The alternatively spliced domain TnFnIII A1A2 of the extracellular matrix protein tenascin-C suppresses activation-induced T lymphocyte proliferation and cytokine production.

Détails

ID Serval
serval:BIB_7E82D83FE25E
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
The alternatively spliced domain TnFnIII A1A2 of the extracellular matrix protein tenascin-C suppresses activation-induced T lymphocyte proliferation and cytokine production.
Périodique
Journal of Immunology
Auteur(s)
Puente Navazo M.D., Valmori D., Rüegg C.
ISSN
0022-1767 (Print)
ISSN-L
0022-1767
Statut éditorial
Publié
Date de publication
2001
Volume
167
Numéro
11
Pages
6431-6440
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Résumé
Several lines of evidences have suggested that T cell activation could be impaired in the tumor environment, a condition referred to as tumor-induced immunosuppression. We have previously shown that tenascin-C, an extracellular matrix protein highly expressed in the tumor stroma, inhibits T lymphocyte activation in vitro, raising the possibility that this molecule might contribute to tumor-induced immunosuppression in vivo. However, the region of the protein mediating this effect has remained elusive. Here we report the identification of the minimal region of tenascin-C that can inhibit T cell activation. Recombinant fragments corresponding to defined regions of the molecule were tested for their ability to inhibit in vitro activation of human peripheral blood T cells induced by anti-CD3 mAbs in combination with fibronectin or IL-2. A recombinant protein encompassing the alternatively spliced fibronectin type III domains of tenascin-C (TnFnIII A-D) vigorously inhibited both early and late lymphocyte activation events including activation-induced TCR/CD8 down-modulation, cytokine production, and DNA synthesis. In agreement with this, full length recombinant tenascin-C containing the alternatively spliced region suppressed T cell activation, whereas tenascin-C lacking this region did not. Using a series of smaller fragments and deletion mutants issued from this region, we have identified the TnFnIII A1A2 domain as the minimal region suppressing T cell activation. Single TnFnIII A1 or A2 domains were no longer inhibitory, while maximal inhibition required the presence of the TnFnIII A3 domain. Altogether, these data demonstrate that the TnFnIII A1A2 domain mediate the ability of tenascin-C to inhibit in vitro T cell activation and provide insights into the immunosuppressive activity of tenascin-C in vivo.
Mots-clé
Alternative Splicing/immunology, Cytokines/antagonists & inhibitors, Cytokines/biosynthesis, Cytotoxicity, Immunologic/genetics, Cytotoxicity, Immunologic/immunology, Down-Regulation/genetics, Down-Regulation/immunology, Fibronectins/genetics, Fibronectins/physiology, Humans, Immunosuppressive Agents/pharmacology, Lymphocyte Activation/genetics, Lymphocyte Activation/immunology, Peptide Fragments/genetics, Peptide Fragments/physiology, Protein Isoforms/genetics, Protein Isoforms/physiology, Protein Structure, Tertiary/genetics, Receptor-CD3 Complex, Antigen, T-Cell/antagonists & inhibitors, Receptor-CD3 Complex, Antigen, T-Cell/biosynthesis, Recombinant Proteins/genetics, Recombinant Proteins/pharmacology, Repetitive Sequences, Amino Acid/genetics, Repetitive Sequences, Amino Acid/immunology, T-Lymphocytes/immunology, T-Lymphocytes/metabolism, Tenascin/genetics, Tenascin/physiology, Tumor Cells, Cultured
Pubmed
Création de la notice
28/01/2008 9:36
Dernière modification de la notice
03/03/2018 18:41
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