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Updated: May 22, 2026
Development of an Insert Co-culture System of Two Cellular Types in the Absence of Cell-Cell Contact
Published on: July 17, 2016
Interferon-γ modulates the functional profile of in-vitro-cultured porcine microglia
Bart R Tambuyzer1, Christophe Casteleyn, Steven Van Cruchten
1Laboratory of Applied Veterinary Morphology, Department of Veterinary Sciences, University of Antwerp, Antwerp, Belgium. bart.tambuyzer@ua.ac.be
Abstract:
Microglia are the most important immune cells within the highly specialized environment of the central nervous system. Upon activation, they transform from a resting 'ramified' into a fully functional 'amoeboid' phenotype with the ability to perform phagocytosis and generate free radicals. A combined flow cytometric assay for the simultaneous measurement of these two functions in porcine microglia in vitro is presented: reactive oxygen species are detected using hydroethidine; phagocytosis is assessed using fluorescein isothiocyanate-labeled latex beads. The combination of these two probes allowed us to distinguish four subpopulations within cultured porcine microglia on the basis of their functional activity. The effect of several exogenous stimuli [phorbol myristate acetate, conditioned medium, interferon γ (IFN-γ)] on the in-vitro functional properties of porcine microglia is investigated using this test. In particular for IFN-γ, a significant modulatory effect on the intracellular reactive oxygen species production and phagocytic activity was observed. This result suggests an alternative role of IFN-γ acting on cultured porcine microglia.
Insights
This study presents a new assay to measure microglia immune functions. Interferon gamma (IFN-γ) was found to significantly alter microglia
Area of Science:
- Neuroimmunology
- Cellular immunology
Background:
- Microglia are key immune cells in the central nervous system.
- Activated microglia exhibit phagocytosis and free radical generation.
- Understanding microglia function is crucial for neuroinflammation research.
Purpose of the Study:
- To develop a dual-function flow cytometric assay for porcine microglia.
- To analyze microglia subpopulations based on phagocytosis and reactive oxygen species (ROS) production.
- To investigate the effects of exogenous stimuli on microglia function.
Main Methods:
- Simultaneous measurement of phagocytosis (using FITC-labeled latex beads) and ROS production (using hydroethidine) in porcine microglia.
- Utilized flow cytometry to distinguish four distinct microglia subpopulations.
- Applied exogenous stimuli including phorbol myristate acetate, conditioned medium, and interferon gamma (IFN-γ).
Main Results:
- Successfully distinguished four functional subpopulations of cultured porcine microglia.
- Demonstrated that phorbol myristate acetate, conditioned medium, and IFN-γ modulate microglia activity.
- Observed a significant modulatory effect of IFN-γ on ROS production and phagocytic activity.
Conclusions:
- The developed assay effectively characterizes microglia functional states.
- IFN-γ plays a significant role in modulating porcine microglia immune responses.
- Suggests a novel function for IFN-γ in regulating microglia in vitro.
