The construction and application of a post-traumatic growth intervention program for colorectal cancer patients and their spousal caregivers
Ontology highlight
ABSTRACT:
DISEASE(S): Colorectal Cancer
PROVIDER: 83919 | ecrin-mdr-crc |
REPOSITORIES: ECRIN MDR
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Project description:Marine ingredients can contain relatively high levels of arsenic. The main aim of this study is to assess the hepatic toxicity of arsenic species in Atlantic salmon (Salmo salar) in vitro. Primary hepatocytes were isolated from six male Atlantic salmon and exposed for 48 h to establish dose-response curves for arsenite (AsIII) (0.1-3 μM) and for arsenosugar (AsSug) (5-250 μM). Regarding arsenite, results obtained indicated that the dose between 0.1 and 1 represented a marked threshold for effect. Very few genes were differentially expressed (N=5, p-adjust < 0.1) following AsIII 0.1 µM treatment compared to AsIII 1µM (N=2338 p-adjust < 0.01). Similar was observed for AsSug exposure where exposure to 50 µM resulted in 195 DEGs (p-adjust < 0.1) vs 6899 (p-adjust < 0.01) following AsSug 250µM exposure
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Project description:The soil worm Enchytraeus crypticus (oligochaete) is an ecotoxicology model species although without genome or transcriptome sequence information. The present research aimed at studying, via high-throughput pyrosequencing, the transcriptome of Enchytraeus crypticus, sampled from multiple test conditions, and the construction of a high-density microarray for functional genomic studies. A pyrosequencing run retrieved approximately 1.5 million reads representing 645 million bases. After assembly, 27,296 contigs and 87,686 singletons were obtained. from which 44% and 25% were annotated as protein-coding genes. We show that the high amount of orphan genes is not due to poor sequence or assemble quality: 84% of the contig sequences contains an open reading frame with a start codon and E. crypticus homologs were identified for 92% of the core eukaryotic genes. Moreover, 65 and 77% of the unknown singletons and contigs, respectively, showed transcriptional activity. An Agilent 180K microarray platform was designed and validated by hybridizing cDNA from 3 day zinc- exposed E. crypticus to the concentration corresponding to 50% reduction in reproduction (EC50). Overall, 70% of all probes exerted a hybridization signal above background level. More specifically, the probes derived from contigs showed a wider range of average intensities when compared to probes derived from singletons. In total, 522 significantly regulated transcripts were identifying upon zinc exposure. Several significantly regulated genes exerted predicted functions (e.g. zinc efflux, zinc transport) associated with zinc stress. Unexpectedly, the microarray data suggest that zinc exposure alters retrotransposon activity in the E. crypticus genome. In conclusion, characterization of the presented E. crypticus transcriptome and associated microarray platform is a valuable and high quality resource that permits further functional genomics experiments examining gene expression patterns underlying distinct environmental stress conditions. We show that unknown sequences are not the result of technical errors but mostly represent functional genes that are actively transcribed.
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