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Far upstream element-binding protein 1 regulates LSD1 alternative splicing to promote terminal differentiation of neural progenitors

ABSTRACT: Far upstream element-binding protein 1 regulates LSD1 alternative splicing to promote terminal differentiation of neural progenitors

PROVIDER: PRJNA427580 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR6420500.fastq.gz	Fastqsanger.gz
	SRR6420501.fastq.gz	Fastqsanger.gz
	SRR6420502.fastq.gz	Fastqsanger.gz
	SRR6420503.fastq.gz	Fastqsanger.gz
	SRR6420496.fastq.gz	Fastqsanger.gz

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Far Upstream Element-Binding Protein 1 Regulates LSD1 Alternative Splicing to Promote Terminal Differentiation of Neural Progenitors.

Project description:Loss of a cell's ability to terminally differentiate because of mutations is a selected genetic event in tumorigenesis. Genomic analyses of low-grade glioma have reported recurrent mutations of far upstream element-binding protein 1 (FUBP1). Here, we show that FUBP1 expression is dynamically regulated during neurogenesis and that its downregulation in neural progenitors impairs terminal differentiation and promotes tumorigenesis collaboratively with expression of IDH1R132H. Mechanistically, collaborative action between SRRM4 and FUBP1 is necessary for mini-exon splicing of the neurospecific LSD1+8a isoform. LSD1+8a was downregulated upon loss of FUBP1 in neural progenitors, thereby impairing terminal neuronal differentiation and maturation. Reinforcing LSD1+8a expression in FUBP1-downregulated neural progenitors restored terminal differentiation and suppressed tumorigenesis; hence, LSD1+8a is an obligatory effector of FUBP1-dependent neuronal differentiation. These findings establish a direct role for FUBP1 in neuronal differentiation and also explain its tumor-suppressor function in the nervous system.

| S-EPMC5998560 | biostudies-literature

Far upstream element-binding protein 1 confers lobaplatin resistance via facilitating the arachidonic acid signaling in osteosarcoma

Project description:Far upstream element-binding protein 1 confers lobaplatin resistance via facilitating the arachidonic acid signaling in osteosarcoma

| PRJNA867349 | ENA

Far upstream element-binding protein 1 regulates LSD1 alternative splicing to promote terminal differentiation of neural progenitors

Project description:Analysis of mouse neural progenitors with non targeting or FUBP1 targeting shRNA in proliferation and differentiation conditions

2018-04-09 | GSE108537 | GEO

Far upstream element-binding protein 1 confers lobaplatin resistance via facilitating the arachidonic acid signaling in osteosarcoma

Project description:Purpose: To understand the mechanism of lobaplatin resistance and explore effective strategies for patients with osteosarcoma. Results: The expression of FUBP1 was remarkably elevated in osteosarcoma cell lines and clinical specimens compared with osteoblast cells and the normal bone. High expression of FUBP1 correlated with more aggressive phenotype and poor prognosis in osteosarcoma patients. Overexpression of FUBP1 confers lobaplatin resistance while inhibition of FUBP1 sensitizes osteosarcoma to lobaplatin cytotoxicity both in vivo and in vitro. Additionally, FUBP1 could regulate the transcription of PTGES, and subsequently activated the arachidonic acid signaling pathway in osteosarcoma cells treated with lobaplatin. Conclusions: Our investigation provided evidence that FUBP1 represents a potential therapeutic target for patients suffering from osteosarcoma. Targeting FUBP1 and its downstream AA signaling pathway may be a promising strategy to sensitize lobaplatin treatment during osteosarcoma chemoresistance. Methods: The expression of Far upstream element-binding protein 1(FUBP1) in human osteosarcoma cell lines and patient specimens were determined using Western blotting and Real-time PCR, respectively. 61 human osteosarcoma tissue specimens were analyzed using IHC to investigate the association between the expression of FUBP1 and the clinicopathological data of osteosarcoma patients. CCK8, FACS, clone formation assay, and in vivo animal xenograft model were used to determine the role of FUBP1 in lobaplatin-treating osteosarcoma. ChIP-seq and RNA-seq were performed, and the intersection genes and the enriched signaling pathways were analyzed. Luciferase assay and truncation assay were used to investigate the mechanism of FUBP1 promoting chemoresistance in osteosarcoma.

2023-05-17 | GSE210740 | GEO

Identification of human DNA helicase V with the far upstream element-binding protein.

