Project description:To further development of insight into the mechanism of toxicity, it is important to employ whole genome microarray expression profiling to identify and characterize miRNAs profiles as a discovery platform relevant for toxicologic mechanisms of hexanal. miRNAs have prominent role in cell cycle control, apoptosis, cancer development and proliferation-related processes. However, few reports have described the effect of hexanal on miRNA expression profiles using animal model. In this respect, we studied the expression profiles of miRNAs in hexanal-exposed in rats by miRNA microarray analysis. To evaluate the miRNA expression in lung tissue of rats after exposure of hexanal, Fischer-344 rats were inhaled to three concentrations (600, 1000, 1500 mg/m3) for 5 weeks. miRNA expression analysis was conducted using Rat miRNA 8 x 15K microarray v19.0 (Agilent Technologies, USA).
Project description:To further development of insight into the mechanism of toxicity, it is important to employ whole genome microarray expression profiling as a discovery platform to ientify genes with the potential to distinguish hexanal exposure across an exposure range relevant for toxicologic mechanisms. However, few reports have described the effect of hexanal on gene expression profiles using animal model. In this respect, we studied the expression profiles of mRNAs in hexanal-exposed in rats by microarray analysis. To evaluate the gene expression in lung tissue of rats after exposure of hexanal, Fischer-344 rats were inhaled to three concentrations (600, 1000, 1500 mg/m3) for 5 weeks. mRNA expression analysis was conducted using Rat GE(v3) 4X44K microarray (Agilent Technologies, USA).
Project description:Background MicroRNA expression is frequently dysregulated in cancer and it could be used potentially as a disease classifier and a prognostic tool in cancer. It has been reported that the cancer associated specific microRNAs were stably detected in blood. The objective of this study was to discover a panel of circulating microRNAs as potential ER+/HER2- breast cancer biomarkers. Methods We compared levels of circulating microRNAs in blood samples from 11 ER+/HER2- advanced breast cancer patients with age-matched 5 control subjects by using microarray-based expression profiling. We validated the level of microRNAs by real-time quantitative polymerase cycle reaction (RT-qPCR) in 40 control subjects, 180 early breast cancer patients (EBC), and 52 metastatic breast cancer patients (MBC). Then, we assessed the association between the levels of microRNA and clinical outcomes of ER+/HER2- metastatic breast cancer. Background MicroRNA expression is frequently dysregulated in cancer and it could be used potentially as a disease classifier and a prognostic tool in cancer. It has been reported that the cancer associated specific microRNAs were stably detected in blood. The objective of this study was to discover a panel of circulating microRNAs as potential ER+/HER2- breast cancer biomarkers. Methods We compared levels of circulating microRNAs in blood samples from 11 ER+/HER2- advanced breast cancer patients with age-matched 5 control subjects by using microarray-based expression profiling. We validated the level of microRNAs by real-time quantitative polymerase cycle reaction (RT-qPCR) in 40 control subjects, 180 early breast cancer patients (EBC), and 52 metastatic breast cancer patients (MBC). Then, we assessed the association between the levels of microRNA and clinical outcomes of ER+/HER2- metastatic breast cancer. Controls: 5 cases; ER +/HER2- breast cancer patients : 11 cases
Project description:miRNAs are not well known their expression and function in tooth development. To identify the miRNAs expression during tooth development, tooth germs were dissected from the initiation bud, cap and bell stages. miRNA-chip expression analysis was performed with RNAs of the molar tooth germs from embryos of pregnant mice at emrbryonic day 11, 12, 14, and 16, using Agilent's miRNA microarray.
Project description:To identify the key microRNAs (miRNAs) of hMSCs required for fate determination, miRNA profiling was performed with hMSCs from three different sources including adipose-derived stem cells (ADSCs), bone-marrow-derived stem cells (BMSCs), and umbilical cord-derived stem cells (UCSCs) versus fibroblasts, a more differentiated mesenchymal cell types. We compared the expression profiles of two different donors per hMSCs to that of fibroblasts. All hMSCs were used for profiling at passage 3-6.
