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Dual Ligand Effects

ABSTRACT: We identified differentially expressed genes in response to single and double ligand treatments (LPS, IFG, 2MA, LPS plus 2MA, and LPS plus IFG). The majority of the regulated transcripts responded additively to dual ligand treatment. However, a significant fraction responded in a non-additive fashion. Several cytokines showing non-additive transcriptional responses to dual ligand treatment also showed non-additive protein production/secretion responses in separate experiments. Many of the genes with non-additive responses to LPS plus 2MA showed enhanced responses and encoded pro-inflammatory proteins. On the other hand, LPS plus IFG appeared to induce both non-additive enhancement and non-additive attenuation of gene expression. The affected genes were associated with a variety of biological functions. These experiments reveal both dependent and independent regulatory pathways and further analyses may point out the specific nature of the regulatory interactions. Keywords = Lipopolysaccharide Keywords = Interferon-gamma Keywords = 2-Methyl-thio-ATP Keywords = Dual Ligand Effects Keywords = Gene Expression Keywords = RAW 267.4 Keywords = Macrophage Keywords: repeat sample

ORGANISM(S): Mus musculus

PROVIDER: GSE1863 | GEO | 2004/10/23

SECONDARY ACCESSION(S): PRJNA90487

REPOSITORIES: GEO

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Dual Ligand Effects

Project description:We identified differentially expressed genes in response to single and double ligand treatments (LPS, IFG, 2MA, LPS plus 2MA, and LPS plus IFG). The majority of the regulated transcripts responded additively to dual ligand treatment. However, a significant fraction responded in a non-additive fashion. Several cytokines showing non-additive transcriptional responses to dual ligand treatment also showed non-additive protein production/secretion responses in separate experiments. Many of the genes with non-additive responses to LPS plus 2MA showed enhanced responses and encoded pro-inflammatory proteins. On the other hand, LPS plus IFG appeared to induce both non-additive enhancement and non-additive attenuation of gene expression. The affected genes were associated with a variety of biological functions. These experiments reveal both dependent and independent regulatory pathways and further analyses may point out the specific nature of the regulatory interactions. Keywords = Lipopolysaccharide Keywords = Interferon-gamma Keywords = 2-Methyl-thio-ATP Keywords = Dual Ligand Effects Keywords = Gene Expression Keywords = RAW 267.4 Keywords = Macrophage

2004-10-23 | E-GEOD-1863 | biostudies-arrayexpress

Gene expression of RAW 264.7 cells treated with LPS, IFG, 2MA, LPS PLUS IFG, and LPS PLUS 2MA

Project description:LPS plus IFG and LPS plus 2MA had non-additive effects on gene expression in RAW 264.7 cells Keywords: time course

2006-06-06 | GSE4962 | GEO

Gene expression of RAW 264.7 cells treated with LPS, ISO, PGE2, LPS PLUS ISO, and LPS PLUS PGE2

Project description:LPS plus ISO and LPS plus PGE2 had non-additive effects on gene expression in RAW 264.7 cells Keywords: time course

2006-06-06 | GSE4964 | GEO

Mus musculus

Project description:Gene expression of RAW 264.7 cells treated with LPS, IFG, 2MA, LPS PLUS IFG, and LPS PLUS 2MA

| PRJNA96717 | ENA

Project description:Expression profiling analyses for 5 maize inbreds and 4 hybrids, chosen to represent diversity in genotypes and heterosis responses, revealed a correlation between genetic diversity and transcriptional variation. The majority of differentially expressed genes in each of the different hybrids exhibited additive expression patterns, and ~25% exhibited statistically significant non-additive expression profiles. Among the non-additive profiles, ~80% exhibited hybrid expression levels between the parental levels, ~20% exhibited hybrid expression levels at the parental levels and ~1% exhibited hybrid levels outside the parental range. These findings indicate that the frequencies of additive and non-additive expression patterns are very similar across a range of hybrid lines. Keywords: Genotype comparison series

