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A Static Self-Directed Method for Generating Brain Organoids from Human Embryonic Stem Cells
Published on: March 4, 2020
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Engineered extracellular matrices facilitate brain organoids from human pluripotent stem cells
Ayşe J Muñiz1,2, Tuğba Topal1, Michael D Brooks3
1Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan, USA.
Annals of Clinical and Translational Neurology
|June 7, 2023
Summary
Engineered extracellular matrices (EECMs) improve brain organoid development by mimicking the brain's natural cell-matrix interactions. This novel approach enhances neural diversity and cerebrospinal fluid complexity in vitro.
Area of Science:
- Neural Engineering
- Stem Cell Biology
- Biomaterials Science
Background:
- Brain organoids offer advanced in vitro models of the human brain.
- Current brain organoids lack faithful recapitulation of cell-to-matrix interactions.
- Limitations in current models hinder structural, cellular, and functional diversity.
Purpose of the Study:
- To develop an engineered extracellular matrix (EECM) for improved brain organoid development.
- To enhance cell-to-matrix interactions in brain organoids.
- To increase the structural, cellular, and functional diversity of in vitro brain models.
Main Methods:
- Generation of brain organoids using EECMs composed of human fibrillar fibronectin on a porous polymer scaffold.
- Characterization via immunofluorescence microscopy, transcriptomics, and proteomics of the cerebrospinal fluid (CSF) compartment.
- Comparison with conventional protein matrices like Matrigel.
Main Results:
- EECMs significantly enhanced neurogenesis, glial maturation, and neuronal diversity compared to Matrigel.
- EECMs supported long-term culture, yielding large-volume organoids with substantial CSF.
- Proteomics analysis revealed increased protein diversity in the CSF of EECM-cultured organoids, mirroring adult CSF.
Conclusions:
- Engineered extracellular matrices represent a significant advancement in neural engineering.
- EECMs have the potential to substantially improve the diversity of advanced brain models.
- This technology paves the way for more sophisticated in vitro studies of brain development and disease.
