Cerebral Organoid oRG Cell Generation via Hydrogel Embedding
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Solution Overview
Problem
Current methods for studying primate brain development and diseases are limited due to the complexity of primate brains and the discrepancies between non-primate animal models and human brains.
Innovation Solution
A method for generating outer radial glial (oRG) cells in cerebral organoids by culturing primate stem cells in a specific medium, followed by neural induction and differentiation in the presence of inhibitors of TGF-β, BMP, and WNT, and embedding in a hydrogel that mimics the extracellular matrix.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If cerebral organoids are generated using conventional culture methods, then basic brain tissue structures can be formed, but the generation of outer radial glial cells in oSVZ-like regions is insufficient
Solution Approach 1:
The patent applies parameter changes by modifying culture conditions including adding specific growth factors (BDNF, GDNF, IGF-1, FGF2), changing medium composition, and adjusting culture duration to promote oRG cell generation in oSVZ-like regions
Solution Approach 2:
The patent uses intermediary substances such as extracellular matrix components (laminin, fibronectin, collagen IV) and growth factor cocktails as mediators to facilitate the differentiation and maintenance of oRG cells during organoid development
2Reliability
If primate stem cells are cultured for extended periods to generate complex brain structures, then more accurate brain models are obtained, but the culture time and resource consumption increase
Solution Approach 1:
The patent applies preliminary action by pre-differentiating stem cells into neural progenitor cells before organoid formation, and by pre-establishing appropriate culture conditions with specific growth factors to accelerate the development of oSVZ-like regions and reduce overall culture time
3Ease of manufacture
If non-primate animal models are used to study brain development, then experimental simplicity is maintained, but biological relevance to human brain is reduced
Solution Approach 1:
The patent uses copying by creating in vitro cerebral organoids that replicate human brain development processes, providing a human-relevant model that can be studied in the laboratory without requiring primate or human subjects, thus maintaining experimental simplicity while improving biological relevance
Data Source
AI summary
The present invention relates to a method for the generation of outer radial glial (oRG) cells of the outer sub-ventricular (oSVZ)-like region in cerebral organoids comprising (a) culturing primate stem cells in a primate stem cell medium until about day 6, thereby inducing the formation of embryonic bodies; (b) culturing the embryonic bodies as obtained in step (a) in a neural induction medium until about day 11, thereby inducing the formation of organoids; wherein an inhibitor of TGF-β, an inhibitor of BMP and an inhibitor of WNT is present from about day 2 until about day 11; (c) embedding the organoids as obtained after steps (a) and (b) and if they display a size of at least 300 μm into a hydrogel that mimics the extracellular matrix (ECM), preferably Matrigel and culturing the organoids in a cerebral differentiation medium at least until about day 40, preferably at least until about day 60 and most preferably at least until about day 80, thereby obtaining cerebral organoids with oRG cells in oSVZ-like regions, wherein the organoids in step (c) are subjected to agitation from about day 15 onward, preferably by using an orbital shaker or a spinning bioreactor; and (d) optionally isolating one or more oRG cells from the oSVZ-like region.