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Transcriptome analyses in aortic dissection and normal human aorta

ABSTRACT: To identify the m6A methylome in the aorta of patients with acute aortic dissection. MeRIP-seq and RNA-seq experiments of aortic media tissue samples obtained from AD patients and controls were conducted. Compared with control group, the upmethylated coding genes of AD were primarily enriched in the processes associated with extracellular fibril organization, while the genes with downmethylation were enriched in the processes associated with cell death regulation. Furthermore, many differentially methylated m6A sites (DMMSs) coding proteins were mainly annotated during the extracellular matrix and inflammatory responses.

ORGANISM(S): Homo sapiens

PROVIDER: GSE147026 | GEO | 2020/03/17

REPOSITORIES: GEO

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N6-methyladenosine RNA methylome analyses in aortic dissection and normal human aorta

Project description:To identify the m6A methylome in the aorta of patients with acute aortic dissection. MeRIP-seq and RNA-seq experiments of aortic media tissue samples obtained from AD patients and controls were conducted. Compared with control group, the upmethylated coding genes of AD were primarily enriched in the processes associated with extracellular fibril organization, while the genes with downmethylation were enriched in the processes associated with cell death regulation. Furthermore, many differentially methylated m6A sites (DMMSs) coding proteins were mainly annotated during the extracellular matrix and inflammatory responses.

2020-03-17 | GSE147027 | GEO

Differential Methylation of CircRNA m6A in the APP/PS1 Alzheimer's Disease Mouse Model [cirRNA-seq]

Project description:Alzheimer's disease (AD) is a chronic neurological disease which characterized as memory loss and progressive cognitive impairment. The characteristic of AD pathologies include extracellular senile plaques formed by β-amyloid protein deposition, neurofifibrillary tangles formed byhyper-phosphorylation of tau protein, and neuronal loss caused by glial cell proliferation. However, the pathogenesis of AD is still unclear. Resent research have shown that the dysregulation of RNA methylation is related to many biological processes, including neurodevelopment and neurodegenerative diseases. N6-methyladenosine (m6A) is the mainly modification in eukaryotic RNA, and it may be associated with the pathophysiology of AD. Circular RNA (circRNA) is a new type of evolutionarily conserved non-coding RNA without 5’cap and 3’polyadenylic acid tail. Recent studies suggested that circRNA may involved in the pathogenesis of AD. m6A RNA methylation is also found in circRNAs. In this study, we performed high-throughput sequencing on the degree of circRNA m6A methylation in APP/PS1 AD and C57BL/6 mice. The results suggest that circRNA m6A methylation degree in AD mice is different compared to the control group. In addition, using gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis to predict related pathways, the results showed that the genes with different circRNA m6A methylation in AD mice is associated with axon guidance, long-term potentiation, glutama tergic synapse, cholinergic synapse, gabaergic synapse and long-term depression. The MeRIP-qPCR results showed that among the 8 selected circRNA m6A genes, there are 5 genes with increased methylation and others with decreased methylation. In summary, the results of this study indicate that circRNA m6A methylation may related to the pathogenesis of AD.

2022-11-03 | GSE216901 | GEO

Adenosine methylation is widespread throughout the transcriptome and prominent within 3' UTRs

Project description:Here, we use a novel technique for locating regions of N6-adenosine methylation (m6A) throughout the transcriptome and present a profile of m6A sites in the mouse brain. Our use of methylated RNA immunoprecipitation combined with RNA-seq (MeRIP-Seq) identifies thousands of RNAs which contain m6A sites. In addition, we find that regions of m6A formation are particularly enriched near stop codons, which might provide clues into the potential funciton of this highly prevalent RNA modificaiton. Examination of m6A sites in murine brain RNA.

