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Drugging the lncRNA MALAT1 via LNA gapmeR ASO inhibits gene expression of proteasome subunits and triggers anti-multiple myeloma activity

ABSTRACT: Drugging the lncRNA MALAT1 via LNA gapmeR ASO inhibits gene expression of proteasome subunits and triggers anti-multiple myeloma activity

PROVIDER: PRJNA428744 | ENA |

REPOSITORIES: ENA

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Drugging the lncRNA MALAT1 via LNA gapmeR ASO inhibits gene expression of proteasome subunits and triggers anti-multiple myeloma activity

Project description:The biological role and therapeutic potential of long non-coding RNAs (lncRNAs) in multiple myeloma (MM) are still to be investigated. Here, we studied the functional significance and the druggability of the oncogenic lncRNA MALAT1 in MM. Targeting MALAT1 by novel LNA-gapmeR anti-sense oligonucleotide antagonized MM cell proliferation and triggered apoptosis both in vitro and in vivo in a murine xenograft model of human MM. Of note, antagonism of MALAT1 dowmodulated the two major transcriptional activators of proteasome subunit genes, namely NRF1 and NRF2, and resulted in reduced trypsin, chymotrypsin and caspase-like proteasome activities and in accumulation of polyubiquitinated proteins. NRF1 and NRF2 decrease upon MALAT1-targeting was due to transcriptional activation of their negative regulator KEAP1, and resulted in reduced expression of anti-oxidant genes and increased ROS levels. In turn, NRF1 promoted MALAT1 expression thus establishing a positive feedback loop. Our findings demonstrate a crucial role of MALAT1 in the regulation of the proteasome machinery, and provide proof-of-concept that its targeting is a novel powerful option for the treatment of MM.

2018-12-31 | GSE108824 | GEO

Expression analysis of mice hepatic NMuLi cells treated LNA gapmer ASO containing nucleobase modification

Project description:Antisense oligonucleotide (ASO) has the potential to induce hybridization-dependent effects by inadvertent binding of ASOs to RNA with sequences similar to that of the target RNA. In the present study, we examined the effects of the nucleobase derivatives introduced into the gapmer ASOs on gene expression. We performed microarray analysis using NMuLi cells (mouse liver-derived cells) treated with LNA gapmer ASO containing nucleobase modification.

2022-07-12 | GSE197166 | GEO

Expression analysis of Huh-7 cells treated with LNA gapmer targeting glucocorticoid receptor (GR) RNA

Project description:Antisense oligonucleotide (ASO) has the potential to induce off-target effects due by inadvertent binding of ASOs to unintended RNAs that have a sequence similar to the target RNA. In the present study, we focused on the effects of oligonucleotide extension of gapmer ASOs on off-target effects. We performed microarray analysis using Huh-7 cells (human liver-derived cells) treated with a 14-mer LNA gapmer ASO and the extended 18-mer derivatives with the same core 14-mer region.

2021-12-15 | GSE188684 | GEO

Drugging the lncRNA MALAT1 via LNA gapmeR ASO inhibits gene expression of proteasome subunits and triggers anti-multiple myeloma activity.

Project description:The biological role and therapeutic potential of long non-coding RNAs (lncRNAs) in multiple myeloma (MM) are still to be investigated. Here, we studied the functional significance and the druggability of the oncogenic lncRNA MALAT1 in MM. Targeting MALAT1 by novel LNA-gapmeR antisense oligonucleotide antagonized MM cell proliferation and triggered apoptosis both in vitro and in vivo in a murine xenograft model of human MM. Of note, antagonism of MALAT1 downmodulated the two major transcriptional activators of proteasome subunit genes, namely NRF1 and NRF2, and resulted in reduced trypsin, chymotrypsin and caspase-like proteasome activities and in accumulation of polyubiquitinated proteins. NRF1 and NRF2 decrease upon MALAT1 targeting was due to transcriptional activation of their negative regulator KEAP1, and resulted in reduced expression of anti-oxidant genes and increased ROS levels. In turn, NRF1 promoted MALAT1 expression thus establishing a positive feedback loop. Our findings demonstrate a crucial role of MALAT1 in the regulation of the proteasome machinery, and provide proof-of-concept that its targeting is a novel powerful option for the treatment of MM.

