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In vivo NCL-targeting affects breast cancer aggressiveness through miRNA regulation [Affymetrix]

ABSTRACT: Numerous studies have described the altered expression and the causal role of miRNAs in human cancer. However, to date efforts to modulate miRNA levels for therapeutic purposes have been challenging to implement. Here, we find that Nucleolin (NCL), a major nucleolar protein, post-transcriptionally regulates the expression of a specific subset of miRNAs, including miR-21, miR-221, miR-222, and miR-103, causally involved in breast cancer initiation, progression and drug-resistance. We also show that NCL is commonly overexpressed in human breast tumors, and its expression correlates with that of NCL-dependent miRNAs. Finally, this study indicates that NCL-binding guanosine-rich aptamers affect the levels of NCL-dependent miRNAs and their target genes, reducing breast cancer cell aggressiveness, both in vitro and in vivo. These findings illuminate a path to novel therapeutic approaches based on NCL-targeting aptamers for the modulation of miRNA expression in the treatment of breast cancer.

ORGANISM(S): Homo sapiens

PROVIDER: GSE41972 | GEO | 2012/11/02

SECONDARY ACCESSION(S): PRJNA178628

REPOSITORIES: GEO

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In vivo NCL-targeting affects breast cancer aggressiveness through miRNA regulation [NanoString]

Project description:Numerous studies have described the altered expression and the causal role of miRNAs in human cancer. However, to date efforts to modulate miRNA levels for therapeutic purposes have been challenging to implement. Here, we find that Nucleolin (NCL), a major nucleolar protein, post-transcriptionally regulates the expression of a specific subset of miRNAs, including miR-21, miR-221, miR-222, and miR-103, causally involved in breast cancer initiation, progression and drug-resistance. We also show that NCL is commonly overexpressed in human breast tumors, and its expression correlates with that of NCL-dependent miRNAs. Finally, this study indicates that NCL-binding guanosine-rich aptamers affect the levels of NCL-dependent miRNAs and their target genes, reducing breast cancer cell aggressiveness, both in vitro and in vivo. These findings illuminate a path to novel therapeutic approaches based on NCL-targeting aptamers for the modulation of miRNA expression in the treatment of breast cancer. HeLa cells were transfected with the control or anti-nucleolin siRNA. After 72hours total RNA was collected and analyzed by NanoString.

2012-11-02 | E-GEOD-41971 | biostudies-arrayexpress

In vivo NCL-targeting affects breast cancer aggressiveness through miRNA regulation [RNA-seq]

Project description:Numerous studies have described the altered expression and the causal role of miRNAs in human cancer. However, to date efforts to modulate miRNA levels for therapeutic purposes have been challenging to implement. Here, we find that Nucleolin (NCL), a major nucleolar protein, post-transcriptionally regulates the expression of a specific subset of miRNAs, including miR-21, miR-221, miR-222, and miR-103, causally involved in breast cancer initiation, progression and drug-resistance. We also show that NCL is commonly overexpressed in human breast tumors, and its expression correlates with that of NCL-dependent miRNAs. Finally, this study indicates that NCL-binding guanosine-rich aptamers affect the levels of NCL-dependent miRNAs and their target genes, reducing breast cancer cell aggressiveness, both in vitro and in vivo. These findings illuminate a path to novel therapeutic approaches based on NCL-targeting aptamers for the modulation of miRNA expression in the treatment of breast cancer. Identification of NCL regulated miRNAs by using miRNA high-throughput sequencing of HeLa cells stably expressing double-strand (ds) interfering RNA against NCL or scrambled sequences (sh-NCL or sh-Scr).

2013-02-07 | E-GEOD-44052 | biostudies-arrayexpress

In vivo NCL-targeting affects breast cancer aggressiveness through miRNA regulation [Affymetrix]

Project description:Numerous studies have described the altered expression and the causal role of miRNAs in human cancer. However, to date efforts to modulate miRNA levels for therapeutic purposes have been challenging to implement. Here, we find that Nucleolin (NCL), a major nucleolar protein, post-transcriptionally regulates the expression of a specific subset of miRNAs, including miR-21, miR-221, miR-222, and miR-103, causally involved in breast cancer initiation, progression and drug-resistance. We also show that NCL is commonly overexpressed in human breast tumors, and its expression correlates with that of NCL-dependent miRNAs. Finally, this study indicates that NCL-binding guanosine-rich aptamers affect the levels of NCL-dependent miRNAs and their target genes, reducing breast cancer cell aggressiveness, both in vitro and in vivo. These findings illuminate a path to novel therapeutic approaches based on NCL-targeting aptamers for the modulation of miRNA expression in the treatment of breast cancer. MCF7 cells were treated with the control drug or AS1411 aptamer. After 72hours total RNA was collected and analyzed by Affymetrix U133 plus.

