Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Gene expression profiles in the cerebellum and hippocampus following exposure to neurotoxicant Aroclor 1254

ABSTRACT: Pregnant rats (Long-Evans) were dosed perinatally with 0 or 6 mg/kg/day of Aroclor 1254 from gestation day 6 through postnatal day (PND) 21. Gene expression in cerebellum and hippocampus from PND7 and PND14 animals was analyzed with an emphasis on developmental aspects. Changes in gene expression (≥ 1.5 fold) in control animals identified normal developmental changes. These basal levels of expression were compared to data from Aroclor 1254-treated animals to determine the impact of gestational PCB exposure on developmental parameters. The results indicate that the expression of a number of developmental genes related to cell cycle, synaptic function, cell maintenance, and neurogenesis is significantly altered from PND7 to PND14. Aroclor 1254 treatment appears to dampen the overall growth-related gene expression levels in both regions with the effect being more pronounced in the cerebellum. Functional analysis suggests that Aroclor 1254 delays maturation of the developing nervous system, with the consequences dependent on the ontological state of the brain area and the functional role of the individual gene. Keywords: time course, stress response

ORGANISM(S): Rattus norvegicus

PROVIDER: GSE13793 | GEO | 2009/01/31

SECONDARY ACCESSION(S): PRJNA110551

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Similar Datasets

Transcription profiling of rat cerebellum and hippocampus following exposure to neurotoxicant Aroclor 1254

Project description:Pregnant rats (Long-Evans) were dosed perinatally with 0 or 6Â mg/kg/day of Aroclor 1254 from gestation day 6 through postnatal day (PND) 21. Gene expression in cerebellum and hippocampus from PND7 and PND14 animals was analyzed with an emphasis on developmental aspects. Changes in gene expression (>= 1.5 fold) in control animals identified normal developmental changes. These basal levels of expression were compared to data from Aroclor 1254-treated animals to determine the impact of gestational PCB exposure on developmental parameters. The results indicate that the expression of a number of developmental genes related to cell cycle, synaptic function, cell maintenance, and neurogenesis is significantly altered from PND7 to PND14. Aroclor 1254 treatment appears to dampen the overall growth-related gene expression levels in both regions with the effect being more pronounced in the cerebellum. Functional analysis suggests that Aroclor 1254 delays maturation of the developing nervous system, with the consequences dependent on the ontological state of the brain area and the functional role of the individual gene. Experiment Overall Design: Pregnant rats (Long-Evans) were dosed perinatally with 0 or 6Â mg/kg/day of Aroclor 1254 from gestation day 6 through postnatal day (PND) 21. Gene expression in cerebellum and hippocampus from PND7 and PND14 animals was analyzed with an emphasis on developmental aspects.

2009-09-23 | E-GEOD-13793 | biostudies-arrayexpress

Toxicogenomic Analysis of Gender, Chemical, and Dose Effects in Livers of TCDD- or Aroclor 1254-Exposed Rats

Project description:Chronic exposure of Sprague-Dawley (SD) rats to either 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) or Aroclor 1254 results in female-selective induction of hepatic tumors. The relative potency of dioxins and PCB mixtures, such as Aroclor 1254, is often estimated using the internationally endorsed toxic equivalency (TEQ) approach. Comparing the genome wide changes in gene expression in both genders following exposure to toxic equivalent doses of these chemicals should identify critical sets of early response genes while further defining the concept of the TEQ of halogenated aromatic hydrocarbons. Aroclor 1254 at 0.6, 6.0 and 60 mg/kg body weight and TEQ doses of TCDD (0.3 and 3.0 µg/kg), calculated to match the top two Aroclor 1254 doses, were orally administered to SD rats for three consecutive days. Day 4 gene expression in hepatic tissue was determined using microarrays. A linear mixed-effects statistical model was developed to analyze the data in relation to treatment, gender, and gender*treatment (G*T) interactions. The genes most changed included 54 genes with and 51 genes without a significant model G*T term. The known aryl hydrocarbon receptor (AHR) battery genes (Cyp1a1, Cyp1a2, Cyp1b1, Aldh3a1), and novel genes, responded in a TEQ dose-dependent manner in both genders. However, an important observation was the apparent disruption of sexually dimorphic basal gene expression, particularly for female rats. Since many of these genes are involved in steroid metabolism, exposure to either TCDD or Aroclor 1254 could disrupt proliferative signals more in female rats as a possible consequence of altered estrogen metabolism. This study extends the findings of previous rodent bioassays by identifying groups of genes, other than the well-characterized AHR response genes, whose disruption may be important in the tumorigenic mechanism in this rat strain. Keywords: dose response, Multifactor Linear Model

