Nanocomposite Hydrogels and Micro/Nanostructures for Printing Organoids.

Organoids are 3D artificial miniature organs composed of a cluster of self-renewing and self-organizing cells , which mimic the functions of real organs. Nanotechnologies, including the preparation of nanomaterials and the fabrication of micro/nanostructures, have been proven to promote cell proliferation, guide cell differentiation, and regulate cell self-organization, showing great promise in engineering organoids. In this Perspective, different types of nanocomposite hydrogels for organoid culture are summarized, the effects of micro/nanostructures on organoid growth and development are discussed, and 3D bioprinting technologies for constructing organoid models are introduced.