Modeling human-specific interlaminar astrocytes in the mouse cerebral cortex
Ragunathan Padmashri1, Baiyan Ren2, Braden Oldham1
1Department of Neurological Sciences, University of Nebraska Medical Center, Omaha, Nebraska, USA.
The Journal of Comparative Neurology
|July 9, 2020
Summary
Human interlaminar astrocytes, unique to primate brains, were modeled in mice. This breakthrough allows studying their function and role in neurological diseases.
Area of Science:
- Neuroscience
- Glial cell biology
- Astrocyte heterogeneity
Background:
- Astrocytes regulate brain development and homeostasis.
- Human astrocytes exhibit unique interlaminar astrocytes in the cerebral cortex.
- The function of these primate-specific astrocytes is poorly understood due to limited models.
Purpose of the Study:
- To model human interlaminar astrocytes in a living organism.
- To investigate the functional properties of human interlaminar astrocytes.
- To explore their role in neuronal circuit regulation and neurological diseases.
Main Methods:
- Human induced pluripotent stem cells (hiPSCs) were differentiated into astrocytes.
- These human astrocytes were engrafted into the mouse cortex, creating humanized glial chimeric mice.
- This model allows for in vivo study of human astrocyte function.
Main Results:
- Successfully modeled human interlaminar astrocytes in a chimeric mouse brain.
- Established a novel platform for studying human astrocyte-mouse neuron interactions.
- Opened avenues for investigating astrocyte dysfunction in neurological conditions.
Conclusions:
- Humanized glial chimeric mice provide a viable model for studying primate-specific astrocytes.
- This model facilitates research into neuron-glial interactions.
- It offers a new tool for understanding and potentially treating neurological diseases involving astrocytes.
