Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

The detecting of m6A RNA modifications upon Oxford Nanopore direct-RNA sequencing [Nanopore]

ABSTRACT: To investigate the potential mechanisms by which m6A contributes to ALS disease degeneration, we utilized a direct RNA sequencing platform, allowing for the identification of the m6A modification sites at single-nucleotide resolution. With the croreference of the ALS risk genes and transcriptomic RNA-seq data in ALS, we could further indntify the m6A-dependent potential genes and pathways in ALS.

ORGANISM(S): Mus musculus

PROVIDER: GSE290245 | GEO | 2025/04/30

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

The detecting of m6A RNA modifications upon Oxford Nanopore direct-RNA sequencing [Nanopore]

Project description:The detecting of m6A RNA modifications upon Oxford Nanopore direct-RNA sequencing [Nanopore]

| PRJNA1226638 | ENA

The Motor Neuron m6A Repertoire Governs Neuronal Homeostasis and Augmented m6A Production Mitigates ALS Symptom Manifestation [snMultiome-seq]

Project description:Amyotrophic lateral sclerosis (ALS) is a swiftly progressive and fatal neurodegenerative ailment marked by the degenerative motor neurons (MNs). Why MNs are specifically susceptible in predominantly sporadic cases remains enigmatic. Here, we demonstrated N6-methyladenosine (m6A), an RNA modification catalyzed by the METTL3/METTL14 methyltransferase complex, as a pivotal contributor to ALS pathogenesis. By conditional knockout Mettl14 in murine MNs, we recapitulate almost the full spectrum of ALS disease characteristics. Mechanistically, pervasive m6A hypomethylation triggers dysregulated expression of high-risk genes associated with ALS and an unforeseen reduction of chromatin accessibility in MNs. Additionally, we observed diminished m6A levels in induced pluripotent stem cell (iPSC)-derived MNs from familial and sporadic ALS patients. Restoring m6A equilibrium via a small molecule or gene therapy significantly preserves MNs from degeneration and mitigates motor impairments in ALS iPSC-derived MNs and murine models. Our study presents a substantial stride towards identifying pioneering efficacious ALS therapies via RNA modifications.

2025-04-30 | GSE290242 | GEO

M6A reduction relieves FUS-associated ALS granules [CLIP-seq]

Project description:Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease due to gradual motorneurons (MN) degeneration. Among the processes associated to ALS pathogenesis, there is the formation of cytoplasmic inclusions produced by mutant protein aggregation, among which the RNA binding protein FUS. In this work we show that such inclusions are significantly reduced in number and dissolve faster when the RNA m6A content is diminished as a consequence of the m6A writer METTL3 knock-down. These effects were obtained observed both in neuronal cell lines and in iPSC-derived human motor neurons expressing mutant FUS. Importantly, stress granules formed in mutant conditionswhen mutant FUS is expressed/ALS condition showed a distinctive transcriptome with respect to control cells; interestingly, after METTL3 downregulation, it reverted to similar to control. Finally, we show that FUS inclusions are reduced also in patient-derived fibroblasts treated with STM-2457, a well characterized inhibitor of METTL3 activity, paving the way for its possible use for counteracting aggregate formation in ALS.

2024-05-06 | GSE256070 | GEO

Catalytic activity of nuclear METTL3 promotes functional m6A modifications that drive retinal development [Nanopore-seq]

Project description:METTL3 catalyzes N6-methyladenosine (m6A) on mRNA, regulating RNA metabolism, but its role in early retinal development remains virtually unstudied. Using stem cell-derived 3D retinal organoids to model retinal progenitor cell (RPC) differentiation, we found that loss of METTL3 nuclear m6A enzymatic activity impairs formation of the Rx+ retinal anlage in vitro. Through dCas13b-FTO m6A engineering, we demonstrate that m6A modifications at the Six3 3'UTR control its stability. While Mettl3 loss altered histone modifications, direct METTL3 chromatin targets were not transcriptionally functional. Integration of transcriptome-wide m6A and protein-RNA mapping with a degron-based strategy revealed immediate effects of METTL3 degradation in RPCs, uncovering a regulatory interaction between METTL3 and its RNA target Ythdf1. We demonstrate uncoupling of chromatin accessibility from changes in retinal transcription and m6A modifications. In vivo studies of Mettl3-deficient RPCs showed altered cell cycle and impaired retinal ganglion cell generation. Our findings establish METTL3-dependent m6A modifications as an essential post-transcriptional layer that drives retinal development.

