BRAF inhibition in RAS-mutant premalignant lymphatic cells
Ontology highlight
ABSTRACT:
PROVIDER: PRJEB36480 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| ERR3977960_1.fastq.gz | Fastqsanger.gz | |||
| ERR3977960_2.fastq.gz | Fastqsanger.gz | |||
| ERR3978160_1.fastq.gz | Fastqsanger.gz | |||
| ERR3978160_2.fastq.gz | Fastqsanger.gz | |||
| ERR3978170_1.fastq.gz | Fastqsanger.gz |
Items per page: 5 1 - 5 of 48 |
Similar Datasets
Project description:RAF-family kinases are activated by recruitment to the plasma membrane by GTP-bound RAS, where they initiate signaling through the MAP kinase cascade. Here we crosslinked (BS3), digested (trypsin), and analyzed via LC-MS/MS KRAS (human, residues 1-169) bound to intact BRAF (human) in an autoinhibited state with MEK1 (human, ) and a 14-3-3 (SF9) dimer . Analysis of this KRAS/BRAF/MEK1/14-3-3 complex reveals both interprotein and intraprotein crosslinks.
2023-10-24 | PXD042584 | Pride
Project description:HDX-MS data on bRaf, bRaf/Cdc37 and bRaf/Cdc37/Hsp90 protein complexes
2022-01-04 | MSV000088635 | MassIVE
Project description:CONTEXT: BRAF V600E mutation (BRAF-mut.) confers aggressiveness in papillary thyroid carcinoma, but unidentified genomic abnormalities may be required for full phenotypic expression. OBJECTIVE: To perform deep sequencing to identify genes differentially expressed between BRAF-mut. and BRAF-wild-type (BRAF-WT) tumors, and to compare to patient clinical status. DESIGN: BRAF-mut. and BRAF-WT tumors were identified in patients with T1N0 and with T23N1 tumors. Expression levels of genes were determined from RNA sequencing (RNA-Seq) data and fusion transcripts were detected. NanoString was used to validate the RNA-Seq data for immune genes. SETTING: Patients were seen at two sites of a major referral medical center. PATIENTS: Twenty patients were studied. BRAF-mut. patients included 9 women, 3 men; 9 were TNM stage I and 3 were stage III; 3 (25%) had lymphocytic thyroiditis. BRAF-WT included 5 women; 3 men; all were stage I; 5 (62.5%) had lymphocytic thyroiditis. RESULTS: 560 of 13,085 genes were differentially expressed by RNA-Seq, and MetaCore analysis identified 55 immune function genes that were differentially expressed as a function of BRAF mutational status. Immune function genes were broadly underexpressed in BRAF-mut. tumors, with only 4 genes (HLA-G, CXCL14, TIMP1, IL1RAP) more highly expressed. NanoString validated the RNA Seq data for immune genes. Eleven high confidence fusion transcripts were detected, four being inter-chromosomal and seven intra-chromosomal. CONCLUSION: BRAF-mut. papillary thyroid cancers have less expression of immune and inflammatory response genes than BRAF-WT tumors. Thirteen of 20 (65%) tumors had between one and three fusion transcripts. Functional studies will be required to determine the potential role of the newly identified genomic abnormalities in contributing to the aggressiveness of BRAF-mut. and wild-type tumors. RNA-seq was performed on 20 thyroid carcinoma tumors
2015-07-01 | E-GEOD-48953 | biostudies-arrayexpress
Project description:Fifty percent of cutaneous melanomas are driven by activated BRAFV600E, but tumors treated with RAF inhibitors, even when they respond dramatically, rapidly adapt and develop resistance. Thus, there is a pressing need to identify the major mechanisms of intrinsic and adaptive resistance and develop drug combinations that target these resistance mechanisms. In a combinatorial drug screen on a panel of 12 treatment-naïve BRAFV600E mutant melanoma cell lines of varying levels of resistance to MAPK pathway inhibition we identified the combination PLX4720, a targeted inhibitor of mutated BRaf, and lapatinib, an inhibitor of the ERBB family of receptor tyrosine kinases, as synergistically cytotoxic in the subset of cell lines that displayed the most resistance to PLX4720. To identify potential mechanisms of resistance to PLX4720 treatment and synergy with lapatinib treatment we performed a multi-platform functional genomics analysis to profile the genome as well as the transcriptional and proteomic responses of these cell lines to treatment with PLX4720. We found modest levels of resistance correlated with the zygosity of the BRAF V600E allele and RTK mutational status. Layered over base-line resistance was substantial upregulation of many ERBB pathway genes in response to BRaf inhibition, thus generating the vulnerability to combination with lapatinib. The transcriptional responses of ERBB pathway genes are associated with a number of transcription factors, including ETS2 and its associated cofactors that represent a convergent regulatory mechanism conferring synergistic drug susceptibility in the context of diverse mutational landscapes. 12 BRAF mutant melanomas and 4 melanomas with WT BRAF were exposed plx4720 treatment to evaluate their responses after 8 hours of treatment. 5 of the 12 BRAF mutant melanomas responses were also evaluated in response to the treatment of lapatinib alone, masitinib alone, the combination of lapatinib with plx4720, or the combination of masitinib with plx4720. All samples were run in at least triplicate.
