Homo sapiens
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA110691 | ENA |
REPOSITORIES: ENA
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Project description:Gene expression profiling of immortalized human mesenchymal stem cells with hTERT/E6/E7 transfected MSCs. hTERT may change gene expression in MSCs. Goal was to determine the gene expressions of immortalized MSCs.
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Project description:Gene expression profile of hESC/hIPC-derived keratinocytes
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Project description:We have sequenced miRNA libraries from human embryonic, neural and foetal mesenchymal stem cells. We report that the majority of miRNA genes encode mature isomers that vary in size by one or more bases at the 3’ and/or 5’ end of the miRNA. Northern blotting for individual miRNAs showed that the proportions of isomiRs expressed by a single miRNA gene often differ between cell and tissue types. IsomiRs were readily co-immunoprecipitated with Argonaute proteins in vivo and were active in luciferase assays, indicating that they are functional. Bioinformatics analysis predicts substantial differences in targeting between miRNAs with minor 5’ differences and in support of this we report that a 5’ isomiR-9-1 gained the ability to inhibit the expression of DNMT3B and NCAM2 but lost the ability to inhibit CDH1 in vitro. This result was confirmed by the use of isomiR-specific sponges. Our analysis of the miRGator database indicates that a small percentage of human miRNA genes express isomiRs as the dominant transcript in certain cell types and analysis of miRBase shows that 5’ isomiRs have replaced canonical miRNAs many times during evolution. This strongly indicates that isomiRs are of functional importance and have contributed to the evolution of miRNA genes
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Project description:Safety is the principle consideration with any clinical program, for which hESC and their derived products hold specific challenges. Differentiated cell products derived from hESC must be free from pluripotent cells as these could potentially form teratomas. One relevant clinical program is transplantation of retinal pigment epithelial cells (RPE) derived from hESC. This has potential for halting visual decline in conditions where the RPE layer is damaged such as age-related macular degeneration (AMD). In this study we show that whole genome gene expression analysis of SHEF1.3 starting material and the P0 pigmented RPE foci shows that the two cell types are distinct.
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