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Multipotent stem/progenitor cells in the human foetal biliary tree

Rossella Semeraro1, Guido Carpino, Vincenzo Cardinale

  • 1Department of Medico-Surgical Sciences and Biotechnologies, Polo Pontino, Italy.

Journal of Hepatology
|July 24, 2012
PubMed

Insights

Human fetal biliary trees contain multipotent stem cells. These cells can differentiate into liver and pancreatic cells in vitro and in vivo, offering insights into organogenesis.

Area of Science:

  • Stem cell biology
  • Developmental biology
  • Hepatology and Gastroenterology

Background:

  • The biliary tree, liver, and pancreas share a common embryological origin.
  • Previous studies identified endodermal stem/progenitor cells in adult human extrahepatic biliary trees.
  • This research investigates human fetal biliary trees as a source of multipotent stem/progenitor cells.

Purpose of the Study:

  • To evaluate human fetal biliary trees as sources of stem/progenitor cells.
  • To determine the potential for differentiation into multiple endodermal-derived mature fates.
  • To characterize the developmental trajectory of these stem/progenitor cell populations.

Main Methods:

  • Analysis of cytoplasmic and surface markers for stem cells and progenitors in fetal biliary tree tissues and cells.
  • Assessment of endodermal transcription factors crucial for liver and pancreatic fate determination.
  • In vitro culture expansion and in vivo transplantation experiments in immunodeficient mice.

Main Results:

  • Fetal biliary tree cells demonstrated robust clonogenic proliferation in serum-free medium for over a month.
  • Expanded cells exhibited multipotency, differentiating into hepatocytes, cholangiocytes, and pancreatic islet cells under specific microenvironments.
  • Transplanted fetal biliary tree cells successfully engrafted and differentiated into mature hepatocytes and cholangiocytes in mouse livers.

Conclusions:

  • Human fetal biliary trees harbor multipotent stem/progenitor cells similar to adult populations.
  • These cells are amenable to expansion and in vitro differentiation into liver and pancreatic lineages.
  • In vivo transplantation confirmed their capacity to engraft and mature, supporting their role in lifelong organogenesis.
Abstract

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