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Updated: May 28, 2025
Characterization and Isolation of Mouse Primary Microglia by Density Gradient Centrifugation
Published on: February 16, 2018
Assessing in-vitro models for microglial development and fetal programming: a critical review
Steven Schepanski1,2, Gonza B Ngoumou1,2, Claudia Buss3,4,5,6
1Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Charité Competence Center for Traditional and Integrative Medicine (CCCTIM), Berlin, Germany.
Abstract:
This review evaluates in-vitro models for studying how maternal influences during pregnancy impact the development of offspring microglia, the immune cells of the central nervous system. The models examined include primary microglia cultures, microglia cell lines, iPSC-derived microglia, PBMC-induced microglia-like cells, 3D brain organoids derived from iPSCs, and Hofbauer cells. Each model is assessed for its ability to replicate the in-vivo environment of the developing brain, with a focus on their strengths, limitations, and practical challenges. Key factors such as scalability, genetic and epigenetic fidelity, and physiological relevance are highlighted. Microglia cell lines are highly scalable but lack genetic and epigenetic fidelity. iPSC-derived microglia provide moderate physiological relevance and patient-specific genetic insights but face operational and epigenetic challenges inherent to reprogramming. 3D brain organoids, derived from iPSCs, offer an advanced platform for studying complex neurodevelopmental processes but require extensive resources and technical expertise. Hofbauer cells, which are fetal macrophages located in the placenta and share a common developmental origin with microglia, are uniquely exposed to prenatal maternal factors and, depending on fetal barrier maturation, exhibit variable epigenetic fidelity. This makes them particularly useful for exploring the impact of maternal influences on fetal programming of microglial development. The review concludes that no single model comprehensively captures all aspects of maternal influences on microglial development, but it offers guidance on selecting the most appropriate model based on specific research objectives and experimental constraints.
Insights
This review assesses in-vitro models for studying maternal influences on offspring microglia development. No single model is perfect, but Hofbauer cells offer unique insights into prenatal programming.
Area of Science:
- Neuroscience
- Developmental Biology
- Immunology
Background:
- Maternal factors during pregnancy significantly influence offspring neurodevelopment.
- Microglia, the central nervous system's immune cells, are critical for brain development and function.
- Understanding how prenatal exposures affect microglial development is crucial for identifying risks of neurodevelopmental disorders.
Purpose of the Study:
- To review and evaluate various in-vitro models for studying maternal influences on offspring microglia development.
- To assess the strengths, limitations, and practical applicability of each model.
- To provide guidance for selecting appropriate models based on research objectives.
Main Methods:
- Systematic review of in-vitro models including primary microglia cultures, cell lines, iPSC-derived microglia, PBMC-induced microglia-like cells, 3D brain organoids, and Hofbauer cells.
- Evaluation of models based on scalability, genetic/epigenetic fidelity, and physiological relevance to the in-vivo developing brain.
- Analysis of each model's ability to replicate prenatal maternal influences on microglia.
Main Results:
- Microglia cell lines offer scalability but lack genetic/epigenetic accuracy.
- iPSC-derived microglia provide patient-specific data but have reprogramming-related challenges.
- 3D brain organoids offer complexity but demand significant resources.
- Hofbauer cells, due to their unique placental location, are valuable for studying maternal programming of microglia.
Conclusions:
- No single in-vitro model fully recapitulates maternal influences on microglia development.
- The choice of model depends on specific research questions and experimental constraints.
- Hofbauer cells present a promising avenue for investigating prenatal maternal effects on microglial programming.
