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DAF-16 stabilizes the aging transcriptome and is activated in mid-aged C. elegans to cope with internal stress

ABSTRACT: DAF-16 stabilizes the aging transcriptome and is activated in mid-aged C. elegans to cope with internal stress

PROVIDER: PRJNA506829 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR8240860_1.fastq.gz	Fastqsanger.gz
	SRR8240860_2.fastq.gz	Fastqsanger.gz
	SRR8240870_1.fastq.gz	Fastqsanger.gz
	SRR8240870_2.fastq.gz	Fastqsanger.gz
	SRR8240880_1.fastq.gz	Fastqsanger.gz

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DAF-16 stabilizes the aging transcriptome and is activated in mid-aged C. elegans to cope with internal stress

Project description:The roles and regulatory mechanisms of transcriptome changes during aging are unclear. It has been proposed that the transcriptome suffers decay during aging owing to age-associated down-regulation of transcription factors. In this study, we characterized the role of a transcription factor DAF-16, which is a highly conserved lifespan regulator, in the normal aging process of Caenorhabditis elegans. We found that DAF-16 translocates into the nucleus in aged wild-type worms and activates the expression of hundreds of genes in response to age-associated cellular stress. Most of the age-dependent DAF-16 targets are different from the canonical DAF-16 targets downstream of insulin signaling. This and other evidence suggest that activation of DAF-16 during aging is distinct from activation of DAF-16 due to reduced signaling from DAF-2. Further analysis showed that it is due in part to a loss of proteostasis during aging, at least in part. We also found that without daf-16, dramatic gene expression changes occur as early as on adult day 2, indicating that DAF-16 acts to stabilize the transcriptome during normal aging. Our results thus reveal that normal aging is not simply a process in which the gene expression program descends into chaos due to loss of regulatory activities; rather, there is active transcriptional regulation during aging.

2018-11-26 | GSE122892 | GEO

DAF-16 stabilizes the aging transcriptome and is activated in mid-aged Caenorhabditis elegans to cope with internal stress.

Project description:The roles and regulatory mechanisms of transcriptome changes during aging are unclear. It has been proposed that the transcriptome suffers decay during aging owing to age-associated down-regulation of transcription factors. In this study, we characterized the role of a transcription factor DAF-16, which is a highly conserved lifespan regulator, in the normal aging process of Caenorhabditis elegans. We found that DAF-16 translocates into the nucleus in aged wild-type worms and activates the expression of hundreds of genes in response to age-associated cellular stress. Most of the age-dependent DAF-16 targets are different from the canonical DAF-16 targets downstream of insulin signaling. This and other evidence suggest that activation of DAF-16 during aging is distinct from activation of DAF-16 due to reduced signaling from DAF-2. Further analysis showed that it is due in part to a loss of proteostasis during aging. We also found that without daf-16, dramatic gene expression changes occur as early as on adult day 2, indicating that DAF-16 acts to stabilize the transcriptome during normal aging. Our results thus reveal that normal aging is not simply a process in which the gene expression program descends into chaos due to loss of regulatory activities; rather, there is active transcriptional regulation during aging.

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Project description:total RNA from N2, daf-1(m40), and daf-1(m40);daf-3(mgDf90) adult, gravid hermaphrodites were extracted and sequenced.

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RNAseq of dauer-forming C. elegans L2d in daf-2 and daf-2;daf-42

Project description:Under adverse environmental conditions, nematodes arrest into dauer, an alternative developmental stage for diapause. Dauers endure unfavorable environment and interact with host animals to access favorable environments, thus playing a critical role in the survival of both free-living and parasitic nematodes. Here, we discovered that in Caenorhabditis elegans, daf-42 is essential for development into dauer stage, as the null mutant shows lethal phenotype during dauer entry. To examine the transcriptional changes accompanied by the absence of DAF-42 during dauer entry, we performed RNA-sequencing on daf-2 and daf-2; daf-42 worms at 52 hours after egg laying (HAE) and 60 HAE, the time at which 0% and about 40% of daf-2; daf-42 mutants form dead dauer at 25 degrees Celcius, respectively. daf-2 control worms develop into dauer stage after 60 HAE, and half of its population develop into dauer by 72 HAE, when raised at 25 degrees Celcius.

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DAF-16/FoxO and EGL-27/GATA promote developmental growth in response to persistent somatic DNA damage [N2, daf-2, daf-16, daf-2;daf-16]

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Genes regulated by PMK-1 and DAF-16 in a daf-2(e1368) background.

Project description:Analysis of genes differentially expressed between daf-2(e1368) and daf-2(e1368);pmk-1(km25) and between daf-2(e1368) and daf-2(e1368);daf-16(mgDf47). These studies identified genes upregulated by wild-type PMK-1 and wild-type DAF-16. Keywords: genetic modification

2007-02-08 | GSE5801 | GEO

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Project description:Transcriptional profiling of day 1 animals comparing untreated daf-2(-) animals and daf-2(-) xbp-1(-) animals. Goal was to identify genes whose expression in daf-2 mutants is dependent (directly or indirectly) on xbp-1.

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mRNA-seq analysis of Caenorhabditis elegans wild type N2, daf-16(mu86), daf-18(ok480) and daf-16(mu86); daf-18(ok480) starved L1 larvae

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Adult C. elegans: Control daf-2 mutants treated with daf-16 RNAi vs. daf-2 mutants treated with empty vector RNAi

Project description:Transcriptional profiling of adult C. elegans comparing daf-16(-); daf-2(-) animals with adult daf-2(-) animals.

2010-01-01 | GSE18561 | GEO