3D Bio-Printing Advances with Organoids in Hydrogels.

Scientists have demonstrated 3D printing inside "mini-organs" growing in hydrogels, controlling their shape, activity, and even forcing tissue to grow into "molds." This can help teams study cells and organs more accurately, create realistic models of organs and disease, and even better understand how cancer spreads through different tissues. The technique allows for the creation of solid structures within a pre-existing gel to solidify specific patterns in real-time, guiding organoids growing in the gel into a particular structure by using light from a high-specification microscope.