scholarly journals Human Dendritic Cells Stimulated via TLR7 and/or TLR8 Induce the Sequential Production of Il-10, IFN-γ, and IL-17A by Naive CD4+ T Cells

2009 ◽  
Vol 182 (6) ◽  
pp. 3372-3379 ◽  
Author(s):  
Vincent Lombardi ◽  
Laurence Van Overtvelt ◽  
Stéphane Horiot ◽  
Philippe Moingeon
Keyword(s):  
T Cells ◽  
Dendritic Cells ◽  
Cd4 T Cells ◽  
Ifn Γ ◽  
Human Dendritic Cells

Wnt5a signaling increases IL-12 secretion by human dendritic cells and enhances IFN-γ production by CD4+ T cells

2014 ◽  
Vol 162 (1) ◽  
pp. 188-199 ◽  
Author(s):  
Jaris Valencia ◽  
Víctor G. Martínez ◽  
Laura Hidalgo ◽  
Carmen Hernández-López ◽  
Noelia M. Canseco ◽  
...  
Keyword(s):  
T Cells ◽  
Dendritic Cells ◽  
Cd4 T Cells ◽  
Ifn Γ ◽  
Human Dendritic Cells

scholarly journals Splenic Stroma-Educated Regulatory Dendritic Cells Induce Apoptosis of Activated CD4 T Cells via Fas Ligand-Enhanced IFN-γ and Nitric Oxide

2011 ◽  
Vol 188 (3) ◽  
pp. 1168-1177 ◽  
Author(s):  
Xiongfei Xu ◽  
Hai Yi ◽  
Zhenhong Guo ◽  
Cheng Qian ◽  
Sheng Xia ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
T Cells ◽  
Dendritic Cells ◽  
Cd4 T Cells ◽  
Fas Ligand ◽  
Ifn Γ ◽  
Regulatory Dendritic Cells

Potential Tolerizing Capacity of Human Dendritic Cells Featuring High Levels of Expression and Activity of the Tryptophan Metabolizing Enzyme Indoleamine 2,3 Dioxygenase.

Blood ◽  
2006 ◽  
Vol 108 (11) ◽  
pp. 623-623
Author(s):  
Andreas Heitger ◽  
Birgit Juergens ◽  
Ursula Hainz ◽  
Dietmar Fuchs
Keyword(s):  
T Cells ◽  
Dendritic Cells ◽  
T Cell ◽  
T Cell Responses ◽  
Cell Fraction ◽  
Cell Responses ◽  
Indoleamine 2,3 Dioxygenase ◽  
Ifn Γ ◽  
Human Dendritic Cells ◽  
Expression And Activity

Abstract An enhanced tryptophan metabolism mediated by the enzymatic activity of indoleamine 2,3 dioxygenase (IDO) has recently been demonstrated to profoundly affect T cell responses. By the present study we explored whether human dendritic cells (DCs) displaying high IDO expression and activity, down-regulate allogeneic T cell responses. A comparison of lipopolysaccaride (LPS), interferon-γ (IFN-γ), and CD40L as DC maturation agents showed that most abundant IDO expression and activity in DCs was observed when immature DCs were exposed to a combination of LPS and IFN-γ for 48 hours. This time period of maturation was associated with the development of a mature DC phenotype. In contrast, semi-mature DCs, i.e. DCs matured for 4 hours only, were IDO negative. In co-cultures with allogeneic T cells both types of DCs began to metabolize tryptophan, as determined by decreasing concentrations of tryptophan and increasing concentrations of kynurenines in cell culture supernatants, but mature IDO positive DCs did so at a faster rate (complete consumption of tryptophan within 16 hours of co-culture) than semi-mature DCs. A comparison of the allo-stimulatory capacity of semi-mature IDO negative DCs and mature IDO positive DCs showed that at a high DC/T cell ratio (1:1) IDO positive DCs had a significantly reduced capacity to stimulate allogeneic T cells (median 63% reduction, n=5). The reduction of the allogeneic T cell response induced by IDO positive DCs was reversed upon the addition of the IDO inhibitor methylhydantoin-tryptophan to the co-cultures, suggesting an IDO dependent mechanism. Furthermore, allogeneic T cells exposed to IDO positive DCs had an increased rate of apoptosis in the activated cell fraction and after 8 days of co-culture contained a cell fraction (~30%) displaying a CD4+CD25+highFOXP3+ phenotype. These latter cells, when enriched by fluorescent activated cell sorting (FACS), were able to suppress the proliferative response of naive T cells to anti-CD3 mediated stimulation, which indicates the generation of a regulatory T cell population by IDO positive DCs. Together, these findings suggest that the amount of IDO expression and activity by DCs is one feature to govern the type of response of stimulated T cells. Human DCs can be induced to display high levels of IDO expression and activity and, thereby, acquire the ability to effectivley modulate allogeneic T cell responses towards tolerance by eliminating allo-reactive T cells through apoptosis and augmentation of their regulatory rather than their effector potential. Our current approaches address whether this property can be employed to use DCs for the generation of allo-antigen specific tolerance in the setting of hematopoietic cell transplantation.

