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Changes in expression of small non-coding RNAs/microRNAs during aging in C. elegans

ABSTRACT: We report a significant number of miRNAs and other non-coding small RNAs show dramatic changes in expression during aging in C. elegans. RNAs were prepared from four diffrent timepoints during adulthood of C. elegans hermaphrodites, Day 0, 5, 8 and 12 post-L4 molt, and used for making cDNA libraries for small RNAs. Each library was sequenced using recent advances in high-throughput sequencing technology, Solexa. This study should lead to a better understanding of the aging process and age-related diseases. For data usage terms and conditions, please refer to http://www.genome.gov/27528022 and http://www.genome.gov/Pages/Research/ENCODE/ENCODEDataReleasePolicyFinal2008.pdf

ORGANISM(S): Caenorhabditis elegans

PROVIDER: GSE18634 | GEO | 2009/12/31

REPOSITORIES: GEO

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Changes in expression of small non-coding RNAs/microRNAs during aging in C. elegans

Project description:We report a significant number of miRNAs and other non-coding small RNAs show dramatic changes in expression during aging in C. elegans. RNAs were prepared from four diffrent timepoints during adulthood of C. elegans hermaphrodites, Day 0, 5, 8 and 12 post-L4 molt, and used for making cDNA libraries for small RNAs. Each library was sequenced using recent advances in high-throughput sequencing technology, Solexa. This study should lead to a better understanding of the aging process and age-related diseases. For data usage terms and conditions, please refer to http://www.genome.gov/27528022 and http://www.genome.gov/Pages/Research/ENCODE/ENCODEDataReleasePolicyFinal2008.pdf Examination of small RNA expression in four timepoints during adulthood of C. elegans hermaphrodites (spe-9 (hc88), cultured at 23dC), Day 0, 5, 8 and 12 post L4-molt.

2009-12-31 | E-GEOD-18634 | biostudies-arrayexpress

Changes in expression of microRNAs during C. elegans development

Project description:Recent work has shown that small non-coding RNAs, including miRNAs, serve an important role in controlling gene expression during development and disease. However, little detailed information exists concerning the relative expression patterns of small RNAs during development of C. elegans. Here we use recent advances in high-throughput sequencing technology to show that expression of non-coding small RNAs, including miRNAs, changes dynamically during development and in the different sexes of C. elegans; approximately 16% of known miRNAs changed over 10 fold in expression during C. elegans development and about 12% of miRNAs showed major changes in expression between males and hermaphrodites of C. elegans. These results should lead to a better understanding of the expression and function of small RNAs in C. elegans development. For data usage terms and conditions, please refer to http://www.genome.gov/27528022 and http://www.genome.gov/Pages/Research/ENCODE/ENCODEDataReleasePolicyFinal2008.pdf Examination of small RNA expression in six different developmental stages of hermaphrodites (Embryo, mid-L1, mid-L2, mid-L3, mid-L4, young adult), and young adult males (dpy-28;him-8) and spermatogenesis-defective young adult hermaphrodites (spe-9). The number of sequence reads for miRNA was assessed from the raw sequence data from Solexa sequencing using perfect sequence matching to known miRNAs (miRBase Release 11.0).

2008-12-01 | E-GEOD-13339 | biostudies-arrayexpress

5'-monophosphate-independent small RNA sequencing from ego-1(om84) and control L3, L4, and adult C. elegans hermaphrodites

Project description:Cellular RdRPs play a critical role in the development of many organisms. Using high-throughput small RNA and messenger RNA sequencing we found that the Caenorhabditis elegans RdRP, EGO-1, is required to produce small RNAs antisense to a number of germline-expressed genes through several developmental stages. We found that these genes fall into distinct classes including genes required for kinetochore and nuclear pore assembly, as well as the production of histone-modifying and centromeric proteins. We also found several RNAi-related genes to be targets of EGO-1. Finally, we show a strong correlation between the loss of small RNAs and the rise of mRNA levels in ego-1 mutant animals. 5'-monophosphate-independent small RNA sequencing from ego-1(om84) and control L3, L4, and adult C. elegans hermaphrodites

2011-06-01 | E-GEOD-26581 | biostudies-arrayexpress

mRNA sequencing from ego-1(om84) and control L3, L4, and adult C. elegans hermaphrodites

