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ELOVL2 is a novel tumor suppressor attenuating tamoxifen resistance in breast cancer via suppressing the AKT pathway [methylation 850K]

ABSTRACT: ELOVL2 is a novel tumor suppressor attenuating tamoxifen resistance in breast cancer via suppressing the AKT pathway [methylation 850K]

PROVIDER: PRJNA548634 | ENA |

REPOSITORIES: ENA

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ELOVL2 is a novel tumor suppressor attenuating tamoxifen resistance in breast cancer via suppressing the AKT pathway [gene expression]

Project description:Analysis of tamoxifen-sensitivity recovery effect by genes which are regulated by ELOVL2(Elongation of very long chain fatty acids protein 2) at gene expression level in breast cancer. This study identifies that ELOVL2 regulates AKT or ER signaling-related genes and ELOVL2 as an essential gene responsible for resistance.

2020-06-12 | GSE132614 | GEO

ELOVL2 is a novel tumor suppressor attenuating tamoxifen resistance in breast cancer via suppressing the AKT pathway

Project description:ELOVL2 is a novel tumor suppressor attenuating tamoxifen resistance in breast cancer via suppressing the AKT pathway

| PRJNA548537 | ENA

ELOVL2 is a novel tumor suppressor attenuating tamoxifen resistance in breast cancer via suppressing the AKT pathway [gene expression]

Project description:ELOVL2 is a novel tumor suppressor attenuating tamoxifen resistance in breast cancer via suppressing the AKT pathway [gene expression]

| PRJNA548639 | ENA

ELOVL2 is a novel tumor suppressor attenuating tamoxifen resistance in breast cancer via suppressing the AKT pathway [methylation 450K]

Project description:ELOVL2 is a novel tumor suppressor attenuating tamoxifen resistance in breast cancer via suppressing the AKT pathway [methylation 450K]

| PRJNA548633 | ENA

ELOVL2 is a novel tumor suppressor attenuating tamoxifen resistance in breast cancer via suppressing the AKT pathway [methylation 850K]

Project description:Genome wide DNA methylation profiling of tamoxifen-resistant(Tam-R) breast cancer cell line MCF-7. The Illumina Infinium MethylationEPIC BeadChip was used to obtain DNA methylation profiles across approximately 850,000 CpGs.

2020-06-12 | GSE132616 | GEO

ELOVL2 is a novel tumor suppressor attenuating tamoxifen resistance in breast cancer via suppressing the AKT pathway [methylation 450K]

Project description:Genome wide DNA methylation profiling of tamoxifen-resistant(Tam-R) breast cancer cell line MCF-7. The Illumina Infinium Human Methylation 450k Bead chip was used to obtain DNA methylation profiles across approximately 450,000 CpGs.

2020-06-12 | GSE132615 | GEO

ELOVL2: a novel tumor suppressor attenuating tamoxifen resistance in breast cancer.

Project description: Not available

| S-EPMC8263635 | biostudies-literature

ELOVL2 is a novel tumor suppressor attenuating tamoxifen resistance in breast cancer via suppressing the AKT pathway

Project description:This SuperSeries is composed of the SubSeries listed below.

2020-06-12 | GSE132617 | GEO

DNA methylation profiling for 850k reannotation and normalization evaluation [850k]

Project description:Illumina Infinium DNA Methylation (5mC) profiling arrays are a popular technology to measure genome-scale distribution of 5mC at low cost and high throughput, especially in cancer and other complex diseases. Following the success of the HumanMethylation450 array (450k), Illumina released the MethylationEPIC array (850k) featuring increased coverage of enhancers in addition to regulatory regions primarily covered by the 450k (i.e. promoters, gene bodies). Despite its widespread use, the analysis of 850k data remains suboptimal as it mostly still relies on Illumina’s default annotation, which underestimates enhancers and long noncoding RNAs (lncRNAs). We thus developed an approach, based on ENCODE and LNCipedia databases, that greatly improves Illumina’s default annotation of enhancers and long noncoding transcripts. Comparisons between the re-annotated 850k and its precursor, the 450k, or RRBS, another high-throughput 5mC profiling technology, revealed that the 850k covers at least three times more enhancers and lncRNAs than the other two technologies. We further investigated the reproducibility of the three technologies and applied various normalisation methods to 850k data, showing that most of them reduce variability to a level below that of RRBS. When analyzed with our new annotation and normalization pipeline, profiling for 5mC changes in breast cancer biopsies with the 850k highlighted aberrant enhancers methylation as the predominant feature, confirming previous reports. In conclusion, our study provides an updated analysis pipeline for 850k data based on a refined probe annotation and normalization that allows for the improved analysis of methylation at enhancers and long noncoding transcripts.

2022-11-11 | GSE198627 | GEO

RNAseq of Salmo salar parrs with CRISPR/Cas9 induced knockout in the elovl2 gene versus wild type

Project description:Atlantic salmon can synthesize polyunsaturated fatty acids (PUFAs), such as eicosapentaenoic acid (20:5n-3), arachidonic acid (20:4n-6) and docosahexaenoic acid (22:6n-3) via activities of very long chain fatty acyl elongases (elovls) and fatty acyl desaturases (fads), albeit to a limited degree. Understanding molecular mechanisms of PUFA biosynthesis and regulation is a pre-requisite for sustainable use of vegetable oils in aquafeeds as current sources of fish oils are unable to meet increasing demands for omega-3 PUFAs. By generating CRISPR-mediated elovl2 knockout, we have shown that elovl2 is crucial for multi-tissue synthesis of 22:6n-3 in vivo and endogenously synthesized PUFAs are important for transcriptional regulation of lipogenic genes in Atlantic salmon. The elovl2 knockouts showed reduced levels of 22:6n-3 and accumulation of 20:5n-3 and docosapentaenoic acid (22:5n-3) in the liver, brain and white muscle, suggesting inhibition of elongation. Additionally, elovl2-knockout salmon showed accumulation of 20:4n-6 in the brain and white muscle. The impaired synthesis of 22:6n-3 induced hepatic expression of sterol regulatory element binding protein-1 (srebp-1), fatty acid synthase-b, Δ6fad-a, Δ5fad and elovl5. Our study demonstrates key roles of elovl2 at two penultimate steps of PUFA synthesis in vivo and suggests Srebp-1 as a main regulator of PUFA synthesis in Atlantic salmon.

2019-04-30 | E-MTAB-7220 | biostudies-arrayexpress

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