Photocurable Organoid and Spheroid Manufacturing: Encapsulation, Nutrient Transport, Fusion and Functional Maturation

Organoids and multicellular spheroids are living building blocks whose behaviour cannot be reduced to single-cell viability. They contain pre- established cell-cell contacts, internal diffusion gradients and self-organising programs that can be altered by printing, encapsulation and photocuring. This review examines photocurable manufacturing strategies in which organoids or spheroids are positioned within hydrogels, printed as dense assemblies or embedded in supporting matrices. It separates four distinct engineering outcomes: geometric placement, aggregate survival, fusion/remodelling and functional maturation. Hydrogel stiffness, degradability, mesh size and light dose can support handling while simultaneously restricting expansion or fusion. Nutrient transport becomes increasingly important as aggregate size and packing density rise. A qualification framework is proposed that measures aggregate size distribution, spacing, viability by depth, hydrogel transport, fusion kinetics and organoid-specific functional markers. The central objective is to prevent a construct from being called organoid-printed merely because organoids were deposited: the manufacturing process must preserve or enable the intended higher-order biological function.

ER-329 · Version 0.6.