Abstract
The presence of immune memory at pathogen-entry sites is a prerequisite for protection. Nevertheless, the mechanisms that warrant immunity at peripheral interfaces are not understood. Here we show that the nonclassical major histocompatibility complex (MHC) class I molecule thymus leukemia antigen (TL), induced on dendritic cells interacting with CD8αα on activated CD8αβ+ T cells, mediated affinity-based selection of memory precursor cells. Furthermore, constitutive expression of TL on epithelial cells led to continued selection of mature CD8αβ+ memory T cells. The memory process driven by TL and CD8αα was essential for the generation of CD8αβ+ memory T cells in the intestine and the accumulation of highly antigen-sensitive CD8αβ+ memory T cells that form the first line of defense at the largest entry port for pathogens.
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Acknowledgements
We thank M.J. Bevan (University of Washington) for LM-N4 and LM-Q4; E. Stockert and L. Old (Memorial Sloan-Kettering) for anti-TL (HD168); M. Cheroutre for contributions; L. Qiao, X.Z. Wang and members of the Cheroutre and Kronenberg laboratories for discussions and technical assistance; and D. Littman (New York University School of Medicine) for ΔE8I mice. Supported by the US National Institutes of Health (R01 AI064584 and R01 AI050265 to H.C.; R01 AG10152 to M.K. and H.C.; and CA009385 to D.O.-V.), the Vanderbilt University Digestive Disease Research Center and the Vanderbilt-Meharry Center for AIDS Research (L.V.K.), the Austrian Science Fund (Project S9308-B05 to B.G.-L.) and the Austrian Federal Ministry of Science and Research (Future Leaders of Ageing Research in Europe; D.H.-B.). This is manuscript 1063 from the La Jolla Institute for Allergy & Immunology.
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Y.H. and Y.P., conceptual development and execution of the studies and preparation of the manuscript; Y.W.-Z., A.L., R.A. and I.B., technical assistance and input into data analyses; D.O.-V. and L.V.K., generation of TL-deficient mice; M.A.T., generation and backcrossing of TL-transgenic mice; D.H.-B. and B.G.-L., experiments with human samples; N.A., mice with mutation in the sequence encoding IL-7Rα Y449XXM; S.P.S., help with in vitro culture experiments; M.K., participation in discussions of the data and preparation of the manuscript; H.C., conception of ideas, generation of TL transgenic mice with the assistance of M.A.T., manuscript authorship and experiment supervision.
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Huang, Y., Park, Y., Wang-Zhu, Y. et al. Mucosal memory CD8+ T cells are selected in the periphery by an MHC class I molecule. Nat Immunol 12, 1086–1095 (2011). https://doi.org/10.1038/ni.2106
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DOI: https://doi.org/10.1038/ni.2106
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