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Meyoid-specific deficiency of Glutamine Synthetase Aggravates LPS/D-GalN-induced liver injury via the activation of monocyte-derived macrophages

ABSTRACT: Meyoid-specific deficiency of Glutamine Synthetase Aggravates LPS/D-GalN-induced liver injury via the activation of monocyte-derived macrophages

PROVIDER: PRJNA956259 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR24185126_1.fastq.gz	Fastqsanger.gz
	SRR24185126_2.fastq.gz	Fastqsanger.gz
	SRR24185127_1.fastq.gz	Fastqsanger.gz
	SRR24185127_2.fastq.gz	Fastqsanger.gz
	SRR24185128_1.fastq.gz	Fastqsanger.gz

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Meyoid-specific deficiency of Glutamine Synthetase Aggravates LPS/D-GalN-induced liver injury via the activation of monocyte-derived macrophages

Project description:Glutamine synthase (Glul) is a key enzyme to synthesize glutamine, but its function in acute liver injury (ALI) remains unclear. Here, we investigated the regulatory role of Glul on immnuity in LPS/D-GalN-induced ALI. The study firstly found that the expression of Glul in myeloid cells was inhibited following LPS/D-GalN challenge. Then myeloid-specific knockout Glul mice were generated, which showed more severe ALI and higher mortality due to the activation of monocyte-derived macrophages (MoMFs) and the secretion of CCL2, as well as the recruitment of CCR2+ monocytes. Notably, liver injury can be relieved with adeno-associated virus (AAV)-mediated hepatic delivery of Glul via tail vein injection in mice. In conclusion, this research validates the protective effect of Glul against ALI.

2024-04-17 | GSE229818 | GEO

Cytosolic glutamine synthetase 1;1 knockout effects on rice roots

Project description:Goal of the study is to characterize distinct function(s) of two cytosolic glutamine synthetase (GS) in rice plants. We grew rice lacking GS1;1 and GS1;2 under the ammonium sufficient condition. We harvested roots from the two mutants as well as those of the corresponding control.

2019-04-01 | E-MTAB-6303 | biostudies-arrayexpress

Gene expression of cytosolic glutamine synthetase 1;1 knock-out mutant rice

Project description:Rice grown in paddy fields prefers to use ammonium ions as a major source of inorganic nitrogen. Glutamine synthetase (GS) catalyzes the conversion of ammonium ions to glutamine. In three cytosolic GS in rice, OsGS1;1 has the critical role for normal growth and grain filling. To understand a role of GS1;1, we performed transcriptional profiling of wild type Nipponbare and GS1;1 mutant plants in seedling using the Agilent Rice Oligo Microarray.

2010-03-01 | GSE15122 | GEO

Methionine Sulfoximine Resistance in Mycobacterium tuberculosis Is Due to a Single Nucleotide Deletion Resulting in Increased Expression of the Major Glutamine Synthetase, GlnA1.

Project description:We investigated the effect of methionine sulfoximine (MetSox), a potent inhibitor of glutamine synthetase, on Mycobacterium tuberculosis. M. tuberculosis encodes four glutamine synthetases, of which MetSox targets the type I enzyme encoded by glnA1. Trancriptional profiling revealed that glutamate synthetase (gltB) and a type II glutamine synthetase (glnA3) were induced after exposure to MetSox. In addition, we observed a high rate (10(-5)) of spontaneous resistance to MetSox. All resistant strains had a single-nucleotide deletion in the 5' region of glnA1, and Western analysis revealed that GlnA1 expression was increased in resistant as compared with sensitive strains. These data show that M. tuberculosis can respond to the effect of MetSox inhibition either by up-regulation of GlnA3 or by GlnA1. The high frequency of resistance suggests that MetSox and other compounds specifically targeting GlnA1 are not likely to become successful anti-mycobacterial agents. Data is also available from http://bugs.sgul.ac.uk/E-BUGS-112

2011-09-06 | E-BUGS-112 | biostudies-arrayexpress

Microarray analysis of gene expression in rice lacking cytosolic glutamine synthetase 1;2

Project description:Goal of the study is to characterize specific function(s) of the cytosolic glutamine synthetase (GS) 1;2 for apical meristem induction in rice plants. To address the issue, we conducted transcript profiling toward basal parts of the knockout mutant lacking GS1;2. We used microarrays conduct transcript profiling of gs1;2 plants. Wild-type samples were used as control.

