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Updated: Nov 18, 2025
Author Spotlight: In Vitro Co-Culture Model for Studying Microglia-Neuronal Interactions in Disease Conditions
Published on: July 26, 2024
Fully defined human pluripotent stem cell-derived microglia and tri-culture system model C3 production in Alzheimer's
Sudha R Guttikonda1,2,3, Lisa Sikkema4,5, Jason Tchieu1,2
1The Center for Stem Cell Biology, Sloan Kettering Institute for Cancer Research, New York, NY, USA.
Abstract:
Aberrant inflammation in the CNS has been implicated as a major player in the pathogenesis of human neurodegenerative disease. We developed a new approach to derive microglia from human pluripotent stem cells (hPSCs) and built a defined hPSC-derived tri-culture system containing pure populations of hPSC-derived microglia, astrocytes, and neurons to dissect cellular cross-talk along the neuroinflammatory axis in vitro. We used the tri-culture system to model neuroinflammation in Alzheimer's disease with hPSCs harboring the APPSWE+/+ mutation and their isogenic control. We found that complement C3, a protein that is increased under inflammatory conditions and implicated in synaptic loss, is potentiated in tri-culture and further enhanced in APPSWE+/+ tri-cultures due to microglia initiating reciprocal signaling with astrocytes to produce excess C3. Our study defines the major cellular players contributing to increased C3 in Alzheimer's disease and presents a broadly applicable platform to study neuroinflammation in human disease.
Insights
Researchers developed a human stem cell model to study neuroinflammation in Alzheimer's disease. This model revealed microglia and astrocytes interact to increase complement C3, a protein linked to synaptic loss.
Area of Science:
- Neuroscience
- Stem Cell Biology
- Immunology
Background:
- Aberrant central nervous system (CNS) inflammation is a key factor in neurodegenerative diseases.
- Human pluripotent stem cells (hPSCs) offer a promising source for generating neural cell types.
- Understanding glia-neuron interactions is crucial for modeling neuroinflammation.
Purpose of the Study:
- To develop a novel in vitro model for studying neuroinflammation using hPSC-derived cells.
- To investigate the role of microglia-astrocyte-neuron cross-talk in Alzheimer's disease pathogenesis.
- To identify cellular mechanisms contributing to elevated complement C3 levels in Alzheimer's disease.
Main Methods:
- Generation of pure populations of hPSC-derived microglia, astrocytes, and neurons.
- Establishment of a defined hPSC-derived tri-culture system.
- Modeling Alzheimer's disease using hPSCs with the APP SWE+/+ mutation and isogenic controls.
Main Results:
- The tri-culture system successfully recapitulated neuroinflammatory signaling.
- Complement C3 levels were potentiated in the tri-culture system.
- APP SWE+/+ tri-cultures showed further enhanced C3 production due to microglia-astrocyte reciprocal signaling.
Conclusions:
- Microglia and astrocytes play a significant role in the increased production of complement C3 in Alzheimer's disease.
- The developed hPSC-derived tri-culture platform is a valuable tool for studying neuroinflammation in human diseases.
- This study elucidates key cellular players and interactions in Alzheimer's-related neuroinflammation.
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