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METTL3 and N6-methyladenosine Promotes Homologous Recombination Mediated Repair of DSBs by Facilitating R-loop Formation [RIP-Seq]

ABSTRACT: The goals of this study are to compare the level of YTHDC1 associated nascent RNA at chromatin between DMSO and zeocin treatment.

ORGANISM(S): Homo sapiens

PROVIDER: GSE148572 | GEO | 2020/04/13

REPOSITORIES: GEO

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METTL3 and N6-methyladenosine Promotes Homologous Recombination Mediated Repair of DSBs by Facilitating R-loop Formation

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

2020-04-14 | GSE148573 | GEO

METTL3 and N6-methyladenosine Promotes Homologous Recombination Mediated Repair of DSBs by Facilitating R-loop Formation [other]

Project description:Examination of R-loop formation at I-PpoI cutting site (28S rDNA and DAB1) and other uncut genome in NC or siMETTL3 transferred HEK293T with or without I-PpoI cutting

2020-04-14 | GSE148571 | GEO

METTL3 and N6-methyladenosine Promotes Homologous Recombination Mediated Repair of DSBs by Facilitating R-loop Formation [RIP-Seq]

Project description:METTL3 and N6-methyladenosine Promotes Homologous Recombination Mediated Repair of DSBs by Facilitating R-loop Formation [RIP-Seq]

| PRJNA625054 | ENA

Mettl3-/Mettl14-mediated mRNA N6-methyladenosine modulates murine spermatogenesis.

Project description:Spermatogenesis is a differentiation process during which diploid spermatogonial stem cells (SSCs) produce haploid spermatozoa. This highly specialized process is precisely controlled at the transcriptional, posttranscriptional, and translational levels. Here we report that N6-methyladenosine (m6A), an epitranscriptomic mark regulating gene expression, plays essential roles during spermatogenesis. We present comprehensive m6A mRNA methylomes of mouse spermatogenic cells from five developmental stages: undifferentiated spermatogonia, type A1 spermatogonia, preleptotene spermatocytes, pachytene/diplotene spermatocytes, and round spermatids. Germ cell-specific inactivation of the m6A RNA methyltransferase Mettl3 or Mettl14 with Vasa-Cre causes loss of m6A and depletion of SSCs. m6A depletion dysregulates translation of transcripts that are required for SSC proliferation/differentiation. Combined deletion of Mettl3 and Mettl14 in advanced germ cells with Stra8-GFPCre disrupts spermiogenesis, whereas mice with single deletion of either Mettl3 or Mettl14 in advanced germ cells show normal spermatogenesis. The spermatids from double-mutant mice exhibit impaired translation of haploid-specific genes that are essential for spermiogenesis. This study highlights crucial roles of mRNA m6A modification in germline development, potentially ensuring coordinated translation at different stages of spermatogenesis.

| S-EPMC5630681 | biostudies-other

METTL3 and N6-methyladenosine Promotes Homologous Recombination Mediated Repair of DSBs by Facilitating R-loop Formation

Project description:METTL3 and N6-methyladenosine Promotes Homologous Recombination Mediated Repair of DSBs by Facilitating R-loop Formation

| PRJNA625048 | ENA

METTL3 and N6-methyladenosine Promotes Homologous Recombination Mediated Repair of DSBs by Facilitating R-loop Formation [other]

Project description:METTL3 and N6-methyladenosine Promotes Homologous Recombination Mediated Repair of DSBs by Facilitating R-loop Formation [other]

| PRJNA625049 | ENA

N6-methyladenosine modification and METTL3 modulate enterovirus 71 replication.

Project description:N6-methyladenosine (m6A) constitutes one of the most abundant internal RNA modifications and is critical for RNA metabolism and function. It has been previously reported that viral RNA contains internal m6A modifications; however, only recently the function of m6A modification in viral RNAs has been elucidated during infections of HIV, hepatitis C virus and Zika virus. In the present study, we found that enterovirus 71 (EV71) RNA undergoes m6A modification during viral infection, which alters the expression and localization of the methyltransferase and demethylase of m6A, and its binding proteins. Moreover, knockdown of m6A methyltransferase resulted in decreased EV71 replication, whereas knockdown of the demethylase had the opposite effect. Further study showed that the m6A binding proteins also participate in the regulation of viral replication. In particular, two m6A modification sites were identified in the viral genome, of which mutations resulted in decreased virus replication, suggesting that m6A modification plays an important role in EV71 replication. Notably, we found that METTL3 interacted with viral RNA-dependent RNA polymerase 3D and induced enhanced sumoylation and ubiquitination of the 3D polymerase that boosted viral replication. Taken together, our findings demonstrated that the host m6A modification complex interacts with viral proteins to modulate EV71 replication.

