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Change in expression of genes after retinoic acid treatment of stellate cells: time course

ABSTRACT: We evaluated the change in expression of genes after treatment of stellate cells with retinoic acid to understand how the stellate cells can de-differentiate and effect their physiological behaviour in pathological conditions. We then tested the changes in the gene expression in 2D and 3D culture conditions for pancreatic stellate cells and in a pancreatic cancer model. Keywords: gene expression change, time course We treated a pancreatic stellate cell line on plastic with 1 micromolar all-trans retinoic acid (ATRA) for timepoints of 30 mins, 4 hours, 12 hours, 24 hours and 168 hours. RNA was extracted and hybridized on Illumina Human microarrays. We looked for target genes regulated by ATRA and evaluated for time course change.

ORGANISM(S): Homo sapiens

SUBMITTER: Kocher Hemant

PROVIDER: S-ECPF-GEOD-14426 | biostudies-other |

REPOSITORIES: biostudies-other

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Change in expression of genes after retinoic acid treatment of stellate cells: time course

2011-12-30 | GSE14426 | GEO

Change in expression of genes after retinoic acid treatment of stellate cells: time course

Project description:We evaluated the change in expression of genes after treatment of stellate cells with retinoic acid to understand how the stellate cells can de-differentiate and effect their physiological behaviour in pathological conditions. We then tested the changes in the gene expression in 2D and 3D culture conditions for pancreatic stellate cells and in a pancreatic cancer model. Keywords: gene expression change, time course We treated a pancreatic stellate cell line on plastic with 1 micromolar all-trans retinoic acid (ATRA) for timepoints of 30 mins, 4 hours, 12 hours, 24 hours and 168 hours. RNA was extracted and hybridized on Illumina Human microarrays. We looked for target genes regulated by ATRA and evaluated for time course change.

2011-12-30 | E-GEOD-14426 | biostudies-arrayexpress

Change in expression of genes after retinoic acid treatment of stellate cells: dose response

Project description:We evaluated the change in expression of genes after treatment of stellate cells with retinoic acid to understand how the stellate cells can de-differentiate and effect their physiological behaviour in pathological conditions. We then tested the changes in the gene expression in 2D and 3D culture conditions for pancreatic stellate cells and in a pancreatic cancer model. Keywords: gene expression change, dose response, matrix conditions We treated a pancreatic stellate cell line on plastic or Matrigel with 1 or 10 micromolar dose of all-trans retinoic acid (ATRA). RNA was extracted and hybridized on Illumina Human microarrays. We looked for target genes regulated by ATRA and evaluated for dose repsonse and change due to background culture conditions.

| S-ECPF-GEOD-14425 | biostudies-other

Change in expression of genes after retinoic acid treatment of stellate cells

Project description:This SuperSeries is composed of the SubSeries listed below.

2011-12-30 | GSE14427 | GEO

Change in expression of genes after retinoic acid treatment of stellate cells

Project description:This SuperSeries is composed of the following subset Series: GSE14425: Change in expression of genes after retinoic acid treatment of stellate cells: Dose response GSE14426: Change in expression of genes after retinoic acid treatment of stellate cells: Time Course Refer to individual Series

2011-12-30 | E-GEOD-14427 | biostudies-arrayexpress

Change in expression of genes after retinoic acid treatment of stellate cells: dose response

2011-12-30 | GSE14425 | GEO

Change in expression of genes after retinoic acid treatment of stellate cells: dose response

Project description:We evaluated the change in expression of genes after treatment of stellate cells with retinoic acid to understand how the stellate cells can de-differentiate and effect their physiological behaviour in pathological conditions. We then tested the changes in the gene expression in 2D and 3D culture conditions for pancreatic stellate cells and in a pancreatic cancer model. Keywords: gene expression change, dose response, matrix conditions We treated a pancreatic stellate cell line on plastic or Matrigel with 1 or 10 micromolar dose of all-trans retinoic acid (ATRA). RNA was extracted and hybridized on Illumina Human microarrays. We looked for target genes regulated by ATRA and evaluated for dose repsonse and change due to background culture conditions.

2011-12-30 | E-GEOD-14425 | biostudies-arrayexpress

Hepatic stellate cells preferentially induce Foxp3+ regulatory T cells by production of retinoic acid.

Project description:The liver has long been described as immunosuppressive, although the mechanisms underlying this phenomenon are incompletely understood. Hepatic stellate cells (HSCs), a population of liver nonparenchymal cells, are potent producers of the regulatory T cell (Treg)-polarizing molecules TGF-β1 and all-trans retinoic acid, particularly during states of inflammation. HSCs are activated during hepatitis C virus infection and may therefore play a role in the enrichment of Tregs during infection. We hypothesized that Ag presentation in the context of HSC activation will induce naive T cells to differentiate into Foxp3(+) Tregs. To test this hypothesis, we investigated the molecular interactions between murine HSCs, dendritic cells, and naive CD4(+) T cells. We found that HSCs alone do not present Ag to naive CD4(+) T cells, but in the presence of dendritic cells and TGF-β1, preferentially induce functional Tregs. This Treg induction was associated with retinoid metabolism by HSCs and was dependent on all-trans retinoic acid. Thus, we conclude that HSCs preferentially generate Foxp3(+) Tregs and, therefore, may play a role in the tolerogenic nature of the liver.

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Retinoic acid (RA) induction time-course to profile gene expression during mES cell differentiation

Project description:Murine ES cell gene expression before RA induction are used to compare gene expression for time-points of 8, 12, 16, 24, 36, 48, 60 and 72 hours post-induction.

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Retinoic acid (RA) induction time-course to profile gene expression during mES cell differentiation.

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