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Oryzias latipes

ABSTRACT: Transcriptome analysis of the kidney and intestine isolated from freshwater- and seawater-aclimated Japanese Medaka.

PROVIDER: PRJDB10996 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	DRR261546.fastq.gz	Fastqsanger.gz
	DRR261547.fastq.gz	Fastqsanger.gz
	DRR261548.fastq.gz	Fastqsanger.gz
	DRR261549.fastq.gz	Fastqsanger.gz
	DRR261550.fastq.gz	Fastqsanger.gz

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Project description:Alkalinity stress is considered to be one of the major stressors for fish in saline-alkali water. Thus, it is of great significance from both aquaculture and physiological viewpoint to understand the molecular genetic response of aquatic organisms to alkalinity stress. The objective of this study is to determine genome-wide gene expression profiles to better understand the physiology response of medaka (Oryzias latipes) to high carbonate alkalinity stress. In lab-based cultures, adult fish were exposed to freshwater and high carbonate alkalinity water .We designed a microarray containing 26429 oligonucleotides and describe our experimental results for measuring gene expression changes in the gill of carbonate alkalinity stress exposed fish. The fish were exposed to freshwater (FW) and high carbonate alkalinity water (AW) for 96h, each with three replicates.

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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.

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