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Danio rerio

ABSTRACT: Selenoprotein H is an essential regulator of redox homeostasis that cooperates with p53 in development and tumorigenesis

PROVIDER: PRJNA339794 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR4050160_1.fastq.gz	Fastqsanger.gz
	SRR4050160_2.fastq.gz	Fastqsanger.gz
	SRR4050161_1.fastq.gz	Fastqsanger.gz
	SRR4050161_2.fastq.gz	Fastqsanger.gz
	SRR4050162_1.fastq.gz	Fastqsanger.gz

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Selenoprotein H is an essential regulator of redox homeostasis that cooperates with p53 in development and tumorigenesis

Project description:Selenium, one of a class of selenocysteine-containing proteins (selenoproteins), is an essential micronutrient known for its cancer prevention properties. Selenoprotein H (SepH) is a recently identified nucleolar oxidoreductase whose function is not well understood. Here we report that seph is an essential gene regulating organ development in zebrafish. Metabolite profiling by targeted LCMS/ MS demonstrated that SepH deficiency impairs redox balance by reducing the levels of ascorbate and methionine, while increasing methionine sulfoxide. Transcriptome analysis revealed that SepH deficiency induces an inflammatory response and activates the p53 pathway. Consequently, loss of seph renders larvae susceptible to oxidative stress and DNA damage. Finally, we demonstrate that seph interacts with p53 deficiency in adulthood to accelerate gastrointestinal tumor development. Overall, our findings establish that seph regulates redox homeostasis and suppresses DNA damage. We hypothesize that SepH deficiency may contribute to the increased cancer risk observed in cohorts with low selenium levels.

2016-08-29 | GSE85943 | GEO

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