compression to cells in vitro.
  • Microglia exhibit an acute inflammatory response to dynamic loading without significant apoptosis.
  • This model offers a new technological approach to study the mechanisms of cell blast injuries and TBI.