3D Printing Stem Cells for Treating Brain Injuries

Oxford University researchers have successfully replicated the structure of the cerebral cortex, the outer layer of the human brain, for the first time in the field of science using 3D-printed stem cells. This technology holds promise for treating brain injuries.

Brain injuries often cause severe damage to the cerebral cortex, resulting in challenges in movement, cognition, and communication. Currently, there are no effective treatments for severe cases, negatively impacting the quality of life for patients.

To change this situation, the research team used 3D-printed human neural stem cells to create a bilayer brain tissue.

To achieve this goal, the researchers used induced pluripotent stem cells (hiPSCs), which can be easily obtained from cells collected from the patient themselves, reducing the risk of immune reactions.

Initially, the hiPSCs were differentiated into two separate layers of neural precursor cells of the cerebral cortex. Then, they were suspended in a solution to generate two types of "bio-inks" and formed a bilayer brain tissue structure through printing technology.

It is worth noting that when these printed cells were implanted into the brains of mice, they integrated with the host tissue both structurally and functionally.

Dr. Linna Zhou, the lead author of the study, said, "Our droplet printing technology provides a method for engineering living 3D tissues with desired structures, bringing us one step closer to creating customized implant therapies for brain injuries."

The researchers' current goal is to further develop their technology and create complex multilayered cerebral cortex tissues to more accurately mimic the structure of the human brain. In addition to brain injuries, these 3D-printed cells can also be used for drug evaluation and understanding brain development and cognition.