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Rattus strain:Fisher 344

ABSTRACT: Transcriptome Profiling of Rat Liver exposed to Hexabromocyclododecane (HBCD)

PROVIDER: PRJNA395549 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR5890370.fastq.gz	Fastqsanger.gz
	SRR5890380.fastq.gz	Fastqsanger.gz
	SRR5890390.fastq.gz	Fastqsanger.gz
	SRR5890400.fastq.gz	Fastqsanger.gz
	SRR5890410.fastq.gz	Fastqsanger.gz

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Project description:To identify liver transcripts differentially expressed due to treatment with 1,3,5,7,9,11-hexabromocyclododecane (HBCD), we collected RNA from male Harlan Sprague Dawley rats exposed to 0, 0.06, 0.641, 6.41, 64.1 or 641 mg/kg HBCD, 5 days after exposure for animals 7 weeks of age. These samples were interrogated with the Affymetrix Rat Genome 230 2.0 GeneChip array. A total of 1,2,1,23, and 247 gene transcripts were differentially expressed due to HBCD treatment after exposure to 0.06, 0.641, 6.41, 64.1 or 641 mg/kg HBCD (false discovery rate (FDR) < 0.05).

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Persistence of furan-induced epigenetic aberrations in the livers of Fisher 344 rats

Project description:Furan is a heterocyclic organic compound produced in the chemical manufacturing industry and also found in a broad range of food products, including infant formulas and baby foods. Previous reports have indicated that the adverse biological effects of furan, including its liver tumorigenicity, may be associated with epigenetic abnormalities. In the present study we investigated the persistence of epigenetic alterations in rat liver. Male Fisher 344 (F344) rats were treated by gavage 5 days per week with 8 mg furan/kg body weight (bw)/day for 90 days. After the last treatment, rats were divided randomly into four groups; one group of rats was sacrificed 24 hours after the last treatment, while other groups were maintained without further furan treatment for an additional 90, 180, or 360 days. Treatment with furan for 90 days resulted in alterations in histone lysine methylation and acetylation, oxidative damage to DNA, and changes in the gene expression in the livers. A majority of these furan-induced molecular changes was transient and disappeared after the cessation of furan treatment. In contrast, histone H3 lysine 9, H3 lysine 27, and H3 lysine 56 showed a sustained and time-depended decrease in acetylation, which was associated with formation of heterochromatin and altered gene expression. These results indicate that furan-induced adverse effects may be mechanistically related to sustained changes in histone lysine acetylation that compromise the ability of cells to maintain and control properly the expression of genetic information.

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