Midline Assembloids for Human Neurodevelopment Modeling
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Solution Overview
Problem
Current methods lack the capability to generate functional human three-dimensional neural organizers that can model human neurodevelopment and study neuropsychiatric disorders in vitro.
Innovation Solution
The development of compositions and methods for generating functional human three-dimensional neural organizers from human induced pluripotent stem cells (hiPSC), specifically floor plate and roof plate organoids, which can be fused to form midline assembloids, capable of inducing specific cell fate and cell-cell interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional in vitro methods are used for studying neural development, then accessibility to human neural tissues is limited, but the ability to model human neurodevelopment and study genetic disorders is insufficient
Solution Approach 1:
The patent creates in vitro copies of human neural tissues (floor plate organoids, roof plate organoids, and midline assembloids) that replicate the structure and function of actual human neural organizer tissues. These organoid models serve as accessible substitutes for studying human neurodevelopment and genetic disorders without requiring access to actual human fetal tissues.
2Reliability
If functional human three-dimensional neural organizers are generated from hiPSC, then the ability to model human neurodevelopment is improved, but the complexity of the generation process increases
Solution Approach 1:
The patent divides the complex task of creating functional neural organizers into separate, manageable components: floor plate organoids, roof plate organoids, and neural tube organoids. Each component is generated through standardized protocols and then assembled into midline assembloids, making the overall process more controllable and reproducible.
Solution Approach 2:
The patent performs preliminary differentiation of hiPSCs into specific neural progenitor populations (floor plate, roof plate, and neural tube progenitors) before assembly. This preliminary action ensures that each organoid component is pre-configured with the appropriate cell types and signaling capabilities needed for functional integration in the final assembloid.
3Reliability
If midline assembloids are assembled from component organoids, then the ability to study cell fate and cell-cell interactions is improved, but the time and resources required for assembly increase
Solution Approach 1:
The patent separates the generation of different organoid components (floor plate, roof plate, neural tube) into independent parallel processes. This segmentation allows each component to be optimized and prepared simultaneously, reducing the overall assembly time when combining them into midline assembloids.
Data Source
AI summary
Compositions and methods are provided for the in vitro generation of functional human three-dimensional neural organizers that are functionally active and capable of choreographing in vitro midline brain development from human induced pluripotent stem cells (hiPSC). Demonstrated is a model of floor plate organizer ventral midline neurodevelopment, via the expression of a full compendium of axon guidance, morphogen, and cell signaling molecules. Floor plate organoids can be fused with spinal cord organoids into midline assembloids to induce specific cell fate and cell-cell interactions at the interface. This powerful platform can be used to model human neurodevelopment, study human genetic disorders that result from neural development, identify toxic molecules or drugs that disrupt midline brain development, and screen for therapeutics that could repair or rescue these defects.