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MIT Team Injects 'Satellite Livers' That Function for Eight Weeks in Mice

Hydrogel microspheres create an engineered niche that localizes hepatocytes, enabling rapid vascular integration.

Overview

  • In a Cell Biomaterials paper released today, MIT researchers report mouse grafts that maintained viability and liver protein output for the full eight‑week study window.
  • The approach mixes hepatocytes with uniform hydrogel microspheres and supportive fibroblasts to form compact, stable structures after syringe delivery.
  • Injected into perigonadal adipose tissue, the grafts became vascularized as host blood vessels grew into the site, supporting sustained cell function.
  • Ultrasound guided precise placement and allowed noninvasive monitoring, with researchers noting potential delivery to sites such as the spleen or near the kidneys.
  • The team frames the technology as a possible non‑surgical alternative or bridge to transplant, while acknowledging hurdles including immune rejection, durability, and scaling to human use.