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Activation of AhR by ITE in DCs induces differential gene expression over time.

ABSTRACT: To evaluate the effects of AhR activation in dendritic cells (DCs) over time, DCs isolated from human blood or murine spleens were incubated with the AhR ligand ITE for 6 hours, 18 hours, or 72 hours. Treatment with ITE was found to induce transcriptional programs associated with immunoregulatory/ immunosuppressive mchanisms.

ORGANISM(S): Mus musculus Homo sapiens

PROVIDER: GSE155712 | GEO | 2021/08/04

REPOSITORIES: GEO

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Activation of AhR by ITE in DCs induces differential gene expression over time.

Project description:Activation of AhR by ITE in DCs induces differential gene expression over time.

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Expression profiling of four replicates of MCF-7 cells treated with 100nM TCDD

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2025-02-10 | PXD047834 | Pride

Endogenous aryl hydrocarbon receptor ligands-dysregulated transcriptomic profiles and endothelial function in human fetal endothelial cells

Project description:Preeclampsia (PE) is a hypertensive disorder and a leading cause of maternal and fetal mortality and morbidity during human pregnancy. Aryl hydrocarbon receptor (AhR), a ligand-activated transcription factor, regulates vascular development and function during pregnancy. Here, we report the important role of endogenous AhR ligands in endothelial growth and function during pregnancy using human umbilical vein endothelial cells (HUVECs) as a model. We found that ITE, ([2-(1’H-indole-3’-carbonyl)-thiazole-4-carboxylic acid methyl ester], an endogenous AhR ligand) decreased cell proliferation and monolayer integrity in HUVECs in vitro. ITE also dysregulated transcriptomic profiles of HUVECs in a fetal sex-specific manner. The ITE-dysregulated genes were enriched in biological function and pathways highly relevant to cardiovascular diseases, vascular function, and inflammation responses. We conclude that dysregulation of endogenous AhR ligands may contribute to the PE-impaired endothelial function through fetal sex-specific regulation of endothelial transcriptomes. These AhR ligand-activated genes and pathways might represent promising therapeutic and sex-specific targets for PE-impaired endothelial function.

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Project description:To identify aryl hydrocarbon receptor (AHR) dependent transcriptional changes in mouse colon stem cells, we performed RNA sequencing of colon organoids from wildtype and AhR deficient mice stimulated with an high affinity AHR ligand, 5nM FICZ for 4 hours.

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Endogenous aryl hydrocarbon receptor ligands-dysregulated transcriptomic profiles and vascular function in rat placentas

Project description:Preeclampsia (PE) is a hypertensive disorder and a leading cause of maternal and fetal mortality and morbidity during human pregnancy. Aryl hydrocarbon receptor (AhR), a ligand-activated transcription factor, regulates vascular development and function during pregnancy. Here, we report the important role of endogenous AhR ligands in vascular growth and function during pregnancy using a rat model. We found that exposure of pregnant rats to an endogenous AhR ligand (ITE, [2-(1’H-indole-3’-carbonyl)-thiazole-4-carboxylic acid methyl ester]) elevated maternal blood pressure and induced proteinuria, while decreased uteroplacental blood flow and fetal/ placental growth, all of which are hallmarks of PE. ITE also dysregulated transcriptomic profiles of rat placentas in a fetal sex-specific manner. The ITE-dysregulated genes were enriched in biological function and pathways highly relevant to diseases of heart, liver, and kidney, vascular function, and inflammation responses. Collectively, we conclude that dysregulation of endogenous AhR ligands may contribute to the PE-impaired vascular function through fetal sex-specific regulation of immune cell infiltration and transcriptomes. These AhR ligand-activated genes and pathways might represent promising therapeutic and sex-specific targets for PE-impaired vascular function.

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AhR antagonist

Project description:AhR antagonist

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2014-09-19 | E-GEOD-61559 | biostudies-arrayexpress

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2018-02-26 | PXD006089 | Pride

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Project description:The AhR is a ligand activated transcription factor that may be important in normal skin physiology. We compared gene expression profiles between AhR Wt and AhR KO primary mouse keratinocyte cultures. We identified 391 genes that were differentially expressed with a 1.5 fold cutoff and p<.05, and identified the AhR as an important regulator of genes involved in normal epidermal differentiation. AhR Wt primary keratinocyte cultures (n=4) were compared with AhR KO primary keratinocyte cultures (n=3)

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