New 3D-Printed “Organ Building Blocks” Could Reduce Dependence on Donor Organs—and Halt Dead-End Quest for Pig Organ Transplants

Organ transplantation remains the most effective treatment for end-stage organ failure, yet a severe shortage of donor organs means thousands of patients die each year while waiting for transplants that may never come. Developing alternative treatments that do not depend on donor—or animal—organs could significantly reduce this loss of life.

Scientists at the Tech University of Korea and T&R Biofab Co developed a new method of 3D bioprinting “organ building blocks.” In this approach, the printing material consists of living cells embedded in a gel, allowing the cells to maintain their intended shape after printing. A longstanding challenge in this field has been replicating the complex structures and diverse cell types found in human organs. Researchers are beginning to overcome this limitation by printing cells into precisely designed molds. These individual building blocks can then be combined to form larger, more complex structures that better mimic natural organ architecture.

In the future, this technology could enable the creation of functional, lab-grown organs for patients with end-stage organ failure, reducing reliance on donor organs while still using human-derived tissues. It may also halt the quest to use animal organs for transplantation—also called xenotransplantation.

Xenotransplantation faces significant challenges, including the risk of zoonotic disease transmission, persistent issues with organ rejection, and environmental concerns related to farming pigs for organ production. The Physicians Committee promotes alternative strategies that address the organ shortage without relying on animal use. Learn more about our work to address the organ shortage here.