Integrated morphogen signal inputs in gammadelta versus alphabeta T-cell differentiation
Graduate School of Biomedical Sciences; Department of Pathology
Medical Subject Headings
Animals; Cell Differentiation; Cell Lineage; *Gene Expression Regulation; Hedgehog Proteins; Humans; *Models, Immunological; Receptors, Antigen, T-Cell, alpha-beta; Receptors, Antigen, T-Cell, gamma-delta; Signal Transduction; T-Lymphocyte Subsets; Thymus Gland; Transforming Growth Factors; Wnt Proteins
Life Sciences | Medicine and Health Sciences
Morphogens, a class of secreted proteins that regulate gene expression in a concentration-dependent manner, are responsible for directing nearly all lineage fate choices during embryogenesis. In the thymus, morphogen signal pathways consisting of WNT, Hedgehog, and the transforming growth factor-beta superfamily are active and have been implicated in various developmental processes including proliferation, survival, and differentiation of maturing thymocytes. Intriguingly, it has been inferred that some of these morphogen signal pathways differentially affect gammadelta and alphabeta T-cell development or maintenance, but their role in T-cell lineage commitment has not been directly probed. We have recently identified a modulator of morphogen signaling that significantly influences binary gammadelta versus alphabeta T-cell lineage diversification. In this review, we summarize functions of morphogens in the thymus and provide a highly speculative model of integrated morphogen signals, potentially directing the gammadelta versus alphabeta T-cell fate determination process.
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Citation: Immunol Rev. 2007 Feb;215:32-45. Link to article on publisher's site
Melichar, Heather J. and Kang, Joonsoo, "Integrated morphogen signal inputs in gammadelta versus alphabeta T-cell differentiation" (2007). GSBS Student Publications. 848.