Wnt signaling in the thymus - PubMed (original) (raw)
Review
Wnt signaling in the thymus
Frank J T Staal et al. Curr Opin Immunol. 2003 Apr.
Abstract
Wnt proteins are secreted signaling molecules that regulate cell-to-cell interactions during embryogenesis in many different tissues and species. Wnt signaling is required for normal thymocyte development, most dramatically at the pro-T-cell stage, although recent reports also indicate a role for Wnt proteins in later stages of thymocyte differentiation. The Wnt cascade induces the interaction of the normally cytoplasmic cofactor beta-catenin with the nuclear Tcf and Lef transcription factors. Active Wnt signaling is an absolute requirement for T-cell development, as demonstrated by the complete block in thymocyte development observed in the absence of Tcf1 and Lef1, or in the presence of extracellular Wnt inhibitors.
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