Project description:Japanese medaka (Oryzias latipes) embryos were exposed to two concentrations of the water accommodated fractions and chemically-enhanced water accommodated fractions of two types of diluted bitumen (dilbit). Chemical-dispersion did not significantly alter transcriptional responses to dilbit toxicity but may have acted through alternative mechanisms to give similar phenotypic responses, such as normal swim bladder development. This study identified novel biomarkers in fish with or without visual malformations exposed to dilbit that can be used to assess aquatic ecosystem health. Microarray analyses identified novel biomarkers and gene networks in dilbit-exposed malformed embryos that were not evident in unaffected dilbit-exposed fish or in controls.

2020-05-12 | GSE142734 | GEO

Transcriptome profile of Stage 40 Oryzias latipes (Medaka) embryos II

Project description:In order to identify the effects of the absence of SEDL on Medaka transcriptome, we performed RNAseq experiments Transcriptome analysis of the liver of mice trated with CD95 activating antibody, compared with liver of mice trated with saline.

2024-05-03 | GSE186769 | GEO

Oryzias latipes

Project description:Medaka gene expression analysis

| PRJNA400545 | ENA

Variation of the genomic expression pattern after exposed to 17beta-estradiol in Japanese medaka (Oryzias latipes)

Project description:We assess gene expression patterns upon 17beta-estradiol (E2) exposure to Japanese medaka (Oryzias latipes) in order to appere the E2 effects using DNA microarray analysis. Larval medaka were exposed to 0, 3, 30 and 100 ng/L of E2 and concentration-dependent changes in gene expressions were examined using Agilent medaka DNA microarrays. At 7 day, fish were sacrificed and mRNA was extracted for gene expression analysis. In an effort to link gene expression changes to effects on higher levels of biological organization, sex characteristics, gonadal histology, GSI, and egg production and fertility were examined. In microarray experiments, the correlation factors between the controls were from 0.91 to 1.00 among control samples. We observed highly induced O. latipes Gene Indices (OLGI) related to egg-yolk protein such as vitellogenin and L-SF precursor etc., which were significantly affected in a concentration-dependent manner by E2 exposure. To clarify the function of expressed genes by E2 treatments, we selected statistically expressed genes from the microarray experiments. We found 190 genes and 72 genes which were statistically expressed in E2 treatment as induced and repressed genes, respectively. In the induced gene list, there were characteristic induced-genes in the categories of lipid metabolism, stress (oxidative stress, DNA and protein damage), and apoptosis with MAPK pathway. On the other hands, there were characteristic repressed genes in the categories of heat shock protein. Our result may suggest that gene expressions in yolk medaka is able to be used for detection of E2 effect by DNA microarray analysis. Larval medaka were exposed to 0, 3, 30 and 100 ng/L of E2 and concentration and time-dependent changes in gene expressions were examined using Agilent medaka DNA microarrays. At 7 day, three independent samples (one sample contained thirty whole medakas) were sacrificed and mRNA was extracted for gene expression analysis.

2010-05-01 | E-GEOD-17633 | biostudies-arrayexpress

Oryzias latipes

Project description:Transcriptomic profiles of Japanese medaka (Oryzias latipes) in response to alkalinity stress

| PRJNA137353 | ENA

Oryzias latipes

Project description:Global transcriptional response in Japanese medaka larvae following embryonic exposure to TCDD

| PRJNA343774 | ENA

Oryzias latipes

Project description:Transcriptome analysis of medaka (Oryzias latipes) exposed to tributyltin

| PRJDB9829 | ENA