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MRNA expression profile in LGP2 and LGP2-4KR transgenic (Tg) HEK293 cells stimulated with short poly I:C

ABSTRACT: mRNA expression profile in LGP2 and LGP2-4KR transgenic (Tg) HEK293 cells stimulated with short poly I:C

PROVIDER: PRJNA736018 | ENA |

REPOSITORIES: ENA

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mRNA expression profile in LGP2 and LGP2-4KR transgenic (Tg) HEK293 cells stimulated with short poly I:C

Project description:mRNA expression profiles were compared between wild-type LGP2 and four amino acid replacement LGP2 (LGP2-4KR) cells in the presence or absence of a RIG-I ligand, short poly I:C.

2022-06-07 | GSE176363 | GEO

Gene expression profile analysis of WT and LGP2-/- bone-marrow derived dendritic cells treated with a RIG-I agonist

Project description:We performed RNAseq analysis on WT and LGP2-/- BM-DCs treated with a RIG-I agonist (HCV Poly-U/C RNA) to understand how LGP2 impacts global transcriptional changes following activation of the RIG-I pathway. Analysis of the transcriptional profiles revealed that LGP2 functions as a negative regulator of RIG-I signaling as early as 1 hours post-RIG-I agonist treatment. This finding led us to study how LGP2 negatively influences RIG-I activation through post-translational modification.

2019-06-14 | GSE132696 | GEO

Expression data from liver of Retnla transgenic (Tg) and non-transgenic (non-Tg) mice.

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LGP2 virus sensor regulates gene expression network mediated by TRBP-bound microRNAs.

Project description:To reveal the fuction of cytoplasmic virus sensor protein, LGP2, on RNA silencing, we analyzed gene expression profiles on HeLa WT and LGP2 knockout cells, which were generated with CRISPR/Cas system.

2018-06-29 | GSE113028 | GEO

LGP2 binds PACT to regulate RIG-I- and MDA5-mediated antiviral response

Project description:The RIG-I-like receptors (RLRs: RIG-I, MDA5 and LGP2) trigger inflammatory and antiviral responses by sensing non-self RNA molecules produced during viral replication. LGP2 regulation of RIG-I and MDA5-dependant type-I interferon signaling is a matter of controversy. Here we show that LGP2 interacts with different components of the RNA silencing machinery. Particularly, we identified a direct protein-protein interaction between LGP2 and interferon-inducible double-stranded RNA-dependent protein kinase activator A (PACT). The LGP2-PACT interaction is mediated by the regulatory C-terminal domain of LGP2 and is necessary for inhibiting the RIG-I- and amplifying the MDA5-responses. We describe a point mutation within LGP2 that disrupts LGP2-PACT interaction and leads to the loss of LGP2 regulatory activity over RIG-I and MDA5. These results provide a model in which PACT-LGP2 interaction regulates RIG-I and MDA5 inflammatory response and allows cellular RNA silencing machinery to coordinate the innate immune response.

2019-10-02 | PXD013191 | Pride

Expression data from liver of Retnla transgenic (Tg) and non-transgenic (non-Tg) mice.

Project description:We found that Retnla-Tg mice had significantly lower serum cholesterol levels than non-Tg mice on a high-fat diet (HFD). To explore the molecular mechanisms underlying the cholesterol-lowering effects of Retnla under hyperlipidemic conditions, we subjected age- and sex-matched Retnla-Tg and non-Tg mice to a HFD for 4 weeks. Using a microarray approach, we analyzed the hepatic gene expression profiles related to cholesterol metabolism, including catabolism, biosynthesis, and transport. Total RNA was extracted from livers of Retnla-Tg and non-Tg mice after feeding with a HFD for four weeks, and transcriptional profiling was performed on individual samples using Affymetrix Mouse Genome chips (MG 430 2.0 array).

2014-06-06 | E-GEOD-58214 | biostudies-arrayexpress

LGP2 virus sensor enhances apoptosis by upregulating apoptosis-regulatory genes through TRBP-bound miRNAs during viral infection

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Expression profiles of zebrafish transgenic line Tg(fabp10a:def)-I

2013-02-28 | GSE41059 | GEO

Expression profiles of zebrafish transgenic line Tg(fabp10a:def)-I

Project description:We previously reported that Def (Digestive-organ expansion factor) was a pan-endodermal enriched factor that is essential for the growth of digestive organs in zebrafish using a def mutant line hi429 as model (Chen et al., 2005). To further elucidate Def function, we generated a Def over-expressed zebrafish line, namely Tg (fabp10a:def)-I, in which def expression was under the control of a liver-specific promoter fabp10a. We used microarrays to detail the global programme of gene expression in Tg (fabp10a:def)-I transgenic line compared with wild type zebrafish control, and identified distinct classes of differently regulated genes in Tg (fabp10a:def)-I line. Total RNA from the adult livers of three independent batches of 3-month-old Tg(fabp10a:def)-I and wild type (AB strain) male fish was extracted using TRIzol (Invitrogen), each batch with the liver samples from three fish mixed together. The samples were subjected to microarray hybridization and the data were generated for further analysis.

2013-02-28 | E-GEOD-41059 | biostudies-arrayexpress

The RIG-I like receptor LGP2 inhibits Dicer-dependent processing of long double-stranded RNA and blocks RNA interference in mammalian cells.

Project description:In vertebrates, the presence of viral RNA in the cytosol is sensed by members of the RIG-I like receptor (RLR) family , which signal to induce production of type I interferons (IFN). These key anti-viral cytokines act in a paracrine and autocrine manner to induce hundreds of interferon-stimulated genes (ISGs), whose protein products restrict viral entry, replication and budding. ISGs include the RLRs themselves: RIG-I, MDA5 and the least-studied family member, LGP2. In contrast, the IFN system is absent in plants and invertebrates, which defend themselves from viral intruders using RNA interference (RNAi). In RNAi, the endoribonuclease Dicer cleaves virus-derived double stranded RNA (dsRNA) into small interfering RNAs (siRNAs) that target complementary viral RNA for cleavage. Interestingly, the RNAi machinery is conserved in mammals and we have recently demonstrated that it is able to participate in mammalian antiviral defence in conditions in which the IFN system is suppressed. In contrast, when the IFN system is active, one or more ISGs act to mask or suppress antiviral RNAi. Here, we demonstrate that LGP2 constitutes one of the ISGs that can inhibit antiviral RNAi in mammals. We identify Dicer as an LGP2-associated protein and show that LGP2 inhibits Dicer cleavage of dsRNA into siRNAs both in vitro and in vivo. Further, we show that in cells lacking an IFN response, ectopic expression of LGP2 interferes with RNAi-dependent suppression of gene expression. Thus, the inefficiency of RNAi as a mechanism of antiviral defence in mammalian somatic cells can be in part attributed to Dicer inhibition by LGP2 induced by type I IFNs.

2018-01-17 | PXD008364 | Pride

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