GEO DataSets

(Submitter supplied) We have used lentiviral shRNA vectors to generate pools of melanoma cells (1205Lu and WM9) stably knocked down for ILEI (FAM3C).

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL15207

18 Samples

Download data: CEL

(Submitter supplied) Metastatic melanoma is hallmarked by its ability to switch oncogenic MITF expression. Here we tested the impact of STAT3 on melanoma onset and progression in association with MITF expression levels. We established a mouse melanoma model for deleting Stat3 specifically in melanocytes with specific expression of human hyperactive NRASQ61K in an Ink4a deficient background. Mice with tissue specific Stat3 deletion showed an early onset of disease, but displayed significantly diminished lung metastasis. more...

Organism:

Mus musculus

Type:

Genome binding/occupancy profiling by high throughput sequencing

Platform:

GPL21103

8 Samples

Download data: BIGWIG, CSV, NARROWPEAK

(Submitter supplied) Melanoma tumors are highly heterogeneous, comprising of different cell types that vary in their potential for growth and invasion. Heterogeneous expression of the Microphthalmia-associated Transcription Factor (MITF) and the POU domain transcription factor BRN2 (POU3F2) has been found in malignant melanoma. Changing expression of these transcription factors as the disease progresses has been linked to the metastatic mechanism of phenotype switching. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL10558

24 Samples

Download data: TXT

(Submitter supplied) This SuperSeries is composed of the SubSeries listed below.

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platform:

GPL20301

60 Samples

Download data

(Submitter supplied) In vivo, melanoma cells transition though distinct phenotypic states in response to a changing microenvironment, and most notably can switch between invasive and proliferative phenotypes characterized by high and low levels of MITF activity (Hoek and Goding, 2010; Hoek et al., 2008). Since melanoma cell lines isolated from human tumors tend also to fall into either proliferative or invasive, slow-growing phenotypes (Hoek et al., 2006), it seems likely that established lines reflect specific phenotypic states within tumors, including those detected using single cell RNA-seq, that are then fixed and maintained under nutrient–rich culture conditions where the microenvironmental stresses encountered in vivo are absent. more...

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platform:

GPL20301

24 Samples

Download data: TXT

(Submitter supplied) Phenotypic and metabolic heterogeneity within tumors is a major barrier to effective cancer therapy. Yet how metabolism is implicated in specific phenotypes, and whether lineage-restricted mechanisms control key metabolic vulnerabilities remains poorly understood. In melanoma, down-regulation of the lineage addiction oncogene Microphthalmia-associated Transcription Factor (MITF) is a hallmark of the proliferative-to-invasive phenotype switch, though how MITF promotes proliferation and suppresses invasion is poorly defined. more...

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platform:

GPL20301

36 Samples

Download data: TXT, XLSX

(Submitter supplied) To assess the effects of permanent loss of MITF in melanoma cells, we used the clustered regularly interspaced short palindromic repeats (CRISPR)-Cas9 technique to generate MITF knockout (KO) cell lines in the human hypo-tetraploid SkMel28 melanoma cell line (containing four copies of MITF). We targeted exon 6 (containing the DNA binding domain) of MITF the resulting isogenic cell line is hereafter referred to as ΔMITF-X6. more...

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platforms:

GPL24676 GPL16791

20 Samples

Download data: H5

(Submitter supplied) TFAP2A and MITF binding sites were identified in SK-MEL-28 cell lines using Cleavage Under Targets and Release Using Nuclease (CUT&RUN).

Organism:

Homo sapiens

Type:

Genome binding/occupancy profiling by high throughput sequencing

Platform:

GPL24676

6 Samples

Download data: BW

(Submitter supplied) Malignant melanoma is an aggressive cancer known for its notorious resistance to most current therapies. The basic helix-loop-helix microphthalmia transcription factor (MITF) is the master regulator determining the identity and properties of the melanocyte lineage, and is regarded as a lineage-specific ‘oncogene’ that has a critical role in the pathogenesis of melanoma. MITF promotes melanoma cell proliferation, whereas sustained supression of MITF expression leads to senescence. more...

Organism:

Homo sapiens

Type:

Genome binding/occupancy profiling by high throughput sequencing

Platform:

GPL10999

4 Samples

Download data: BED

(Submitter supplied) The molecular biology of metastatic potential in melanoma has been studied many times previously and changes in the expression of many genes have been linked to metastatic behaviour. What is lacking is a systematic characterization of the regulatory relationships between genes whose expression is related to metastatic potential. Such a characterization would produce a molecular taxonomy for melanoma which could feasibly be used to identify epigenetic mechanisms behind changes in metastatic behaviour. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL570

45 Samples

Download data

(Submitter supplied) Melanomas are often infiltrated by activated inflammatory cells. Thus, melanoma cells are very likely stimulated by inflammatory cytokines. In order to assess the impact of common inflammatory cytokines, we investigated the gene expression profile of melanoma cell lines before and after cytokine treatment in vitro.

