In vitro cell cultures are frequently used to define the molecular background of drug resistance. In this study our major aim was to compare the gene expression signature of 2D and 3D cultured BRAFV600E mutant melanoma cell lines. We successfully developed BRAF-drug resistant cell lines from paired primary/metastatic melanoma cell lines in both 2D and 3D in vitro cultures. Using Affymetrix Human Gene 1.0 ST arrays, we determined the gene expression pattern of all cell lines. Our study highlights gene expression alterations that might help to understand the development of acquired resistance in melanoma cells in tumour tissue.
Gene Expression Signature of BRAF Inhibitor Resistant Melanoma Spheroids.
Specimen part
View SamplesWe generated four drug-resistant melanoma cell lines from paired primary/metastatic cell lines using PLX4720 and used for Affymetrix Human Gene 1.0 ST array
Molecular alterations associated with acquired resistance to BRAFV600E targeted therapy in melanoma cells.
Cell line
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Altered integrin expression patterns shown by microarray in human cutaneous melanoma.
Specimen part, Disease, Cell line
View SamplesMetastatic process is considered the predominant cause of melanoma-specific death, decreasing survival dramatically, and resulting in difficulties in the effective treatment. Large variety of molecular pathways associated with disease development and progression suggests that no individual molecular alteration is crucial in these processes per se.
Altered integrin expression patterns shown by microarray in human cutaneous melanoma.
Specimen part, Disease, Cell line
View SamplesNearly all colorectal cancers have dysregulated Wnt signalling, predominantly through the mutation of the Apc (Adenomatous Polyposis Coli) gene. Therefore it is of vital importance to elucidate the key Wnt target genes in intestinal cells in vivo. We have used a novel inducible cre-lox based murine system (designated ApcFlox) to investigate the consequences of perturbation of Wnt signalling following inactivation of Apc in vivo within 100% of the intestinal epithelium. We have employed microarray analysis at 3 time points within our ApcFlox system (Day 3 prior to the onset of phenotype, day 4 the establishment of the phenotype and day 5 gross phenotype of altered proliferation, differentiation and migration) and from adenomas arising in the ApcMin/+ background allowing us characterise Wnt/beta-catenin target genes based on their expression profiles during different stages of intestinal tumourigenesis. Furthermore, we have employed microarray analysis using livers from our ApcFlox system and have demonstrated that there is very little overlap in the Wnt target genes induced by Apc loss in the liver and the intestine. More importantly, we have been able to determine a novel set of putative Wnt/beta-catenin target genes which are upregulated at both early and late stages of tumourigenesis in the intestine and may represent novel therapeutic targets in colon cancer.
Hunk/Mak-v is a negative regulator of intestinal cell proliferation.
Specimen part
View SamplesBiomarkers of osteoarthritis (OA) that can accurately diagnose the disease at the earliest stage would significantly support efforts to develop treatments for prevention and early intervention. The different stages of disease progression are described by the complex pattern of transcriptional regulations. The dynamics in pattern alterations were monitored in each individual animal during the time-course of OA progression.
Blood Transcriptional Signatures for Disease Progression in a Rat Model of Osteoarthritis.
Treatment
View SamplesChronic opiate use produces molecular and cellular adaptations in the nervous system, leading to tolerance, physical dependence and addiction. Genome-wide comparison of morphine-induced changes in brain transcription of mouse strains with different opioid-related phenotypes provides an opportunity to discover the relationship between gene expression and behavioral response to the drug.
Morphine effects on striatal transcriptome in mice.
No sample metadata fields
View SamplesTo identify molecular effects of chronic drug treatment, heroin and methamphetamine treated animals were compared with saline treated animals at multiple time-points using microarray technology. Gene expression profile was assessed 14 h after the last dose of 1, 3, 6 or 12 days drug treatment and after 13, 15, 18 or 24 days of withdrawal.
Common transcriptional effects in the mouse striatum following chronic treatment with heroin and methamphetamine.
Specimen part, Compound
View SamplesChronic exposure to opioids induces adaptations in brain function that lead to the formation of the behavioral and physiological symptoms of drug dependence and addiction.
Behavioral and transcriptional patterns of protracted opioid self-administration in mice.
Specimen part
View SamplesDifferences between groups of children with obesity and healthy controls.
Looking for new diagnostic tools and biomarkers of hypertension in obese pediatric patients.
Specimen part, Disease
View Samples