Scientists have shown that pancreatic cells transplanted through the placenta into developing mouse fetuses can successfully integrate into the pancreas after birth. The technique, developed by University of Tsukuba researchers, opens a new window into how transplanted cells behave during fetal development. Future work will explore whether stem cell-derived pancreatic cells can be delivered the same way.
Researchers at the University of Tsukuba have demonstrated a novel intraplacental transplantation method in which pancreatic progenitor cells are injected into the placenta of a pregnant mouse and delivered to the developing fetus. In a new study, cells derived from embryonic pancreatic buds were transplanted into recipient embryos at an early developmental stage, and after birth, donor-derived cells were detected within the pancreas — appearing in regions corresponding to islets, acinar tissue, and ducts.
The team also tested the approach in mice lacking the Pdx1 gene, which is essential for pancreatic development. Some of these deficient recipients showed detectable circulating insulin or transient blood glucose changes, though no organized pancreatic tissue was visible — leaving the source of that insulin an open question. Next steps include testing iPSC-derived pancreatic progenitor cells using the same delivery method.
Key Takeaways:
Why it matters: This research lays early groundwork for regenerative approaches to pancreatic diseases like diabetes, potentially offering a new route to restore insulin-producing cells using stem cell-derived therapies delivered during fetal development.
