3D Bioprinting in Tissue Engineering Applications

Three-dimensional bioprinting has transformed the landscape of tissue engineering by enabling the precise deposition of living cells, biomaterials and bioactive molecules to create complex, three-dimensional structures that mimic native tissues. By employing techniques adapted from additive manufacturing, researchers can layer cell-laden bioinks to achieve spatial control over cell distribution and scaffold architecture. Integration of multiple printing modalities—such as extrusion, digital light processing and melt electrospinning writing—allows the fabrication of constructs with tailored mechanical properties, vascular networks and microstructural fidelity. Practical applications span from cartilage and bone repair to vascularised cardiac patches and organ prototypes for drug screening. Recent advances in bioink formulation, mechanical reinforcement and vascular integration have addressed long-standing challenges of printability, cell viability and tissue maturation. As the field progresses, the alignment of computational design with emergent biofabrication platforms is driving the translation of bioprinted implants towards clinical and industrial realisations, illustrating the global significance of this technology in regenerative medicine, personalised therapy and pharmaceutical testing.

Research from Nature Portfolio

Innovations in scaffold reinforcement have demonstrated that highly organised microfibre networks, produced by melt electrospinning writing, can be integrated within hydrogel matrices to yield composites whose stiffness and elasticity approach those of native cartilage. These reinforced constructs support chondrocyte viability and mechanobiological responsiveness, offering a route to load-bearing implants. Complementary work on silk fibroin bioinks tailored for digital light processing has shown that methacrylated silk formulations can be modulated to balance mechanical strength and cytocompatibility, enabling the fabrication of intricate organ-mimetic structures such as vessels and tracheal models with high resolution and reliable cell survival. Foundational studies on gelatin-methacryloyl synthesis have further optimised reaction parameters to achieve complete photopolymerisable substitution in a single step, standardising a key class of bioink that underpins numerous bioprinting applications.

3D Bioprinting in Tissue Engineering Applications publication trend

The graph below shows the total number of articles in 3d bioprinting in tissue engineering applications across all publications each year (not limited to Nature Index journals).

Technical terms

Bioink: A cell-laden formulation, often comprising hydrogels and biological factors, designed for deposition by bioprinting.

Hydrogel: A water-swollen, crosslinked polymer network used as a scaffold material for cell encapsulation and tissue support.

Rheology: The study of flow and deformation behaviour of materials, critical for assessing bioink printability.

Digital Light Processing: A vat polymerisation technique that uses patterned light to photopolymerise bioinks layer by layer.

Melt Electrospinning Writing: A direct-writing method that produces fine polymer fibres by electrostatic drawing of a molten polymer.

Shear-Thinning: A non-Newtonian flow property in which viscosity decreases under shear stress, facilitating extrusion during printing.

References

1. Reinforcement of hydrogels using three-dimensionally printed microfibres. Nature Communications (2015).
2. Precisely printable and biocompatible silk fibroin bioink for digital light processing 3D printing. Nature Communications (2018).
3. Precise Tuning of Facile One-Pot Gelatin Methacryloyl (GelMA) Synthesis. Scientific Reports (2016).
4. 3D Printing of Personalized Thick and Perfusable Cardiac Patches and Hearts. Advanced Science (2019).
5. Jammed Microgel Inks for 3D Printing Applications. Advanced Science (2018).