2012-05-16 | E-GEOD-29714 | biostudies-arrayexpress

m6A-meRIP sequencing

Project description:Background: Abdominal aortic aneurysm (AAA) is a vascular disease with indeterminate prevalence but high mortality rates when complicated with rupture. The pathogenesis of AAA has not been fully elucidated. N6-methyladenosine (m6A) modification is likely important in the development of AAA. In the present study, m6A-MeRIP sequencing and RNA sequencing were performed to identify the m6A sites. Bioinformatics analysis was used to evaluate the m6A patterns of the aorta walls of AngII-induced abdominal aortic aneurysm (AAA) model and normal mice. Results: There were 2039 differentially methylated m6A peaks involving 1865 mRNAs in the AAA group relative to the control, of which 1610 peaks in 1466 mRNAs were hypermethylated and 429 peaks in 410 mRNAs were hypomethylated. The hypermethylated mRNAs in AAA group were mostly enriched in transcription regulation and intercellular signaling, especially the Wnt signaling-associated processes. Hypomethylated m6A sites were mainly enriched in G protein-coupled receptor activity and ion channel activity. Conclusion: Our study suggested an original viewpoint that AAA might mainly be relevant to combined effect of m6A methylation modification in Wnt pathway, G protein-coupled receptor and ion channel- associated genes, which were worthy of further investigation.

2021-04-09 | GSE171371 | GEO

Comprehensive Analysis of mRNA Methylation Reveals Enrichment in 3' UTRs and Near Stop Codons (OLD)

2012-12-31 | E-GEOD-34734 | biostudies-arrayexpress

m6A methylome in JQ1 treatment and control in MDA-MB-231 cells.

Project description:We report the application of MeRIP sequencing technology for high-throughput profiling of m6A methylome in breast cancer cells. Comparison of m6A methylome between control and BETi-treated cells revealed the following findings: 1) Significant global alteration of methylation sites due to BETi-treatment (herein defined as BETi-m6A signature). 2) Gene Ontology (GO) analysis of the differential meRIP-seq candidates enriched pathways involved in chromatin modification, RNA splicing and pathways regulating cell fate , reflecting a critical role of m6A in diverse biological processes.

2023-12-31 | GSE219190 | GEO

Genome-wide maps of m6a state in RA FLSs with or without ALKBH5 knockdown.

Project description:To investigate how ALKBH5 modulates RA FLSs functions, we conducted m6A sequencing (MeRIP-seq) of RA FLSs. Consistent with previous studies, in both scramble controls and ALKBH5 knockdown cells, m6A modifications were highly enriched within the GGAC motif. m6A peaks are located mainly in the protein-coding region (CDS) and 3’ untranslated region (3’ UTR) of mRNA transcripts

2023-12-31 | GSE203269 | GEO

RNA-seq and m6A-seq were used to analysis RNA m6A methylation between hypertrophic and normal mouse hearts

Project description:In this experiment, we constructed a mouse myocardial hypertrophy model through transverse aortic constriction (TAC) to further explore the relationship between m6A modification and myocardial hypertrophy, MeRIP-seq and RNA-seq were performed to identify genes with differences m6A modification or expression in transcriptome profile.

2022-05-01 | GSE201764 | GEO

Analysis of m6A methylome in ABRO1 Knockout heart

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

Widespread N6-methyladenosine-dependent RNA Structural Switches Regulate RNA-Protein Interactions

Project description:We show that N6-methyladenosine (m6A), the most abundant internal modification in mRNA/lncRNA with still poorly characterized function, alters RNA structure to facilitate the access of RBM for heterogeneous nuclear ribonucleoprotein C (hnRNP C). We term this mechanism m6A-switch. Through combining PAR-CLIP with Me-RIP, we identify 39,060 m6A-switches among hnRNP C binding sites transcriptome-wide. We show that m6A-methyltransferases METTL3 or METTL14 knockdown decreases hnRNP C binding at 16,582 m6A-switches. Taken together, 2,798 m6A-switches of high confidence are identified to mediate RNA-hnRNP C interactions and affect diverse biological processes including cell cycle regulation. These findings reveal the biological importance of m6A and provide insights into the sophisticated regulation of RNA-RBP interactions through m6A-induced RNA structural remodeling. Measure the m6A methylated hnRNP C binding sites transcriptome-wide by PARCLIP-MeRIP; measure the differential hnRNP C occupancies upon METTL3/METTL14 knockdown by PAR-CLIP; measure RNA abundance and splicing level changes upon HNRNPC, METTL3 and METTL14 knockdown

2015-02-27 | E-GEOD-56010 | biostudies-arrayexpress

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