New Technique Grows Liver Tissue Inside Body, Reducing Need for Transplants

MIT and Harvard researchers develop 'BOOST' implants that respond to liver damage signals and self-regulate growth.

Apr. 19, 2026 at 2:20pm

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A new study published in Science Advances has demonstrated a technique for growing small, functional liver tissues inside the body using engineered cell implants that grow in a controlled manner, potentially reducing the need for full liver transplants in patients with advanced liver disease. The research, conducted by scientists at MIT and Harvard Medical School, involves implanting bioengineered liver tissue precursors that are designed to respond to the body's own regenerative signals, growing only to the size and functional capacity needed to compensate for damaged liver tissue.

Why it matters

Liver disease remains a leading cause of mortality worldwide, with conditions such as cirrhosis, hepatitis, and non-alcoholic fatty liver disease driving demand for transplants that far exceeds supply. This new approach could provide a scalable alternative to full transplantation, especially for patients who are not eligible for donor organs due to comorbidities or organ shortages.

The details

Unlike traditional organoid transplantation approaches, the 'BOOST' (Biologically Optimized Organoid-Supported Tissues) method uses programmable synthetic biology circuits to regulate tissue growth in vivo. The implanted cells contain genetic switches that activate proliferation in response to elevated levels of specific biomarkers associated with liver damage, and halt growth once tissue mass reaches a therapeutic threshold. In mouse models, the implanted tissues integrated with the host liver vasculature and performed key metabolic functions without inducing immune rejection or abnormal proliferation.

  • The study was published in the journal Science Advances on April 19, 2026.

The players

Sangeeta Bhatia

Senior author of the study and a professor at MIT's Institute for Medical Engineering and Science.

Luiz Bertassoni

A bioengineer at Columbia University who was not affiliated with the research.

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What they’re saying

“This approach shifts the paradigm from replacing the entire organ to augmenting the liver's intrinsic repair capacity. By engineering cells to sense the liver's needs and respond with precise, self-limiting growth, we aim to provide a scalable alternative to transplantation, especially for patients who are not eligible for donor organs due to comorbidities or organ shortages.”

— Sangeeta Bhatia, Professor, MIT Institute for Medical Engineering and Science

“The ability to control tissue growth dynamically is a significant step forward, but as with any living therapeutic, we must ensure that these engineered constructs do not evolve unpredictably over time — long-term studies will be essential.”

— Luiz Bertassoni, Bioengineer, Columbia University

What’s next

The team plans to next test the BOOST technique in porcine models, which more closely mimic human liver anatomy and physiology, followed by discussions with regulatory agencies about potential pathways for human trials.

The takeaway

This innovative approach to growing functional liver tissue inside the body could provide a much-needed solution to the shortage of donor organs for liver transplants, especially for patients who may not be eligible due to other health conditions. If successful in further testing, the BOOST technique could potentially be adapted for other organs with regenerative capacity as well.