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C. elegans microarrays: daf-2(-) vs. daf-2(-) xbp-1(-)

ABSTRACT: 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.

ORGANISM(S): Caenorhabditis elegans

PROVIDER: GSE20148 | GEO | 2010/02/03

SECONDARY ACCESSION(S): PRJNA125571

REPOSITORIES: GEO

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C. elegans microarrays: daf-2(-) vs. daf-2(-) xbp-1(-)

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. Two-condition experiment, daf-2(-) animals and daf-2(-) xbp-1(-) animals. 4 Biological replicates in daf-2(e1370) background: 4 sets of daf-2(e1370) animals and their matching daf-2(e1370) xbp-1(zc12) animals. 4 Biological replicates in daf-2(e1368) background: 4 sets of daf-2(e1368) animals and their matching daf-2(e1368) xbp-1(zc12) animals.

2010-02-02 | E-GEOD-20148 | biostudies-arrayexpress

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C. elegans daf-10(m79) mutants vs wild-type worms

Project description:Transcriptional profiling of whole day 1 adult C. elegans, comparing animals carrying the m79 mutation in the daf-10 gene and wild-type isogenic animals. Genes that act downstream of sensory neurons to influence longevity, dauer formation and pathogen responses in Caenorhabditis elegans Manuscript abstract:

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wt vs daf-2 C. elegans protein turnover

Project description:Most aging hypotheses revolve around the accumulation of some sort of damage resulting in gradual physiological decline and ultimately death. Avoiding protein damage accumulation by enhanced turnover should slow down the aging process and extend lifespan. However, lowering translational efficiency extends rather than shortens lifespan in C. elegans. We studied turnover of individual proteins in the conserved Insulin/Insulin-like Growth Factor (IGF-1) receptor mutant daf-2 by combining Stable Isotope Labeling by Nitrogen-15 in Caenorhabditis elegans and LC-MS/MS. Intriguingly, the majority of proteins displayed prolonged half-lives in daf-2, while others remained unchanged, signifying that longevity is not supported by high protein turnover. This slow-down of protein turnover was most prominent for components of the translation machinery and mitochondria. In contrast, the high turnover of lysosomal hydrolases and very low turnover of cytoskeletal proteins remained largely unchanged in daf-2. The slow-down of protein dynamics and decreased abundance of the translational machinery may point at the importance of anabolic attenuation in lifespan extension as suggested by the hyperfunction theory.

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Caenorhabditis elegans

Project description:C. elegans microarrays: daf-2(-) vs. daf-2(-) xbp-1(-)

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RNAi knock down of daf-2, daf-3, daf-16 in C. elegans over 0-48 hours

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