2008-01-04 | GSE9838 | GEO

Signature of human hepatocytes treated with Aroclor1254

2006-08-01 | GSE5213 | GEO

Aroclor exposure zebrafish embryos

Project description:Zebrafish embryos have been exposed to Aroclor 1254 from 24 to 48 hours post fertilization

2016-10-14 | GSE88703 | GEO

Rattus norvegicus

Project description:Gene expression profiles in the cerebellum and hippocampus following exposure to neurotoxicant Aroclor 1254

| PRJNA110551 | ENA

Signature of human hepatocytes treated with Aroclor1254

Project description:In order to determine molecular rules for transcriptional regulation of targeted genes to explain in part the pleiotropic effect observed in animals and humans upon exposure to Aroclor 1254 we treated human hepatocytes with Aroclor1254 and analysed RNA expression using a Nimblegene human custom array. Human hepatocytes isolated from surgical material were treated with 20ÂµM Aroclor1254 for 72h. Non-treated cells served as control. Total RNA was isolated using QIAGENÂ´s RNeasy total RNA isolation kit according to the manufacturerâs recommendations. Oligonucleotide microarrays were hybridized and washed according to the manufacturerâs recommendations.

2010-07-01 | E-GEOD-5213 | biostudies-arrayexpress

Transcription profiling of liver from immature Platichthys flesus treated with model toxicants

Project description:Using the GENIPOL flounder cDNA microarray, we assessed the temporal transcriptomic responses of Platichthys flesus to model toxicants over a 16 day timespan. Immature fish were treated by intraperitoneal injection with cadmium chloride (50 micrograms/kg in saline), 3-methylcholanthrene (25mg/kg in olive oil), Aroclor 1254 (50mg/kg in olive oil), tert-butyl-hydroperoxide (5mg/kg in saline), lindane (25 mg/kg in olive oil), perfluoro-octanoic acid (100mg/kg in olive oil), olive oil or saline (0.9%). Hepatic gene expression changes were determined 1,2,4,8 and 16 days post-injection in comparison with time-matched carrier controls.

2009-06-16 | E-MAXD-32 | biostudies-arrayexpress

E-GEOD-13793

Project description:Transcription profiling of rat cerebellum and hippocampus following exposure to neurotoxicant Aroclor 1254

2015-08-28 | E-GEOD-13793 | ExpressionAtlas

Microarray analysis of Caenorhabditis elegans exposed to four indirect-acting toxicants

Project description:In this study, we exposed Caenorhabditis elegans wild types N2 to the model indirect-acting toxicants aflatoxin B1 (AFB1), benzo(a)pyrene (B(a)P), the PCB mixture Aroclor 1254 (PCB1254), and 2,3,7,8-tetrachlorodibenzodioxin (TCDD). In microarray experiments, we studied one concentration of AFB1 (30 μM), one concentration of B(a)P (30 μM), two concentrations of PCB1254 (1 μM and 30 μM), and two concentrations of TCDD (1 μM and 10 μM). As a control M9 medium with 0.5% DMSO was used. Age synchronized worms at developmental L4 larval stage were exposed to treatment for 24 hours. After flash freezing the samples, RNA was isolated, labeled and hybridized on oligo microarray (Agilent) slides.

2022-04-25 | E-MTAB-11143 | biostudies-arrayexpress

RNaseH2B single and compound mutant cerebellum

Project description:We utilized RNA-seq analysis to examine the loss of RNaseH2B in the mouse cerebellum over time. We have looked at single and compound mutant knockouts at ages from postnatal day five, postnatal day twenty-eight and nine-week-old animals.

2021-10-01 | GSE181159 | GEO

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data