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  • Title: Wnt glycoproteins regulate the expression of FoxN1, the gene defective in nude mice.
    Author: Balciunaite G, Keller MP, Balciunaite E, Piali L, Zuklys S, Mathieu YD, Gill J, Boyd R, Sussman DJ, Holländer GA.
    Journal: Nat Immunol; 2002 Nov; 3(11):1102-8. PubMed ID: 12379851.
    Abstract:
    T cell development and selection require the fully mature and diverse epithelial microenvironment of the thymus. Acquisition of these characteristics is dependent on expression of the forkhead (also known as winged-helix) transcription factor FoxN1, as a lack of functional FoxN1 results in aberrant epithelial morphogenesis and an inability to attract lymphoid precursors to the thymus primordium. However, the transcriptional control of Foxn1 expression has not been elucidated. Here we report that secreted Wnt glycoproteins, expressed by thymic epithelial cells and thymocytes, regulate epithelial Foxn1 expression in both autocrine and paracrine fashions. Wnt molecules therefore provide regulatory signals critical for thymic function.
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