2014-11-28 | GSE62124 | GEO

Yeast glutamine tRNA synthetase doxycycline shut-off

Project description:During protein synthesis, charged tRNAs deliver amino acids to translating ribosomes, and are then re-charged by tRNA synthetases (aaRS). In humans, mutant aaRS cause a diversity of neurological disorders, but their molecular aetiologies are incompletely characterised. To understand system responses to aaRS depletion, the yeast glutamine aaRS gene (GLN4) was transcriptionally regulated using doxycycline by tet-off control. Depletion of Gln4p inhibited growth, and induced a transcriptional GCN4 amino acid starvation response, indicative of uncharged tRNA accumulation and Gcn2 kinase activation. The GCN4 response was confirmed using SILAC proteomics, using heavy isotope labelling to identify changes in protein expression during glutamine tRNA synthetase depletion.

2020-02-12 | PXD017140 | Pride

The sRNA NsiR4 is involved in nitrogen assimilation control in cyanobacteria by targeting glutamine synthetase inactivating factor IF7

Project description:Glutamine synthetase (GS), a key enzyme in biological nitrogen assimilation, is regulated in multiple ways in response to varying nitrogen sources and levels. Here we show a small regulatory RNA, NsiR4 (nitrogen stress induced RNA 4), which plays an important role in the regulation of GS in cyanobacteria. NsiR4 expression in the unicellular Synechocystis sp. PCC 6803 and in the filamentous, nitrogen-fixing Anabaena sp. PCC 7120 is stimulated through nitrogen-limitation via NtcA, the global transcriptional regulator of genes involved in nitrogen metabolism. NsiR4 is widely conserved throughout the cyanobacterial phylum, suggesting a conserved function. In silico target prediction, transcriptome profiling upon pulse overexpression and site-directed mutagenesis experiments using a heterologous reporter system showed that NsiR4 interacts with the 5’UTR of gifA mRNA, which encodes glutamine synthetase inactivating factor IF7. In Synechocystis, we observed an inverse relationship between the levels of NsiR4 and the accumulation of IF7 in vivo. This NsiR4-dependent modulation of gifA (IF7) mRNA accumulation influenced the glutamine pool and thus NH4+ assimilation via glutamine synthetase. As a second target, we identified ssr1528, a hitherto uncharacterized nitrogen-regulated gene. Competition experiments between wild type and an NsiR4 knock-out mutant showed that the lack of NsiR4 led to decreased acclimation capabilities of Synechocystis towards oscillating nitrogen levels. These results suggest a role for NsiR4 in the regulation of nitrogen metabolism in cyanobacteria, especially for the adaptation to rapid changes in available nitrogen sources and concentrations. NsiR4 is the first identified bacterial sRNA regulating the primary assimilation of a macronutrient.

2015-10-20 | GSE73840 | GEO

The effect of Glutamine synthetase on the expression profile in the macrophages with LPS treatment

Project description:The effect of Glutamine synthetase on the expression profile in the macrophages with LPS treatment

| PRJNA788539 | ENA

Peroxynitrite-mediated post-translational modification of human glutamine synthetase

Project description:The aim of the project was to understand the mechanisms that underlie the oxidative inactivation of human glutamine synthetase (HsGS). For that purpose, we expressed and purified recombinant HsGS, exposed it in phosphate buffer to peroxynitrite (ONOO-) and assessed the functional and structural consequences. To characterize the oxidative post-translational modifications induced by ONOO-, several approaches were carried out (e.g. SDS-PAGE, western-blot, amino acid quantification by LC, etc). The most detailed characterization was performed through LC-MS/MS analysis after trypsin digestion of the ONOO--treated protein, which allowed us to identify the amino acid residues that are modified and to estimate the extent of such modifications.

2023-05-10 | PXD037583 | Pride

Glutamine synthetase regulates the alternative metabolism of γ-aminobutyrate in oral squamous cell carcinoma

Project description:More than 90% of cancer cases in head and neck region are oral squamous cell carcinoma. Recent studies identified several tumor-specific metabolites for the screening or diagnosis of OSCC patients. However, the metabolic reprogramming of OSCC is not well understood. Here, we compared the metabolites between cancerous and paracancerous tissues of OSCC patients and investigated the metabolism of γ-aminobutyrate in OSCC derived cells. Our data revealed that the increase of γ-aminobutyrate was promoted by the synthesis of glutamate beyond the mitochondria, which was regulated by glutamine synthetase. This study is not only benefit for understanding the pathological mechanisms of OSCC, but also has application prospects for the diagnosis and therapy of OSCC.

2023-07-06 | GSE222879 | GEO

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