Smart bioink shields delicate neural cells during precision 3D printing
3D bioprinting allows scientists to build custom tissue structures for medicine, but printing soft tissues like the human brain remains a major challenge. The strong pushing forces required to squeeze biological materials through tiny printer nozzles often crush and damage sensitive cells, leading to low survival rates and weak printed structures.
Smart bioink developed by researchers at National Taiwan University shields delicate neural cells during precision 3D printing, enabling the creation of robust brain tissue models. By blending natural polymers with microscopic structures, the dynamic material maintains a liquid-like consistency while extruding, and instantly transforms back into a firm gel upon placement.
This innovative bioink, published in the journal Small, demonstrates remarkable cell protection during the extrusion process, absorbing shear forces through its microstructures and maintaining an environment conducive to cell maturation. Tested at large-scale facilities, the material ensured over 86% survival rate of neural stem cells printed through ultra-fine nozzles, resulting in strong and stable brain-slice patches suitable for handling and culture.
The breakthrough opens new opportunities for fabricating biomimetic brain tissue models and advancing central nervous system repair strategies.
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