Human CD14+CTLA‐4+ regulatory dendritic cells suppress T‐cell response by cytotoxic T‐lymphocyte antigen‐4‐dependent IL‐10 and indoleamine‐2,3‐dioxygenase production in hepatocellular carcinoma

Hepatocellular carcinoma (HCC) is one of the most common malignancies worldwide with limited therapeutic options. HCC‐induced immunosuppression often leads to ineffectiveness of immuno‐promoting therapies. Currently, suppressing the suppressors has become the potential strategy for cancer immunother...

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Veröffentlicht in:Hepatology (Baltimore, Md.) Md.), 2014-02, Vol.59 (2), p.567-579
Hauptverfasser: Han, Yanmei, Chen, Zhubo, Yang, Yuan, Jiang, Zhengping, Gu, Yan, Liu, Yangfang, Lin, Chuan, Pan, Zeya, Yu, Yizhi, Jiang, Minghong, Zhou, Weiping, Cao, Xuetao
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container_issue 2
container_start_page 567
container_title Hepatology (Baltimore, Md.)
container_volume 59
creator Han, Yanmei
Chen, Zhubo
Yang, Yuan
Jiang, Zhengping
Gu, Yan
Liu, Yangfang
Lin, Chuan
Pan, Zeya
Yu, Yizhi
Jiang, Minghong
Zhou, Weiping
Cao, Xuetao
description Hepatocellular carcinoma (HCC) is one of the most common malignancies worldwide with limited therapeutic options. HCC‐induced immunosuppression often leads to ineffectiveness of immuno‐promoting therapies. Currently, suppressing the suppressors has become the potential strategy for cancer immunotherapy. So, figuring out the immunosuppressive mechanisms induced and employed by HCC will be helpful to the design and application of HCC immunotherapy. Here, we identified one new subset of human CD14+CTLA‐4+ regulatory dendritic cells (CD14+DCs) in HCC patients, representing ∼13% of peripheral blood mononuclear cells. CD14+DCs significantly suppress T‐cell response in vitro through interleukin (IL)‐10 and indoleamine‐2,3‐dioxygenase (IDO). Unexpectedly, CD14+DCs expressed high levels of cytotoxic T‐lymphocyte antigen‐4 (CTLA‐4) and programmed death‐1, and CTLA‐4 was found to be essential to IL‐10 and IDO production. So, we identified a novel human tumor‐induced regulatory DC subset, which suppresses antitumor immune response through CTLA‐4‐dependent IL‐10 and IDO production, thus indicating the important role of nonregulatory T‐cell‐derived CTLA‐4 in tumor‐immune escape or immunosuppression. Conclusions: These data outline one mechanism for HCC to induce systemic immunosuppression by expanding CD14+DCs, which may contribute to HCC progression. This adds new insight to the mechanism for HCC‐induced immunosuppression and may also provide a previously unrecognized target of immunotherapy for HCC. (Hepatology 2014;59:567–579)
doi_str_mv 10.1002/hep.26694
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HCC‐induced immunosuppression often leads to ineffectiveness of immuno‐promoting therapies. Currently, suppressing the suppressors has become the potential strategy for cancer immunotherapy. So, figuring out the immunosuppressive mechanisms induced and employed by HCC will be helpful to the design and application of HCC immunotherapy. Here, we identified one new subset of human CD14+CTLA‐4+ regulatory dendritic cells (CD14+DCs) in HCC patients, representing ∼13% of peripheral blood mononuclear cells. CD14+DCs significantly suppress T‐cell response in vitro through interleukin (IL)‐10 and indoleamine‐2,3‐dioxygenase (IDO). Unexpectedly, CD14+DCs expressed high levels of cytotoxic T‐lymphocyte antigen‐4 (CTLA‐4) and programmed death‐1, and CTLA‐4 was found to be essential to IL‐10 and IDO production. So, we identified a novel human tumor‐induced regulatory DC subset, which suppresses antitumor immune response through CTLA‐4‐dependent IL‐10 and IDO production, thus indicating the important role of nonregulatory T‐cell‐derived CTLA‐4 in tumor‐immune escape or immunosuppression. Conclusions: These data outline one mechanism for HCC to induce systemic immunosuppression by expanding CD14+DCs, which may contribute to HCC progression. This adds new insight to the mechanism for HCC‐induced immunosuppression and may also provide a previously unrecognized target of immunotherapy for HCC. 