Axioloid Stem Cell Aggregates for Human Somitogenesis Modeling
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Solution Overview
Problem
Current methods fail to robustly recapitulate human embryo somitogenesis in vitro, including morphogenetic features such as segmentation clock oscillation and epithelial somite formation, due to ethical and technical limitations.
Innovation Solution
A three-dimensional cellular aggregate, termed axioloid, is generated in vitro from pluripotent stem cells, exhibiting polarity and reconstituting aspects of somitogenesis, including axial elongation, segmentation, and somite formation, under somitogenic culture conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If pluripotent stem cell-based approaches are used to study human somitogenesis, then ethical limitations are overcome, but the ability to robustly recapitulate human embryo somitogenesis in vitro including morphogenetic features remains lacking
Solution Approach 1:
The invention creates an in vitro model (axioloid) that copies and recapitulates the key features of human embryo somitogenesis, including segmentation clock oscillation and epithelial somite formation, without requiring actual human embryos. This allows ethical constraints to be overcome while maintaining biological fidelity.
Solution Approach 2:
The invention modifies culture conditions and cellular parameters to enable robust recapitulation of somitogenesis. By optimizing parameters such as culture medium composition, oxygen tension, and temporal signaling patterns, the system achieves reliable in vitro somitogenesis that was previously impossible with standard approaches.
2Ease of operation
If in vitro somitogenesis models are developed, then access to human embryo development is improved, but technical limitations prevent robust recapitulation of morphogenetic features
Solution Approach 1:
The invention prepares pluripotent stem cells in advance and pre-establishes the necessary culture conditions and signaling environments before initiating somitogenesis. This preliminary preparation ensures that when differentiation begins, all necessary factors are in place to robustly recapitulate morphogenetic features including segmentation clock oscillation and somite formation.
Solution Approach 2:
The invention introduces intermediary factors and signaling molecules that mediate between the cultured stem cells and the target morphogenetic outcomes. These intermediaries include growth factors, cytokines, and extracellular matrix components that facilitate precise control over segmentation and somite formation processes.
Data Source
AI summary
The present disclosure relates to a pluripotent stem cell (PSC)-based method to reconstitute axial development in vitro and to a method for producing the same. The present disclosure provides a three-dimensional cellular aggregate, termed ‘axioloids’, generated in vitro from pluripotent stem and composed of mesodermal cells wherein the cellular aggregate is polarized along its antero-posterior axis and its apical-basolateral axis. This cellular aggregate can reconstitute various aspects of somitogenesis and axial development, including axial elongation, segmentation, epithelial somite formation and patterning (formation of one or more somite-like structures), and oscillation of the segmentation clock under somitogenic culture conditions. Axioloids can also be used to derive various cellular lineages and functional cell types and can be used as a platform to model and reconstitute human embryo development, disease and evolution. Axioloids can be further utilized, among other things, for the assessment of the teratogenicity and toxicology of chemical compounds, the production and testing of cellular therapy products, the study of congenital and acquired human diseases and the evaluation of ongoing and future therapeutic approaches.