Project description:This study aimed to identify differential expressed genes before and after tranfection with miR-215 and siPCAT1, using the 7721 liver cancer cell line as a model.
Project description:The whole human genome microarray was used for analysis of the differentially expressed genes in SMMC-7721 cells when exposed to 1 μM IMB5043 treatment for 24 h.
Project description:We performed a genome wide transcription profile analysis to determine the expression alterations between control and the POH1 siRNAs transfected SMMC-7721 cells The liver cancer cell line SMMC-7721 transfected with either the control or POH1 siRNAs were subjected to a genome wide transcription profile analysis through Human U133 Puls 2.0 (Affymetrix) microarray
Project description:Cell cycle arrest in response to DNA damage is an important anti-tumorigenic mechanism. microRNAs (miRNAs) were shown recently to play key regulatory roles in cell cycle progression. For example, miR-34a is induced in response to p53 activation and mediates G1 arrest by down-regulating multiple cell cycle-related transcripts. Here we show that genotoxic stress promotes the p53-dependent up-regulation of the homologous miRNAs, miR -192 and miR-215. Like miR-34a, activation of miR-192/215 induces cell cycle arrest suggesting that multiple microRNA families operate in the p53 network. Furthermore, we define a downstream gene expression signature for miR-192/215 expression that includes a number of transcripts that regulate G1 and G2 checkpoints. Of these transcripts, 18 transcripts are direct targets of miR-192/215 and the observed cell cycle arrest likely results from a cooperative effect among the modulations of these genes by the miRNAs. Our results demonstrating a role for miR-192/215 in cell proliferation combined with recent observations that these miRNAs are under-expressed in primary cancers support the idea that miR-192 and miR-215 function as tumor-suppressors. Description: Transfection of siRNA luc, miR-192 or miR-215 into HCT116 Dicerex5, compared to mock-transfected cells, with mRNA expression profiled at 10h and 24h post-transfection. Species: Human Tissue: HCT116 Dicerex5 cell line (tissue of origin = human colorectal carcinoma); this cell line is hypomorphic for Dicer gene function. Dye-swap: no Negative control: siRNA luc Replicates per each timepoint: no
Project description:HCC cell line SMMC-7721 were treatment with human recombinant artemin for 12 hours. Total RNA was extracted and the induced gene expression was analyzed.
Project description:HCC cell line SMMC-7721 were treatment with human recombinant artemin for 12 hours. Total RNA was extracted and the induced gene expression was analyzed. Analysis of gene expression induced by artemin treatment
Project description:To further development of our gene expression approach to microRNA-26a over-expression, we have employed whole mRNA microarray expression profiling as a discovery platform. SMMC-7721 cells at 70–80% confluence in 6-well plates were transfected using Lipofectamine 2000 (Invitrogen). Negative control mimics or miR-26a mimics (100nM) were transfected in each well. Cell extracts were prepared 48 h after transfection, total RNA was checked for a RIN number to inspect RNA integration by Affymetrix PrimeView™ Human Gene Expression Arrays. We used microarrays to detail the global programme of gene expression underlying miR-26a over-expression and identified distinct classes of up-regulated or down-regulated genes during this process.
