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Characterization of protoporphytin IX effects on X-ray irradiation in Hela cells in vitro

ABSTRACT: Hela cells were used to evaluate the protoporphytin IX (PpIX) effects on X-ray irradiation. Treatment conditions were (1) control group (untreated cells); (2) cells treated with 1 μg /ml PpIX for 6 hours; (3) cells irradiated with 3Gy X-rays; (4) cells treated with 1 μg /ml PpIX for 6 hours prior to irradiation with 3Gy X-rays.

ORGANISM(S): Homo sapiens

PROVIDER: GSE61805 | GEO | 2015/01/21

SECONDARY ACCESSION(S): PRJNA262172

REPOSITORIES: GEO

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Characterization of protoporphytin IX effects on X-ray irradiation in Hela cells in vitro

Project description:Hela cells were used to evaluate the protoporphytin IX (PpIX) effects on X-ray irradiation. Treatment conditions were (1) control group (untreated cells); (2) cells treated with 1 Œºg /ml PpIX for 6 hours; (3) cells irradiated with 3Gy X-rays; (4) cells treated with 1 Œºg /ml PpIX for 6 hours prior to irradiation with 3Gy X-rays. Hela cells gene expressions in 4 groups were measured at 24 hours after exposure to 0 and 3 Gy X-rays plus treatment with PpIX prior to irradiation.

2015-01-21 | E-GEOD-61805 | biostudies-arrayexpress

Silencing ferrochelatase in breast cancer cells MDA-MB-231

Project description:Aim was to identify novel targets of protoporphyrin-IX (PpIX) after silencing Ferrochelatase (FECH) enzyme. PpIX is a light sensitive metabolite of heme synthesis. Generation of PpIX is increased if FECH activity is suppressed. Here, silencing of FECH leads to down-regulation of PpIX, measured by a decrease of PpIX-specific fluorescence. PpIX is a photosensitizer used for photodynamic treatment of various carcinomas. Increasing PpIX leads to apoptosis of tumor cells.

2019-08-15 | GSE135845 | GEO

X-ray exposure of peripheral blood mononuclear cells

Project description:Peripheral blood mononuclear cells (PBMCs) were isolated using Histpaque-1077 (Sigma-Aldrich, Belgium) from 10 healthy donors (5 males, 5 females, aged 23-50). Isolated cells were resuspended at a density of 10^6 cells/ml and allowed to equilibrate to culture conditions at 37°C in a humidified 5% CO2 atmosphere. PBMCs were then exposed to 0.0 (sham), 0.1 or 1.0 Gy of X-rays (250 keV - 1 mA, 1 mm Cu) at a dose rate of 0.26 Gy/min. After irradiation, cells were incubated at 37°C in a humidified 5% CO2 atmosphere for 8 h before RNA extraction using the AllPrep DNA/RNA/protein Mini kit (Qiagen). Two weeks later, the experiment was repeated using fresh PBMCs from the same donors, resulting in a total of 60 RNA samples. Total RNA (250 ng) was used for hybridisation to GeneChip Human Gene 1.0 ST arrays (Affymetrix) using the WT expression kit (Ambion), GeneChip Terminal labeling kit (Affymetrix) and the GeneChip Hybridization, Wash and Stain kit (Affymetrix) according to the manufacturer's recommendations.

2016-01-14 | E-MTAB-3463 | biostudies-arrayexpress

Global transcriptional response to carbonic anhydrase IX deficiency in the mouse stomach

