Letter | Published:

CD69 acts downstream of interferon-α/β to inhibit S1P1 and lymphocyte egress from lymphoid organs

Nature volume 440, pages 540544 (23 March 2006) | Download Citation

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Abstract

Naive lymphocytes continually enter and exit lymphoid organs in a recirculation process that is essential for immune surveillance. During immune responses, the egress process can be shut down transiently1. When this occurs locally it increases lymphocyte numbers in the responding lymphoid organ; when it occurs systemically it can lead to immunosuppression as a result of the depletion of recirculating lymphocytes. Several mediators of the innate immune system are known to cause shutdown, including interferon α/β (IFN-α/β) and tumour necrosis factor2,3,4,5, but the mechanism has been unclear. Here we show that treatment with the IFN-α/β inducer polyinosine polycytidylic acid (hereafter ‘poly(I:C)’) inhibited egress by a mechanism that was partly lymphocyte-intrinsic. The transmembrane C-type lectin CD69 was rapidly induced and CD69-/- cells were poorly retained in lymphoid tissues after treatment with poly(I:C) or infection with lymphocytic choriomeningitis virus. Lymphocyte egress requires sphingosine 1-phosphate receptor-1 (S1P1), and IFN-α/β was found to inhibit lymphocyte responsiveness to S1P. By contrast, CD69-/- cells retained S1P1 function after exposure to IFN-α/β. In coexpression experiments, CD69 inhibited S1P1 chemotactic function and led to downmodulation of S1P1. In a reporter assay, S1P1 crosslinking led to co-crosslinking and activation of a CD69–CD3ζ chimaera. CD69 co-immunoprecipitated with S1P1 but not the related receptor, S1P3. These observations indicate that CD69 forms a complex with and negatively regulates S1P1 and that it functions downstream of IFN-α/β, and possibly other activating stimuli, to promote lymphocyte retention in lymphoid organs.

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Acknowledgements

We thank T. Nakayama and S. Zeigler for CD69-/- mice; K. Murali-Krishna for Ifnar1-/- mice; R. Proia for S1p1+/- mice; S. Jahn for technical assistance; C. Allen, S. Schwab and C. McArthur for help with cell sorting; K. Kabashima for fetal liver chimeras; O. Lam for mouse husbandry; and S. Schwab and C. Lo for comments on the manuscript. L.R.S. is supported by the UCSF Medical Scientist Training Program; D.B.R. is supported by the Genentech Graduate Fellowship; M.M. was supported by the Pfizer Postdoctoral Fellowship in Immunology and Rheumatology, a research award from the Arthritis Foundation, the Rosalind Russell Medical Research Center for Arthritis at UCSF, and the Sandler Family Supporting Foundation; L.L.L. is an American Cancer Society Research Professor; J.G.C. is an Investigator of the Howard Hughes Medical Institute. This work was supported in part by grants from the NIH (to L.L.L. and J.G.C.).

Author information

Affiliations

  1. Howard Hughes Medical Institute,

    • Lawrence R. Shiow
    • , Ying Xu
    • , Jinping An
    •  & Jason G. Cyster
  2. Department of Microbiology and Immunology,

    • Lawrence R. Shiow
    • , David B. Rosen
    • , Ying Xu
    • , Jinping An
    • , Lewis L. Lanier
    •  & Jason G. Cyster
  3. Department of Medicine, and

    • Naděžda Brdičková
    •  & Mehrdad Matloubian
  4. Biomedical Sciences Graduate Program, University of California, San Francisco, San Francisco, California 94143, USA

    • Lawrence R. Shiow
    •  & David B. Rosen

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Reprints and permissions information is available at npg.nature.com/reprintsandpermissions. The authors declare no competing financial interests.

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Correspondence to Jason G. Cyster or Mehrdad Matloubian.

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https://doi.org/10.1038/nature04606

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