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Tim-1 stimulation of dendritic cells regulates the balance between effector and regulatory T cells.
- Source :
-
European journal of immunology [Eur J Immunol] 2011 Jun; Vol. 41 (6), pp. 1539-49. Date of Electronic Publication: 2011 May 25. - Publication Year :
- 2011
-
Abstract
- We show that the T-cell immunoglobalin mucin, Tim-1, initially reported to be expressed on CD4(+) T cells, is constitutively expressed on dendritic cells (DCs) and that its expression further increases after DC maturation. Tim-1 signaling into DCs upregulates costimulatory molecule expression and proinflammatory cytokine production, thereby promoting effector T-cell responses, while inhibiting Foxp3(+) Treg responses. By contrast, Tim-1 signaling in T cells only regulates Th2 responses. Using a high-avidity/agonistic anti-Tim-1 antibody as a co-adjuvant enhances the immunogenic function of DCs, decreases the suppressive function of Tregs, and substantially increases proinflammatory Th17 responses in vivo. The treatment with high- but not low-avidity anti-Tim-1 not only worsens experimental autoimmune encephalomyelitis (EAE) in susceptible mice but also breaks tolerance and induces EAE in a genetically resistant strain of mice. These findings indicate that Tim-1 has an important role in regulating DC function and thus shifts the balance between effector and regulatory T cells towards an enhanced immune response. By understanding the mechanisms by which Tim-1 regulates DC and T-cell responses, we may clarify the potential utility of Tim-1 as a target of therapy against autoimmunity, cancer, and infectious diseases.<br /> (Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)
- Subjects :
- Animals
Antibodies, Monoclonal metabolism
Cells, Cultured
Dendritic Cells immunology
Dendritic Cells pathology
Forkhead Transcription Factors genetics
Forkhead Transcription Factors metabolism
Hepatitis A Virus Cellular Receptor 1
Immunization
Interleukin-17 genetics
Interleukin-17 metabolism
Lymphocyte Activation
Membrane Proteins immunology
Mice
Mice, Transgenic
Myelin Proteolipid Protein immunology
Peptide Fragments immunology
Receptors, Antigen, T-Cell, alpha-beta genetics
Signal Transduction immunology
T-Lymphocyte Subsets immunology
T-Lymphocyte Subsets pathology
T-Lymphocytes, Regulatory immunology
T-Lymphocytes, Regulatory pathology
Th1-Th2 Balance
Dendritic Cells metabolism
Encephalomyelitis, Autoimmune, Experimental immunology
Membrane Proteins metabolism
T-Lymphocyte Subsets metabolism
T-Lymphocytes, Regulatory metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1521-4141
- Volume :
- 41
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- European journal of immunology
- Publication Type :
- Academic Journal
- Accession number :
- 21469101
- Full Text :
- https://doi.org/10.1002/eji.201040993