Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Alterations in PTPN11 and other RAS-/MAP-Kinase pathway genes define ganglioglioma with adverse clinical outcome and atypic histopathological features

ABSTRACT: Genome wide DNA methylation profiling of human low grade epilepsy associated brain tumor tissue. The Illumina Infinium 450K and 850K Human DNA methylation Beadchip was used to obtain DNA methylation profiles across approximately 450.000 and 850.000 CpGs in formalin-fixed paraffin-embedded surgical brain samples. Samples included 280 cases with various brain tumor diagnosis including low grade epilepsy associated tumors and non-epilepsy autopsy controls.

ORGANISM(S): Homo sapiens

PROVIDER: GSE218542 | GEO | 2022/11/30

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

DNA methylation-based classification of MCD in the human brain

Project description:Genome wide DNA methylation profiling of human normal and epileptic brain tissue. The Illumina Infinium 850K Human DNA methylation Beadchip was used to obtain DNA methylation profiles across approximately 850.000 CpGs in formalin-fixed paraffin-embedded surgical brain samples. Samples included 316 cases diagnosed with malformations of cortical development (MCD), non-MCD epilepsy or no-epilepsy autopsy controls.

2021-11-30 | GSE185090 | GEO

Epigenome analysis of low-grade neuroepithelial tumors with FGFR2 fusions

Project description:Genome-wide DNA methylation profiling of 8 low-grade neuroepithelial tumors (LGNET) with FGFR2 fusions with various histologic diagnoses including ganglioglioma, multinodular and vacuolating neuronal tumor (MVNT), low-grade glioneuronal tumor NOS, and polymorphous low-grade neuroepithelial tumor of the young (PLNTY). The Illumina Infinium EPIC 850k Human DNA Methylation Beadchip was used to obtain DNA methylation profiles across approximately 850,000 CpG sites of genomic DNA extracted from formalin-fixed, paraffin-embedded tumor tissue of 8 low-grade neuroepithelial tumors with FGFR2 fusions.

2021-07-27 | GSE172081 | GEO

Etiology matters - Comparing Genomic DNA Methylation Patterns in Three Rat Models of Acquired Epilepsy (TBI – MBD-seq)

Project description:Explore DNA methylation in traumatic brain injury model of epilepsy and its relationship to gene expression. Examination of methylation changes in stimulated rats compared to sham operated animals in traumatic brain injury model of epilepsy.

2016-09-06 | E-GEOD-75119 | biostudies-arrayexpress

DNA methylation and copy number profiling in polymicrogyria

Project description:Polymicrogyria (PMG) is a developmental cortical malformation characterized by an excess of small and frustrane gyration and abnormal cortical lamination. PMG frequently associates with seizures. The molecular pathomechanisms underlying PMG development are not yet understood. About 40 genes have been associated with PMG, and small copy number variations have also been described in selected patients. We recently provided evidence that epilepsy-associated structural brain lesions can be classified based on genomic DNA methylation patterns. Here we analyzed 27 PMG patients employing array-based DNA-methylation profiling on formalin-fixed paraffin-embedded material. A series of 63 well-characterized non-PMG cortical malformations (focal cortical dysplasia type 2a/b and hemimegalencephaly), temporal lobe epilepsy, and non-epilepsy autopsy controls was used as reference cohort. Unsupervised dimensionality reduction and hierarchical cluster analysis of DNA methylation profiles showed that PMG formed a distinct DNA methylation class. Copy number profiling from DNA methylation data identified a uniform duplication spanning the entire long arm of chromosome 1 in 7 out of 27 PMG patients, which was verified by additional fluorescence in situ hybridization analysis. In respective cases about 50% of nuclei in the center of the PMG lesion were 1q triploid. No chromosomal imbalance was seen in adjacent, architecturally normal-appearing tissue indicating mosaicism. Clinically, PMG 1q patients presented with a unilateral frontal or hemispheric PMG without hemimegalencephaly, a severe form of intractable epilepsy with seizure onset in the first months of life, and severe developmental delay. Our results show that PMG can be classified among other structural brain lesions according to their DNA methylation profile. One subset of PMG with distinct clinical features exhibits a duplication of chromosomal arm 1q.

2020-11-18 | GSE156374 | GEO

Genome-wide methylation analyses in glioblastoma multiforme (GBM)

Project description:Our main objective was to study genome-wide differential methylation in de novo glioblastoma multiforme (GBM, grade IV glioma). We evaluated CpG sites in gene promoters of 26,000+ genes using an array-based chip. We retrieved 54 GBM from biorepositories of two institutions(40 from Columbia University and 14 from Case Western Reserve University) and 24 control brain tissues from the New York Brain Bank, which collected control brain tissues from consented subjects without history of neurological diseases at autopsy. Bisulfite modified DNA was extracted from 54 GBM and 24 control brain tissue. The HumanMethylation27 Analysis Bead-Chips (Illumina) were used to interrogate 26,486 informative CpG sites in the autosomes.

2013-10-18 | E-GEOD-50923 | biostudies-arrayexpress

DNA methylation array analysis of high-grade gliomas with pleomorphic and pseudopapillary features

Project description:Genomewide DNA methylation array profiling of 23 previously unpublished CNS tumors resolved into a new entity, high-grade glioma with pleomorphic and pseudopapillary features (HPAP). Tumors demonstrate a variety of histologic diagnoses including glioblastoma (GBM), pleomorphic xanthoastrocytoma (PXA), anaplastic ependymoma, and polymorphous low-grade neuroepithelial tumor of the young (PLNTY). The Illumina Infinium EPIC 850k Human DNA Methylation Beadchip was used to obtain DNA methylation profiles across approximately 850,000 CpG sites of genomic DNA extracted from formalin-fixed, paraffin-embedded tumor tissue.

2022-02-04 | GSE195567 | GEO

Epigenome analysis of low-grade neuroepithelial tumors with FGFR1 alterations

Project description:Genome-wide DNA methylation profiling of 30 low-grade neuroepithelial tumors with FGFR1 alterations including rosette-forming glioneuronal tumor, pilocytic astrocytoma, dysembryoplastic neuroepithelial tumor, and extraventricular neurocytoma. The Illumina Infinium EPIC 850k Human DNA Methylation Beadchip was used to obtain DNA methylation profiles across approximately 850,000 CpG sites of genomic DNA extracted from formalin-fixed, paraffin-embedded tumor tissue of 30 low-grade neuroepithelial tumors with FGFR1 alterations including kinase domain tandem duplication, in-frame fusion with TACC1, and hotspot missense mutation within the intracellular tyrosine kinase domain.

2020-08-19 | GSE152653 | GEO

Etiology matters - Comparing Genomic DNA Methylation Patterns in Three Rat Models of Acquired Epilepsy (TBI â mRNA-seq)

Project description:Explore DNA methylation in traumatic brain injury model of epilepsy and its relationship to gene expression. Examination of expression changes in stimulated rats compared to sham operated animals in traumatic brain injury model of epilepsy.

2016-09-06 | E-GEOD-75120 | biostudies-arrayexpress

Etiology matters - Comparing Genomic DNA Methylation Patterns in Three Rat Models of Acquired Epilepsy (TBI – mRNA-seq)

Project description:Explore DNA methylation in traumatic brain injury model of epilepsy and its relationship to gene expression.

2016-09-06 | GSE75120 | GEO

Etiology matters - Comparing Genomic DNA Methylation Patterns in Three Rat Models of Acquired Epilepsy (TBI – MBD-seq)

Project description:Explore DNA methylation in traumatic brain injury model of epilepsy and its relationship to gene expression.

2016-09-06 | GSE75119 | GEO