| S-EPMC6326802 | biostudies-literature

RNA N6-methyladenosine reader YTHDC1 is essential for TGF-beta-mediated metastasis of triple negative breast cancer [RIP-Seq]

Project description:RNA N6-methyladenosine (m6A) modification and its regulators fine tune gene expression and contribute to tumorigenesis. Here, we uncover the oncogenic role and mechanism of YTHDC1, an m6A reader positively correlated to poor prognosis in breast cancer patients. In a mammary fat pad mouse model, YTHDC1 significantly promoted lung metastasis of triple negative breast cancer (TNBC) cells. Using transcriptome-wide sequencing techniques, we found dysregulation of metastasis-related pathways following YTHDC1 depletion and demonstrated that YTHDC1 is critical for nuclear export of SMAD3 mRNA. YTHDC1 depletion desensitizes TNBC cells to TGF-β, resulting in impaired TGF-β-induced gene signature and inhibition on epithelial-mesenchymal transition (EMT) and cell migration/invasion, which could be at least partially restored by SMAD3 overexpression. Furthermore, we show that the ability of YTHDC1 to recognize m6A on SMAD3 RNA is important for its oncogenic role. Collectively, our study unravels YTHDC1 as vital for distant TNBC metastasis by promoting TGF-β-mediated EMT via SMAD3.

2023-03-25 | GSE193154 | GEO

The RNA N6-Methyladenosine Methyltransferase METTL3 Promotes the Progression of Kidney Cancer via N6-Methyladenosine-Dependent Translational Enhancement of ABCD1.

Project description:The role of N6-methyladenosine (m6A)-modifying proteins in cancer progression depends on the cell type and mRNA affected. However, the biological role and underlying mechanism of m6A in kidney cancer is limited. Here, we discovered the variability in m6A methyltransferase METTL3 expression was significantly increased in clear cell renal cell carcinoma (ccRCC) the most common subtype of renal cell carcinoma (RCC), and high METTL3 expression predicts poor prognosis in ccRCC patients using a dataset from The Cancer Genome Atlas (TCGA). Importantly, knockdown of METTL3 in ccRCC cell line impaired both cell migration capacity and tumor spheroid formation in soft fibrin gel, a mechanical method for selecting stem-cell-like tumorigenic cells. Consistently, overexpression of METTL3 but not methyltransferase activity mutant METTL3 can promote cell migration, spheroid formation in cell line and tumor growth in xenograft model. Transcriptional profiling of m6A in ccRCC tissues identified the aberrant m6A transcripts were enriched in cancer-related pathways. Further m6A-sequencing of METTL3 knockdown cells and functional studies confirmed that translation of ABCD1, an ATP-binding cassette (ABC) transporter of fatty acids, was inhibited by METTL3 in m6A-dependent manner. Moreover, knockdown of ABCD1 in ccRCC cells decreased cancer cell migration and spheroid formation, and upregulation of ABCD1 acts as an adverse prognosis factor of kidney cancer patients. In summary, our study identifies that METTL3 promotes ccRCC progression through m6A modification-mediated translation of ABCD1, providing an epitranscriptional insight into the molecular mechanism in kidney cancer.

| S-EPMC8496489 | biostudies-literature

N6-methyladenosine methyltransferase METTL3 promotes colorectal cancer cell proliferation through enhancing MYC expression.

Project description:N6-methyladenosine (m6A) modification is the most common chemical modification in eukaryotic mRNA, which plays a crucial role in regulating mRNA stability, splicing, and translation. METTL3 (methyltransferase like 3), a major RNA N6-adenosine methyltransferase, has been reported to participate in the progression of many cancers. However, its function in colorectal cancer (CRC) remains largely unknown. In this study, we revealed that METTL3 played an oncogenic role in CRC. We found that METTL3 was significantly upregulated in CRC, using quantitative real-time PCR, western blotting, and immunohistochemical staining, and upregulation of METTL3 was associated with clinicopathological features. Functionally, knockdown of METTL3 suppressed CRC cell proliferation in vitro and in vivo. In contrast, overexpression of METTL3 promoted the growth of CRC cells both in vitro and in vivo. Mechanistically, METTL3 exerted its function through enhancing MYC expression, at least partially in an m6A-IGF2BP1-dependent manner. In conclusion, we found that METTL3 was frequently upregulated in human CRC and promoted CRC progression though enhancing MYC expression. This provided new insights into the molecular mechanisms underlying the development of colorectal cancer.

| S-EPMC7270026 | biostudies-literature

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