Project description:Cellular RdRPs play a critical role in the development of many organisms. Using high-throughput small RNA and messenger RNA sequencing we found that the Caenorhabditis elegans RdRP, EGO-1, is required to produce small RNAs antisense to a number of germline-expressed genes through several developmental stages. We found that these genes fall into distinct classes including genes required for kinetochore and nuclear pore assembly, as well as the production of histone-modifying and centromeric proteins. We also found several RNAi-related genes to be targets of EGO-1. Finally, we show a strong correlation between the loss of small RNAs and the rise of mRNA levels in ego-1 mutant animals. mRNA sequencing from ego-1(om84) and control L3, L4, and adult C. elegans hermaphrodites

2011-06-01 | E-GEOD-26579 | biostudies-arrayexpress

Small RNA seq on C. elegans males and hermaphrodites that were either mock treated or exposed to the OrV

Project description:In this experiment we exposed L4 males and hermaphrodites to mock (M9) or Orsay virus for one hour in liquid. Subsequently, nematodes were collected 30 hours after exposure. The small RNAs were isolated and sequenced.

2021-07-01 | E-MTAB-10642 | biostudies-arrayexpress

Expression data from C. elegans during L4, L4-lethargus, and Adult

Project description:To identify genes differentially expressed during the molt, we collected RNA 30-40 minutes after feeding cessation at the start of the fourth larval stage (L4) lethargus. Additional time points for RNA collection were in the mid-L4 stage, approximately four hours prior to lethargus, and in the young adult stage, four hours after lethargus. These samples were interrogated with the Affymetrix C. elegans Genome Array. A total of 1,804 gene transcripts were up regulated, and 1,088 gene transcripts were down regulated, during the L4 lethargus period compared to the L4 and Adult stages (false discovery rate (FDR) < 0.05).

2014-04-18 | GSE46289 | GEO

The expression of small RNAs after prg-1 mutation

Project description:Piwi-related Argonaute proteins play important roles in maintaining germline integrity and fertility and have been linked to a class of germline-enriched small RNAs termed piRNAs. Caenorhabditis elegans encodes two Piwi family proteins called PRG-1 and PRG-2, and PRG-1 interacts with the C. elegans piRNAs (21U-RNAs). Previous studies found that the prg-1 mutation causes a marked reduction in the expression of 21U-RNAs, temperature-sensitive defects in fertility and other phenotypic defects.To systematically demonstrate the function of PRG-1 on regulating small RNAs and their targets. We use recent advances in high-throughput sequencing technology to show that expression of non-coding small RNAs in six stages(embryo,L1,L2,L3,L4,young audlt) and mRNAs in four stages (L1,L2,L3,L4) after prg-1 mutation. prg-1 mutation can not only lead to a decrease in the expression of 21U-RNAs, but also cause 35~40% of miRNAs to be significantly down-regulated; approximately 3% (6.00% in L4) of protein-coding genes are differentially expressed after mutating prg-1, and 60~70% of these substantially changed protein-coding genes are up-regulated. Examination of small RNA expression in six different developmental stages (embryo, L1, L2, L3, L4, young adult) and mRNA expression in four stages (L1,L2,L3,L4) of C. elegans prg-1 mutant (wm161) .

2014-06-09 | E-GEOD-56272 | biostudies-arrayexpress

The expression mRNAs after prg-1 mutation

2014-06-09 | E-GEOD-56271 | biostudies-arrayexpress

Changes in expression of microRNAs during C. elegans development

2008-12-01 | GSE13339 | GEO

Developmental characterization of the microRNAs-specific C. elegans Argonautes alg-1 and alg-2

Project description:This study analyzes miRNA association with ALG-1 and ALG-2 in different stages during larval development of C. elegans Staged animals (L1, L2, L3, L4) - the alg-2 mutant expressing tagged-ALG-2, alg-1 mutant, and wild type controls - were lysed. ALG-1 IP or ALG-2 (GFP) IP was performed using tags from all four samples at all four timepoints. Small RNAs were released from antibodies and 5' end-labelled with AlexaFluor532. Labelled RNA was hybridized to a custom microRNA microarray platform to quantify miRNA content.

2012-02-03 | E-GEOD-35505 | biostudies-arrayexpress

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