RNA-seq Analysis of wildtype (N2) C. elegans at the L4 stage on diets from the laboratory environment and natural environment
Ontology highlight
ABSTRACT:
ORGANISM(S): Caenorhabditis elegans
PROVIDER: GSE152794 | GEO | 2020/11/12
REPOSITORIES: GEO
Similar Datasets
Project description:To understand the impact of a diet on host health, we performed a number of assays with C. elegans reared on OP50 or HT115 E. coli. We observed that HT115 provided a substantial increase in resistance to Liquid Killing and abiotic stresses (e.g., heat shock, oxidative stress). This phenomenon was independent of the worms’ innate immune system. In the absence of any other obvious candidates, we turned to microarray transcriptional profiling to gain an unbiased picture of the differences that result from feeding C. elegans with HT115 instead of OP50. To our surprise, there was a relatively small number of genes differentially expressed between worms fed OP50 and HT115. Amongst them were several mitochondrially-associated genes, suggesting that the relevant difference may involve this organelle. Using a variety of approaches, we determined that worms fed HT115 exhibit increased mitochondrial health than their OP50 counterparts. Furthermore, supplementation of growing OP50 with cobalamin recapitulated virtually all of the HT115 phenotypes.
2019-02-21 | GSE97678 | GEO
Project description:Analysis of wildtype (N2) C. elegans fed different diets: E. coli OP50, E. coli HT115 and Comamonas DA1877 Dietary composition has major effects on physiology. Here we show that developmental rate, reproduction and lifespan are altered in C. elegans fed Comamonas DA1877 relative to those fed a standard E. coli OP50 diet. We identify a set of genes that change in expression in response to this diet, and use the promoter of one of these (acdh-1) as a dietary sensor. Remarkably, the effects on transcription and development occur even when Comamonas DA1877 is diluted with another diet, suggesting that Comamonas DA1877 generates a signal that is sensed by the nematode. Surprisingly, the developmental effect is independent from TOR and insulin signaling. Rather, Comamonas DA1877 affects cyclic gene expression during molting, likely through the nuclear hormone receptor NHR-23. Altogether, our findings indicate that different bacteria elicit various responses via distinct mechanisms, which has implications for diseases such as obesity and the interactions between the human microbiome and intestinal cells. 3 biological replicates for each condition, OP50 is reference sample
2013-03-28 | E-GEOD-43954 | biostudies-arrayexpress
Project description:Analysis of wildtype (N2) C. elegans fed different diets: E. coli OP50, E. coli HT115 and Comamonas DA1877 Dietary composition has major effects on physiology. Here we show that developmental rate, reproduction and lifespan are altered in C. elegans fed Comamonas DA1877 relative to those fed a standard E. coli OP50 diet. We identify a set of genes that change in expression in response to this diet, and use the promoter of one of these (acdh-1) as a dietary sensor. Remarkably, the effects on transcription and development occur even when Comamonas DA1877 is diluted with another diet, suggesting that Comamonas DA1877 generates a signal that is sensed by the nematode. Surprisingly, the developmental effect is independent from TOR and insulin signaling. Rather, Comamonas DA1877 affects cyclic gene expression during molting, likely through the nuclear hormone receptor NHR-23. Altogether, our findings indicate that different bacteria elicit various responses via distinct mechanisms, which has implications for diseases such as obesity and the interactions between the human microbiome and intestinal cells.
2013-03-28 | GSE43954 | GEO
Project description:(Part 1) Gene expression profiles of C. elegans in response to a 120 hour S. enterica infection. Synchronized larval stage 1 (L1) animals were exposed to S. enterica SL1344 for 36, 72, 96, or 120 hours. As an uninfected control, synchronized L1 animals were exposed to E. coli OP50 for 36 hours. (Part 2) Gene expression profiles of C. elegans in response to Tetracycline-mediated recovery from 72 hour and 96 hour S. enterica infections. Synchronized L1 animals were exposed to S. enterica SL1344 for 72 hours and then shifted to E. coli HT115 plus Tetracycline plates for 24 hours to resolve the infection. Synchronized L1 animals were exposed to S. enterica SL1344 for 96 hours and then shifted to E. coli HT115 plus Tetracycline plates for 24 hours to resolve the infection. Samples include 36 hours on OP50 (36hOP), 36 hours on SL1344 (36hSL), 72 hours on SL1344 (72hSL), 96 hours on SL1344 (96hSL), 120 hours on SL1344 (120hSL), 72 hours on SL1344 plus 24 hours on HT115-Tet (96hHT), 96 hours on SL1344 plus 24 hours on HT115-Tet (120hHT). Duplicate biological samples were included for each timepoint. 14 total samples. Agilent C. elegans expression microarray (GPL14144).
2014-07-26 | E-GEOD-54212 | biostudies-arrayexpress
Project description:Stressors may have negative or positive effects in dependence of the dose (hormesis). We studied this phenomenon in Caenorhabditis elegans by applying weak or severe abiotic (cadmium, CdCl2) and/or biotic stress (different bacterial diets) during cultivation/breeding of the worms, and determining developmental speed or survival rates and performing transcriptome profiling and RT-qPCR analyses to explore the genetic basis of the detected phenotypic differences. This study showed that a bacterial diet resulting in higher levels of energy resources in the worms (E. coli OP50 feeding) or weak abiotic and biotic stress especially promote the resistance against severe abiotic or biotic stress and the age-specific survival rate of WT.