2015-09-16 | E-GEOD-68453 | biostudies-arrayexpress
Project description:CONTEXT: BRAF V600E mutation (BRAF-mut.) confers aggressiveness in papillary thyroid carcinoma, but unidentified genomic abnormalities may be required for full phenotypic expression. OBJECTIVE: To perform deep sequencing to identify genes differentially expressed between BRAF-mut. and BRAF-wild-type (BRAF-WT) tumors, and to compare to patient clinical status. DESIGN: BRAF-mut. and BRAF-WT tumors were identified in patients with T1N0 and with T23N1 tumors. Expression levels of genes were determined from RNA sequencing (RNA-Seq) data and fusion transcripts were detected. NanoString was used to validate the RNA-Seq data for immune genes. SETTING: Patients were seen at two sites of a major referral medical center. PATIENTS: Twenty patients were studied. BRAF-mut. patients included 9 women, 3 men; 9 were TNM stage I and 3 were stage III; 3 (25%) had lymphocytic thyroiditis. BRAF-WT included 5 women; 3 men; all were stage I; 5 (62.5%) had lymphocytic thyroiditis. RESULTS: 560 of 13,085 genes were differentially expressed by RNA-Seq, and MetaCore analysis identified 55 immune function genes that were differentially expressed as a function of BRAF mutational status. Immune function genes were broadly underexpressed in BRAF-mut. tumors, with only 4 genes (HLA-G, CXCL14, TIMP1, IL1RAP) more highly expressed. NanoString validated the RNA Seq data for immune genes. Eleven high confidence fusion transcripts were detected, four being inter-chromosomal and seven intra-chromosomal. CONCLUSION: BRAF-mut. papillary thyroid cancers have less expression of immune and inflammatory response genes than BRAF-WT tumors. Thirteen of 20 (65%) tumors had between one and three fusion transcripts. Functional studies will be required to determine the potential role of the newly identified genomic abnormalities in contributing to the aggressiveness of BRAF-mut. and wild-type tumors.
2015-07-01 | GSE48953 | GEO
Project description:Melanoma is the deadliest form of skin cancer with rising incidence and mortality rates. Oncogenic mutation in BRAF gene is the single most frequent genetic alteration in human melanoma; however, this event per se is not sufficient to produce melanoma in vivo. We have investigated whether epigenetic changes, specifically aberrant DNA methylation and dysregulation of gene expression, alone or in combination with this genetic event, are involved in the genesis of human melanoma. We have constructed the whole M-bM-^@M-^XM-bM-^@M-^Xof primary human melanomas in relation to their BRAF mutational status. Our methylation profiling identified a large number of hyper- or hypomethylated genes in melanoma tumors, many of which being novel and having the potential to serve as biomarkers. Gene ontology analysis revealed that gene categories involved in neuronal cell morphology and development, and skin and neurological disorders were highly enriched. Frequently methylated targets included developmental regulatory transcription factors and homeobox genes, which are mostly subjected to bivalent histone marking and Polycomb occupancy in embryonic stem cells. Notably, several genes involved in the MEK-ERK and the PI3K pathways, two of the most frequently perturbed pathways in human melanoma, showed extensive methylation changes. Gene expression profiling identified a long list of dysregulated genes, many of which being involved in melanocytes development and differentiation, and showing concomitant aberrant DNA methylation. Sub-typing of the melanoma tumors based on BRAF mutational status revealed that tumors with a mutated BRAF had distinctive and more pronounced changes in both DNA methylation and gene expression profiles than tumors carrying the wildtype BRAF. The differentially compromised methylome and transcriptome of melanomas (dependent on BRAF mutation) deserves special attention because many epigenetic alterations, including DNA methylation-mediated regulation of gene expression, are potentially reversible. The dichotomous integrity of epigenome in human melanoma holds great promise for the field of personalized medicine. Methylome: Eleven primary human melanoma speciemens versus five normal human melanocyte samples. Transcriptome: Ten primary human melanoma speciemens versus four normal human melanocyte samples