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL571

20 Samples

Download data: CEL

(Submitter supplied) Melanoma cell lines were assessed for differences in gene expression patterns between the lines sensitive and resistant to BRAF and MEK inhibitor drugs.

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL6244

46 Samples

Download data: CEL

(Submitter supplied) The primary cause of cancer deaths is metastasis. While studies have identified multiple signals that drive invasiveness, the first step in metastatic colonisation, the reason for cells to move away from the primary tumor is less well understood. Salubrinal inhibits an eIF2-alpha phosphatase and consequently leads to increase eIF2-alpha phosphorylation and inhibition of the eIF2B translation initiation factor, leading to reprogramming of translation. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL10558

15 Samples

Download data: TXT

(Submitter supplied) The primary cause of cancer deaths is metastasis. While studies have identified multiple signals that drive invasiveness, the first step in metastatic colonization, the reason for cells to move away from the primary tumor is less well understood. The dataset presented here examines the effect of different culture conditions on gene expression by comparing expression of a melanoma cell line in nutrient rich DMEM to MEM. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL10558

12 Samples

Download data: TXT

(Submitter supplied) Adoptive cell therapies (ACT) with cytotoxic T-cell targeting melanocytic antigens can achieve remissions in metastatic melanoma patients, but tumours frequently relapse. To study the underlying mechanisms of resistance we have generated a genetically engineered mouse melanoma model that faithfully recapitulates tumour regression, remission and relapse as seen in patients. HCmel3 mouse melanoma cells were injected into syngneic C57/BL6 (H-2b) mice. more...

Organism:

Mus musculus

Type:

Expression profiling by array

Platform:

GPL6887

21 Samples

Download data: TXT

(Submitter supplied) The MITF-low melanoma transcriptional signature is predictive of poor outcome for patients but little is known about its biological signature. We used genetic models of zebrafish with low expression of mitfa (MITF-low) to study this biological subtype. Using genetic inhibition of MITF activity we discover minimal residual disease at the site of regression. We performed single cell RNA-seq (Smart-seq2) to characterise cells at the site of residual disease, and put in relation with primary tumours and recurring disease.

Organism:

Danio rerio

Type:

Expression profiling by high throughput sequencing

Platform:

GPL18413

332 Samples

Download data: TXT

(Submitter supplied) The MITF-low melanoma transcriptional signature is predictive of poor outcome for patients but little is known about its biological signature. We used genetic models of zebrafish with low expression of mitfa (MITF-low) to study this biological subtype. We performed whole bulk RNA-seq to classify zebrafish MITF-low melanoma that cluster mainly by their directionality of growth and assess their resemblance to patients’ MITF-low subgroups. more...

Organism:

Danio rerio

Type:

Expression profiling by high throughput sequencing

Platforms:

GPL20828 GPL18413

140 Samples

Download data: TXT

(Submitter supplied) Ma-Mel-15 human melanoma cell cultures were transiently transfected (RNAiMax, Lipofectamin) with control siRNA, siRNA against MITF (pool of 4 siRNAs), siRNA against c-JUN (pool of 4 siRNAs) or combinations of siMITF and siJUN. Cells were then either treated with TNF-alpha (1000U/ml) for 24 hours or left untreated. The experiment was performed as biological duplicates. We aimed to determine how c-JUN cooperates with acute MITF-loss in human melanoma cells to increase inflammatory responsiveness and cell plasticity.

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL10558

16 Samples

Download data: TXT

(Submitter supplied) We analyzed the transcriptional response of the human melanoma cell line Ma-Mel-15 either transfected with control siRNA (siNT = non-targeting siRNA) or transfected with siRNAs (pool of 4 active and independent siRNAs) directed against the melanocytic transcription factor and lineage oncogene MITF (Microphthalmia-associated transcription factor). The experiment was performed as biological duplicates and RNA was isolated 48 hours after siRNA transfection. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL10558

4 Samples

Download data: TXT

(Submitter supplied) We analyzed the transcriptional response of the human melanoma cell line MZ7 to TNF-alpha (24 hours) in a dose-dependent manner (TNF-alpha 10U/ml, 100U/ml, 1000U/ml) either transfected with control siRNA (siNT = non-targeting siRNA) or transfected with siRNAs (pool of 4 active and independent siRNAs) against the melanocytic transcription factor and lineage oncogene MITF. (Microphthalmia-associated transcription factor). more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL10558

16 Samples

Download data: TXT