scholarly journals IL-12hi Rapamycin-Conditioned Dendritic Cells Mediate IFN-γ–Dependent Apoptosis of Alloreactive CD4+ T Cells In Vitro and Reduce Lethal Graft-Versus-Host Disease

2014 ◽  
Vol 20 (2) ◽  
pp. 192-201 ◽  
Author(s):  
Elizabeth O. Stenger ◽  
Brian R. Rosborough ◽  
Lisa R. Mathews ◽  
Huihui Ma ◽  
Markus Y. Mapara ◽  
...  
Keyword(s):  
T Cells ◽  
Dendritic Cells ◽  
Graft Versus Host Disease ◽  
Cd4 T Cells ◽  
Host Disease ◽  
Graft Versus Host ◽  
Ifn Γ

scholarly journals Activation of purified allogeneic CD4+ T cells by rat bone marrow-derived dendritic cells induces concurrent secretion of IFN-γ, IL-4, and IL-10

2005 ◽  
Vol 101 (2) ◽  
pp. 193-201 ◽  
Author(s):  
Shorena Janelidze ◽  
Karin Enell ◽  
Edward Visse ◽  
Anna Darabi ◽  
Leif G. Salford ◽  
...  
Keyword(s):  
Bone Marrow ◽  
T Cells ◽  
Dendritic Cells ◽  
Cd4 T Cells ◽  
Ifn Γ ◽  
Rat Bone

scholarly journals IL-6 down-regulates HLA class II expression and IL-12 production of human dendritic cells to impair activation of antigen-specific CD4+ T cells

2016 ◽  
Vol 65 (2) ◽  
pp. 193-204 ◽  
Author(s):  
Yosuke Ohno ◽  
Hidemitsu Kitamura ◽  
Norihiko Takahashi ◽  
Junya Ohtake ◽  
Shun Kaneumi ◽  
...  
Keyword(s):  
T Cells ◽  
Dendritic Cells ◽  
Cd4 T Cells ◽  
Class Ii ◽  
Hla Class Ii ◽  
Human Dendritic Cells

Extract and fractions from birch bark affect stimulation of human dendritic cells and their activation of allogeneic CD4+ T cells in vitro

Planta Medica ◽  
2010 ◽  
Vol 76 (12) ◽  
Author(s):  
S Omarsdottir ◽  
M Sigurpalsson ◽  
A Eggertsdottir ◽  
J Runarsson ◽  
I Hardardottir ◽  
...  
Keyword(s):  
T Cells ◽  
Dendritic Cells ◽  
Cd4 T Cells ◽  
Birch Bark ◽  
Human Dendritic Cells ◽  
Stimulation Of

scholarly journals Atg5 but not Atg7 in dendritic cells enhances IL-2 and IFN-γ production by Toxoplasma gondii-reactive CD4+ T cells

2015 ◽  
Vol 17 (4) ◽  
pp. 275-284 ◽  
Author(s):  
Elizabeth Liu ◽  
Jennifer Van Grol ◽  
Carlos S. Subauste
Keyword(s):  
T Cells ◽  
Dendritic Cells ◽  
Toxoplasma Gondii ◽  
Cd4 T Cells ◽  
Ifn Γ

Alkaloids from Galipea longiflora Krause modify the maturation of human dendritic cells and their ability to stimulate allogeneic CD4+ T cells

2013 ◽  
Vol 16 (1) ◽  
pp. 79-84 ◽  
Author(s):  
Jacqueline Calla-Magariños ◽  
Carmen Fernández ◽  
Marita Troye-Blomberg ◽  
Jona Freysdottir
Keyword(s):  
T Cells ◽  
Dendritic Cells ◽  
Cd4 T Cells ◽  
Human Dendritic Cells
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