2025-01-25 | GSE287489 | GEO

Systematic comparison of tools used for m6A mapping from nanopore direct RNA sequencing

Project description:State-of-the-art algorithms for m6A detection and quantification via nanopore direct RNA sequencing have been continuously developed, little is known about their capacities and limitations, which makes a comprehensive assessment in urgent need. Therefore, we performed comprehensive benchmarking of 10 computational tools relying on current-based and base-calling “errors” strategies for m6A detection by nanopore sequencing.

2023-03-01 | GSE195618 | GEO

Oxford Nanopore MinION Direct RNA-Seq for Systems Biology.

Project description:Long-read direct RNA sequencing developed by Oxford Nanopore Technologies (ONT) is quickly gaining popularity for transcriptome studies, while fast turnaround time and low cost make it an attractive instrument for clinical applications. There is a growing interest to utilize transcriptome data to unravel activated biological processes responsible for disease progression and response to therapies. This trend is of particular interest for precision medicine which aims at single-patient analysis. Here we evaluated whether gene abundances measured by MinION direct RNA sequencing are suited to produce robust estimates of pathway activation for single sample scoring methods. We performed multiple RNA-seq analyses for a single sample that originated from the HepG2 cell line, namely five ONT replicates, and three replicates using Illumina NovaSeq. Two pathway scoring methods were employed-ssGSEA and singscore. We estimated the ONT performance in terms of detected protein-coding genes and average pairwise correlation between pathway activation scores using an exhaustive computational scheme for all combinations of replicates. In brief, we found that at least two ONT replicates are required to obtain reproducible pathway scores for both algorithms. We hope that our findings may be of interest to researchers planning their ONT direct RNA-seq experiments.

| S-EPMC8615092 | biostudies-literature

Nanopore direct RNA seq-based basecalling of m6A

Project description:Nanopore direct RNA seq-based basecalling of m6A

| PRJEB61874 | ENA

M6A reduction relieves FUS-associated ALS granules [m6A-IP]

Project description:M6A reduction relieves FUS-associated ALS granules [m6A-IP]

| PRJNA1014475 | ENA

Widespread Occurrence of m6A in bacterial mRNA

Project description:N6-methyladenosine (m6A) is one of the most abundant modifications in eukaryotic RNA. Recent mapping of m6A methylomes in mammals, yeast, and plants as well as characterization of m6A methyltransferases, demethylases, and binding proteins have revealed regulatory functions of this dynamic RNA modification. In bacteria, although m6A is present in ribosomal RNA (rRNA), its occurrence in messenger RNA (mRNA) still remains elusive. Here, we used liquid chromatography-mass spectrometry (LC-MS) to calculate the m6A/A ratio in mRNA from a wide range of bacterial species, which demonstrates that m6A is an abundant mRNA modification in tested bacteria. Subsequent transcriptome-wide m6A profiling in Escherichia coli and Pseudomonas aeruginosa revealed a conserved distinct m6A pattern that is significantly different from that in eukaryotes. Most m6A peaks are located inside open reading frames (ORF), and carry a unique consensus motif (GCCAU). Functional enrichment analysis of bacterial m6A peaks indicates that the majority of m6A-modified transcripts are associated with respiration, amino acids metabolism, stress response, and small RNAs genes, suggesting potential regulatory roles of m6A in these pathways. m6A profiling in E.coli and P.aeruginosa mRNA

2015-07-08 | E-GEOD-65347 | biostudies-arrayexpress

Identification and characterisation of potential targets of N6-methyladenosine (m6A) modification in the process of lumbar disc degeneration

Project description:In this study, to explore the potential involvement of m6A modification in intervertebral disc degeneration, we conducted RNA m6A modification profiling in 3 human control nucleus pulposus tissue and 3 degenerative nucleus pulposus tissue by m6A-RIP-sequencing.

2025-03-01 | GSE260813 | GEO

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data