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.
Project description:To identify DAF-16-dependent transcriptional alterations that occur in a long-lived C. elegans strain, we used cDNA microarrays and genomic analysis to identify putative direct and indirect DAF-16 transcriptional target genes. Set of arrays organized by shared biological context, such as organism, tumors types, processes, etc. Keywords: Logical Set
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.
Project description:DAF-12 is involved in development, dauer formation, and aging in Caenorhabditis elegans. To understand how DAF-12 is involved in these biologic processes, we performed chIP-chip using a DAF-12:TAP transgene and an anti-DAF-12 antibody. We identified 1175 genomic binding sites which were located within 5 kb of 3179 genes. These genes include known DAF-12 target genes as well as new genes involved in developmental timing, microRNA function, and stress resistance. The supplemental BED file contains all 1175 genomic binding sites described in our work.
Project description:Many studies have addressed the effect of dietary glycemic index on obesity and diabetes, but little is known about its effect on lifespan itself. We found that adding a small amount of glucose to the medium (0.1-2%) shortened the lifespan of C. elegans. Glucose shortened lifespan by inhibiting the activities of lifespan-extending transcription factors that are also inhibited by insulin signaling: the FOXO family member DAF-16 and the heat shock factor HSF-1. This effect involved the down-regulation of an aquaporin glycerol channel, aqp-1. We show that changes in glycerol metabolism are likely to underlie the lifespan-shortening effect of glucose, and that aqp-1 may act cell non-autonomously as a feedback regulator in the insulin/IGF-1 signaling pathway. Insulin down-regulates similar glycerol channels in mammals, suggesting that this glucose-responsive pathway might be conserved evolutionarily. Together these findings raise the possibility that a low-sugar diet might have beneficial effects on lifespan in higher organisms. Refer to individual Series. This SuperSeries is composed of the following subset Series: GSE18561: Adult C. elegans: Control daf-2 mutants treated with daf-16 RNAi vs. daf-2 mutants treated with empty vector RNAi GSE18562: Adult C. elegans: Control OP50 culture vs. OP50 + 2% glucose culture