Abstract
The migration patterns of naive and activated T cells are associated with the expression of distinct sets of chemokine receptors, but the molecular basis for this regulation is unknown. Here we identify Krupple-like factor 2 (KLF2) as a key transcriptional factor needed to prevent naive T cells from expressing inflammatory chemokine receptors and acquiring the migration patterns of activated T cells. Lineage-specific deletion of KLF2 resulted in fewer naive T cells in the blood and secondary lymphoid organs, whereas it expanded naive T cell numbers in nonlymphoid tissues; these effects were associated with altered expression of inflammatory chemokine receptors on naive T cells. KLF2 repressed the expression of several chemokine receptors, including CCR3 and CCR5. We thus conclude that KLF2 maintains proper T cell migration patterns by linking T cell movement and transcriptional regulation of chemokine receptor expression patterns.
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Acknowledgements
We thank J. Cyster and M. Zachariah for assistance with anti-S1P1 staining and for comments on the manuscript; T. Graf (Albert Einstein College of Medicine) for the use of Vav-Cre–transgenic mice; and G. Koretzky, J. Maltzman and B. Kleaveland for insights. The plasmid pcDNA-HA-KLF2 was a gift from laboratory of L.H. Glimcher (Harvard School of Public Health).
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E.S. designed and did experiments and wrote the manuscript; Z.Z., J.S.L. and T.W. designed and did experiments; and M.L.K. designed experiments and wrote the manuscript.
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Sebzda, E., Zou, Z., Lee, J. et al. Transcription factor KLF2 regulates the migration of naive T cells by restricting chemokine receptor expression patterns. Nat Immunol 9, 292–300 (2008). https://doi.org/10.1038/ni1565
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DOI: https://doi.org/10.1038/ni1565