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Transcriptional responses to nanoparticulate matter in human colon cancer cells.

ABSTRACT: This study evaluated transcriptional effects of particles smaller than 100 nm of carbon black, SiO2, Al2O3, TiO2, ZnO and Fe203. Since there is concern that inflammation may increase the uptake and/or toxicity of ultrafine particles, we evaluated the transcriptional responses without or with a TNFα pretreatment to mimic an inflammatory state. The most pronounced transcriptional response resulted from ZnO treatement, another response was to TNFα pre-treatment. We identified stress responses, responses to Zn ions, but did not observe a consistent proinflammatory response as evaluated by Gene Ontology of the genes that altered expression most as identified by significance analysis. Keywords: colon cancer cells - response to distinct nanoparticulate

ORGANISM(S): Homo sapiens

PROVIDER: GSE14910 | GEO | 2010/12/01

SECONDARY ACCESSION(S): PRJNA112017

REPOSITORIES: GEO

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Transcriptional responses to nanoparticulate matter in human colon cancer cells.

Project description:This study evaluated transcriptional effects of particles smaller than 100 nm of carbon black, SiO2, Al2O3, TiO2, ZnO and Fe203. Since there is concern that inflammation may increase the uptake and/or toxicity of ultrafine particles, we evaluated the transcriptional responses without or with a TNFα pretreatment to mimic an inflammatory state. The most pronounced transcriptional response resulted from ZnO treatement, another response was to TNFα pre-treatment. We identified stress responses, responses to Zn ions, but did not observe a consistent proinflammatory response as evaluated by Gene Ontology of the genes that altered expression most as identified by significance analysis. Keywords: colon cancer cells - response to distinct nanoparticulate Two colon cancer cell types (RKO and CaCo-2) were pretreated with 100 ng/ml BSA or TNFα for 1 hr, the media was exchanged and with media containing the nanoparticulate, and RNA was collected after 4 hrs. Generally, the RNA from 4 independent samples were combined for one sample on the microarray, the exceptions were the TNFα treated controls where 6 independent samples were combined in 2 sets of 3 for the microarray labeling and hybridizations.

2010-12-01 | E-GEOD-14910 | biostudies-arrayexpress

Transcriptional responses to nanoparticulate matter in human skin-derived cancer cells

Project description:This study evaluated transcriptional effects of particles smaller than 100 nm of TiO2 and ZnO. Based on previous data in colon cancer cells (GSE14910), we evaluated HaCaT and Sk Mel-28 cells for transcriptional responses to 1 and 5 ug/cm2 ZnO, or 5 and 10 ug/cm2 TiO2. No particle controls were also included. Again, the most pronounced transcriptional response resulted from ZnO treatement with little responses to TiO2. We identified increased protein stress responses, decreased regulation of transcription, and responses to Zn ions. We did not observe the protein stress response and regulation of transcription with soluble Zn. Keywords: skin-derived cancer cells - response to ZnO nanoparticulate

2011-11-01 | GSE25167 | GEO

Transcriptional responses to nanoparticulate matter in human skin-derived cancer cells

2011-11-01 | E-GEOD-25167 | biostudies-arrayexpress

Transcriptional responses to engineered nanoplatforms for drug delivery in primary human aortic endothelial cells.

2013-12-20 | GSE35142 | GEO

Transcriptional responses to engineered nanoplatforms for drug delivery in primary human aortic endothelial cells.

Project description:This study evaluated transcriptional effects of nanomaterials that have been proposed for use as platforms for drug delivery. We tested SiO2 that had been surface modified to have a positive zetapotential of different geometries as well PAMAM dendrimers with different surface charges. We tested these materials on human aortic endothelial cells (HAECs) since we were interested in determining if there was a toxicogenomic response in endothelial cells that may come into contact with drug delivery nanoplatforms. The most pronounced transcriptional response resulted from the SiO2 treatement - the most prevelant responses were cell cycle, lipid metabolism and pro-inflammatory responses - with fewer responses from the PAMAM dendrimers. The lipid metabolism responses may relate to teh positive surface character as this response was not observed in the G3.5-COOH dendrimers. Indeed, the G3.5-COOH dendrimers were non-toxic and did not demonstrate any consistent transcriptional response. Primary human aortic endothial cells (HAECs) were grown in 6 well plates (in 2 ml of medium) until they were >80% confluent by visual inspection. Daily media changes allowed continued growth for HAECs that demonstrate contact inhibition. The cells were then incubated with nanomaterials: surface modified SiO2 with worm and sphere goemetries (the spheres were 200 nm in diameter and the worm's cylindrical diameter 200 nm and the length was ~ 1000 nm); and PAMAM dendrimers with different surface charges (G3.5-COOH are negative and G4-NH2 are positive). RNA was collected after 4 and 24 hrs (one SiO2 worm sample was at 1.5 hrs due to space available on the 4-pack microarrays). Triplicate biological samples (indicated by the 'a', 'b', and 'c' designations in the sample names) were evaluated for gene expression changes by microarray analysis.

