Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Transcription profiling of human cholangiocarcinoma cells (cholangiocytes) expressing IL-6

ABSTRACT: The association between chronic inflammation and the development and progression of malignancy is exemplified in the biliary tract where persistent inflammation strongly predisposes to cholangiocarcinoma. The inflammatory cytokine interleukin-6 (IL-6) enhances tumor growth in cholangiocarcinoma by altered gene expression via autocrine mechanisms. We therefore investigated the effect of chronic exposure to IL-6 on gene expression using malignant cholangiocytes stably transfected to overexpress IL-6. Comparison of gene expression identified several genes that were altered by enforced IL-6 expression. Experiment Overall Design: Mz-ChA-1 cells were stably transfected with a pTarget vector plasmid containing full length IL-6 under the control of a CMV promoter to generate Mz-IL6. Cells transfected with empty vector were used as control

ORGANISM(S): Homo sapiens

SUBMITTER: Tushar Patel

PROVIDER: E-GEOD-11883 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Interleukin-6 contributes to growth in cholangiocarcinoma cells by aberrant promoter methylation and gene expression.

Wehbe Hania H Henson Roger R Meng Fanyin F Mize-Berge Janna J Patel Tushar T

Cancer research 20061101 21

The association between chronic inflammation and the development and progression of malignancy is exemplified in the biliary tract where persistent inflammation strongly predisposes to cholangiocarcinoma. The inflammatory cytokine interleukin-6 (IL-6) enhances tumor growth in cholangiocarcinoma by altered gene expression via autocrine mechanisms. IL-6 can regulate the activity of DNA methyltransferases, and moreover, aberrant DNA methylation can contribute to carcinogenesis. We therefore investi ...[more]

PMID: 17079474

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Project description:Photodynamic therapy (PDT) of solid cancers comprises the administration of a photosensitizer followed by illumination of the photosensitizerreplete tumor with laser light. This induces a state of local oxidative stress, culminating in the destruction of tumor tissue and microvasculature and induction of an anti-tumor immune response. However, some tumor types, including perihilar cholangiocarcinoma, are relatively refractory to PDT, which may be attributable to the activation of survival pathways in tumor cells following PDT (i.e., activator protein 1 (AP-1)-, nuclear factor of kappa light polypeptide gene enhancer in B-cells (NF-ÎºB)-, hypoxia-inducible factor 1-alpha (HIF-1Î±)-, nuclear factor (erythroid-derived 2)-like 2 (NFE2L2), and unfolded protein response-mediated pathways). To assess the activation of survival pathways after PDT, human perihilar cholangiocarcinoma (SK-ChA-1) cells were subjected to PDT with zinc phthalocyanine (ZnPC)-encapsulating liposomes. Following a 30-minute incubation with liposomes, the cells were either left untreated or treated at low (50 mW) or high (500 mW) laser power (cumulative light dose of 15 J/cm2). Cells were harvested 90 minutes post-PDT and whole genome expression analysis was performed using Illumina HumanHT-12 v4 expression beadchips. Hilar cholangiocarcinoma (SK-ChA-1) cells were incubated with PBS (control group) or 500 Î¼M zinc phthalocyanine (ZnPC)-encapsulating liposomes (ZnPC-ITLs, final lipid concentration). After 30 minutes, cells that were incubated with ZnPC-ITLs were either kept in the dark (ITL group) or were treated with 500-mW (ITL 500) or 50-mW (ITL 50) laser light (n = 3 per group, cumulative light dose of 15 J/cm2). Ninety minutes after photodynamic therapy, total cellular RNA was isolated and gene expression levels were analyzed by using the Illumina HumanHT-12 v4 platform. The data was analyzed in the context of survival signalling and comparisons were made with the control group.

Dataset Information

Transcription profiling of human cholangiocarcinoma cells (cholangiocytes) expressing IL-6

Publications

Interleukin-6 contributes to growth in cholangiocarcinoma cells by aberrant promoter methylation and gene expression.

Similar Datasets

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