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

ABSTRACT: 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

ORGANISM(S): Caenorhabditis elegans

PROVIDER: GSE5801 | GEO | 2007/02/08

SECONDARY ACCESSION(S): PRJNA97171

REPOSITORIES: GEO

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Transcription profiling of C. elegans mutants daf-2(e1368) and daf-2(e1368);pmk-1(km25), between daf-2(e1368), daf-2(e1368);daf-16(mgDf47)

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. Experiment Overall Design: Three independent biological replicates were isolated for each strain. All strains in a replicate were grown and harvested in parallel.

2008-06-14 | E-GEOD-5801 | biostudies-arrayexpress

Analysis of PMK-1 p38 MAPK and PMK-1(D327E) Caspase Cleavage Resistant Mutant and Effect of DAF-16 (FOXO) Mutants on Gene Regulation in C. elegans

Project description:We identified genes inversely regulated by pmk-1 null mutation and pmk-1(D327E). We also identified genes working through daf-16, working around daf-16 and working independent of daf-16

2022-07-12 | GSE192941 | GEO

Identification of DAF-16/FoxO targets associated with longevity

Project description:FoxO transcription factors can promote longevity in invertebrates and mammals. In C.elegans, the FoxO family member DAF-16 is required for lifespan extension in the contexts of daf-2/IGFR mutation and germline ablation. The daf-16 genomic locus encodes three distinct groups of transcripts (a,b, and d/f/h). In animals with reduced insulin signaling or ablated germlines, mutations that reduce daf-16a and d/f/h levels without affecting daf-16b reduce lifespan to the same extent as daf-16 null mutations. We reasoned that identifying a set of targets of the daf-16a and d/f/h isoforms that are differentially regulated in two contexts of reduced insulin signaling and in germline ablated animals would enrich for the daf-16 transcriptional targets that are required for longevity. We identified targets that were differentially regulated in daf-2(e1368) and daf-2(e1370) mutants relative to wild-type, and differentially regulated in the opposite direction from WT in compound mutants with both daf-16(mg54), which eliminates the a and d/f/h isoforms, and daf-16(mu86) which is a predicted null allele. We performed a similar analysis in glp-1(e2141) germline ablated animals (omitting the wild-type comparison). We then identified daf-16 targets associated with longevity (dal genes) which were found in all three sets of comparisons.

2019-03-01 | GSE111338 | GEO

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]

Project description:Genome maintenance defects cause complex disease phenotypes characterized by developmental failure, cancer susceptibility and premature aging. It remains poorly understood how DNA damage responses function during organismal development and maintain tissue functionality when DNA damage accumulates with aging. Here we show that the FoxO transcription factor DAF-16 is activated in response to DNA damage during development while the DNA damage responsiveness of DAF-16 declines with aging. We find that in contrast to its established role in mediating starvation arrest, DAF-16 alleviates DNA damage induced developmental arrest and even in the absence of DNA repair promotes developmental growth and enhances somatic tissue functionality. We demonstrate that the GATA transcription factor EGL-27 co-regulates DAF-16 target genes in response to DNA damage and together with DAF-16 promotes developmental growth. We propose that EGL-27/GATA activity specifies DAF-16 mediated DNA damage responses to enable developmental progression and to prolong tissue functioning when DNA damage persists.

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Endogenous DAF-16 genome-wide recruitment under low Insulin signalling condition in Caenorhabditis elegans

Project description:In order to understand the complexity of gene regulation downstream of IIS, we did RNA-seq in mixed culture in wild-type, daf-2(e1370), daf-16(mgDf50);daf-2(e1370) and daf-2(e1370);daf-12(m20 and correlated it with ChIP-seq data

2016-03-01 | GSE67975 | GEO

daf-16/FoxO isoform-specific deletion mutants

Project description:FoxO transcription factors promote longevity across taxa. How they do so is poorly understood. In the nematode Caenorhabditis elegans, the A- and F-isoforms of the FoxO transcription factor DAF-16 extend life span in the context of reduced DAF-2 insulin-like growth factor receptor (IGFR) signaling. To elucidate the mechanistic basis for DAF-16/FoxO-dependent life span extension, we performed an integrative analysis of isoform-specific daf-16/FoxO mutants. In contrast to previous studies suggesting that DAF-16F plays a more prominent role in life span control than DAF-16A, isoform-specific daf-16/FoxO mutant phenotypes and whole transcriptome profiling revealed a predominant role for DAF-16A over DAF-16F in life span control, stress resistance, and target gene regulation. Integration of these data sets enabled the prioritization of a subset of 92 DAF-16/FoxO target genes for functional interrogation. Among 29 genes tested, two DAF-16A-specific target genes significantly influenced longevity. Our discovery of new longevity genes underscores the efficacy of our integrative strategy while providing a general framework for identifying specific downstream gene regulatory events that contribute substantially to transcription factor functions. As FoxO transcription factors have conserved functions in promoting longevity and may be dysregulated in aging-related diseases, these findings promise to illuminate fundamental principles underlying aging in animals. Whole-transcriptome profiling of daf-16/FoxO isoform-specific deletion mutants in the long-lived daf-2(e1370) background. Included are daf-16 wild-type, daf-16 null mutation, daf-16a/f mutation, two independent daf-16a mutations, and daf-16f mutation. N2 wild-type controls are also included.

2015-08-27 | E-GEOD-72426 | biostudies-arrayexpress

Expression analysis of C. elegans wild-type N2 and rsks-1, daf-2, daf-2 rsks-1 and daf-16; daf-2 rsks-1 mutants

2013-11-14 | GSE52340 | GEO

Wild-type and daf-16(mgDf50) L1 larvae 3 hours after hatching in the presence or absence of food

Project description:This experiment was designed to identify early targets of daf-16/FoxO during L1 starvation in C. elegans. Previous work (Baugh et al 2009) examined temporal dynamics of gene expression in fed and starved L1 larvae using the same platform and methods. Here, a single time point was analyzed (~3 hr after hatching) in fed and starved larvae also comparing wild-type and a daf-16 null mutant. Statistical analysis includes pairwise comparisons between the four conditions as well as a two-factor analysis to explicitly identify genes affected by nutrient availability in daf-16-dependent fashion.

2017-05-24 | GSE99201 | GEO

Expression analysis of C. elegans wild-type N2 and rsks-1, daf-2, daf-2 rsks-1 and daf-16; daf-2 rsks-1 mutants

Project description:Investigation of whole genome gene expression level changes in C. elegans rsks-1, daf-2, daf-2 rsks-1 and daf-16; daf-2 rsks-1 mutant compared to the wild-type N2 strain. The mutants have altered longevity phenotypes. The mutants analyzed in this study are further described in Di Chen, Patrick Wai-Lun Li, Benjamin A. Goldstein, Waijiao Cai, Emma Lynn Thomas, Fen Chen, Alan E. Hubbard, Simon Melov and Pankaj Kapahi, Germline Signaling Mediates the Synergistically Prolonged Longevity by Double Mutations in daf-2 and rsks-1 in C. elegans, Cell Reports (CELL-REPORTS-D-13-00388). A 47 chip study using total RNAs from C. elegans wild-type N2 (9 replicates), rsks-1 mutant (9 replicates), daf-2 mutant (9 replicates), daf-2 rsks-1 double mutant (10 replicates) and daf-16; daf-2 rsks-1 triple mutant (10 replicates) measured gene expression levels at the whole genome level.

2013-11-14 | E-GEOD-52340 | biostudies-arrayexpress

daf-16/FoxO isoform-specific deletion mutants

2015-08-27 | GSE72426 | GEO