Browse
Submit Data
Databases
API
Help

Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

32 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Analysis of melanosomal miRNAs

ABSTRACT: miRNA microarray profiling was performed for MNT-1 cells, pre-mature and mature melanosomes extracted from MNT-1 cells. In order to reveal the miRNAs that are most abundant in mature melanosomes, the most highly expressed miRNAs from mature melanosomes were compared with expression levels in pre-mature melanosomes. The analysis revealed five miRNAs that were highly expressed in mature melanosomes and had been previously associated with melanoma. Total RNA was extracted from MNT-1 cells (2 replicates), pre-mature and mature melanosomes. The melanosomes were either treated with RNase prior to RNA extraction (2 replicates each) or untreated (1 replicate each). Melanosomes were extracted from MNT-1 melanoma cells by sucrose-based density gradient ultracentrifugation. The treatment of melanosomes with RNase prior to RNA extraction was performed in order to remove any kind of RNA that may interact with or stick unspecifically to the outer side of the melanosome membrane. After 10 mins of RNAse treatment, RNase inhibitor was added. The samples of MNT-1 cells and untreated melanosomes were considered for the normalization, but not for further analyses. Microarray Unit of the Core Facility Genomics and Proteomics DKFZ

ORGANISM(S): Homo sapiens

SUBMITTER: Carmit Levy

PROVIDER: E-GEOD-72337 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

ACCESS DATA

Json Xml

Similar Datasets

Analysis of melanosomal, exosomal and cellular miRNAs of melanoma cells

Project description:miRNA microarray profiling was performed for exosomes and secreted melanosomes of MNT-1 cells as well as WM3682 and WM3314 cells and melanosomes isolated from cell homogenates. The aim of this study is to compare the miRNA content of exosomes and secreted melanosomes and to assess differences in the miRNA profiles of different melanoma cell lines and their melanosomes. Total RNA was extracted from MNT-1 exosomes and secreted melanosomes (2 replicates each) that were isolated from the conditioned medium of MNT-1 melanoma cells by differential ultracentrifugation. In addition, total RNA was isolated from WM3682 and WM3314 melanoma cells and melanosomes (1 replicate each). These latter melanosomes were isolated from cell homogenates by filtration through a 0.45 Âµm filter, followed by FACS sorting. Contributor: Microarray Unit of the Core Facility Genomics and Proteomics DKFZ

2016-08-09 | E-GEOD-79411 | biostudies-arrayexpress

Analysis of melanosomal miRNAs

Project description:miRNA microarray profiling was performed for MNT-1 cells, pre-mature and mature melanosomes extracted from MNT-1 cells. In order to reveal the miRNAs that are most abundant in mature melanosomes, the most highly expressed miRNAs from mature melanosomes were compared with expression levels in pre-mature melanosomes. The analysis revealed five miRNAs that were highly expressed in mature melanosomes and had been previously associated with melanoma.

2016-08-09 | GSE72337 | GEO

Expression profiling of fibroblasts treated with melanosomes

Project description:mRNA profiling was performed on primary fibroblasts treated with melanosomes and untreated fibroblasts as control. The aim of this study was to explore whether melanoma-derived mature melanosomes functionally affect primary fibroblasts. A functional gene set enrichment analysis based on the resulting mRNA profiles predicted that an uptake of mature melanosomes by fibroblasts causes increased cell proliferation and cell motility. Expression profiling was performed for 3 replicates of primary human fibroblasts that were treated with mature melanosomes, 1 replicate of fibroblasts treated with early melanosomes and 3 replicates of untreated fibroblasts as controls. Melanosomes were extracted from the human melanoma cell line MNT-1. Fibroblasts were treated with melanosomes for 24h. Fold changes were calculed for fibroblasts treated with mature melanosomes vs. controls. The sample of fibroblasts treated with early melanosomes was considered for the normalization, but not for further analyses. Microarray Unit of the Core Facility Genomics and Proteomics DKFZ

2016-08-09 | E-GEOD-72229 | biostudies-arrayexpress

Human - Cells and Extracellular vesicles of Hela and MNT-1 WT vs CD63 KO Proteomes 1

Project description:CD63 is a tetraspanin, which organize on cholesterol enriched microdomains, especially on late endosomes. Previous work of our team has shown that CD63 could regulate the sorting of cargoes into ILVs through an ESCRT-independent manner in melanocytes. However, CD63 has also been involved in other trafficking events in other cell type and so far, we have no clear idea of the general process that CD63 would control and would unify these disparate reports. In order to elucidate to general role of CD63 we compared two cell lines, Hela and MNT-1 that we Knock-out for CD63 by CRISPR in both cell lines and investigated the EV generation and the expression level of proteins involved in this process in cell lysates and the EV pellet obtained by SEC.

