Enhanced myogenesis through LncFAM-mediated recruitment of HNRNPL to the MYBPC2 promoter II
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ABSTRACT:
PROVIDER: PRJNA889770 | ENA |
REPOSITORIES: ENA
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| SRR21877379_1.fastq.gz | Fastqsanger.gz |
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Project description:Enhanced myogenesis through LncFAM-mediated recruitment of HNRNPL to the MYBPC2 promoter
| PRJNA889813 | ENA
Project description:Enhanced myogenesis through LncFAM-mediated recruitment of HNRNPL to the MYBPC2 promoter I
| PRJNA842674 | ENA
Project description:We identified a novel muscle-specific lncRNA, lncFAM71E1-2:2 (lncFAM), which increased robustly during early human myogenesis. Overexpression of lncFAM promoted differentiation of human myoblasts into myotubes, while silencing lncFAM suppressed this process. A nucleus-resident lncRNA, lncFAMwas studied using chromatin isolation by RNA purification followed by mass spectrometry (ChIRP-ms) analysis to identify the molecular mechanisms whereby it might promote myogenesis. Analysis of lncFAM-interacting proteins revealed that lncFAM recruited the RNA-binding protein HNRNPL to the promoter of MYPBPC2, in turn increasing MYBPC2 mRNA transcription and enhancing production of the myogenic protein MYPBPC2. These results highlight a mechanism whereby a novel ribonucleoprotein complex, lncFAM-HNRNPL promotes MYBPC2 expression transcriptionally to increase myogenesis
2022-11-19 | GSE215327 | GEO
Project description:We identified a novel muscle-specific lncRNA, lncFAM71E1-2:2 (lncFAM), which increased robustly during early human myogenesis. Overexpression of lncFAM promoted differentiation of human myoblasts into myotubes, while silencing lncFAM suppressed this process. A nucleus-resident lncRNA, lncFAM was studied using chromatin isolation by RNA purification followed by mass spectrometry (ChIRP-ms) analysis to identify the molecular mechanisms whereby it might promote myogenesis. Analysis of lncFAM-interacting proteins revealed that lncFAM recruited the RNA-binding protein HNRNPL to the promoter of MYPBPC2, in turn increasing MYBPC2 mRNA transcription and enhancing production of the myogenic protein MYPBPC2. These results highlight a mechanism whereby a novel ribonucleoprotein complex, lncFAM-HNRNPL promotes MYBPC2 expression transcriptionally to increase myogenesis.
2022-11-19 | GSE204886 | GEO
Project description:The mammalian transcriptome comprises a vast family of long noncoding (lnc)RNAs implicated in physiologic processes such as myogenesis, through which muscle forms during embryonic development and regenerates in the adult. However, the specific molecular mechanisms by which lncRNAs regulate human myogenesis are poorly understood. Here, we identified a novel muscle-specific lncRNA, lncFAM71E1-2:2 (lncFAM), which increased robustly during early human myogenesis. Overexpression of lncFAM promoted differentiation of human myoblasts into myotubes, while silencing lncFAM suppressed this process. As lncFAM resides in the nucleus, chromatin isolation by RNA purification followed by mass spectrometry (ChIRP-MS) analysis was employed to identify the molecular mechanisms whereby it might promote myogenesis. Analysis of lncFAM-interacting proteins revealed that lncFAM recruited the RNA-binding protein HNRNPL to the promoter of MYBPC2, in turn increasing MYBPC2 mRNA transcription and enhancing production of the myogenic protein MYBPC2. These results highlight a mechanism whereby a novel ribonucleoprotein complex, lncFAM-HNRNPL, elevates MYBPC2 expression transcriptionally to promote myogenesis.
| S-EPMC9825165 | biostudies-literature
Project description:This SuperSeries is composed of the SubSeries listed below.