2013-12-20 | E-GEOD-35142 | biostudies-arrayexpress

Expression data from mouse liver tissue from SKH:QS mice treated with 68ZnO sunscreens

2013-09-11 | GSE46568 | GEO

Expression data from mouse liver tissue from SKH:QS mice treated with 68ZnO sunscreens

Project description:ZnO nanoparticles can elicit a range of perturbed cell responses in vitro. Exposure to topically applied sunscreens containing ZnO particles may or may not elicit a biological effect in mice. We aimed to determine whether exposure to topically applied ZnO particles manufactured as either microparticles or nanoparticles could elicit a biological response in liver tissue isolated from treated mice, compared to the sunscreen formulation only or untreated mice. Sunscreens containing 68ZnO microparticles, 68ZnO nanoparticles or no metal oxide particles at all (formulation only) were applied to the backs of SKH:QS mice six times over four days. On the fifth day mice were sacrificed and liver tissue was harvested for RNA isolation and whole genome transcriptional profiling, comparing the expression profiles of treated mice with untreated mice. Two separate experiments were conducted, one using virgin mice and the other using pregnant mice (~17d gestation)

2013-09-11 | E-GEOD-46568 | biostudies-arrayexpress

Expression data from mouse liver tissue from SKH:QS mice treated with commercially available sunscreens containing ZnO or TiO2 nanoparticles, or no nanoparticles

2016-07-26 | GSE84818 | GEO

Gene expression response to silica treatment in wild-type C57 black 6 mice vs Rag1 knockout, NK-depleted mice

Project description:The lung is constantly exposed to potentially pathogenic particles and microorganisms. It has recently become evident that not only innate, but also adaptive immune responses to particulates such as crystalline silica (SiO2) entering the respiratory tract are complex and dynamic events. Although the cellular mechanisms and anatomical consequences involved in the development of silicosis have been extensively studied, they still remain poorly understood. Based on their capacity for immune regulation, lymphocytes may play a role in determining the respiratory response to environmental challenge by SiO2. The objective of this study was to characterize the impact of SiO2 exposure on respiratory immune processes, with particular emphasis on evaluating the importance of lymphocytes in the murine silicosis model. Therefore, we utilized lymphopenic mice including NK deficient, Rag1-/- or a combination (Rag1-/- NK depleted) and demonstrated that SiO2-induced fibrosis and inflammation occur independently of T, B, NK T, and NK cells. Studies in Rag1-/- mice further suggest that lymphocytes may participate in controlling SiO2-induced inflammation through modulation of the Nalp3 inflammasome. This observation may have clinical relevance in the treatment of inflammatory and fibrotic lung diseases that are either refractory or respond sub-optimally to current therapeutics.

2009-12-19 | GSE19563 | GEO

Expression data from mouse liver tissue from SKH:QS mice treated with commercially available sunscreens containing ZnO or TiO2 nanoparticles, or no nanoparticles

Project description:ZnO and TiO2 nanoparticles can elicit a range of perturbed cell responses in vitro. Exposure to topically applied sunscreens containing ZnO or TiO2 particles may or may not elicit a biological effect in mice. We aimed to compare the biological responses of immune-competent hairless mice receiving topical applications of commercially available sunscreens with or without metal oxide nanoparticles, with the responses of mice receiving no sunscreen. Commercially available sunscreens containing ZnO nanoparticles, a mixture of TiO2 nanoparticles and organic UVR filters, or only organic UVR filters were applied to the backs of SKH:QS mice weekly over 36 weeks, with or without subsequent exposure to 29 kJ/m2 UVR. After 36 weeks and 30 treatments, mice were sacrificed and liver tissue was harvested for RNA isolation and whole genome transcriptional profiling, comparing the expression profiles of treated mice with untreated mice.

2016-07-26 | E-GEOD-84818 | biostudies-arrayexpress

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