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Gene expression data from C.elegans

ABSTRACT: Numerous studies have shown that resistance to oxidative stress is crucial to stay healthy and to reduce the adverse effects of aging. Accordingly, nutritional interventions using antioxidant food-grade compounds or food products are currently an interesting option to help improve health and quality of life in the elderly. Live lactic acid bacteria (LAB) administered in food, such as probiotics, may be good antioxidant candidates. Nevertheless, information about LAB-induced oxidative stress protection is scarce. To identify and characterize new potential antioxidant probiotic strains, we have developed a new functional screening method using the nematode Caenorhabditis elegans as host. C. elegans were fed on different LAB strains (78 in total) and nematode viability was assessed after oxidative stress (3mM and 5mM H2O2). One strain, identified as Lactobacillus rhamnosus CNCM I-3690, protected worms by increasing their viability by 30% and, also, increased average worm lifespan by 20%. We performed a transcriptomic analysis of C. elegans fed with this strain and showed that increased lifespan is correlated with differential expression of the DAF-16/insulin-like pathway, which is highly conserved in humans.

ORGANISM(S): Caenorhabditis elegans

PROVIDER: GSE42192 | GEO | 2012/12/31

SECONDARY ACCESSION(S): PRJNA179270

REPOSITORIES: GEO

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Gene expression data from C.elegans

Project description:Numerous studies have shown that resistance to oxidative stress is crucial to stay healthy and to reduce the adverse effects of aging. Accordingly, nutritional interventions using antioxidant food-grade compounds or food products are currently an interesting option to help improve health and quality of life in the elderly. Live lactic acid bacteria (LAB) administered in food, such as probiotics, may be good antioxidant candidates. Nevertheless, information about LAB-induced oxidative stress protection is scarce. To identify and characterize new potential antioxidant probiotic strains, we have developed a new functional screening method using the nematode Caenorhabditis elegans as host. C. elegans were fed on different LAB strains (78 in total) and nematode viability was assessed after oxidative stress (3mM and 5mM H2O2). One strain, identified as Lactobacillus rhamnosus CNCM I-3690, protected worms by increasing their viability by 30% and, also, increased average worm lifespan by 20%. We performed a transcriptomic analysis of C. elegans fed with this strain and showed that increased lifespan is correlated with differential expression of the DAF-16/insulin-like pathway, which is highly conserved in humans. Gene expression in C. elegans wild-type strain (N2) was analyzed in worm populations fed with E. coli OP50 (control condition) or the corresponding LAB (Lactobacillus rhamnosus CNCM I-3690 or Lactobacillus rhamnosus CNCM I-4317) . Three days and ten days feeding period was analyzed.

2012-12-31 | E-GEOD-42192 | biostudies-arrayexpress

Anti-aging effects of Vicatia thibetica de Boiss root extract on Caenorhabditis elegans and doxorubicin-induced mice via promoting collagen and stress resistance

Project description:The root of Vicatia thibetica de Boiss is a Chinese herb medicine with homology of medicine and food. We first report that HLB01 (the extract of Vicatia thibetica de Boiss root) extends lifespan and promotes healthy parameters in Caenorhabditis elegans (C. elegans). In doxorubicin-induced senescent mice, HLB01 counteracts senescence associated biomarkers significantly, including AST, ALT, p21 and γH2AX. Interestingly, HLB01 promotes the level of collagen in C. elegans and mammalian cell systemically, which might be one of the essential factors to exert anti-aging effects of HLB01. In addition, HLB01 can scavenge free radical to perform antioxidant ability. Lifespan extension of HLB01 also dependent on DAF-16 and HSF-1 to perform oxidative stress resistance and heat stress resistance. Taken together, these data indicate that HLB01 extends lifespan and healthspan of C. elegans, resists doxorubicin‐induced senescence in mice via collagen promoting, antioxidant and stress resistance.

2021-03-06 | GSE168322 | GEO

Extension of lifespan in C. elegans by naphthoquinones that act through stress hormesis mechanisms

Project description:Hormesis occurs when a low level stress elicits adaptive beneficial responses that protect against subsequent exposure to severe stress. Recent findings suggest that mild oxidative and thermal stress can extend lifespan by hormetic mechanisms. Here we show that the botanical pesticide plumbagin, while toxic to C. elegans nematodes at high doses, extends lifespan at low doses. Because plumbagin is a naphthoquinone that generates free radicals in vivo, we investigated whether it extends lifespan by activating an adaptive cellular stress response pathway. Mammalian NF-E2-related factor 2 (Nrf2) and its C. elegans ortholog SKN-1, mediate protective responses to oxidative stress by promoting target gene expression via antioxidant response elements (ARE). Genetic analyses showed that skn-1 mediates plumbagin’s lifespan-extending effect in C. elegans. Further screening of a series of plumbagin analogs identified three additional naphthoquinones that could induce SKN-1 targets in C. elegans. Naphthazarin showed skn-1-dependent lifespan extension, over an extended dose range compared to plumbagin, while the other naphthoquinones, oxoline and menadione, had differing effects on C. elegans survival and failed to activate ARE reporter expression in cultured mammalian cells. Our findings reveal the potential for low doses of naturally occurring naphthoquinones to extend lifespan by engaging a specific adaptive cellular stress response pathway.