2024-04-19 | PXD037146 | Pride

Human - Cells and Extracellular vesicles of Hela and MNT-1 WT vs CD63 KO Proteomes 2

2024-04-19 | PXD037147 | Pride

Expression data from skeletal muscles of flies with muscle-specific overexpression of Foxo or Mnt

Project description:Skeletal muscle senescence influences whole organism aging, yet little is known on the relay of pro-longevity signals from muscles to other tissues. We performed an RNAi screen in Drosophila for muscle-released cytokines ('myokines') regulating lifespan and identified Myoglianin, the homolog of human Myostatin. Myoglianin is induced in skeletal muscles by the transcription factor Mnt and together they constitute an inter-organ signaling module that regulates lifespan, age-related muscle dysfunction, and protein synthesis across aging tissues. Both Mnt and Myoglianin activate already in young age the protective decline in protein synthesis that is typical of old age, while knock-down of Myoglianin impairs this process. Mechanistically, Mnt decreases the expression of nucleolar components in muscles while also decreasing nucleolar size in distant tissues via Myostatin/p38 MAPK signaling. Our results highlight a myokine-dependent inter-organ longevity pathway that coordinates nucleolar function and protein synthesis across aging tissues. Affymetrix microarrays were used to evaluate genome-wide expression in skeletal muscles of flies with muscle-specific overexpression of FOXO or Mnt (Affymetrix Drosophila Genome 2.0 Array). This design allowed us to identify genes and pathways induced by overexpression of FOXO and/or Mnt, and enabled us to address the degree to which FOXO-induced pathways were independent of those induced by Mnt. Three independent biological replicates from each of three groups (control, UAS-Foxo and UAS-Mnt)

2014-07-02 | E-GEOD-39877 | biostudies-arrayexpress

Proteomic analysis of MNT-1 cells deficient in NPC1 protein

Project description:A novel MNT-1 cell line deficient in NPC1 protein was generated using CRISPR/CAS9 knock-out method. In the absence of the NPC1 protein the pigmentation status of the cells was changed and alterations in the melanogenesis process were observed. In order to characterize the role of NPC1 protein in the pigmentation process we compared the proteome of the MNT-1 WT cell line with the NPC1-KO cell line.

2023-07-24 | PXD042762 | Pride

Human - Cells and Extracellular vesicles of Hela and MNT-1 WT vs CD63 KO Exosomes

2024-04-19 | PXD037149 | Pride

Differential regulation of aggressive features in melanoma cells by members of the miR-17-92 complex

Project description:The various roles of microRNAs (miRNAs) in controlling the phenotype of cancer cells are the focus of contemporary research efforts. We have recently shown that miR-17 directly targets the ADAR1 gene and thereby enhances melanoma cell aggressiveness. miR-17 and miR-20a belong to the miR-17/92 complex, and their mature forms are identical except for two non-seed nucleotides. Nevertheless, here we show that these two miRNAs carry markedly different effects on melanoma cells. A strong positive correlation was observed between the expression of miR-17 and miR-20a among various melanoma cultures. Luciferase assays showed that miR-17 but not miR-20a directly targets the 3' untranslated region of the ADAR1 gene. Ectopic expression of these miRNAs in melanoma cells differentially alters the expression of five exemplar TargetScan-predicted target genes ADAR1, ITGB8, TGFBR2, MMP2 and VEGF-A. Whole genome expression microarrays confirm a markedly differential effect on the transcriptome. Functionally, over-expression of miR-20a but not of miR-17 in melanoma cells inhibits net proliferation in-vitro. The differential functional effect was observed following ectopic expression of the mature miRNA or of the pre-miRNA sequences. This suggests that the two non-seed nucleotides dictate target sequence recognition and overall functional relevance. These miRNAs are clearly not redundant in melanoma cell biology.

2014-12-31 | GSE57158 | GEO

miRNAs associated with the different human Argonaute proteins

Project description:microRNAs (miRNAs) are small non-coding RNAs that function in literally all cellular processes. miRNAs interact with Argonaute (Ago) proteins and guide them to specific target sites located in the 3’ untranslated region (UTR) of target mRNAs leading to translational repression and deadenylation-induced mRNA degradation. Most miRNAs are processed from hairpin-structured precursors by the consecutive action of the RNase III enzymes Drosha and Dicer. However, processing of miR-451 is Dicer-independent and cleavage is mediated by the endonuclease Ago2. Here we have characterized miR-451 sequence and structure requirements for processing as well as sorting of miRNAs into different Ago proteins. Pre-miR-451 appears to be optimized for Ago2 cleavage and changes result in reduced processing. In addition, we show that the mature miR-451 only associates with Ago2 suggesting that mature miRNAs are not exchanged between different members of the Ago protein family. Based on cloning and deep sequencing of endogenous miRNAs associated with Ago1-3, we do not find evidence for miRNA sorting in human cells. However, Ago identity appears to influence the length of some miRNAs, while others remain unaffected. Examination of miRNAs associated with endogenous human Ago1-4 in HeLa cells

2013-03-29 | E-GEOD-45506 | biostudies-arrayexpress

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data