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Related Concept Videos

  • Biomedical And Clinical Sciences
  • Oncology And Carcinogenesis
  • Predictive And Prognostic Markers
  • Wnt/beta-catenin Signaling In Murine Hepatic Transit Amplifying Progenitor Cells.
  • Biomedical And Clinical Sciences
  • Oncology And Carcinogenesis
  • Predictive And Prognostic Markers
  • Wnt/beta-catenin Signaling In Murine Hepatic Transit Amplifying Progenitor Cells.

    • Related Experiment Videos

    Wnt/beta-catenin signaling in murine hepatic transit amplifying progenitor cells.

    Min Hu1, Masashi Kurobe, Yeon Jun Jeong

    • 1Department of Surgery, Stanford University School of Medicine, Stanford, California, USA.

    Gastroenterology
    |November 7, 2007

    View abstract on PubMed

    Summary
    This summary is machine-generated.

    Wnt signaling activates hepatic oval cells, which are liver progenitor cells, during chronic liver injury. This activation involves beta-catenin and promotes cell-cycle entry, offering insights into liver regeneration.

    Related Experiment Videos

    Area of Science:

    • Hepatology
    • Stem Cell Biology
    • Molecular Biology

    Background:

    • Oval cells are postnatal hepatic progenitors with significant proliferative and bipotent differentiation potential.
    • Wnt/beta-catenin signaling is a critical pathway in liver development and regeneration.

    Purpose of the Study:

    • To investigate the role of Wnt signaling in oval cells during chronic liver injury.
    • To determine if Wnt signaling influences oval cell proliferation and activation.

    Main Methods:

    • Utilized a 3,5-diethoxycarbonyl-1,4-dihydrocollidine (DDC)-induced mouse model of chronic liver injury.
    • Assessed Wnt family gene expression and beta-catenin signaling in oval cells using quantitative RT-PCR, in situ hybridization, TOPGAL reporter mice, and immunohistochemistry.

    Main Results:

    • Wnt ligands were significantly induced in DDC-fed mice livers, localizing to proliferating oval cells.
    • Oval cells exhibited nuclear beta-catenin and cell-cycle entry in response to Wnt3a in vitro.
    • Wnt3a stimulation led to beta-catenin/T-cell factor/lymphoid enhancer factor (TCF/LEF) transcriptional activation.

    Conclusions:

    • Oval cells respond to Wnt ligands with increased beta-catenin activity and cell-cycle entry.
    • Canonical Wnt/beta-catenin/TCF signaling is active in proliferating hepatic progenitor oval cells in vivo.
    • These findings suggest Wnt signaling's role in liver injury and regeneration.