alexa The hepatic stem cell niche: identification by label-retaining cell assay.
Molecular Biology

Molecular Biology

Cell & Developmental Biology

Author(s): Kuwahara R, Kofman AV, Landis CS, Swenson ES, Barendswaard E,

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Abstract Label retention assays remain the state-of-the-art approach to identify the location of intraorgan epithelial stem cell niches, in situ and in vivo. They are commonly used in organs with rapid cell turnover but have not been applied to the liver, where cell turnover is very slow. We used a sublethal dose of acetaminophen administered coincident with bromodeoxyuridine to load possible hepatic stem cells in mice with label and then administered a second, sublethal chase of acetaminophen to accomplish "washout" of label from transit amplifying cell populations. CONCLUSION: Four possible hepatic stem cell niches are identified by this approach: the canal of Hering (proximal biliary tree), intralobular bile ducts, periductal "null" mononuclear cells, and peribiliary hepatocytes. These results confirm several different and often contradictory lines of investigation regarding the intrahepatic location of stem/progenitor cells and suggest that the liver has a multi-tiered, flexible system of regeneration rather than a single stem/progenitor cell location.
This article was published in Hepatology and referenced in Cell & Developmental Biology

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