A major challenge in tissue engineering is not only achieving the correct cellular organization of an engineered tissue, but also expanding it to a clinically useful size after implantation. Researchers from the Wyss Institute at Harvard University have developed a synthetic biology platform that genetically programs tissues to grow large organ implants on demand. Building on a 2017 study suggesting engineered liver tissues could respond to regenerative signals released after injury, the researchers set out to identify and harness those cues.

“If we could figure out what those signals were, we could synthetically drive these factors locally in an implant to control its growth ourselves,” first author Amy Stoddard told BioWorld. Stoddard is a postdoctoral researcher at the Wyss Institute.