期刊
NATURE IMMUNOLOGY
卷 8, 期 2, 页码 137-144出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ni1436
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- Wellcome Trust [071534] Funding Source: Medline
A fundamental issue in T cell development is what controls whether a thymocyte differentiates into gamma delta T cell or an alpha beta T cell, each defined by their distinct T cell receptor. Most likely, lessons learned in studying that issue will also provide insight into how the thymus produces T cell subsets with distinct functional and regulatory potentials. Here we review recent experiments, focusing on three factors that regulate thymocyte differentiation up to and including the expression of the first products of antigen receptor gene rearrangements. Those factors are the archetypal developmental regulator Notch, intrinsic signals emanating from antigen-receptor complexes, and trans conditioning, which reflects communication between different subsets of thymocytes. We also review new findings on the positive selection of gamma delta T cells and on extrathymic T cell development.
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