TY  - JOUR
A1  - Rolvering, Catherine
A1  - Zimmer, Andreas D.
A1  - Ginolhac, Aurélien
A1  - Margue, Christiane
A1  - Kirchmeyer, Mélanie
A1  - Servais, Florence
A1  - Hermanns, Heike M.
A1  - Hergovits, Sabine
A1  - Nazarov, Petr V.
A1  - Nicot, Nathalie
A1  - Kreis, Stephanie
A1  - Haan, Serge
A1  - Behrmann, Iris
A1  - Haan, Claude
T1  - The PD-L1-and IL6-mediated dampening of the IL27/STAT1 anticancer responses are prevented by alpha-PD-L1 or alpha-IL6 antibodies
JF  - Journal of Leukocyte Biology
N2  - Interleukin-27 (IL27) is a type-I cytokine of the IL6/IL12 family and is predominantly secreted by activated macrophages and dendritic cells. We show that IL27 induces STAT factor phosphorylation in cancerous cell lines of different tissue origin. IL27 leads to STAT1 phosphorylation and recapitulates an IFN--like response in the microarray analyses, with up-regulation of genes involved in antiviral defense, antigen presentation, and immune suppression. Like IFN-, IL27 leads to an up-regulation of TAP2 and MHC-I proteins, which mediate increased tumor immune clearance. However, both cytokines also upregulate proteins such as PD-L1 (CD274) and IDO-1, which are associated with immune escape of cancer. Interestingly, differential expression of these genes was observed within the different cell lines and when comparing IL27 to IFN-. In coculture experiments of hepatocellular carcinoma (HCC) cells with peripheral blood mononuclear cells, pre-treatment of the HCC cells with IL27 resulted in lowered IL2 production by anti-CD3/-CD28 activated T-lymphocytes. Addition of anti-PD-L1 antibody, however, restored IL2 secretion. The levels of other T(H)1 cytokines were also enhanced or restored upon administration of anti-PD-L1. In addition, we show that the suppression of IL27 signaling by IL6-type cytokine pre-stimulationmimicking a situation occurring, for example, in IL6-secreting tumors or in tumor inflammation-induced cachexiacan be antagonized by antibodies against IL6-type cytokines or their receptors. Therapeutically, the antitumor effects of IL27 (mediated, e.g., by increased antigen presentation) might thus be increased by combining IL27 with blocking antibodies against PD-L1 or/and IL6-type cytokines.
KW  - cytokine
KW  - interferon
KW  - IFN-gamma
KW  - IDO-1
KW  - OSM
Y1  - 2018
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-226974
VL  - 104
IS  - 5
ER  -