Project description:We aimed to investigate the miRNA expression patterns in Y79 cells, which are from a representative retinoblastoma cell line. We prepared 3 independent sets of cell lysates of Y79 cells in normal culture conditions. Total RNA was prepared from each set of cell lysates using Trizol reagent.
Project description:To investigate miRNA expressions of miRNA upon activation. In vitro-differentiated human NK cells were freshly incubated in the presence of IL15 after 24h deprivation of IL-15. The cells were harvested at the times (0h, resting-Sample 1 and 2; 6h, activated-Sample 3 and 4) and analyzed by microarray.
Project description:Background: Lung cancer has the highest mortality rate of all the cancers in the world and asbestos-related lung cancer is one of the leading occupational cancers. The identification of the asbestos-related molecular changes has been a topic of major research interest over the years. The aim of the current study was to identify novel asbestos-related molecular correlates by integrating miRNA expression profiling with previously obtained microarray data (aCGH and mRNA expression) from the same patient material. Results: Twelve novel asbestos-related miRNAs (over-expressed: miR-148b, miR-374a, miR-24-1*, Let-7d, Let-7e, miR-199b-5p, miR-331-3p and under-expressed: miR-939, miR-671-5p, miR-605, miR-1224-5p, miR-202) which inversely correlated with target genes (e.g. GADD45A, LTBP1, FOSB, NCALD, CACNA2D2, MTSS1, EPB41L3) were identified. In addition, several known and new lung cancer-associated miRNAs were identified. DNA copy number alterations were also correlated with the deregulation of four miRNAs in lung cancer. The importance of integrated analysis was highlighted by the interesting finding of linking of the over-expression of well known squamous cell carcinoma-associated miR-205 with the down-regulation of the gene DOK4. Conclusions: Novel deregulated miRNAs and inversely correlating expression of target genes associated with lung cancer etiology and histology were identified. In addition, DNA copy number alterations correlated with the deregulation of some of the miRNAs. The results of the current study could have potential diagnostic implications, but require further investigation. Methods: The patient material used in the study consisted of 26 tumour and normal lung tissue from highly asbestos-exposed (13 samples) and non-exposed (13 samples) patients. Control lung tissue samples were obtained from 7 patients without cancer as well as from a commercial lung tissue RNA. Data analysis on miRNA expression and integration of miRNA and mRNA data were performed using Chipster (http://chipster.csc.fi/). In addition, miRNA and aCGH data were integrated in a separate analysis. *** This submission represents the microRNA component of the study
Project description:To identify miRNA differentially expressed in CAFs vs matched NFs and analyze the heterogeneity of miRNA expression profiles in the two kinds of cells, we established primary cultures of CAFs and paired NFs from six resected breast tumor tissue without any radiotherapy and chemotherapy treatment. Paired CAFs and NFs from six primary human breast carcinoma specimens were cultured,the third passage of primary cells was used in the experiments.
Project description:To gain deeper insight into the mechanism of toxicity, it is important to identify and characterize mRNAs profiles involved in responses to specific classes of toxicants in conjunction with their impact on gene expression levels. However, few reports have described the effects of toxicants on mRNA expression profiles. Taking into account the prominent role of mRNAs in cancer development, progression, cell cycle control, and proliferation-related processes, it is likely that mRNAs are involved in the toxic response induced by carcinogens. Aldehydes are a well-characterized class of human carcinogens. In the present study, we documented the different expression profiles of mRNAs in environmental carcinogen-exposed A549 cells by mRNA microarray analysis. To evaluate the change in mRNA expression levels, human alveolar cells(A549) were exposed to seven lower-molecular-weight saturated aliphatic aldehyde (LSAAs) for 48h. mRNA expression analysis was conducted using a 4x44k human whole genome oligo microarray (Agilent Technologies, USA).