2012-11-02 | E-GEOD-41972 | biostudies-arrayexpress

In vivo NCL-targeting affects breast cancer aggressiveness through miRNA regulation [NanoString]

2012-11-02 | GSE41971 | GEO

In vivo NCL-targeting affects breast cancer aggressiveness through miRNA regulation [RNA-seq]

2013-02-07 | GSE44052 | GEO

In vivo NCL-targeting affects breast cancer aggressiveness through miRNA regulation

Project description:This SuperSeries is composed of the following subset Series: GSE41971: In vivo NCL-targeting affects breast cancer aggressiveness through miRNA regulation [NanoString] GSE41972: In vivo NCL-targeting affects breast cancer aggressiveness through miRNA regulation [Affymetrix] Refer to individual Series

2012-11-02 | E-GEOD-41973 | biostudies-arrayexpress

Nucleolin HITS-CLIP, RNA-Seq and Ribo-Seq upon inhibition of 5'-tRFCys

Project description:Expression of 5'-tRFCys is significantly upregulated during breast cancer metastasis and suppression of 5'-tRFCys significantly reduced metastatic lung colonization of breast cancer. We identified Nucleolin (Ncl) as the direct binding partner of 5'-tRFCys. To identify the molecular mechanism underlying 5'-tRFCys promotion of breast cancer, we performed Ncl HITS-CLIP, RNA-Seq, Ribosome profiling (Ribo-Seq) upon inhibition of 5'-tRFCys. These analyses reveal that 5'-tRFCys enhances Ncl binding to a subset of transcripts, resulting in increased transcript stability of those transcripts and expression.

2022-06-03 | GSE173373 | GEO

Profiling of microRNAs associated with Nucleolin (NCL) in human pulmonary artery smooth muscle cells

Project description:Analysis of miRNAs associated with NCL via RNA immunoprecipitation in pulmonary artery smooth muscle cells using NCL antibodies to identify a distinct set of miRNAs regulated by NCL. Results provide insight into the regulatory mechanism of RNA binding proteins in vascular smooth muscle cells.

2023-03-20 | GSE184972 | GEO

miR-1307-5p counteracts breast cancer angiogenesis and metastasis

Project description:MiRNAs have been shown to alter both protein expression and secretion in different cellular contexts. By combining in vitro, in vivo and in silico techniques, we demonstrated that overexpression of pre-miR-1307 reduced the ability of breast cancer cells to induce endothelial cell sprouting and angiogenesis. However, the molecular mechanism behind this and the effect of the individual mature miRNAs derived from pre-miR-1307 on protein secretion and is largely unknown. Here, we overexpressed miR-1307-3p|0, -3p|1 and 5p|0 in MDA-MB-231 breast cancer cells and assessed the impact of miRNA overexpression on protein secretion by Mass Spectrometry. Unsupervised hierarchical clustering revealed a distinct phenotype induced by overexpression of miR-1307-5p|0 compared to the controls and to the 5’isomiRs derived from the 3p-arm. Together, our results suggest different impacts of miR-1307-3p and miR-1307-5p on protein secretion which is in line with our in vitro observation that miR-1307-5p, but not the isomiRs derived from the 3p-arm reduce endothelial cell sprouting in vitro. Hence these data support the hypothesis that miR-1307-5p is at least partly responsible for impaired vasculature in tumors overexpressing pre-miR-1307.

2024-12-11 | PXD041087 | Pride

Nucleolin-aptamer therapy in retinoblastoma: molecular changes and mass spectrometry–based imaging

Project description:Retinoblastoma (RB) is an intraocular childhood tumor which, if left untreated, leads to blindness and mortality. Nucleolin (NCL) protein which is differentially expressed on the tumor cell surface, binds ligands and regulates carcinogenesis and angiogenesis. We found that NCL is over expressed in RB tumor tissues and cell lines compared to normal retina. We studied the effect of nucleolin-aptamer (NCL-APT) to reduce proliferation in RB tumor cells. Aptamer treatment on the RB cell lines (Y79 and WERI-Rb1) led to significant inhibition of cell proliferation. Locked nucleic acid (LNA) modified NCL-APT administered subcutaneously (s.c.) near tumor or intraperitoneally (i.p.) in Y79 xenografted nude mice resulted in 26 and 65% of tumor growth inhibition, respectively. Downregulation of inhibitor of apoptosis proteins, tumor miRNA-18a, altered serum cytokines, and serum miRNA-18a levels were observed upon NCL-APT treatment. Desorption electrospray ionization mass spectrometry (DESI MS)-based imaging of cell lines and tumor tissues revealed changes in phosphatidylcholines levels upon treatment. Thus, our study provides proof of concept illustrating NCL-APT-based targeted therapeutic strategy and use of DESI MS-based lipid imaging in monitoring therapeutic responses in RB.

2016-11-15 | GSE89818 | GEO

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