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Project description:Ovarian cancer has the highest mortality rate among gynecologic tumors worldwide, with unclear underlying mechanisms of pathogenesis. RNA-binding proteins (RBPs) primarily direct post-transcriptional regulation through modulating RNA metabolism. Recent evidence demonstrates that RBPs are also implicated in transcriptional control. However, the role and mechanism of RBP-mediated transcriptional regulation in tumorigenesis remain largely unexplored. Here, we show that the RBP heterogeneous ribonucleoprotein L (hnRNPL) interacts with chromatin and regulates gene transcription by forming phase-separated condensates in ovarian cancer. hnRNPL phase separation activates PIK3CB transcription and glycolysis, thus promoting ovarian cancer progression. Notably, we observe that the PIK3CB promoter is transcribed to produce a non-coding RNA which interacts with hnRNPL and promotes hnRNPL condensation. Furthermore, hnRNPL is significantly amplified in ovarian cancer, and its high expression predicts poor prognosis for ovarian cancer patients. By using cell-derived xenograft and patient-derived organoid models, we show that hnRNPL knockdown suppresses ovarian tumorigenesis. Together, our study reveals that phase separation of the chromatin-associated RBP hnRNPL promotes PIK3CB transcription and glycolysis to facilitate tumorigenesis in ovarian cancer. The formed hnRNPL-PIK3CB-AKT axis depending on phase separation can serve as a potential therapeutic target for ovarian cancer.
2025-02-13 | GSE289074 | GEO
Project description:Ovarian cancer has the highest mortality rate among gynecologic tumors worldwide, with unclear underlying mechanisms of pathogenesis. RNA-binding proteins (RBPs) primarily direct post-transcriptional regulation through modulating RNA metabolism. Recent evidence demonstrates that RBPs are also implicated in transcriptional control. However, the role and mechanism of RBP-mediated transcriptional regulation in tumorigenesis remain largely unexplored. Here, we show that the RBP heterogeneous ribonucleoprotein L (hnRNPL) interacts with chromatin and regulates gene transcription by forming phase-separated condensates in ovarian cancer. hnRNPL phase separation activates PIK3CB transcription and glycolysis, thus promoting ovarian cancer progression. Notably, we observe that the PIK3CB promoter is transcribed to produce a non-coding RNA which interacts with hnRNPL and promotes hnRNPL condensation. Furthermore, hnRNPL is significantly amplified in ovarian cancer, and its high expression predicts poor prognosis for ovarian cancer patients. By using cell-derived xenograft and patient-derived organoid models, we show that hnRNPL knockdown suppresses ovarian tumorigenesis. Together, our study reveals that phase separation of the chromatin-associated RBP hnRNPL promotes PIK3CB transcription and glycolysis to facilitate tumorigenesis in ovarian cancer. The formed hnRNPL-PIK3CB-AKT axis depending on phase separation can serve as a potential therapeutic target for ovarian cancer.
2025-02-14 | GSE289102 | GEO
Project description:In the current project with aim to unequivocally characterize a novel splicing-regulatory network that proves to be a central mediator of endothelial barrier function and vascular integrity. At the core of this network is the endothelial enriched lncRNA NTRAS (annotated as RP11-354k1.1) is shown to control alternative splicing decisions in HUVECs through interplaying with splicing factor hnRNPL. Specifically, in the project we show that NTRAS sequesters the splicing factor hnRNPL through a CA dinucleotide motif, to enhance TJP1 exon 20 usage, thereby TJP1α+ isoform. In turn disrupting TJP1α+ isoform expression impaired endothelial barrier function. Collectively, this splicing-regulatory network might prove fundamental in unlocking new interventions strategic to prevent or reverse vascular leakage.
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Project description:Ovarian cancer has the highest mortality rate among gynecologic tumors worldwide, with unclear underlying mechanisms of pathogenesis. RNA-binding proteins (RBPs) primarily direct post-transcriptional regulation through modulating RNA metabolism. Recent evidence demonstrates that RBPs are also implicated in transcriptional control. However, the role and mechanism of RBP-mediated transcriptional regulation in tumorigenesis remain largely unexplored. Here, we show that the RBP heterogeneous ribonucleoprotein L (hnRNPL) interacts with chromatin and regulates gene transcription by forming phase-separated condensates in ovarian cancer. hnRNPL phase separation activates PIK3CB transcription and glycolysis, thus promoting ovarian cancer progression. Notably, we observe that the PIK3CB promoter is transcribed to produce a non-coding RNA which interacts with hnRNPL and promotes hnRNPL condensation. Furthermore, hnRNPL is significantly amplified in ovarian cancer, and its high expression predicts poor prognosis for ovarian cancer patients. By using cell-derived xenograft and patient-derived organoid models, we show that hnRNPL knockdown suppresses ovarian tumorigenesis. Together, our study reveals that phase separation of the chromatin-associated RBP hnRNPL promotes PIK3CB transcription and glycolysis to facilitate tumorigenesis in ovarian cancer. The formed hnRNPL-PIK3CB-AKT axis depending on phase separation can serve as a potential therapeutic target for ovarian cancer.
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