Abstract
The thymus is an organ that generates and educates T cells, supplying T subsets that ensure adaptive immunity and self-tolerance. Intrathymic positive selection of T cells with further post-thymic maturation and signaling provided by peripheral antigen-presenting cells (APCs) sustains a functional and regulated T cell pool. Intrathymic negative selection and generation of natural regulatory T cells (Tregs) in the thymus are essential to contain T cell autoimmunity. Humanized mouse models provide a unique opportunity to investigate these processes and their underlying mechanisms. Humanized mice can be generated by injecting human hematopoietic stem cells, with or without cotransplantation of fetal thymic tissue, to immunodeficient mice. Human thymopoiesis and T cell development in the former and latter models occur in the recipient mouse thymus and human thymic grafts, respectively. In this chapter, we summarize information on human T cell development, post-thymic interactions between T cells and APCs, as well as mechanisms maintaining tolerance that has been learned from these humanized mouse models.
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Acknowledgments
We thank Shavree Washington for assistance with the manuscript. The work of the authors discussed in this chapter was supported by the following NIH grants: RO1AI084074 (to Sykes), RC1HL100117 and R01 AI064569 (to Yang) and P01AI045897 (to Sykes and Yang) and JDRF grant 1-2007-1057 (to Sykes).
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Li, H., Yang, YG., Sykes, M. (2014). Thymic Education of Human T Cells and Regulatory T Cell Development in Humanized Mice. In: Poluektova, L., Garcia, J., Koyanagi, Y., Manz, M., Tager, A. (eds) Humanized Mice for HIV Research. Springer, New York, NY. https://doi.org/10.1007/978-1-4939-1655-9_11
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DOI: https://doi.org/10.1007/978-1-4939-1655-9_11
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