| S-EPMC6127082 | biostudies-literature

Expression analysis of mice hepatic NMuLi cells treated LNA gapmer ASO containing nucleobase modification

Project description:Expression analysis of mice hepatic NMuLi cells treated LNA gapmer ASO containing nucleobase modification

| PRJNA809303 | ENA

Evaluation of off-target effects of gapmer antisense oligonucleotides using human cells

Project description:Antisense oligonucleotide (ASO) has the potential to induce off-target effects due to complementary binding between the ASO and unintended RNA with a sequence similar to the target RNA. In this study, we evaluated off-target effects of gapmer ASOs, which cleave the target RNA in an RNase H-dependent manner, by introducing the ASO into human cells and performing microarray analysis. Our data indicate that gapmer ASOs induce off-target effects depending on the degree of complementarity between the ASO and off-target candidate genes. Based on our results, we also propose a scheme for assessment of off-target effects of gapmer ASOs.

2021-12-08 | GSE190473 | GEO

Deep RNA sequencing analysis after Malat1 silencing in mouse HL1 cells

Project description:We have described role of Malat1 in cardiomyocyte proliferation and binucleation. Data shows regulated genes by LNA mediated silencing of Malat1

2023-04-12 | GSE200733 | GEO

Effect of Malat1 ASO on Neuro2 neuroblastoma cells transcriptome

Project description:We investigated the effects of transfecting Malat1 antisense oligonucleotides on the whole Neuro2 neuroblastoma transcriptome. In this work, global transcription analyses were combined with detailed analyses of some synaptic genes. Our results provide insight on Malat1 effect on the regulation of gene expression in a mouse neuroblastoma cell line. Keywords: Comparative transcriptome analysis from Mus Musculus Neuro2 neuroblastoma cells transfected by Malat1 or Scamble oligodeoxynucleotides.

2010-07-26 | GSE19928 | GEO

A Biodistribution Study of OTV vs. ASO by Intravenous or Intrathecal Administration in Cynomolgus Monkeys

Project description:The objective of this study is to evaluate ASO biodistribution and pharmacodynamic response following intravenous delivery of conjugated OTV, which utilizes transferrin-receptor binding to deliver ASO, vs. intrathecal delivery of naked ASO in cynomolgus monkeys, the current gold standard for ASO delivery. Three groups were included for comparison: 1) Negative control cohort = Four biweekly intravenous doses of saline (n=3); 2) IT cohort = Single intrathecal dose of 4mg MALAT1 ASO (n=3); 3)  OTV multi dose cohort = Four biweekly intravenous doses of 30mpk OTV:MALAT1 (n=3). Tissues were collected two weeks after the final dose to allow sufficient time for target knockdown. Brain, spinal cord, and peripheral tissues were dissected and frozen for molecular analysis. Compared to an intrathecal injection of ASO, systemic administration of OTV resulted in significantly more homogenous biodistribution of ASO in the central nervous system as measured by a probe-based hybridization assay as well as staining with an anti-ASO antibody. One potential consequence of heterogeneous ASO distribution is heterogeneous target knockdown throughout the CNS. We observed more consistent target knockdown throughout the cortex, subcortical areas, and spinal cord of monkeys dosed peripherally with OTV. By contrast, monkeys dosed intrathecally with naked ASO showed much more knockdown in the spinal cord compared to the brian, consistent with ASO distribution.

2024-02-12 | GSE208114 | GEO

High-throughput sequencing identified differentially expressed RNAs between MALAT1 knockdown C3H10 adipocyte and control cells

Project description:Although MALAT1 is a lncRNA highly expressed in many tissues and participates in a series of physiological and pathological processes, the potential role of MALAT1 in adipogenesis is not clear. To gain full insights into MALAT1 function in the adipogenic differention of C3H10 cell, we performed RNA-seq to antisense oligonucleotides(ASO) treated C3H10 cells and found numerous differentially expressed RNAs between MALAT1 knockdown C3H10 adipocyte and control cells.

2020-09-07 | GSE156615 | GEO

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