M6A epitranscriptomic changes in response to hypoxic condition or ALKBH5 knock-down in U87
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE171497 | GEO | 2024/03/31
REPOSITORIES: GEO
Similar Datasets
Project description:Purpose: The present study was carried out to investigate the global m6A modified RNA pattern and possible mechanisms underlying the pathogenesis of keloid. Method: 14 normal skin and 14 keloid tissue were firstly collected on clinic. Then 3 samples from each group were randomly selected to be verified with the Western Blot to determine the level of methyltransferase and demethylase. The total RNA of all samples in each group was isolated and subjected to the analysis of MeRIP-sequencing and RNA-sequencing. With the software of MeTDiff and htseq-count, the m6A peaks and differentially expressed genes (DEGs) were determined within the fold change > 2 and p -value < 0.05. The top 10 pathways of m6A modified genes in each group and the differentially-expressed genes were enriched by the Kyoto Encyclopedia of Genes and Genomes signaling pathways. Finally, the closely associated pathway was determined with the Western Blot and immunofluorescence staining. Results: There was a higher protein level of WTAP and Mettl3 in the keloid than in the normal tissue. 21,020 unique m6A peaks with 6573 unique m6A-associated genetic transcripts appeared in the keloid samples. In the normal tissue, 4028 unique m6A peaks with 779-associated modified genes appeared in the keloid. In the RNA-sequencing, there were 847 genes significantly changed between these groups, transcriptionally. The genes with m6A methylated modification and the upregulated differentially expressed genes between two tissues were both mainly related to the Wnt signaling pathway. Moreover, the hyper-m6A modified Wnt / β-catenin pathway in keloid was verified with western blotting. From immunofluorescence staining results, we found that the accumulated fibroblasts were under a hyper-m6A condition in the keloid and the Wnt/β-catenin signaling pathway was mainly activated in the fibroblasts. Conclusion: The fibroblasts in the keloid were under a cellular hyper-m6A methylated condition, and the hyper-m6A modified highly-expressed Wnt / β-catenin pathway in the dermal fibroblasts might promote the pathogenesis of keloid.
2022-05-17 | GSE202851 | GEO
Project description:Purpose: The present study was carried out to investigate the global m6A modified RNA pattern and possible mechanisms underlying the pathogenesis of keloid. Method: 14 normal skin and 14 keloid tissue were firstly collected on clinic. Then 3 samples from each group were randomly selected to be verified with the Western Blot to determine the level of methyltransferase and demethylase. The total RNA of all samples in each group was isolated and subjected to the analysis of MeRIP-sequencing and RNA-sequencing. With the software of MeTDiff and htseq-count, the m6A peaks and differentially expressed genes (DEGs) were determined within the fold change > 2 and p -value < 0.05. The top 10 pathways of m6A modified genes in each group and the differentially-expressed genes were enriched by the Kyoto Encyclopedia of Genes and Genomes signaling pathways. Finally, the closely associated pathway was determined with the Western Blot and immunofluorescence staining. Results: There was a higher protein level of WTAP and Mettl3 in the keloid than in the normal tissue. 21,020 unique m6A peaks with 6573 unique m6A-associated genetic transcripts appeared in the keloid samples. In the normal tissue, 4028 unique m6A peaks with 779-associated modified genes appeared in the keloid. In the RNA-sequencing, there were 847 genes significantly changed between these groups, transcriptionally. The genes with m6A methylated modification and the upregulated differentially expressed genes between two tissues were both mainly related to the Wnt signaling pathway. Moreover, the hyper-m6A modified Wnt / β-catenin pathway in keloid was verified with western blotting. From immunofluorescence staining results, we found that the accumulated fibroblasts were under a hyper-m6A condition in the keloid and the Wnt/β-catenin signaling pathway was mainly activated in the fibroblasts. Conclusion: The fibroblasts in the keloid were under a cellular hyper-m6A methylated condition, and the hyper-m6A modified highly-expressed Wnt / β-catenin pathway in the dermal fibroblasts might promote the pathogenesis of keloid.
2022-05-17 | GSE202855 | GEO
Project description:We performed m6A-RIPs in Ascl1-induced neurons (iNeurons) to investigate the neuronal m6A epitranscriptome. Immunoprecipitation was done twice using two different antibodies, acquired from Abcam and Synaptic Systems (SySy), allowing for a more robust detection of m6A modification marks. Additionally, RIP-seq was performed separately with intact and fragmented RNA. The former approach allowed to identify proportions of m6A-modified transcripts among the total number, while the latter approach provided the information to identify genomic coordinates of m6A peaks.