Project description:The properties of human DNA helicase V (HDH V) were studied in greater detail following an improved purification procedure. From 450 g of cultured cells, <0.1 mg of pure protein was isolated. HDH V unwinds DNA unidirectionally by moving in the 3' to 5' direction along the bound strand in an ATP- and Mg(2+)-dependent fashion. The enzyme is not processive and can also unwind partial RNA-RNA duplexes such as HDH IV and HDH VIII. The M:(r) determined by SDS-PAGE (66 kDa) corresponds to that measured under native conditions, suggesting that HDH V exists as a monomer in the nucleus. Microsequencing of the purified HDH V shows that this enzyme is identical to the far upstream element-binding protein (FBP), a protein that stimulates the activity of the c-myc gene by binding specifically to the 'FUSE' DNA region localized upstream of its promoter. The sequence of HDH V/FBP contains RGG motifs like HDH IV/nucleolin, HDH VIII/G3BP as well as other human RNA and DNA helicases identified by other laboratories.

| S-EPMC29729 | biostudies-literature

Genome-wide maps of Lsd1 binding sites in escort cells/early follicle cells and cap cells/terminal filament cells

Project description:Loss of Lsd1 in Drosophila in specific cells of the Drosophila ovary results in increased BMP signaling outside the cap cell niche and an expanded germline stem cell (GSC) phenotype. To better characterize the function of Lsd1 in different cell populations within the ovary, we performed Chromatin immunoprecipitation coupled with massive parallel sequencing (ChIP-seq). This analysis shows that Lsd1 associates with a surprisingly limited number of sites in escort cells and fewer, and often, different sites in cap cells. These findings indicate that Lsd1 displays highly selective binding in specific cellular contexts. Examination of epitope tagged Lsd1 transgenes in specific cell populations within the Drosophila ovary

2014-02-15 | E-GEOD-54376 | biostudies-arrayexpress

LSD1 complexes - Lsd1 Ablation Triggers Metabolic Reprogramming of Brown Adipose Tissue

Project description:Lsd1 ablation triggers metabolic reprogramming of brown adipose tissue. Lsd1 protein complexes were purified from mouse adipose tissue and analyzed by label-free LC-MS/MS. Mice were kept under different conditions prior complex isolation.

2017-01-03 | PXD004745 | Pride

An endogenous retroviral element co-opts an upstream regulatory sequence to achieve somatic expression and mobility

Project description:An endogenous retroviral element co-opts an upstream regulatory sequence to achieve somatic expression and mobility

| PRJNA1202554 | ENA

Far upstream element-binding protein 1 is a prognostic biomarker and promotes nasopharyngeal carcinoma progression.

Project description:Nasopharyngeal carcinoma (NPC) is a malignant epithelial tumor with tremendous invasion and metastasis capacities, and it has a high incidence in southeast Asia and southern China. Previous studies identified that far upstream element-binding protein 1 (FBP1), a transcriptional regulator of c-Myc that is one of the most frequently aberrantly expressed oncogenes in various human cancers, including NPC, is an important biomarker for many cancers. Our study aimed to investigate the expression and function of FBP1 in human NPC. Quantitative real-time RT-PCR (qRT-PCR), western blot and immunohistochemical staining (IHC) were performed in NPC cells and biopsies. Furthermore, the effect of FBP1 knockdown on cell proliferation, colony formation, side population tests and tumorigenesis in nude mice were measured by MTT, clonogenicity analysis, flow cytometry and a xenograft model, respectively. The results showed that the mRNA and protein levels of FBP1, which are positively correlated with c-Myc expression, were substantially higher in NPC than that in nasopharyngeal epithelial cells. IHC revealed that the patients with high FBP1 expression had a significantly poorer prognosis compared with the patients with low expression (P=0.020). In univariate analysis, high FBP1 and c-Myc expression predicted poorer overall survival (OS) and poorer progression-free survival. Multivariate analysis indicated that high FBP1 and c-Myc expression were independent prognostic markers. Knockdown of FBP1 reduced cell proliferation, clonogenicity and the ratio of side populations, as well as tumorigenesis in nude mice. These data indicate that FBP1 expression, which is closely correlated with c-Myc expression, is an independent prognostic factor and promotes NPC progression. Our results suggest that FBP1 can not only serve as a useful prognostic biomarker for NPC but also as a potential therapeutic target for NPC patients.

| S-EPMC4632288 | biostudies-literature

LSD1 interactome in Glioblastoma

Project description:Tumor-initiating cells (TICs) play a critical role in glioblastoma (GBM) maintenance being responsible for its heterogeneity and resistance to standard therapy. A step toward clinical translation includes GBM TIC targeting. Among the molecules tested for GBM treatment, are those targeting epigenetic modifiers. By using patient-derived TICs and xenograft orthotopic models, we identified Lysine-specific histone demethylase 1A (LSD1) as a potentially druggable target in GBM. LSD1-directed therapy by means of the selective, orally bioavailable and brain penetrant inhibitor DDP_38003 effectively impairs growth, stem-like features and tumorigenic potential of GBM TICs. Our findings point to LSD1 as a positive regulator of Activating Transcription Factor 4 (ATF4)-dependent response in all stress conditions arising during tumor growth and therapy. Thus, through the downregulation of either ATF4 and its adaptive genes, LSD1 targeting is likely a promising strategy to hit GBM TICs by counteracting the ATF4-mediated adaptation to stress.

2022-06-02 | PXD021429 | Pride

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