Innervated Cellular Composite for Neurotoxicity Assessment

The patent transitions from 2D monoculture models to a 3D cellular composite structure that integrates multiple cell types (keratinocytes, fibroblasts, Schwann cells, and neurons) in a spatially organized arrangement. This dimensional change enables the model to replicate the three-dimensional architecture of skin tissue, thereby improving physiological relevance and neurotoxicity assessment accuracy while maintaining manufacturability through standardized 3D culture techniques.

The patent creates a composite cellular structure combining different cell types (keratinocytes, fibroblasts, Schwann cells, and neurons) within a unified 3D matrix. This composite approach allows the model to capture the complex interactions between diverse cell populations in the skin, enhancing the accuracy of neurotoxicity assessment while preserving ease of manufacture through integrated culture protocols.

The patent employs 3D spatial organization to arrange multiple cell types in a configuration that mirrors in vivo skin architecture. This dimensional approach enables neurites to extend through the 3D matrix and interact with diverse cell populations, thereby improving the reliability of peripheral neuronal function assessment while managing model complexity through systematic structural design.

The patent implements localized cell type distribution within the 3D composite, where specific regions contain particular cell populations (e.g., keratinocytes at the surface, fibroblasts and Schwann cells in the dermal layer, and neurons with neurites extending throughout). This local quality arrangement enhances physiological relevance by replicating the functional zonation of skin tissue, while complexity is managed through modular regional design.