2023-07-12 | E-MTAB-9542 | biostudies-arrayexpress
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
Project description:We profile transcriptome-wide m6A in porcine liver of three developmental stages: newborn, suckling and adult. Approximately one-third of the transcribed genes are modified by m6A, with a frequency of 1.47 to 1.56 m6A peaks per mRNA. m6A was distributed predominantly around stop codon. Consensus motif sequence ‘RRm6ACH’ has been observed in most m6A peaks. A negative correlation rate (average Pearson’s r = -0.450) was found between m6A methylation level and gene expression. Gene ontology analysis of transcripts persistently modified in three stages showed m6A modified genes relevant to critical functions, including regulation of growth and development, regulation of metabolic process and protein catabolic process. Genes with higher m6A methylation and lower expression of one certain stage are associated with the biological processes required for or unique to this stage. These results will provide a source for identifying adenosine methylation modified mRNA of porcine liver and extended our knowledge of the role of m6A in development and growth of mammalian organ.
2016-09-25 | GSE87327 | GEO
Project description:To find the m6A methylation targets of ABRO1, we performed m6A methylated RNA immunoprecipitation sequencing (MeRIP-seq) in ABRO1 Knockout or Wild type (WT) mice heart. The analysis of the distribution of m6A peak density in mRNA transcripts showed that m6A peaks are mainly found in coding sequences (CDS) and a considerable amount of m6A peaks enriched around start codon and stop codon regions in mRNA transcripts from ABRO1 KO and WT hearts. Among the total RNA transcripts with m6A sites, more than half (59.4%) of mRNA transcripts contain ≤ 2 m6A peaks, 27.4% mRNA transcripts comprise 3 to 5 m6A peaks and more than 5 m6A peaks exist in 13.2% of mRNA transcripts. MeRIP-seq analysis results from ABRO1 deleted hearts showed that a total of 3444 m6A peaks were upregulated and 4631 m6A were downregulated compared to WT hearts.
2023-12-01 | GSE188518 | GEO
Project description:<p>Despite the nuclear localization of the m6A machinery, the genomes of multiple exclusively-cytoplasmic RNA viruses, such as chikungunya (CHIKV) and dengue (DENV), are reported to be extensively m6A-modified. However, these findings are mostly based on m6A-seq, an antibody-dependent technique with a high rate of false positives. Here, we addressed the presence of m6A in CHIKV and DENV RNAs. For this, we combined m6A-seq and the antibody-independent SELECT and nanopore direct RNA sequencing techniques with functional, molecular, and mutagenesis studies. Following this comprehensive analysis, we found no evidence of m6A modification in CHIKV or DENV transcripts. Furthermore, depletion of key components of the host m6A machinery did not affect CHIKV or DENV infection. Moreover, CHIKV or DENV infection had no effect on the m6A machinery’s localization. Our results challenge the prevailing notion that m6A modification is a general feature of cytoplasmic RNA viruses and underscore the importance of validating RNA modifications with orthogonal approaches.</p>
2024-01-25 | MTBLS6978 | MetaboLights
Project description:Deoxynivalenol (DON) frequently detected in a wide range of foods and feeds, inducing cytotoxicity to animals and humans. N6-methyladenosine (m6A) is an important epitranscriptomic marker with high abundance in eukaryotic mammals mRNAs. However, the role of the m6A methylomes in DON damage is still poorly understood. Here, we investigated the m6A transcriptome-wide profile in intestinal porcine epithelial cells (IPEC-J2) with and without 1000 ng/mL DON treatment via m6A sequencing and RNA sequencing. In total, 5406 new m6A peaks appeared with the disappearance of 2615 peaks in DON-induced IPEC-J2. The unique m6A-modified genes in DON-induced IPEC-J2 were associated with TNF signaling pathway. We identified 733 differentially expressed mRNA transcripts with hyper-methylated or hypo-methylated m6A peaks between DON-induced IPEC-J2 and normal IPEC-J2. Protein interaction network analysis and qPCR validation suggested that CSF2 probably acts as a promising new target for combating DON damage in IPEC-J2. Our first report of m6A transcriptome-wide map of IPEC-J2 cells presented here provides a starting roadmap for uncovering m6A functions that may affect DON infection.
2020-08-13 | GSE156078 | GEO
Project description:In order to identify YBX1-dependent targets that are modulated under hypoxic conditions, we used control and YBX1 knockdown cells grown under normoxia and hypoxia to profile gene expression levels. Control and YBX1-knockdown cells were grown and profiled under hypoxia and normoxia to identify YBX1-dependent hypoxia-induced target transcripts.
2015-05-08 | E-GEOD-63562 | biostudies-arrayexpress
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.
2015-07-08 | GSE65347 | GEO