Unknown,Transcriptomics,Genomics,Proteomics

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Gene expression data from non-infected and M. hyorhinis-infected gastric cancer cell lines using Affymetrix genechip (HuGene-1_0-st)

ABSTRACT: Chronic infection of M. hyorhinis is postulated to be associated with cancer cell migration and invasion. To explore the mechanisms of M. hyorhinis-promoted invasiveness, we performed Affymetrix genechip (HuGene-1_0-st) analysis to examine differential gene expression profiles between non-infected and infected gastric cancer cells. We used microarrays to detail global programme of gene expression and identified distinct classes of upregulated genes after M. hyorhinis infection of gastric cancer cell lines. noninfected or M. hyorhinis-infected gastric cancer cells were utilized for RNA extraction and hybridization on Affymetrix microarrays.

ORGANISM(S): Homo sapiens

SUBMITTER: Chengchao Shou

PROVIDER: E-GEOD-52638 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:In this study we performed a systematic evaluation of functional miRNA-mRNA interactions associated with the aggressiveness of breast cancer cells using a combination of integrated miRNA and mRNA expression profiling, bioinformatics prediction, and functional assays. Analysis of the miRNA expression identified 11 miRNAs that were differentially expressed, including 7 down-regulated (miR-200c, miR-205, miR-203, miR-141, miR-34a, miR-183, and miR-375) and 4 up-regulated miRNAs (miR-146a, miR-138, miR-125b1 and miR-100), in aggressive cell lines when compared to normal and less aggressive cell lines. Transient overexpression of miR-200c, miR-205, and miR-375 in MDA-MB-231 cells led to the inhibition of cell migration and invasion. The integrated analysis of miRNA and mRNA expression identified 35 known and novel target genes of miR-200c, miR-205, and mir-375, including CFL2, LAMC1, TIMP2, ZEB1, CDH11, PRKCA, PTPRJ, PTPRM, LDHB, and SEC23A. Surprisingly, the majority of these genes (27 genes) were target genes of miR-200c, suggesting that it plays a more important role in regulating the aggressiveness of breast cancer cells. We characterized one of the target genes of miR-200c, CFL2, and demonstrated that CFL2 is overexpressed in aggressive breast cancer cell lines and can be significantly down-regulated by exogenous miR-200c. Tissue microarray analysis further revealed that CFL2 expression in primary breast cancer tissue correlated with tumor grade. To our knowledge, this study is the first systematic screening of functional miRNA target genes in aggressive breast cancer cells. The results obtained from this study may improve our understanding of the role of these candidate miRNAs and their target genes in relation to breast cancer aggressiveness and ultimately lead to the identification of novel biomarkers associated with prognosis. Affymetrix Gene 1.0 ST arrays were performed according to the manufacturer's directions on RNA extracted from breast cancer cell lines which are treated with miRNA mimic

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Gene expression data from non-infected and M. hyorhinis-infected gastric cancer cell lines using Affymetrix genechip (HuGene-1_0-st)

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