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Modulation of the transcriptional response to TNF-alpha in the human melanoma cell line MZ7 by MITF

ABSTRACT: 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). The experiment was performed as biological duplicate. As MITF is critical for melanoma cell state control, we aimed to explore how MITF expression intersects with inflammation-induced plasticity pathways in melanoma.

ORGANISM(S): Homo sapiens

PROVIDER: GSE71798 | GEO | 2015/10/29

SECONDARY ACCESSION(S): PRJNA292099

REPOSITORIES: GEO

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Modulation of the transcriptional response to TNF-alpha in the human melanoma cell line MZ7 by MITF

Project description: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). The experiment was performed as biological duplicate. As MITF is critical for melanoma cell state control, we aimed to explore how MITF expression intersects with inflammation-induced plasticity pathways in melanoma. Total RNA was obtained from siRNA/TNF-treated MZ7 melanoma cell lines at various conditions and global gene expression profiling was done using the Illumina Human HT12 v4 platform.

2015-10-29 | E-GEOD-71798 | biostudies-arrayexpress

Identification of c-Jun dependent genes downstream of acute MITF loss in the context of inflammatory signals in the human melanoma cell line Ma-Mel-15

Project description: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.

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Identification of c-Jun dependent genes downstream of acute MITF loss in the context of inflammatory signals in the human melanoma cell line Ma-Mel-15

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Identification of MITF-regulated genes in the human melanoma cell line Ma-Mel-15

Project description: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. We aimed to determine novel markers and pathways of melanoma cell plasticity.

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Identification of MITF-regulated genes in the human melanoma cell line Ma-Mel-15

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Transcription profiling of human HeLa cells in response to IKAP/hELP1 siRNA transfection and/or tumor necrosis factor-a treatment

Project description:HeLa cells were un-transfected or transfected with specific siRNAs (20µM) targeting IKAP/hELP1 or non-specific siRNAs against GFP. Same experiment was done by stimulating the cells for 1 hour with TNF-a (200U/ml). conditions: 1/untransfected 2/siRNAs IKAP 3/untransfected + TNF-a 200U/ml 1h 4/siRNAs IKAP + TNF-a 200U/ml 1h 5/siRNAs GFP + TNF-a 200U/ml 1h

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Silencing KDM3A in MCF7 cells to study expression and alternative splicing

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siRNA-mediated knockdown of MITF and PAX3 in metastatic melanoma cell lines

Project description:The transcription factors PAX3 and MITF are required for the development of the neural crest and melanocyte lineage, and both proteins play important roles in melanoma cell growth and survival. PAX3 transcriptionally activates MITF expression during neural crest development, but the relationship between these transcription factors during melanocyte development and in melanoma cells is currently poorly understood. This study aimed to further our understanding of the interaction between transcriptional networks controlled by PAX3 and MITF by assessing the effect of siRNA-mediated knockdown of PAX3 and MITF in metastatic melanoma cell lines. The goals of this study were to determine (i) if PAX3 is required for maintaining expression of MITF in melanoma and melanocyte cell lines; (ii) whether PAX3 and MITF independently, or redundantly, influence growth and survival in melanoma cell lines; and (iii) to investigate the respective roles of PAX3 and MITF expression in melanoma cell differentiation. Microarrays were used to measure global changes in transcript expression in response to siRNA-mediated knockdown of PAX3 or MITF compared to non-targeting controls in two metastatic melanoma cells lines. RNA was isolated from two different metastatic melanoma cell lines 30 hours after one of four different treaments: (i) transfection with siRNA targeting PAX3; or (ii) transfection with siRNA targeting MITF; or (iii) or transfection with siRNA targeting luciferase (non-targeting negative control); or (iv) treatment with media only (control). Therefore, eight samples were used for gene expression profiling by using GeneChip arrays, with one replicate per cell line per treatment.

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siRNA-mediated knockdown of MITF and PAX3 in metastatic melanoma cell lines

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List of TIAM1 differentially expressed genes in SW620 cells [RNA-seq]

Project description:The T lymphoma invasion and metastasis inducing protein 1 (TIAM1) is a guanine nucleotide exchange factor (GEF) that activates the small GTPase RAC1 and regulates a plethora of functions such as cell proliferation, migration, apoptosis and polarity. Recently, we demonstrated that TIAM1 shuttles between the cytoplasm and nucleus. To determine the nuclear role of TIAM1, we performed RNA-seq on SW620 cells transfected either with a specific pre-validated siRNA for TIAM1 (siTIAM1) or a negative control siRNA (siNT) and generated a list of TIAM1 differentially expressed genes. GSEA revealed significant enrichment among TIAM1-regulated genes for YAP-associated molecular signature. To investigate the interplay of TIAM1 with YAP/TAZ we used RNA-seq, generated a list of YAP/TAZ differentially expressed genes from SW620 cells transfected either with specific siRNAs for YAP/TAZ or a negative control siRNA and compared it with the siTIAM1 RNA-seq dataset. Interestingly, we found that 50% of the TAZ/YAP regulated genes were also TIAM1 dependent.

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