Protective vaccination induces differential miRNA expression in the liver of Balb/c mice during crisis of Plasmodium chabaudi blood-stage malaria
ABSTRACT: The aim of the present study was to analyze the effect of protective vaccination on the miRNome of the liver during the crisis phase in vaccination-induced self-healing infections of Plasmodium chabaudi in comparison to lethal infections in non-protected Balb/c mice using Agilent’s microRNA expression microarrays.
Project description:This SuperSeries is composed of the following subset Series: GSE28423: Modulation of the osteosarcoma expression phenotype by miRNAs [Agilent] GSE28424: Modulation of the osteosarcoma expression phenotype by miRNAs [Illumina] Refer to individual Series
Project description:Background: Osteosarcomas are the most common primary malignant tumors of bone and show multiple and complex genomic aberrations. miRNAs are non-coding RNAs capable of regulating gene expression at the post transcriptional level, and miRNAs and their target genes may represent novel therapeutic targets or biomarkers for osteosarcoma. In order to investigate the involvement of miRNAs in osteosarcoma development, global microarray analyses of a panel of 19 human osteosarcoma cell lines was performed. Principal findings: We identified 177 miRNAs that were differentially expressed in osteosarcoma cell lines relative to normal bone. Among these, miR-126/miR-126*, miR-142-3p, miR-150, miR-223, miR-486-5p and members of the miR-1/miR-133a, miR-144/miR-451, miR-195/miR-497, and miR-206/miR-133b clusters were found to be downregulated in osteosarcoma cell lines. All miRNAs in the paralogous clusters miR-17-92, miR-106b-25 and miR-106a-92 were overexpressed. Furthermore, the upregulated miRNAs included miR-9/miR-9*, miR-21*, miR-31/miR-31*, miR-196a/miR-196b, miR-374a and members of the miR-29, miR-130/301 families. The most interesting inversely correlated miRNA/mRNA pairs in osteosarcoma cell lines included miR-9/TGFBR2 and miR-29/the p85α regulatory subunit of PI3K. PTEN mRNA correlated inversely with miR-92a and members of the miR-17 and miR-130/301 families. Expression profiles of selected miRNAs were confirmed in clinical samples. A set of miRNAs, miR-1, miR-18a, miR-18b, miR-19b, miR-31, miR-126, miR-142-3p, miR-133b, miR-144, miR-195, miR-223, miR-451 and miR-497 was identified with an intermediate expression level in osteosarcoma clinical samples compared to osteoblasts and bone, which may reflect the differentiation level of osteosarcoma relative to the undifferentiated osteoblast and fully differentiated normal bone. Significance: This study provides an integrated analysis of miRNA and mRNA in osteosarcoma, and gives new insight into the complex genetic mechanisms of osteosarcoma development and progression. 19 osteosarcoma cell lines, 4 normal bones used as controls. No replicates. The group of osteosarcomas are compared to the group of normal bones.
Project description:We have analyzed miRNA expression profile in FO and MZ B cells to identified differentially expressed miRNAs between this two subsets that could be potencially involved in the regulation of terminal B cell differentiation Spleens from CD19-Creki/+Dicerfl/+ and CD19-Creki/+Dicerfl/fl mice were collected and after erythrocyte lysis, splenocytes were stained with anti-B220, anti-CD21 and anti-CD23 antibodies. B220+CD21brightCD23+ (MZ) and B220+CD21+CD23bright (FO) B cell populations were sorted and total RNA of purified populations was extracted with TRIzol. miRNA microarray hybridations were performed on Mouse miRNA Microarray platform (Agilent Technologies).
Project description:Regulatory T cells (Tregs) are frequently functionally impaired in patients with Granulomatosis with PolyAngiitis (GPA). However, the mechanism underlying their impaired function is unknown. Here, we hypothesized that Treg dysfunction in GPA is due to altered microRNA (miRNA) expression.
Project description:Glioblastoma is the most aggressive and lethal malignant brain tumor. miRNA expression profiling could be useful in improving the classification of tumors and predicting their behavior. In this study, the miRNA expression patterns in glioblastoma tumor tissues and adjacent normal tissues were identified through expression profiling of a patient with glioblastoma. The results will hopefully enhance our understandings of the epigentic changes in glioblastoma progression and provide candidates for miRNAs-based targeting tharapy. A paired miRNAs tumor tissues and adjacent tissues of a glioblastoma patient was used in this study. miRNAs were isolated using miRNeasy FFPE Kit (Qiagen). Profiling was established by applying the Agilent human miRNA Microarray (8 × 60K, v16.0) (Agilent Technologies).
Project description:This data is a subset of the miRQC study, submitted for publication in summer of 2013. The purpose of the study was to compare various aspects of miRNA profiling platform performance (reproducibility, sensitivity, accuracy, etc) using a standardized set of samples. The data included in this submission is a subset of the study data generated on the Agilent miRNA profiling system. The array used was designed to measure all of the human and human viral miRNAs in miRBase 16.0 and the is annotated based on miRBase 18. Analysis for the miRQC study was based only on the human sequences present in miRBase 18 (8 sequences were deleted between 16.0 and 18.0) miRNA profiling on a standardized set of 20 samples.
Project description:Total RNA samples from three independent transfection experiments of vectors containing two different allelic variants of 4 miRNAs (hsa-mir-146a, hsa-mir-196a2, hsa-mir-499a, hsa-mir-499b) and an empty vector. The selected variants are cancer associated SNPs located in cancer related miRNAs. The aim of this study is to identify functional explanations for those associations. HeLa cells were used for microarray expression experiments in Agilent SurePrint G3 Human Gene Expression microarrays (8x60k), which target over 60,000 well-annotated RefSeq transcripts starting from 300ng of total RNA. Data were analyzed using the Array File Maker (AFM) 4.0 software package (Array File Maker, Stanford, California).
Project description:The microRNA oligo microarrays from Agilent were used to evaluate behavioral differences in osteoblast-like cells from calvaria and bone marrow of rats induced to osteoporosis by ovariectomy. The miRNAs data were normalized using the quantile and after statistical analysis by moderate t-test with p-value ≤ 0.05 and subsequent fold change ≥ 1.5, 84 miRNAs differentially expressed in calvaria cells were detected and 55 miRNAs in bone marrow cells.
Project description:The mRNA oligo microarrays from Agilent were used to evaluate behavioral differences in osteoblast-like cells from calvaria and bone marrow of rats induced to osteoporosis by ovariectomy. Microarray data were normalized using quantile and after statistical analysis by unpaired t-test with p-value ≤ 0.005 and subsequent fold change ≥ 2.0, 5.447 differentially expressed mRNAs were detected in calvaria cells and 4.399 mRNAs in bone marrow cells.
Project description:To evaluate the miRNA and mRNA expression profiles (miRNOME) we identified miRNAs during in vitro osteogenic differentiation of human dental pulp stem cells (DPSC). The DPSCs were cultured in the DMEM + beta-glycerol phosphate, ascorbic acid and dexamethasone for 2 dias to 21days. The microRNA or mRNA expression profiling during the differentiation process was analyzed through hybridizations with Agilent miRNA-microarray (8x15K format).