Trauma patients' elevated tumor necrosis related apoptosis inducing ligand (TRAIL) contributes to increased T cell apoptosis

Copyright © 2012 Elsevier Inc. All rights reserved.

Bibliographische Detailangaben
Veröffentlicht in:Clinical immunology (Orlando, Fla.). - 1999. - 145(2012), 1 vom: 28. Okt., Seite 44-54
1. Verfasser: Bandyopadhyay, Gautam (VerfasserIn)
Weitere Verfasser: Bankey, Paul E, Miller-Graziano, Carol L
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2012
Zugriff auf das übergeordnete Werk:Clinical immunology (Orlando, Fla.)
Schlagworte:Journal Article Research Support, N.I.H., Extramural CD47 Antigen CD47 protein, human Enzyme Inhibitors NF-kappa B Recombinant Proteins TNF-Related Apoptosis-Inducing Ligand TNFSF10 protein, human Thrombospondin 1 mehr... PTPN6 protein, human EC 3.1.3.48 Protein Tyrosine Phosphatase, Non-Receptor Type 6 Caspase 10 EC 3.4.22.- CASP10 protein, human EC 3.4.22.63
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245 1 0 |a Trauma patients' elevated tumor necrosis related apoptosis inducing ligand (TRAIL) contributes to increased T cell apoptosis 
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520 |a Immunosuppression resulting from excessive post-trauma apoptosis of hyperactivated T cells is controversial. TRAIL mediated T cell apoptosis decreases highly activated T cells' responses. Caspase-10, a particular TRAIL target, was increased in trauma patients' T cells with concomitantly elevated plasma TRAIL levels. These patients' T cells developed anergy, implicating increased TRAIL-mediated T cell apoptosis in post-trauma T cell anergy. Control T cells cultured with patients' sera containing high TRAIL levels increased their caspase-10 activity and apoptosis. Stimulated primary T cells are TRAIL apoptosis resistant. Increased plasma thrombospondin-1 and T cell expression of CD47, a thrombospondin-1 receptor, preceded patients' T cell anergy. CD47 triggering of T cells increased their sensitivity to TRAIL-induced apoptosis. Augmentation of T cell TRAIL-induced apoptosis was secondary to CD47 triggered activation of the Src homology-containing phosphatase-1 (SHP-1) and was partially blocked by a SHP-1 inhibitor. We suggest that combined post-trauma CD47 triggering, SHP-1 mediated NFκB suppression, and elevated TRAIL levels increase patients' CD47 expressing T cell apoptosis, thus contributing to subsequent T cell anergy 
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650 7 |a NF-kappa B  |2 NLM 
650 7 |a Recombinant Proteins  |2 NLM 
650 7 |a TNF-Related Apoptosis-Inducing Ligand  |2 NLM 
650 7 |a TNFSF10 protein, human  |2 NLM 
650 7 |a Thrombospondin 1  |2 NLM 
650 7 |a PTPN6 protein, human  |2 NLM 
650 7 |a EC 3.1.3.48  |2 NLM 
650 7 |a Protein Tyrosine Phosphatase, Non-Receptor Type 6  |2 NLM 
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650 7 |a CASP10 protein, human  |2 NLM 
650 7 |a EC 3.4.22.63  |2 NLM 
700 1 |a Bankey, Paul E  |e verfasserin  |4 aut 
700 1 |a Miller-Graziano, Carol L  |e verfasserin  |4 aut 
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