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HCC‐induced immunosuppression often leads to ineffectiveness of immuno‐promoting therapies. Currently, suppressing the suppressors has become the potential strategy for cancer immunotherapy. So, figuring out the immunosuppressive mechanisms induced and employed by HCC will be helpful to the design and application of HCC immunotherapy. Here, we identified one new subset of human CD14+CTLA‐4+ regulatory dendritic cells (CD14+DCs) in HCC patients, representing ∼13% of peripheral blood mononuclear cells. CD14+DCs significantly suppress T‐cell response in vitro through interleukin (IL)‐10 and indoleamine‐2,3‐dioxygenase (IDO). Unexpectedly, CD14+DCs expressed high levels of cytotoxic T‐lymphocyte antigen‐4 (CTLA‐4) and programmed death‐1, and CTLA‐4 was found to be essential to IL‐10 and IDO production. So, we identified a novel human tumor‐induced regulatory DC subset, which suppresses antitumor immune response through CTLA‐4‐dependent IL‐10 and IDO production, thus indicating the important role of nonregulatory T‐cell‐derived CTLA‐4 in tumor‐immune escape or immunosuppression. Conclusions: These data outline one mechanism for HCC to induce systemic immunosuppression by expanding CD14+DCs, which may contribute to HCC progression. This adds new insight to the mechanism for HCC‐induced immunosuppression and may also provide a previously unrecognized target of immunotherapy for HCC. 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HCC‐induced immunosuppression often leads to ineffectiveness of immuno‐promoting therapies. Currently, suppressing the suppressors has become the potential strategy for cancer immunotherapy. So, figuring out the immunosuppressive mechanisms induced and employed by HCC will be helpful to the design and application of HCC immunotherapy. Here, we identified one new subset of human CD14+CTLA‐4+ regulatory dendritic cells (CD14+DCs) in HCC patients, representing ∼13% of peripheral blood mononuclear cells. CD14+DCs significantly suppress T‐cell response in vitro through interleukin (IL)‐10 and indoleamine‐2,3‐dioxygenase (IDO). Unexpectedly, CD14+DCs expressed high levels of cytotoxic T‐lymphocyte antigen‐4 (CTLA‐4) and programmed death‐1, and CTLA‐4 was found to be essential to IL‐10 and IDO production. So, we identified a novel human tumor‐induced regulatory DC subset, which suppresses antitumor immune response through CTLA‐4‐dependent IL‐10 and IDO production, thus indicating the important role of nonregulatory T‐cell‐derived CTLA‐4 in tumor‐immune escape or immunosuppression. Conclusions: These data outline one mechanism for HCC to induce systemic immunosuppression by expanding CD14+DCs, which may contribute to HCC progression. This adds new insight to the mechanism for HCC‐induced immunosuppression and may also provide a previously unrecognized target of immunotherapy for HCC. (Hepatology 2014;59:567–579)</abstract><cop>United States</cop><pub>Wiley Subscription Services, Inc</pub><pmid>23960017</pmid><doi>10.1002/hep.26694</doi><tpages>13</tpages><oa>free_for_read</oa></addata></record>
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subjects Adolescent
Adult
Aged
Carcinoma, Hepatocellular - metabolism
Carcinoma, Hepatocellular - pathology
Case-Control Studies
CD11b Antigen - metabolism
CD4-Positive T-Lymphocytes - metabolism
CD4-Positive T-Lymphocytes - pathology
CTLA-4 Antigen - metabolism
Cytotoxicity
Dendritic Cells - metabolism
Dendritic Cells - pathology
Disease Progression
Female
Hepatology
Humans
Immune system
Immunosuppression
Immunotherapy
In Vitro Techniques
Indoleamine-Pyrrole 2,3,-Dioxygenase - metabolism
Interleukin-10 - metabolism
Leukocytes, Mononuclear - pathology
Lipopolysaccharide Receptors - metabolism
Liver cancer
Liver Neoplasms - metabolism
Liver Neoplasms - pathology
Male
Middle Aged
Phenotype
Programmed Cell Death 1 Receptor - metabolism
T cell receptors
Young Adult
title Human CD14+CTLA‐4+ regulatory dendritic cells suppress T‐cell response by cytotoxic T‐lymphocyte antigen‐4‐dependent IL‐10 and indoleamine‐2,3‐dioxygenase production in hepatocellular carcinoma
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