2012-03-21 | GSE28301 | GEO

Crotamiton derivative JM03 extends lifespan and improves 1 oxidative and hypertonic stress resistance in Caenorhabditis 2 elegans via inhibiting OSM-9

Project description:While screening our in-house 1,072 marketed drugs for their ability to extend the lifespan using Caenorhabditis elegans (C. elegans) as an animal model, crotamiton (N-ethyl-o-crotonotoluidide) showed anti-aging activity and was selected for further structural optimization. After replacing the ortho-methyl of crotamiton with ortho-fluoro, crotamiton derivative JM03 was obtained and showed better activity in terms of lifespan-extension and stress resistance than crotamiton. It was further explored that JM03 extended the lifespan of C. elegans through osmotic avoidance abnormal-9 (OSM-9). Besides, JM03 improves the ability of nematode to resist oxidative stress and hypertonic stress through OSM-9, but not osm-9/capsaicin receptor related-2 (OCR-2). Then the inhibition of OSM-9 by JM03 reduces the aggregation of Q35 in C. elegans via upregulating the genes associated with proteostasis. SKN-1 signaling was also found to be activated after JM03 treatment, which might contribute to proteostasis, stress resistance and lifespan extension. In summary, this study explored a new small molecule derived from crotamiton, which has efficient anti-oxidative, anti-hypertonic and anti-aging effects, and could further lead to promising application prospects.

2021-09-17 | GSE184076 | GEO

Crotamiton derivative JM03 extends lifespan and improves oxidative and hypertonic stress resistance in Caenorhabditis elegans via inhibiting OSM-9

2022-04-10 | GSE200459 | GEO

Gene expression for treatment of bioceramic water

Project description:Increased oxidative stress induces impairment of the antioxidant defense systems and defects in regeneration of injured tissues. We aim to evaluate the effects of antioxidant bioactive ceramic water (JJ101) on tissue repairing and anti-aging. In vitro, myogenic and antioxidant factors were determined in satellite cells cultured in JJ101 media. Satellite cells grown in JJ101 medium displayed increased expression of Notch1, Pax7, AMP-activating protein kinase-alpha (AMPK-alpha) and anti-oxidant enzymes and significant protection against hydrogen peroxide-induced cell death. In vivo, JJ101 enhanced muscle regeneration via increased number of regenerating muscle fibers and reduced muscle fibrosis. The lifespan in SMP30 KO mice fed with a VC-deficient diet was extended by drinking JJ101. Moreover, the hepatic expression of AMPK-α in JJ101-fed SMP30 KO mice was comparable to that of VC-fed SMP30 KO mice, whereas it was suppressed in tap water-fed SMP30 KO mice. These results suggest that bioactive ceramic water improves antioxidant status through up-regulating antioxidant enzymes and AMPK and thereby provides a favorable niche for satellite cells, leading to an increase in muscle regeneration and compensates oxidative stress.

2020-12-01 | GSE80962 | GEO

Expression data from Caenorhabditis elegans fed with 13L cocoa peptide

Project description:Cocoa protein content is a very interesting source for isolation of antioxidant bio-peptides, which can be used for the prevention of age-related diseases. We use microarrays to study the global genome expression of C. elegans fed with a peptide (13L) isolated from cocoa. Wild type strain N2 of C. elegans was fed with 1 Âµg/mL of 13L peptide or in Nematode Growth medium (MGM, control fed) until reach young adult stage. Worm population were age-synchronized. RNA was isolated from each populations (control and treated) using RNAasy Kit (Qiagen) and hybridizated on Affymetrix microarrays.

2013-12-31 | E-GEOD-44318 | biostudies-arrayexpress

Characterization of the genes that were regulated by feeding with CBM 588

Project description:In the present study, we investigated the effect of CBM 588 on lifespan and multiple-stress resistance using Caenorhabditis elegans as a model animal. When adult C. elegans were fed a standard diet of Escherichia coli OP50 or CBM 588, the lifespan of the animals fed CBM 588 was significantly longer than that of animals fed OP50. Moreover, the worms fed CBM 588 were more resistant to certain stressors, including infections with pathogenic bacteria, UV irradiation, and the metal stressor Cu2+. CBM 588 failed to extend the lifespan of the daf-2/IR, daf-16/FOXO and skn-1/Nrf2 mutants. Transcriptional profiling comparing CBM 588-fed and control-fed animals suggested that DAF-16-dependent class II genes were regulated by CBM 588. In conclusion, CBM 588 extends the lifespan of C. elegans probably through regulation of the insulin/IGF-1 signaling (IIS) pathway and the Nrf2 transcription factor, and CBM 588 improves resistance to several stressors in C. elegans.

2018-12-01 | GSE123163 | GEO

RNA-seq analysis of Caenorhabditis elegans Transcriptomes after fed with D-mannose

Project description:we used Caenorhabditis elegans as a model organism, to investigate the effect of mannose on the lifespan. Using nematode RNAi methods, RT-PCR, RNA-seq and other experimental method, we explored the possible mechanism for how mannose change the lifespan of Caenorhabditis elegans.

2023-09-01 | GSE192579 | GEO

Tocotrienol Rich Fraction (TRF) Modulates Genes Expression in Oxidative Stress-Induced Caenorhabditis elegans

Project description:The study was done to determine the effect of Tocotrienol rich fraction (TRF) on the expression of RNAs in C. elegans under oxidative stress. Apart from its antioxidant properties, tocotrienols are beneficial to health due to its neuroprotective effect, anti-carcinogenic as well as cholesterol-lowering property. It has also been demonstrated that tocotrienols play a role in regulating signal transduction of cell death pathway. However, the molecular mechanism of how tocotrienols modulate the aging pathway is still scarce. To elucidate the molecular mechanism of lifespan extension by this antioxidant, the microarray technology is further used to analyze the changes in gene expression with TRF treatment in the present study.

2017-07-06 | GSE100814 | GEO

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