Abstract:
:The DC-derived chemokine CCL17, a ligand of CCR4, has been shown to promote various inflammatory diseases such as atopic dermatitis, atherosclerosis, and inflammatory bowel disease. Under steady-state conditions, and even after systemic stimulation with LPS, CCL17 is not expressed in resident splenic DCs as opposed to CD8α⁻CD11b⁺ LN DCs, which produce large amounts of CCL17 in particular after maturation. Upon systemic NKT cell activation through α-galactosylceramide stimulation however, CCL17 can be upregulated in both CD8α⁻ and CD8α⁺ splenic DC subsets and enhances cross-presentation of exogenous antigens. Based on genome-wide expression profiling, we now show that splenic CD11b⁺ DCs are susceptible to IFN-γ-mediated suppression of CCL17, whereas LN CD11b⁺CCL17⁺ DCs downregulate the IFN-γR and are much less responsive to IFN-γ. Under inflammatory conditions, particularly in the absence of IFN-γ signaling in IFN-γRKO mice, CCL17 expression is strongly induced in a major proportion of splenic DCs by the action of GM-CSF in concert with IL-4. Our findings demonstrate that the local cytokine milieu and differential cytokine responsiveness of DC subsets regulate lymphoid organ specific immune responses at the level of chemokine expression.
journal_name
Eur J Immunoljournal_title
European journal of immunologyauthors
Globisch T,Steiner N,Fülle L,Lukacs-Kornek V,Degrandi D,Dresing P,Alferink J,Lang R,Pfeffer K,Beyer M,Weighardt H,Kurts C,Ulas T,Schultze JL,Förster Idoi
10.1002/eji.201343820subject
Has Abstractpub_date
2014-02-01 00:00:00pages
500-10issue
2eissn
0014-2980issn
1521-4141journal_volume
44pub_type
杂志文章abstract::Traumatic brain injury (TBI) elicits innate inflammatory responses that can lead to secondary brain injury. To better understand the mechanisms involved in TBI-induced inflammation, we examined the nature of macrophages responding to TBI in mice. In this model, brain macrophages were increased >20-fold the day after i...
journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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doi:10.1002/eji.1830250545
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journal_title:European journal of immunology
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doi:10.1002/eji.1830200934
更新日期:1990-09-01 00:00:00
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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abstract::Toll-like receptors (TLRs) play a major part in providing innate immunity against pathogenic microorganisms. Recent studies show that these receptors are also expressed on T cells, which are the sentinels of adaptive immunity. Here, we have investigated the regulatory role of the T-cell receptor in the functioning of ...
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