2012-12-31 | E-GEOD-31879 | biostudies-arrayexpress
Project description:BRAF, one of three RAF serine/threonine kinases (ARAF, BRAF and CRAF), plays a major role in the RAS-RAF-MEK-ERK mitogen-activated protein kinase (MAPK) signaling pathway, which mediates cellular responses to growth signals. Recently a high frequency (~60%-70%) of activating BRAF mutations (predominantly V600E) has been reported in malignant melanoma. In order to identify the downstream effects of BRAF signaling on melanoma cell growth and gene expression, cDNA microarray analysis was carried out following BRAF siRNA or MEK1/2 inhibitor (U0126) treatment. Keywords: time series, siRNA time series, siRNA, drug treatment
2013-07-07 | E-GEOD-5481 | biostudies-arrayexpress
Project description:BRAF, one of three RAF serine/threonine kinases (ARAF, BRAF and CRAF), plays a major role in the RAS-RAF-MEK-ERK mitogen-activated protein kinase (MAPK) signaling pathway, which mediates cellular responses to growth signals. Recently a high frequency (~60%-70%) of activating BRAF mutations (predominantly V600E) has been reported in malignant melanoma. In order to identify the downstream effects of BRAF signaling on melanoma cell growth and gene expression, cDNA microarray analysis was carried out following BRAF siRNA or MEK1/2 inhibitor (U0126) treatment. Keywords: time series, siRNA
2013-07-07 | GSE5481 | GEO
Project description:The genome-wide miRNA expression analysis was performed in clinical samples, comprising 15 BRAF-mutant and 15 non-KRAS/BRAF-mutant colorectal cancers by using a SurePrint G3 Human miRNA microarray. clinical samples, comprising 15 BRAF-mutant and 15 non-KRAS/BRAF-mutant colorectal cancers by using a SurePrint G3 Human miRNA microarray.
2016-04-01 | E-GEOD-66548 | biostudies-arrayexpress
Project description:Melanoma is the deadliest form of skin cancer with rising incidence and mortality rates. Oncogenic mutation in BRAF gene is the single most frequent genetic alteration in human melanoma; however, this event per se is not sufficient to produce melanoma in vivo. We have investigated whether epigenetic changes, specifically aberrant DNA methylation and dysregulation of gene expression, alone or in combination with this genetic event, are involved in the genesis of human melanoma. We have constructed the whole ‘‘of primary human melanomas in relation to their BRAF mutational status. Our methylation profiling identified a large number of hyper- or hypomethylated genes in melanoma tumors, many of which being novel and having the potential to serve as biomarkers. Gene ontology analysis revealed that gene categories involved in neuronal cell morphology and development, and skin and neurological disorders were highly enriched. Frequently methylated targets included developmental regulatory transcription factors and homeobox genes, which are mostly subjected to bivalent histone marking and Polycomb occupancy in embryonic stem cells. Notably, several genes involved in the MEK-ERK and the PI3K pathways, two of the most frequently perturbed pathways in human melanoma, showed extensive methylation changes. Gene expression profiling identified a long list of dysregulated genes, many of which being involved in melanocytes development and differentiation, and showing concomitant aberrant DNA methylation. Sub-typing of the melanoma tumors based on BRAF mutational status revealed that tumors with a mutated BRAF had distinctive and more pronounced changes in both DNA methylation and gene expression profiles than tumors carrying the wildtype BRAF. The differentially compromised methylome and transcriptome of melanomas (dependent on BRAF mutation) deserves special attention because many epigenetic alterations, including DNA methylation-mediated regulation of gene expression, are potentially reversible. The dichotomous integrity of epigenome in human melanoma holds great promise for the field of personalized medicine.
2012-12-31 | GSE31879 | GEO