Spatiotemporal Control of Organoid Biofabrication with Nanoengineered Bioinks

Organoids are spatiotemporal developmental systems in which tissue architecture and function emerge through dynamically coordinated interactions among cells, extracellular matrix (ECM), biochemical signals, and mechanical cues. Because these regulatory inputs vary across both space and developmental time, organoid morphogenesis requires engineering strategies that precisely control their localization, magnitude, and temporal sequence. In this review, we examine nanoengineered bioinks and bioprinting strategies as complementary approaches for coordinating the spatial organization and temporal regulation of organoid development. We discuss how bioprinting establishes cell positioning, matrix architecture, biochemical gradients, and vascular-like structures within three-dimensional (3D) organoid models. We then examine how nanoengineered bioinks control factor release, matrix remodeling, mechanical evolution, and reciprocal cell-matrix interactions over time. Applications in brain, tumor, cardiac, skeletal muscle, and intestinal organoids illustrate how these design principles support tissue-specific patterning, multicellular interactions, and functional maturation. Finally, we highlight future directions for advancing organoid bioprinting toward predictive and developmentally responsive platforms, including adaptive bioinks, longitudinal monitoring, and data-guided optimization.