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Updated: Jun 4, 2025
Transplantation of Human Induced Pluripotent Stem Cell-Derived Microglia in Immunocompetent Mice Brain via Non-Invasive Transnasal Route
Published on: May 31, 2022
Human pluripotent stem cell-derived microglia shape neuronal morphology and enhance network activity in vitro
L M L Kok1, K Helwegen1, N F Coveña2
1Department of Complex Trait Genetics, Center for Neurogenomics and Cognitive Research, Vrije Universiteit Amsterdam, Amsterdam Neuroscience, De Boelelaan, Amsterdam 1081 HV, The Netherlands.
Background:
Microglia, the resident immune cells of the central nervous system, play a critical role in maintaining neuronal health, but are often overlooked in traditional neuron-focused in vitro models.
New Method:
In this study, we developed a novel co-culture system of human pluripotent stem cell (hPSC)-derived microglia and neurons to investigate how hPSC-derived microglia influence neuronal morphology and network activity. Using high-content morphological analysis and multi-electrode arrays (MEA), we demonstrate that these microglia successfully incorporate into neuronal networks and modulate key aspects of neuronal function.
Results:
hPSC-derived microglia significantly reduced cellular debris and altered neuronal morphology by decreasing axonal and dendritic segments and reducing synapse density. Interestingly, despite the decrease in synapse density, neuronal network activity increased.
Conclusion:
Our findings underscore the importance of including hPSC-derived microglia in in vitro models to better simulate in vivo neuroglial interactions and provide a platform for investigating neuron-glia dynamics in health and disease.
Insights
Human pluripotent stem cell-derived microglia modulate neuronal networks. This novel co-culture system reveals microglia influence neuronal morphology and network activity, crucial for understanding neuroglial interactions.
Area of Science:
- Neuroscience
- Stem Cell Biology
- Immunology
Background:
- Microglia are key immune cells in the central nervous system, vital for neuronal health.
- Traditional neuron-only in vitro models often neglect the role of microglia.
- Understanding neuron-microglia interactions is essential for neurological disease research.
Purpose of the Study:
- To develop and utilize a co-culture system of human pluripotent stem cell (hPSC)-derived microglia and neurons.
- To investigate the influence of hPSC-derived microglia on neuronal morphology and network activity.
- To establish a model for studying neuron-glia dynamics.
Main Methods:
- Co-culture of hPSC-derived microglia and neurons.
- High-content morphological analysis.
- Multi-electrode arrays (MEA) for assessing network activity.
Main Results:
- hPSC-derived microglia integrated into neuronal networks.
- Microglia reduced cellular debris and altered neuronal morphology (decreased axonal/dendritic segments, reduced synapse density).
- Neuronal network activity increased despite reduced synapse density.
Conclusions:
- hPSC-derived microglia significantly impact neuronal structure and function.
- Including microglia in in vitro models is crucial for simulating in vivo neuroglial interactions.
- This model provides a platform for investigating neuron-glia dynamics in health and disease.
