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U937 scramble (Usc) vs U937 miR-194-5p (UmiR-194-5p)

ABSTRACT: Transcriptional profiling of U937 scramble vs U937 miR-194-5p (UmiR-194-5p)

ORGANISM(S): Homo sapiens

PROVIDER: GSE73646 | GEO | 2017/05/22

SECONDARY ACCESSION(S): PRJNA297481

REPOSITORIES: GEO

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U937 miR-194-5p (UmiR-194-5p) vs U937 miR-194-5p (UmiR-194-5p) treated with MS275 (SNDX 275;Entinostat)

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U937 miR-194-5p (UmiR-194-5p) vs U937 miR-194-5p (UmiR-194-5p) treated with SAHA (Vorinostat; suberoylanilide hydroxamic acid)

Project description:Transcriptional profiling of U937 miR-194-5p (UmiR-194-5p) vs U937 miR-194-5p (UmiR-194-5p) treated with SAHA (Vorinostat; suberoylanilide hydroxamic acid) for 24 h at 5uM concetration

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Gene expression of U937 miR-194-5p cells untreated and upon epigenetic treatments

Project description:Gene expression of U937 miR-194-5p cells untreated and upon epigenetic treatments

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Project description:U937 scramble (Usc) vs U937 miR-194-5p (UmiR-194-5p)

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Identification of miR-194-5p target genes in gastric cancer

Project description:Increasing studies report that miR-194-5p plays a tumor suppressor role in gastric cancer (GC). Previous studies have revealed that miR-194 inhibited gastric cancer progression through different pathways by affecting the expression level of different target genes. For example, miR-194 have been reported to be able to regulate the expression of FOXM1, NR2F2, BMI1, SDAD1, RBX1, KDM5B, ZEB1 and AKT2 etc. It suggested that miR-194 may play complicated roles in GC. To figure out the mechanism of miR-194' tumor suppressor role in GC, we performed RNA sequencing in two different GC cell lines. Our studies showed that miR-194 tends to regulated target genes by binding on their 3' untranslated regions with either 7-mer-A1 or 7-mer-m8 or 8-mer. Approximately 138 genes were downregulated in both SGC7901 and BGC823 cell lines that transfected with miR-194-5p mimics compared to negative control siRNAs. Most of the downregulated genes have not reported yet.

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Project description:Paclitaxel is a first-line drug for treating epithelial ovarian cancer (EOC). However, prognosis for patients with advanced stage cancer remains poor due to primary or acquired drug resistance. Therefore, overcoming chemoresistance is one of the greatest challenges in treating EOC. In this study, we identified microRNAs (miRNA) that regulate paclitaxel resistance and tested their potential utility as therapeutic targets. Paclitaxel-resistant cell lines were established using two EOC cell lines: SKVO3ip1 and HeyA8. miRNA PCR arrays showed that miR-194-5p was downregulated in paclitaxel-resistant cells. Forced expression of miR-194-5p resensitized resistant cells to paclitaxel. Conversely, miR-194-5p inhibition induced paclitaxel resistance in parental cells. In silico analysis and luciferase reporter assay revealed that MDM2 is a direct target of miR-194-5p. MDM2 was upregulated in paclitaxel resistant cells compared with parental cells. MDM2 inhibition also resensitized resistant cells to paclitaxel and forced MDM2 induced paclitaxel resistance in parental cells. miR-194-5p induced p21 upregulation and G1 phase arrest in resistant cells by downregulating MDM2. Furthermore, a public database showed that high MDM2 expression was associated with a shorter progression-free survival in EOC patients treated with paclitaxel. Collectively, our results show that restoring miR-194-5p expression resensitizes EOCs to paclitaxel, and this may be exploited as a therapeutic option.

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The miR-194-5p/BCLAF1 module is responsible for maturation block, cell fate and treatment susceptibility in AML.

Project description:miRNAs deregulation contributes to cancer. miR-194-5p is up-regulated by the HDAC inhibitor (HDACi) SAHA, negatively modulating BCL2-associated transcription factor 1 (BCLAF1). We prove that the miR-194-5p/BCLAF1 equilibrium regulates differentiation, survival and self-renewal of normal progenitors and acute myeloid leukemia (AML) blasts. This equilibrium is perturbed in AMLs resulting in highly expressed BCLAF1, suppression of miR194-5p, consequently, locking cells into an immature, potentially ‘immortal’ state. HDACis reverse this scenario relocating BCLAF1 from the nucleus to a peri-membrane ring-like cytoplasmic structure, sensitizing the cells to differentiation or apoptosis. miR-194-5p and BCLAF1 are significantly deregulated in a cohort of 60 primary AMLs and get restored by HDACi. Our findings connect responsiveness to treatment to re-instatement of miR-194-5p/BCLAF1 balance. These findings might be exploited for (epi-based) anti-leukemia therapy.

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U937 scramble vs shHDAC2 upon SAHA (Vorinostat; suberoylanilide hydroxamic acid) treatment

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