Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

MicroRNA expression profiling among human embryonic stem cells, differerentiated EBs and adult cells

ABSTRACT: Human embryonic stem (hES) cells have unique features: self-renewal ability and pluripotency. They can be continuously cultured in undifferentiated state and give rise to cells and tissues of all three germ layers. Thus hES cells provide a resource not only for cell replacement therapy but also for studying human developmental biology. We aimed to identify the unique signature of miRNAs in human embryonic stem cells. Keywords: cell type comparison design We performed microRNA expression profiling on 3 passages from 2 different hES cell lines (WA09 (H9) and BG01v) and 4 passages from 1 hES cell line (TE06 (I6)), EBs samples derived from WA09 cells at 4 different time points with replicates, and 5 types of adult cells (HUVEC, HMVEC, UASMC NHA, and LFB).

ORGANISM(S): Homo sapiens

SUBMITTER: Francesco Marincola

PROVIDER: E-GEOD-12229 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

MicroRNA and gene expression patterns in the differentiation of human embryonic stem cells.

Ren Jiaqiang J Jin Ping P Wang Ena E Marincola Francesco M FM Stroncek David F DF

Journal of translational medicine 20090323

<h4>Background</h4>The unique features of human embryonic stem (hES) cells make them the best candidate resource for both cell replacement therapy and development research. However, the molecular mechanisms responsible for the simultaneous maintenance of their self-renewal properties and undifferentiated state remain unclear. Non-coding microRNAs (miRNA) which regulate mRNA cleavage and inhibit encoded protein translation exhibit temporal or tissue-specific expression patterns and they play an i ...[more]

PMID: 19309508

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Project description:Microarray was used to analyze azole resistance of Candida glabrata oropharyngeal isolates from 7 hematopoietic stem cell transplant recipients receiving fluconazole prophylaxis. Transcriptional profiling of the sequential-paired clinical isolates by microarray revealed 19 genes upregulated in the majority of resistant isolates compared to their paired-susceptible isolates. All seven resistant isolates had greater than two fold upregulation of CgPDR1, a master transcriptional regulator of PDR network, and all 7 resistant isolates showed upregulation of known CgPDR1-target genes. The altered transcriptome can be explained in part by the observation that all 7 resistant isolates had acquired a single nonsynonymous mutation in their CgPDR1 ORF. Four mutations occurred in the regulatory domain (L280P, L344S, G348A, S391L) and one in the activation domain (G943S) while two mutations (N764I, R772I) occurred in an undefined region. Association of azole resistance and the CgPDR1 mutations was investigated in the same genetic background by introducing the CgPDR1 sequences from one sensitive and five resistant isolates into a laboratory azole-sensitive strain (cgpdr1) via integrative transformation. The cgpdr1 strain was restored to wild-type fluconazole susceptibility when transformed with CgPDR1 from the susceptible isolate but became resistant when transformed with CgPDR1 from the resistant isolates. However, despite the identical genetic background, upregulation of CgPDR1 and CgPDR1-target genes varied between the 5 transformants, independent of the domain locations in which the mutations occurred. In sum, gain-of-function mutations in CgPDR1 not only contributed to the clinical azole resistance but different mutations had varying degrees of impact on the CgPDR1-target genes. Seven pairs of oropharyngeal sequential isolates were chosen for study because each pair came from an individual hematopoietic stem cell transplant recipient receiving fluconazole. Seven groups consisted of 5 biological replicates in which a sensitive sample was paired with a resistant sample. Each group included 1 to 2 reciprocally labeled samples.

Dataset Information

MicroRNA expression profiling among human embryonic stem cells, differerentiated EBs and adult cells

Publications

MicroRNA and gene expression patterns in the differentiation of human embryonic stem cells.

Similar Datasets

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