2018-12-01 | GSE123183 | GEO
Project description:Homeostatic interactions between the host and its resident microbiota is important for normal physiological functions and if altered, it could lead to dysbiosis, a change in the structure and function of the microbiota, and as a result to various pathophysiologies. Altered structure in bacterial community is associated with various pathophysiologies, but we are just beginning to understand how these structural changes translate into functional changes. Environmental factors including pathogenic infections can lead to altered interactions between the host and its resident microbiota. We used microarray analysis and a C. elegans model system to gain insights on the mechanisms of functional changes in host-commensal bacteria interaction in the presence or absence of G. duodenalis and identified expression pattern in commensal bacteria that are characteristic of homeostatic and dysbiotic interactions. E. coli HB101 exposed to C. elegans in the presence or absence of G. duodenalis conditioned S-basal complete media for 24 hours were used for RNA extraction and hybridization on Affymetrix microarrays. We collected expression data for E. coli HB101, E. coli HB101 exposed to C. elegans, E. coli HB101 exposed to Giardia conditioned media, and E. coli HB101 exposed to both C. elegans and Giardia conditioned media.
2015-04-02 | E-GEOD-61092 | biostudies-arrayexpress
Project description:Analysis of wildtype (N2) C. elegans fed different diets: E. coli OP50, Comamonas DA1877, and Diluted Comamonas (1:1000 Comamonas DA1877:E. coli OP50) Dietary composition has major effects on physiology. Here we show that developmental rate, reproduction and lifespan are altered in C. elegans fed Comamonas DA1877 relative to those fed a standard E. coli OP50 diet. We identify a set of genes that change in expression in response to this diet, and use the promoter of one of these (acdh-1) as a dietary sensor. Remarkably, the effects on transcription and development occur even when Comamonas DA1877 is diluted with another diet, suggesting that Comamonas DA1877 generates a signal that is sensed by the nematode. Surprisingly, the developmental effect is independent from TOR and insulin signaling. Rather, Comamonas DA1877 affects cyclic gene expression during molting, likely through the nuclear hormone receptor NHR-23. Altogether, our findings indicate that different bacteria elicit various responses via distinct mechanisms, which has implications for diseases such as obesity and the interactions between the human microbiome and intestinal cells.
2013-03-28 | GSE43953 | GEO
Project description:Analysis of wildtype (N2) C. elegans fed different diets: E. coli OP50, Comamonas DA1877, and Diluted Comamonas (1:1000 Comamonas DA1877:E. coli OP50) Dietary composition has major effects on physiology. Here we show that developmental rate, reproduction and lifespan are altered in C. elegans fed Comamonas DA1877 relative to those fed a standard E. coli OP50 diet. We identify a set of genes that change in expression in response to this diet, and use the promoter of one of these (acdh-1) as a dietary sensor. Remarkably, the effects on transcription and development occur even when Comamonas DA1877 is diluted with another diet, suggesting that Comamonas DA1877 generates a signal that is sensed by the nematode. Surprisingly, the developmental effect is independent from TOR and insulin signaling. Rather, Comamonas DA1877 affects cyclic gene expression during molting, likely through the nuclear hormone receptor NHR-23. Altogether, our findings indicate that different bacteria elicit various responses via distinct mechanisms, which has implications for diseases such as obesity and the interactions between the human microbiome and intestinal cells. 3 biological replicates for each condition, OP50 is reference sample
2013-03-28 | E-GEOD-43953 | biostudies-arrayexpress
Project description:(Part 1) Gene expression profiles of C. elegans in response to a 120 hour S. enterica infection. Synchronized larval stage 1 (L1) animals were exposed to S. enterica SL1344 for 36, 72, 96, or 120 hours. As an uninfected control, synchronized L1 animals were exposed to E. coli OP50 for 36 hours. (Part 2) Gene expression profiles of C. elegans in response to Tetracycline-mediated recovery from 72 hour and 96 hour S. enterica infections. Synchronized L1 animals were exposed to S. enterica SL1344 for 72 hours and then shifted to E. coli HT115 plus Tetracycline plates for 24 hours to resolve the infection. Synchronized L1 animals were exposed to S. enterica SL1344 for 96 hours and then shifted to E. coli HT115 plus Tetracycline plates for 24 hours to resolve the infection.
2014-07-26 | GSE54212 | GEO
Project description:This series of samples comprises multiple early embryonic time courses for C. elegans. Time courses consisting of 10 time points each for 4 different genotypes are included: wild-type (strain N2 grown on E. coli strain OP50), pie-1(zu154) (progeny of homozygous mutant mothers [Unc] of strain JJ532 grown on E. coli strain OP50), pie-1(zu154);pal-1(RNAi) (progeny of homozygous mutant mothers [Unc] of strain JJ532 grown on E. coli strain HT115 expressing pal-1 hairpin RNA), and mex-3(zu155);skn-1(RNAi) (progeny of homozygous mutant mothers [Dpy] of strain JJ518 grown on E. coli strain HT115 expressing skn-1 hairpin RNA). Embryos were manually staged by morphology at the 4-cell stage and allowed to develop in water for defined amounts of time at 22 degrees C. RNA was amplified as described (Baugh et al. Development, 2003; Baugh et al. Nucleic Acids Research, 2001). This series of samples comprises all replicate data reported by Baugh et al. (Development, 2005).
2007-07-31 | E-GEOD-2180 | biostudies-arrayexpress