Matrix-Supported Active Reaggregation for Neural Tissue

The patent replaces mechanically-enforced quick reaggregation with a chemically-guided self-assembly process. Pluripotent stem cells are induced to express cell adhesion molecules (such as N-cadherin) that naturally mediate cell-cell adhesion and guide neurite outgrowth, allowing cells to self-organize into functionally interconnected networks without mechanical intervention. This substitution of mechanical forcing with biochemical guidance resolves the contradiction by enabling both efficient organoid formation and reliable functional connectivity.

The patent enables pluripotent stem cells to self-organize into complex neuronal networks through endogenous mechanisms. By providing appropriate culture conditions that induce expression of cell adhesion molecules and neurite outgrowth factors, the system allows cells to autonomously perform the reaggregation and network formation processes that would otherwise require mechanical enforcement. This self-service approach simultaneously achieves high productivity in organoid formation and reliable functional interconnectivity.

The patent applies preliminary chemical treatment to pluripotent stem cells before reaggregation, inducing expression of cell adhesion molecules and migration guidance factors in advance. This preliminary biochemical preparation allows cells to rapidly self-organize into regionally differentiated structures without requiring prolonged mechanical manipulation, thus reducing production time while maintaining or enhancing neuronal migration and regionalization precision.

The patent changes key biochemical parameters of the culture system, specifically inducing expression of cell adhesion molecules (e.g., N-cadherin) and neurite outgrowth factors. These parameter changes transform the cellular behavior from passive mechanical aggregation to active chemically-guided self-organization, enabling rapid organoid formation that simultaneously supports precise neuronal migration and regionalization patterns.

The patent introduces cell adhesion molecules (such as N-cadherin) and neurite outgrowth factors as intermediary biochemical mediators between dissociated pluripotent stem cells. These intermediaries facilitate natural cell-cell recognition and adhesion processes, guiding cells to form functionally interconnected networks. This approach maintains the simplicity of dissociation-reaggregation paradigms while dramatically improving functional interconnectivity through biochemical mediation.

The patent replaces the mechanical enforcement aspect of classic dissociation-reaggregation with chemically-mediated self-assembly. By inducing expression of cell adhesion molecules and guidance factors, the system allows dissociated cells to naturally find and connect with appropriate partners, achieving functional network interconnectivity comparable to native brain tissue without complicating the overall manufacturing process.