Impaired Initiation of Contact Hypersensitivity by FTY720

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Impaired Initiation of Contact Hypersensitivity by FTY720 Daiki Nakashima, Kenji Kabashima, Jun-ichi Sakabe, Kazunari Sugita, Takashi Kobayashi, Ryutaro Yoshiki, Yoshiki Tokura Journal of Investigative Dermatology Volume 128, Issue 12, Pages 2833-2841 (December 2008) DOI: 10.1038/jid.2008.174 Copyright © 2008 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 1 Effect of FTY720 on CHS response. (a) B6 mice were sensitized with DNFB on the abdominal skin and challenged with DNFB on the ears 5 days later. FTY720 was administered 12hours before sensitization (-0.5 days (d)), elicitation (+4.5 days), or both (-0.5d/+4.5d), and the change in ear thickness after challenge was measured. Columns show the mean±SD from at least four mice per group. Student's t-test was performed between the indicated groups and *P<0.05. (b) Histology of the skin 24hours after challenge. The ears of mice after sensitization and elicitation with (right panel) or without (center panel) FTY720 treatment before sensitization are shown. The ears of mice that were not sensitized are shown as a control (left panel). Scale bar=100μm. Data are from three independent experiments. (c) B6 mice were sensitized with DNFB on the abdominal skin, and challenged with DNFB on the ears 5, 10, and 14 days later. FTY720 was administered 12hours before challenge (+4.5d, +9.5d, and 14.5d). Columns show the mean±SD from at least four mice per group. Journal of Investigative Dermatology 2008 128, 2833-2841DOI: (10.1038/jid.2008.174) Copyright © 2008 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 2 CHS response induced by adoptive transfer. (a) Attenuated CHS response in recipients adoptively transferred with FTY720-treated sensitized T cells. Lymphocytes were isolated and pooled from lymph nodes of DNFB-sensitized B6 donors with or without FTY720 treatment and adoptively transferred into B6 naive recipients. The recipient mice were challenged with DNFB and the change in ear thickness is shown. (b) Intact CHS response in recipients adoptively transferred with sensitized B6T cells. Lymphocytes were isolated and pooled from lymph nodes of DNFB-sensitized B6 donors and adoptively transferred into B6 naive recipients pretreated with or without FTY720. The recipient mice were challenged with DNFB and the change in ear thickness is shown in panels a and b. Columns show the mean±SD from five mice per group. Student's t-test was performed between the indicated groups. *P<0.05. Data are from three independent experiments. Journal of Investigative Dermatology 2008 128, 2833-2841DOI: (10.1038/jid.2008.174) Copyright © 2008 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 3 Influence of FTY720 on migration and maturation of cutaneous DCs. (a–d) B6 mice were pretreated with or without FTY720, and their abdominal skin was painted with FITC 12hours later. The draining lymph node cells were collected 24hours after FITC application and analyzed with flowcytometry (a). The FITC+ CD11c+ cells (b), FITC+ MHC class II+ cells (c), FITC+ CD86+ cells (d), and Langerin+ Langerhans cells (e) per mouse were enumerated (unpaired Student's t-test; n=5 per group). As a control, mice not painted with FITC were prepared (b–d). Journal of Investigative Dermatology 2008 128, 2833-2841DOI: (10.1038/jid.2008.174) Copyright © 2008 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 4 Effect of FTY720 on T-cell stimulatory capacity of cutaneous DCs. DNFB-sensitized Thy1.2+ T cells were sorted from draining lymph nodes 5 days after DNFB application and incubated with or without CD11c+ DCs prepared from draining lymph nodes 1 day after DNFB application with or without FTY720 treatment. Cell proliferation was measured by 3H-thymidine incorporation. d.p.m., decay per minute. When DCs without hapten pretreatment were added in this assay, the enhancement of T-cell proliferation was marginal (<2000d.p.m.). Columns show the mean±SD from three independent experiments. Journal of Investigative Dermatology 2008 128, 2833-2841DOI: (10.1038/jid.2008.174) Copyright © 2008 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 5 Numerical alternations of naive, central, and effector memory T cells in the blood following FTY720 administration. FTY720 was administered to B6 mice, and peripheral blood was periodically collected. Lymphocytes were stained with mAbs to CD4 and CD44 and analyzed by flow cytometry (a). The numbers of naive (b), central memory, (c) and effector memory T cells (d) per milliliter of blood were determined. Columns show the mean±SD from four mice per group. Student's t-test was performed between the indicated groups. *P<0.05. Data are from three independent experiments. Journal of Investigative Dermatology 2008 128, 2833-2841DOI: (10.1038/jid.2008.174) Copyright © 2008 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 6 Numerical alternations of naive, central, and effector memory T cells in the lymph nodes following FTY720 administration. FTY720 was administered to B6 mice, and skin-draining (inguinal and axillary) lymph nodes were periodically collected. The numbers of naive (a), central memory (b), and effector memory T cells (c) per mouse were determined. Columns show the mean±SD from four or five mice per group. Student's t-test was performed between the indicated groups, but no statistically significant difference (P<0.05) compared with the FTY720-nontreated group was detected. Data are from two independent experiments. Journal of Investigative Dermatology 2008 128, 2833-2841DOI: (10.1038/jid.2008.174) Copyright © 2008 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 7 Chemotactic response to S1P in T-cell subsets. (a–c) Inguinal, axillary, and brachial lymph node cells were prepared from B6 mice. Input cells and cells that migrated to the lower well of a transwell chamber in the absence of S1P or in response to 1, 10, 100, or 1000nM S1P were analyzed by flow cytometry. The percentage (%) input of naive (a), central memory (b), and effector memory (c) T cells was determined. Bars represent means±SD of triplicated transwells, and data are from three independent experiments. Student's t-test was performed between the indicated groups. *P<0.05. Journal of Investigative Dermatology 2008 128, 2833-2841DOI: (10.1038/jid.2008.174) Copyright © 2008 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 8 Quantitative PCR analysis of S1P1 mRNA from T-cell subset. Lymph node cells from B6 mice 5 days after sensitization with DNFB were sorted into CD4+ CD44− CD62L+ naive, CD4+ CD44+ CD62L+ central memory, and CD4+ CD44+ CD62L− effector memory T cells. The amounts of S1P1 mRNA were expressed as relative amount of mRNA normalized to β-actin, and S1P1 mRNA of naive T cells were set to 1. Data are from three independent experiments. Journal of Investigative Dermatology 2008 128, 2833-2841DOI: (10.1038/jid.2008.174) Copyright © 2008 The Society for Investigative Dermatology, Inc Terms and Conditions