2008-01-26 | GSE10236 | GEO

Mus musculus

Project description:Dual Ligand Effects

| PRJNA90487 | ENA

Transcriptome analysis of BV2 cells in response to LPS stimulation

Project description:Mouse microglia (BV2 cells) were stimulated with a TLR4 ligand (E. coli LPS, 1 µg/ml) for 4h. The Agilent SurePrint G3 Mouse Gene Expression Microarray (G4852A) was used for the analysis, which provides full coverage of genes and transcripts with the most up-to-date content, including mRNAs and lincRNAs (http://www.chem.agilent.com/store/en_US/Prod-G4852A/G4852A). BV2 cells were grown to 80% confluence for four groups: the siRNA control (Group A, cells treated with a non-specific scrambied siRNA control), the LPS-stimulated (Group B, cells treated with the siRNA control plus LPS stimulation), lincRNA-Cox2 siRNA (Group C, cells treated with an siRNA to lincRNA-Cox2), and lincRNA-Cox2 siRNA/LPS stimulated (Group D, cells treated with the lincNRA-Cox2 siRNA plus LPS stimulation). Cells were treated with the siRNAs for 24h, followed by additional culture for 4h in the presence or absence of LPS (E. coli LPS, 1 µg/ml). Total RNAs were prepared with the RNeasy Mini kit (Qiagen) according to the manufacturer’s instruction (Ambion).

2016-04-18 | E-MTAB-3450 | biostudies-arrayexpress

Odontoblast-like cells and dental pulp fibroblasts stimulated with LTA, poly(I:C) and LPS.

Project description:Odontoblasts and fibroblasts are suspected to influence the innate immune response triggered in the dental pulp by micro-organisms that progressively invade the human tooth during the carious process. To determine whether they differ in their responses to oral pathogens, we performed a systematic comparative analysis of odontoblast-like cell and pulp fibroblast responses to TLR2, TLR3 and TLR4 specific agonists (lipoteichoic acid [LTA], double-stranded RNA and lipopolysaccharide [LPS], respectively). Cells responded to these agonists by differential up-regulation of chemokine gene expression. CXCL2 and CXCL10 were thus increased by LTA only in odontoblast-like cells, while LPS increased CCL7, CCL26 and CXCL11 only in fibroblasts. These data suggest that odontoblasts and pulp fibroblasts differ in their innate immune responses to oral micro-organisms that invade the pulp tissue. Keywords: cell type comparaison Dental pulp fibroblasts and Odontoblast-like cells stimulated with lipopolysaccharide, ipoteichoic acid or poly(I:C), or unstimulated. Triplicates.

2010-06-25 | E-GEOD-9560 | biostudies-arrayexpress

Odontoblast-like cells and dental pulp fibroblasts stimulated with LTA, poly(I:C) and LPS.

2007-12-07 | GSE9560 | GEO

Genipin inhibits LPS-induced acute systemic inflammation in mice

Project description:Genipin is a natural blue colorant in food industry. Inflammation is correlated with human disorders, and nuclear factor-κB (NF-κB) is the critical molecule involved in inflammation. In this study, the anti-inflammatory effect of genipin on the lipopolysaccharide (LPS)-induced acute systemic inflammation in mice was evaluated by NF-κB bioluminescence-guided transcriptomic analysis. Transgenic mice carrying the NF-κB-driven luciferase genes were administered intraperitoneally with LPS and various amounts of genipin. Bioluminescent imaging showed that genipin significantly suppressed LPS-induced NF-κB-dependent luminescence in vivo. The suppression of LPS-induced acute inflammation by genipin was further evidenced by the reductions of cytokine levels in sera and organs. Microarray analysis of these organs showed that the transcripts of 79 genes were differentially expressed in both LPS and LPS/genipin groups, and one third of these genes belonged to chemokine ligand, chemokine receptor, and interferon (IFN)-induced protein genes. Moreover, network analysis showed that NF-κB played a critical role in the regulation of genipin-affected gene expression. In conclusion, we newly identified that genipin exhibited anti-inflammatory effects in a model of LPSinduced acute systemic inflammation via downregulation of chemokine ligand, chemokine receptor, and IFN-induced protein productions. A total of 25 transgenic mice (female, 6 to 8 weeks old) were randomly divided into five groups of five mice: (1) mock, no treatment; (2) LPS (4 mg/kg), (3) LPS plus genipin (1 mg/kg), (4) LPS plus genipin (10 mg/kg), and (5) LPS plus genipin (100 mg/kg). Mice were challenged intraperitoneally with LPS and then with genipin 10 min later. Four hours later, mice were imaged for the luciferase activity, and subsequently sacrificed for ex vivo imaging, RNA extraction, and immunohistochemical staining.

2012-02-25 | E-GEOD-35934 | biostudies-arrayexpress

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