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Multipotent stem/progenitor cells in the human foetal biliary tree.

Abstract：

BACKGROUND & AIMS:Biliary tree, liver, and pancreas share a common embryological origin. We previously demonstrated the presence of stem/progenitor cells of endodermal origin in the adult human extrahepatic biliary tree. This study evaluated the human foetal biliary trees as sources of stem/progenitor cells of multiple endodermal-derived mature fates. METHODS:Human foetal intrahepatic and extrahepatic biliary tree tissues and isolated cells were tested for cytoplasmic and surface markers of stem cells and committed progenitors, as well as endodermal transcription factors requisite for a liver versus pancreatic fate. In vitro and in vivo experiments were conducted to evaluate the potential mature fates of differentiation. RESULTS:Foetal biliary tree cells proliferated clonogenically for more than 1 month on plastic in a serum-free Kubota medium. After culture expansion, cells exhibited multipotency and could be restricted to certain lineages under defined microenvironments, including hepatocytes, cholangiocytes, and pancreatic islet cells. Transplantation of foetal biliary tree cells into the livers of immunodeficient mice resulted in effective engraftment and differentiation into mature hepatocytes and cholangiocytes. CONCLUSIONS:Foetal biliary trees contain multipotent stem/progenitor cells comparable with those in adults. These cells can be easily expanded and induced in vitro to differentiate into liver and pancreatic mature fates, and engrafted and differentiated into mature cells when transplanted in vivo. These findings further characterise the development of these stem/progenitor cell populations from foetuses to adults, which are thought to contribute to liver and pancreas organogenesis throughout life.

journal_name

J Hepatol

journal_title

Journal of hepatology

authors

Semeraro R,Carpino G,Cardinale V,Onori P,Gentile R,Cantafora A,Franchitto A,Napoli C,Anceschi M,Brunelli R,Bosco D,Torrice A,Reid L,Gaudio E,Alvaro D

doi

10.1016/j.jhep.2012.07.013

subject

Has Abstract

pub_date

2012-11-01 00:00:00

pages

987-94

issue

5

eissn

0168-8278

issn

1600-0641

pii

S0168-8278(12)00571-5

journal_volume

57

pub_type

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