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Interleukin-10-regulated tumour tolerance in non-small cell lung cancer.

ABSTRACT: BACKGROUND:Lung cancer is the most life-threatening cancer type worldwide. Treatment options include surgery, radio- and chemotherapy, as well as the use of immunomodulatory antibodies. Interleukin (IL)-10 is an immunosuppressive cytokine involved in tumour immune escape. METHODS:Immunohistochemistry (IHC) on human lung surgery tissue as well as human tumour cell line cultures, FACS analysis, real-time PCR and experimental lung cancer. RESULTS:Here we discovered a positive correlation between IL-10 and IL-10 receptor (IL-10R) expression in the lung with tumour diameter in patients with lung cancer (non-small cell lung cancer), the most life-threatening cancer type worldwide. IL-10 and IL-10R were found induced in cells surrounding the lung tumour cells, and IL-10R was mainly expressed on the surface of Foxp-3+ T-regulatory lymphocytes infiltrating the tumour of these patients where its expression inversely correlated with programmed cell death 1. These findings were confirmed in translational studies. In a human lung adenocarcinoma cell line, IL-10R was found induced under metabolic restrictions present during tumour growth, whereby IL-10 inhibited PDL1 and tumour cell apoptosis. CONCLUSIONS:These new findings suggest that IL-10 counteracts IFN-? effects on PD1/PDL1 pathway, resulting in possible resistance of the tumour to anti-PD1/PDL1 immunotherapy.

SUBMITTER: Vahl JM

PROVIDER: S-EPMC5729436 | biostudies-other | 2017 Nov

REPOSITORIES: biostudies-other

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Interleukin-10-regulated tumour tolerance in non-small cell lung cancer.

Vahl Julius Malte JM Friedrich Juliane J Mittler Susanne S Trump Sonja S Heim Lisanne L Kachler Katerina K Balabko Liubov L Fuhrich Nicole N Geppert Carol-Immanuel CI Trufa Denis Iulian DI Sopel Nina N Rieker Ralf R Sirbu Horia H Finotto Susetta S

British journal of cancer 20171010 11

<h4>Background</h4>Lung cancer is the most life-threatening cancer type worldwide. Treatment options include surgery, radio- and chemotherapy, as well as the use of immunomodulatory antibodies. Interleukin (IL)-10 is an immunosuppressive cytokine involved in tumour immune escape.<h4>Methods</h4>Immunohistochemistry (IHC) on human lung surgery tissue as well as human tumour cell line cultures, FACS analysis, real-time PCR and experimental lung cancer.<h4>Results</h4>Here we discovered a positive ...[more]

PMID: 29016555

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Project description:BackgroundHypoxia is a hallmark of cancer and is associated with poor prognosis. However, the molecular mechanism by which hypoxia promotes tumor progression remains unclear. MicroRNAs dysregulation has been shown to play a critical role in the tumor and tumor microenvironment. Here, we investigated the roles of miR-495 and miR-5688 in human non-small cell lung cancer (NSCLC) and their underlying mechanism.MethodsThe expression levels of miR-495 and miR-5688 in human NSCLC tissue specimens were measured by quantitative real-time polymerase chain reaction (qRT-PCR). Deferoxamine (DFO) was used to determine whether the regulation of miR-495 and miR-5688 under hypoxia was dependent on hypoxia-inducible factor 1-alpha (HIF-1α). Furthermore, the functions of miR-495 and miR-5688 in tumor progression were evaluated using colony formation, 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium (MTS), wound healing, transwell assays, and xenograft model. Two algorithms, PicTAR and Targetscan, were used to predict the target gene of these two miRNAs, and dual-luciferase reporter assay was conducted to confirm the target. The unpaired two-tailed t test, Pearson correlation analysis, and Fisher's exact probability test were performed for statistical analyses.ResultsTwo miRNAs, miR-495 and miR-5688, were found to participate in NSCLC progression under hypoxia. They were down-regulated in NSCLC tissues compared with normal tissues. We determined that hypoxia led to the down-regulation of miR-495 and miR-5688 in NSCLC cells, which was independent of HIF-1α and cellular metabolic energy. In addition, miR-495 and miR-5688 suppressed cell proliferation, migration, and invasion in vitro. The NSCLC xenograft model showed that miR-495 and miR-5688 inhibited tumor formation in vivo. Interestingly, we found that miR-495 and miR-5688 had the same target, interleukin-11 (IL-11). Recombinant human IL-11 counteracted the effects of miR-495 and miR-5688 on NSCLC cells, suggesting that miR-495 and miR-5688 executed their tumor suppressive role by repressing IL-11 expression.ConclusionWe found that hypoxia down-regulated the expression levels of miR-495 and miR-5688 in NSCLC to enhance IL-11 expression and tumor progression, indicating that the miR-495/miR-5688/IL-11 axis may serve as a therapeutic target and potential biomarker for NSCLC.

Dataset Information

Interleukin-10-regulated tumour tolerance in non-small cell lung cancer.

Publications

Interleukin-10-regulated tumour tolerance in non-small cell lung cancer.

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