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Transcriptomic analysis of Notch (N) induced [NΔecd] Drosophila larval primary CNS tumours vs N allograft tumours in w1118 host flies

ABSTRACT: The goal of this project was to compare NGS derived transciptional profiles of primary larval CNS tumours and allograft tumours from two stages (first-T0 and forth-T3) in Drosophila that are induced by overactivation of N pathway in order to decipher if N regulates similar or different sets of genes as primary hypeplasias transition to malignant tumours. The results of this study show that overactivation of N negatively regulates genes related to neuronal differentiation processes genes as N hyperplasias become more malignant and that genes related to stress, metabolsim and immunity are upregulated

ORGANISM(S): Drosophila melanogaster

PROVIDER: GSE219067 | GEO | 2023/05/30

REPOSITORIES: GEO

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Transcriptomic analysis of HES induced [E(spl)mγ and dpn; DM] Drosophila larval primary CNS tumours vs HES allograft tumours in w1118 host flies

Project description:The goal of this project was to compare NGS derived transciptional profiles of primary larval CNS tumours and allograft tumours from two stages (first-T0 and forth-T3) in Drosophila that are induced by overactivation of two HES genes [E(spl)mγ and dpn;DM] in order to decipher if these two Hes genes control similar or different sets of genes as primary hypeplasias transition to malignant tumours. The results of this study show that overactivation of DM continues to negatively regulate neuronal differentiation genes as the DM hyperplasias become more malignant and that genes related to stress and metabolsim are upregulated

2021-09-01 | GSE179507 | GEO

Transcriptomic dysregulation in aggressive and malignant prolactin tumours

Project description:Pituitary tumours are generally benign. However, many are invasive and some of these are aggressive with high proliferation and recurrence rates. Only metastatic tumours are considered malignant and are rare (0.2%). To identify molecular events associated with the aggressive and malignant phenotypes, we combined a comparative genomic hybridization and transcriptomic analysis of 13 prolactin (PRL) tumours classified as non-invasive (NI; n=5), invasive (I; n=2) or aggressive-invasive (AI; n=6). Each tumour showed copy number alterations which appeared to be varied and discrete in the NI and I tumour groups, and more numerous and extensive in the AI tumour group. Allelic loss within the p arm region of chromosome 11 was detected in five of the AI tumours. This region contains the cytobands 11p15.2, 11p15.1, 11p14.3, 11p14.2, 11p14.1, 11p13, 11p12 and 11p11.2. Furthermore, an allelic loss in the 11q arm was also observed in three of these five tumours, which were considered malignant based on the presence of metastases. The comparison of genomic and transcriptomic data showed that allelic loss impacted upon the expression of genes located in the imbalanced region. An original data filtering strategy allowed us to highlight five genes (DGKZ, CD44, TSG101, GTF2H1 and HTATIP2), within the missing 11p region, potentially responsible for triggering the aggressive and malignant phenotypes of PRL tumours. Our novel combined genomic and transcriptomic analysis underlines the importance of chromosome 11 allelic loss in aggressive and malignant PRL tumours and led us to propose a new strategy to find markers of progression in rare tumours.

2011-03-16 | GSE22812 | GEO

Methylation profiling of Malignant Rhabdoid Tumours

Project description:An observational experiment to methylation profile 79 SMARCB1 negative primary tumours from patients diagnosed with Malignant Rhabdoid Tumours.

2020-07-15 | E-MTAB-6708 | biostudies-arrayexpress

Analysis of circulating microRNAs in adrenocortical tumours

Project description:Differential diagnosis of adrenocortical adenoma and carcinoma is of pivotal clinical relevance, as the prognosis and clinical management of benign and malignant adrenocortical tumours is entirely different. Circulating microRNAs are promising biomarker candidates of malignancy in several tumours. In the present study we investigate circulating microRNAs in adrenocortical tumours and to evaluate their potential applicability as biomarkers of malignancy.

2013-11-19 | GSE49674 | GEO

Transcriptomic dysregulation in aggressive and malignant prolactin tumours

2011-03-16 | E-GEOD-22812 | biostudies-arrayexpress

Genomic alterations of chromosome 11 induce transcriptome dysregulation in aggressive and malignant prolactin tumours

Project description:This SuperSeries is composed of the following subset Series: GSE22615: Genomic alterations of chromosome 11 induce transcriptomic dysregulation in aggressive and malignant prolactin tumours GSE22812: Transcriptomic dysregulation in aggressive and malignant prolactin tumours Refer to individual Series

2011-09-15 | E-GEOD-32191 | biostudies-arrayexpress

The DNA methylomes of serous borderline tumours reveal subgroups with malignant-like or benign-like profiles

Project description:Serous borderline tumours (SBOT) are a challenging group of ovarian tumours positioned between benign and malignant disease. We have profiled the DNA methylomes of 12 low grade serous carcinoma (LGSC), 19 SBOT and 16 benign serous tumours (BST) across 27,578 CpG sites to further characterise the epigenomic relationship between these subtypes of ovarian tumours. Unsupervised hierarchical clustering of DNA methylation levels showed that LGSC differ distinctly from BST, however, not from SBOT. Gene ontology analysis of genes showing differential methylation at linked CpG sites between LGSC and BST revealed significant enrichment of gene groups associated with cell adhesion, cell-cell signalling and the extracellular region consistent with a more invasive phenotype of LGSC as compared to BST. Consensus clustering highlighted differences between SBOT methylomes and returned subgroups with malignant-like or benign-like methylation profiles. Furthermore, a two loci DNA methylation signature can distinguish between these SBOT subgroups with benign-like and malignant-like methylation characteristics. Our findings indicate striking similarities between SBOT and LGSC methylomes which supports a common origin and the view that LGSC may arise from SBOT. A subgroup of SBOT can be classified into tumours with a benign-like or a malignant-like methylation profile which may help in identifying tumours more likely to progress into LGSC.

2012-12-31 | GSE40105 | GEO

Analysis of circulating microRNAs in adrenocortical tumours

2013-11-19 | E-GEOD-49674 | biostudies-arrayexpress

KP lung tumours

Project description:KP lung tumours

| PRJNA577056 | ENA

Expression profiling of primitive neuroectodermal tumours

Project description:Primitive neuro-ectodermal tumours (PNET) of the supratentorial region are rare, highly malignant embryonal brain tumours affecting young children. Although supratentorial PNET (sPNET) are histologically similar to infratentorial PNET/medulloblastoma, sPNET have more aggressive clinical phenotypes, which suggest sPNET represents distinct biological entities. In contrast to considerable progress in understanding the signalling pathways involved in medulloblastoma, little is known about sPNET pathogenesis. We utilized the Illumina Human-6 v2 Expression BeadChip platform to define pathways dysregulated in sPNET pathogenesis. Copy number analysis was also performed on an overlapping set of PNET tumours, also available on GEO with accession code GSE14087. Keywords: gene expression, pediatric brain tumour Raw BeadStudio output files (GSE14295_normalization-none*) linked below as Supplementary files. Supplementary File GSE14295_Array2SampleTitle_associations.txt maps Array IDs (e.g., 1814647101_B) to GEO Sample Titles (e.g., PNET2).

2009-12-22 | GSE14295 | GEO

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