RRC ID 5570
Author Zong Y, Panikkar A, Xu J, Antoniou A, Raynaud P, Lemaigre F, Stanger BZ.
Title Notch signaling controls liver development by regulating biliary differentiation.
Journal Development
Abstract In the mammalian liver, bile is transported to the intestine through an intricate network of bile ducts. Notch signaling is required for normal duct formation, but its mode of action has been unclear. Here, we show in mice that bile ducts arise through a novel mechanism of tubulogenesis involving sequential radial differentiation. Notch signaling is activated in a subset of liver progenitor cells fated to become ductal cells, and pathway activation is necessary for biliary fate. Notch signals are also required for bile duct morphogenesis, and activation of Notch signaling in the hepatic lobule promotes ectopic biliary differentiation and tubule formation in a dose-dependent manner. Remarkably, activation of Notch signaling in postnatal hepatocytes causes them to adopt a biliary fate through a process of reprogramming that recapitulates normal bile duct development. These results reconcile previous conflicting reports about the role of Notch during liver development and suggest that Notch acts by coordinating biliary differentiation and morphogenesis.
Volume 136(10)
Pages 1727-39
Published 2009-5
DOI 10.1242/dev.029140
PII dev.029140
PMID 19369401
PMC PMC2673761
MeSH Animals Animals, Newborn Antigens, Differentiation / metabolism Bile Ducts / cytology Bile Ducts / embryology* Bile Ducts / growth & development* Cell Differentiation / physiology Hepatocytes / cytology Liver / cytology Liver / embryology* Liver / growth & development* Mice Mice, Mutant Strains Morphogenesis Receptors, Notch / physiology* Signal Transduction / physiology*
IF 5.763
Times Cited 178