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    Loss of the Wnt receptor frizzled 7 in the mouse gastric epithelium is deleterious and triggers rapid repopulation in vivo

    Access Status
    Open access via publisher
    Authors
    Flanagan, D.
    Barker, N.
    Nowell, C.
    Clevers, H.
    Ernst, M.
    Phesse, T.
    Vincan, Elizabeth
    Date
    2017
    Type
    Journal Article
    
    Metadata
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    Citation
    Flanagan, D. and Barker, N. and Nowell, C. and Clevers, H. and Ernst, M. and Phesse, T. and Vincan, E. 2017. Loss of the Wnt receptor frizzled 7 in the mouse gastric epithelium is deleterious and triggers rapid repopulation in vivo. DMM Disease Models and Mechanisms. 10 (8): pp. 971-980.
    Source Title
    DMM Disease Models and Mechanisms
    DOI
    10.1242/dmm.029876
    ISSN
    1754-8403
    School
    School of Biomedical Sciences
    URI
    http://hdl.handle.net/20.500.11937/56849
    Collection
    • Curtin Research Publications
    Abstract

    The gastric epithelium consists of tubular glandular units, each containing several differentiated cell types, and populations of stem cells, which enable the stomach to secrete the acid, mucus and various digestive enzymes required for its function. Very little is known about which cell signalling pathways are required for homeostasis of the gastric epithelium. Many diseases, such as cancer, arise as a result of deregulation of signalling pathways that regulate homeostasis of the diseased organ. Therefore, it is important to understand the biology of how normal conditions are maintained in a tissue to help inform the mechanisms driving disease in that same tissue, and to identify potential points of therapeutic intervention. Wnt signalling regulates several cell functions, including proliferation, differentiation and migration, and plays a crucial role during homeostasis of several tissues, including the intestinal epithelium. Wnt3a is required in the culture medium of gastric organoids, suggesting it is also important for the homeostasis of the gastric epithelium, but this has not been investigated in vivo. Here, we show that the Wnt receptor frizzled 7 (Fzd7), which is required for the homeostasis of the intestine, is expressed in the gastric epithelium and is required for gastric organoid growth. Gastric-specific loss of Fzd7 in the adult gastric epithelium of mice is deleterious and triggers rapid epithelial repopulation, which we believe is the first observation of this novel function for this tissue. Taken together, these data provide functional evidence of a crucial role for Wnt signalling, via the Fzd7 receptor, during homeostasis of the gastric epithelium.

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