Danio rerio
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA194579 | ENA |
REPOSITORIES: ENA
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Project description:In the present study transcriptome analysis was employed to investigate the early molecular responses to exposure to 17β-estradiol (CAS 50-28-2). Zebrafish embryos were exposed to 17β-estradiol according to OECD guidelines (OECD test No. 236). At the end of exposure time (96 hours), simultaneous RNA and protein extraction from 10 embryos was performed using a Macherey & Nagel RNA/protein extraction kit. The obtained RNA extracts were sequenced using Illumina NovaSeq 6000 system System and the obtained sequences went through bioinformatic analysis pipeline to Identify and count the detected gene sequences followed by differential gene expression analysis. Finally, potential substance specific biomarker candidates were refined and selected based on the differential expression patterns and the biological functions investigation of the detected DEGs.
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Project description:Transcriptional profiling of zebrafish (Danio rerio) livers comparing control untreated fish with fish treated with estrogen [17β-estradiol (E2)] for different time points (4, 12, 24, 48 hours).
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Project description:Female sex steroid hormones, estradiol-17β (E2) and progesterone (P4) regulate reproductive function and gene expression in a broad range of tissues. Given the central role of the liver in regulating homeostasis including steroid hormone metabolism, we sought to understand how E2-17β and P4 interact to affect global gene expression in liver. Eight ovariectomized cows were randomly assigned to 4 treatment groups applied in a replicated Latin Square design: 1) No hormone supplementation, 2) E2-17β treatment (ear implant), 3) P4 treatment (intravaginal inserts), and 4) E2-17β combined with P4. After 14 d of treatment, liver biopsies were collected, allowing 28 d intervals between periods. Changes in gene expression in the liver biopsies were monitored using Affymetrix bovine-specific arrays. Treatment with E2-17β altered expression of 479 genes, P4 472 genes, and combined treatment significantly altered expression of 468 genes. In total, 578 genes exhibited altered expression including a remarkable number (346 genes) that responded similarly to E2-17β, P4, or combined treatment. Additional evidence for similar gene expression effects of E2-17ß and/or P4 were: principal component analysis placed almost every treatment array at a substantial distance from control arrays; Venn diagrams indicated overall treatment effects for most regulated genes; clustering analysis indicated the two major clusters had all treatments upregulating (cluster 1; 172 genes) or downregulating (cluster 2: 173 genes) expression. Thus, unexpectedly, common biological pathways are regulated by E2-17β and/or P4 in liver. Future studies are needed to elucidate mechanism(s) responsible for overlapping actions of E2-17β and P4 on the liver transcriptome. KEYWORDS: estradiol, progesterone, global gene expression, liver, cows.
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