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Cross species hybridization of human cancer cells co-cultured with mouse astrocytes and fibroblasts (Illumina human-6)

ABSTRACT: Brain metastases are highly resistant to chemotherapy. Brain metastases are surrounded and infiltrated by activated astrocytes. To examine the genes whose expression is associated with chemo-resistance of brain-metastasized cancer cells, gene expression data were collected and analyzed from breast cancer cells and lung cancer cells co-cultured with astrocytes. Fibroblast cells were used as control. Total RNAs were extracted from co-cultured cells and hybridized to human microarray and mouse microarrays to detect human cell and mouse cell specific gene expression data.

ORGANISM(S): Homo sapiens

SUBMITTER: Sangbae Kim

PROVIDER: E-GEOD-26291 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Gene expression of human cancer cells co-cultured with mouse astrocytes and fibroblasts after series of cross co-culture

Project description:Brain metastases are highly resistant to chemotherapy. Brain metastases are surrounded and infiltrated by activated astrocytes. To examine the genes whose expression is associated with chemo-resistance of brain-metastasized cancer cells, gene expression data were collected and analyzed from breast cancer cells and lung cancer cells co-cultured with astrocytes. Fibroblast cells were used as control. Human lung cancer cell PC14 was co-cultured with mouse astrocytes or fibroblasts for two rounds. Total RNAs were extracted from co-cultured cells and hybridized to human microarray.

2012-12-31 | E-GEOD-26292 | biostudies-arrayexpress

Cross species hybridization of human cancer cells co-cultured with mouse astrocytes and fibroblasts (Illumina mouse-6)

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Cross species hybridization of human cancer cells co-cultured with mouse astrocytes and fibroblasts (Illumina mouse-6)

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2011-09-23 | E-GEOD-19179 | biostudies-arrayexpress

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Project description:To address the challenges associated with the investigation of brain-metastasized cancers and provide insights into the drivers of cancer cell behavior at the brain metastatic site, this study was aimed at exploring the response of SKBR3/HER2+ cells to neural factors secreted by brain cells that come first in contact with the metastasized cancer cells, i.e., human endothelial cells (HBEC5i), astrocytes (NHA), and microglia (HMC3). To this end, serum-starved breast cancer cells were exposed to the combined secretome of brain cells, allowed to grow for 24h, and analyzed by LC-MS/MS using an Orbitrap QE instrument to generate and compare the whole cell proteome profiles of treated vs non-treated cells.

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Cross species hybridization of human cancer cells xenografted into different mouse organ sites

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Intercellular transfer of small RNAs from astrocytes to lung tumor cells induces resistance to chemotherapy.

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Overexpression of Snail is associated with lymph node metastasis and poor prognosis in patients with gastric cancer

Project description:Epithelial-mesenchymal transition (EMT) is in the highlights as a significant role in tumor progression and invasion. Snail was known as the one of regulators of EMT in various malignant tumors. The aim of this study was to investigate the effect of Snail on invasiveness/migratory ability of gastric cancer cell lines and clinicopathological and prognostic significance of Snail over-expression using immunohistochemistry in tissue microarray of 314 gastric adenocarcinomas (GC). Differential gene expression in Snail over-expressed GC was investigated using cDNA microarray analysis. Silencing of Snail by ShRNA induced decreased of invasion, migration of gastric cancer cell lines. In contrast, over-expression of Snail induced increased invasiveness and migratory ability of gastric cancer cell lines in accordance increase of VEGF and MMP11. Furthermore, the over-expression of Snail (?75% nuclear staining of Snail) was significantly associated with tumor progression (p<0.0001), lymph node metastases (p=0.002), lymphovascular invasion (p=0.002), and perineural invasion (p=0.002) in 314 GC patient. Snail over-expression was also associated with poor prognosis (shorter survival) in GC patients (p=0.023). cDNA microarray revealed 213 differential expressed genes in Snail over-expressed GC tissues, including genes related to metastasis, invasion. Based on above results, it was suggested that Snail plays a significant role in invasiveness/migratory ability of GCs. In addition, Snail might be used to predictive biomarker for evaluation of prognosis or aggressiveness in GCs. 48 primary gastric adenocarcinoma fresh frozen tissues were used for microarray. All the tissues were obtained after curative resection after pathologic confirm at Pusan National University Hospital (PNUH, Busan, Korea) and Cheonnam University Hospital (CNUH, Cheonnam, Korea). Microarray experiment and data analysis were done at Cancer research institute, PNUH, Busan, Korea.

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