Project description:Background Carbonic anhydrases (CAs) are a family of enzymes that regulate pH homeostasis in various tissues. CA IX is an exceptional member of this family because in addition to the basic CA function, it has been implicated in several other physiological and pathological processes. Functions suggested for CA IX include roles in cell adhesion and malignant cell invasion. In addition, CA IX likely regulates cell proliferation and differentiation, which was demonstrated in Car9‾/‾ mice. These mice had gastric pit cell hyperplasia and depletion of chief cells; however, the specific molecular mechanisms behind the observed phenotypes remain unknown. Therefore, we wanted to study the effect of CA IX deficiency on whole-genome gene expression in gastric mucosa. This was done using Illumina Sentrix Mouse-6 Expression BeadChip arrays. The expression of several genes with notable fold-change values was confirmed by QRT-PCR. Results CA IX deficiency caused the induction of 86 genes and repression of 46 genes in the gastric mucosa. There was 92.9% concordance between the results obtained by microarray analysis and QRT-PCR. The differentially expressed genes included those involved in developmental processes and cell differentiation. In addition, CA IX deficiency altered the expression of genes responsible for immune responses and downregulated the expression of several digestive enzymes. Conclusions Microarray analysis identified several potential genes whose altered expression could explain the disturbed cell lineage phenotype in the Car9‾/‾ gastric mucosa. The results also indicated a novel role for CA IX in the regulation of immunologic processes and digestion. These findings reinforce the concept that the main role of CA IX is not the regulation of pH in the stomach mucosa. Instead, it is needed for proper function of several physiological processes.

2010-07-01 | GSE20981 | GEO

Proteome of CD4 T cells activated through the TCR in the presence of IL2 and IL12 - Part 1

Project description:To activate primary T cells, lymph nodes were removed and disaggregated. Cells were cultured in RPMI 1640 containing L-glutamine, 10% FBS, 50 μM β-mercaptoethanol and penicillin/streptomycin. Cells were stimulated with 1 μg/ml of the CD3 monoclonal antibody (2C11) and 2 μg/ml anti-CD28 (37.51) in the presence of cytokines IL12 (10 ng/ml) and 20 ng/ml IL2 (20 ng/ml). Cells were stimulated for 24 hours. Live TCR activated CD4+ cells were sorted for CD4+ and CD45.1+ expression and DAP1 exclusion prior to collection for proteomics processing. Mice were “wild-type” (ie non-TCR transgenic) from OT-2 CD45.1 expressing C57bl6 background maintained in-house line.

2019-03-29 | PXD012052 | Pride

RNAPolII CUT&Tag profiles of MDA-MB-231 cell line with repression of CDK genes and PRMT5

Project description:A clonal doxycycline inducible dCas9-KRAB MDA-MB-231 cell line to control repression of CDK genes and PRMT5. On day 1 of the experiment cells were infected with lentiviruses containing the appropriate targeting/NTC sgRNAs driven by the human U6 promoter at an MOI of ~3 for each virus to ensure all cells were transduced. Cells were transduced in DMEM + 10% FBS with the addition of 8 μg/mL polybrene. 16 hours after the time of transduction, media was changed to DMEM +10% FBS. 24 hours after this, the cell culture media was switched to DMEM + 10%FBS containing 2μg/mL puromycin to ensure no uninfected cells remain. 48 hours after this, cell culture media was changed to DMEM + 10%FBS containing 2 μg/mL puromycin and 1 μg/mL doxycycline to induce dCas9-KRAB expression. 48 hours after this, cells were processed for CUT&Tag library prep following the manufacturer's recommendations.

2023-05-01 | GSE227432 | GEO

GENCODE PCR-Seq Batch IX

Project description:GENCODE PCR-Seq Batch IX

| PRJEB3310 | ENA

Changes in gene expression in MKN45 cells in response to Helicobacter pylori lipopolysaccharide

Project description:This study set out to identify global changes in gene expression in MKN45 gastric epithelial cells following 8 hours stimulation with 10 μg/ml lipopolysaccharide (LPS) from the gastric pathogen H. pylori. Microarray analysis was used to compare changes in gene expression between cells treated with 10 μg/ml H. pylori LPS and untreated cells at the same time point.

2011-01-12 | GSE25147 | GEO

Changes in gene expression in AGS cells in response to Helicobacter pylori lipopolysaccharide

Project description:This study set out to identify global changes in gene expression in AGS gastric epithelial cells following 8 hours stimulation with 10 μg/ml lipopolysaccharide (LPS) from the gastric pathogen H. pylori. Microarray analysis was used to compare changes in gene expression between cells treated with 10 μg/ml H. pylori LPS and untreated cells at the same time point.

2011-01-12 | GSE25146 | GEO

Deinococcus radiodurans R1

Project description:Deinococcus radiodurans R1 Cells was treated with MMC (5 μg/ml) : Control treated with MMC (5 μg/ml) vs. bphPR deletion mutant treated with MMC (5 μg/ml)

| PRJNA254487 | ENA

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