Scientists at Pohang University of Science and Technology and Kyungpook National University have achieved a major milestone in regenerative medicine by 3D printing an artificial cornea.
Using a specialized "bioink" derived from decellularized corneal stroma and stem cells, the team successfully replicated the complex collagen lattice essential for human vision. Unlike previous attempts with synthetic materials, this bioprinted tissue maintains the exact transparency and flexibility required for the eye to function naturally, offering a potential solution for the global shortage of donor corneas.
The success of this innovation lies in the team's ability to regulate "shear stress" during the printing process. This technique allows for the precise alignment of collagen fibrils, mimicking the native architectural pattern of a human cornea—a feat previously thought impossible. By creating a biocompatible environment that supports cellular growth and optical clarity, this research marks a significant leap forward in bioengineering. This development could eventually reduce the risk of transplant rejection and provide millions of patients with a life-changing alternative to traditional grafts.
source: Kim, J. H., Kim, K. W., Yun, J. W., & Cho, D. W. Shear-induced alignment of collagen fibrils using 3D cell printing for corneal stroma tissue engineering. Biofabrication.
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