Neuruloid Model for Human Neurulation and Disease Phenotypes
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Solution Overview
Problem
Current models fail to accurately replicate human neurulation and early developmental disorders, as they primarily focus on specific cell types rather than interactions between multiple ectodermal lineages, leading to a lack of understanding in conditions like Down's syndrome, DiGeorge syndrome, and neural tube defects.
Innovation Solution
A method involving the culture of mammalian stem cells on a circular micropattern substrate under dual SMAD inhibition to form a neural ectodermal lineage cellular structure (neuruloid) with spatially segregated neuroepithelial cells, sensory placodes, neural crest cells, and epidermal cells, mimicking the radial organization around a lumen, and using BMP to induce neurulation, allowing for the screening of agents that modify or reverse disease phenotypes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If current models focus on specific cell types, then the complexity of the model is reduced, but the accuracy in replicating human neurulation and early developmental disorders deteriorates
Solution Approach 1:
The patent combines multiple ectodermal lineages (neuroepithelial cells, sensory placodes, neural crest cells, and epidermal cells) into a single integrated three-dimensional cellular structure called a neuruloid. This merging of different cell types within one model system enables the replication of complex human neurulation processes and developmental disorders with high accuracy, resolving the contradiction between model complexity and replicative accuracy.
2Ease of operation
If current models study specific cell types in isolation, then the ease of operation is improved, but the understanding of interactions between multiple ectodermal lineages deteriorates
Solution Approach 1:
The patent segments different ectodermal lineages into distinct spatial zones within the neuruloid structure, with neuroepithelial cells at the core, neural crest cells in the intermediate zone, and epidermal cells at the periphery. This segmentation allows each cell type to be studied individually while preserving their natural interactions and spatial relationships, thus maintaining both ease of operation and comprehensive understanding of lineage interactions.
3Device complexity
If traditional models are used, then the device complexity is low, but the ability to model human-specific developmental disorders deteriorates
Solution Approach 1:
The patent employs dual SMAD inhibition (using SB431542 and LDN193189) to precisely control the differentiation parameters of human pluripotent stem cells, guiding them to form authentic human neuruloids that accurately model human-specific developmental disorders. This parameter control enables the model to reliably replicate human neurulation processes and diseases such as neural tube defects, Down syndrome, and DiGeorge syndrome, overcoming the limitations of traditional animal or simplified cell culture models.
Data Source
AI summary
The present disclosure relates to a neural ectodermal lineage cellular structure, and compositions and methods related thereto. In some embodiments, the disclosure provides a geometrically isolated neural ectodermal lineage cellular structure (neuruloid) including spatially segregated neuroepithelial cells, sensory placodes, neural crest cells, and epidermal cells having radial organization around a lumen within the neuroepithelial cells. The disclosure also provides methods directed to forming the neural ectodermal lineage cellular structure. The disclosure also provides methods and platforms directed to the neural ectodermal lineage cellular structure.