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Related Experiment Video

Updated: Jan 8, 2026

Author Spotlight: In Vitro Co-Culture Model for Studying Microglia-Neuronal Interactions in Disease Conditions

Author Spotlight: In Vitro Co-Culture Model for Studying Microglia-Neuronal Interactions in Disease Conditions

Published on: July 26, 2024

Chimeric human organoid and mouse brain slice co-cultures to study microglial function.

Vasiliki Panagiotakopoulou¹, Marc Welzer², Olmo Ruiz Ormaechea¹

¹Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen, 72076 Tübingen, Germany; German Center for Neurodegenerative Diseases (DZNE), 72076 Tübingen, Germany.

|December 12, 2025

Summary

This study introduces a novel chimeric brain model using human organoids and mouse brain slices to mature human microglia. This advanced in vitro system enables long-term study of microglia in a human brain-like environment.

Keywords:

CP: neuroscience CP: stem cell research cerebral organoids chimeric in vitro model human microglia xenotransplantation

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Last Updated: Jan 8, 2026

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Published on: July 26, 2024

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Published on: June 30, 2023

Area of Science:

Neuroscience
Stem Cell Biology
Developmental Biology

Background:

Modeling human microglia in vitro is challenging for studying brain development and neurodegenerative diseases.
Human organoids (hORGs) model neuronal development but lack mature human microglia.
Existing models do not fully replicate the human brain microenvironment for microglia.

Purpose of the Study:

To develop an in vitro chimeric model for studying human microglia in a brain-like environment.
To investigate cross-species interactions between human organoids and mouse brain slices.
To establish a platform for long-term functional studies of human microglia.

Main Methods:

Co-culturing human induced pluripotent stem cell-derived organoids (hORGs) with mouse brain slice cultures (mBSCs).
Pre-differentiating human iPSC-derived microglia in mBSCs before introduction into hORGs.
Utilizing laser-induced injury to assess microglial response and functionality.

Main Results:

The chimeric model demonstrated earlier cortical neuronal differentiation markers in hORGs.
Human iPSC-derived microglia migrated into hORGs and adopted mature ramified morphology.
Microglia remained viable for months and responded to injury, showing long-term functionality.

Conclusions:

The developed in vitro chimeric model supports long-term study of human microglia.
This system facilitates mechanistic studies and compound screening for microglial function.
The model provides a more accurate representation of the human brain microenvironment for microglia research.