Danio rerio
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA239951 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:In this experiment, we've examined chromatin conformation of zebrafish embryos at 24 and 48 hours post-fertilization (hpf), as well as 48 hpf fibroblasts. The aim of this study was to characterise the 3D chromatin structure of zebrafish and perform an evolutionary comparison with mammalian genomes (Homo sapiens and Mus musculus) focusing on syntenic regions and zebrafish ohnologs (duplicated genes that were kept in the genome after the third round of whole-genome duplication).
2023-11-17 | E-MTAB-6313 | biostudies-arrayexpress
Project description:WT vs MO-grnA injected: 16, 24, 48, 72 hpf trunk region of zebrafish embryos
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Project description:Expression data from 48 hpf WT and mne mutant zebrafish
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Project description:Increasing frequency and geographical distribution of harmful algal blooms (HABs) presents a growing threat to the public health. Saxitoxin (STX) is a potent neurotoxin naturally produced by dinoflagellates and cyanobacteria during HAB events. Consumption of seafood contaminated with STX is responsible for paralytic shellfish poisoning (PSP). STX inhibits voltage-gated sodium channels, affecting the propagation of action potentials. Humans are among the species most sensitive to PSP, and neurological symptoms of exposure range from tingling of the extremities to severe paralysis. To protect humans against PSP, there is a ban on harvesting of seafood when the STX levels reach 80 μg/100 g of shellfish tissue. However, shellfish with toxin levels below this regulatory limit often are harvested for consumption. Our objective is to understand the potential health effects of exposure to low levels of STX during sensitive windows of development. Zebrafish embryos were exposed to STX (24 or 48 pg) or vehicle (0.3 mM HCl) at 6 hours post fertilization (hpf) via microinjection. There was no overt toxicity, but starting at 36 hpf there was a temporary lack of pigmentation in STX-injected embryos, which resolved by 72 hpf. Using HPLC, we found that STX was retained in embryos up to 72 hpf in a dose dependent manner. We examined transcriptional profiles in embryos at 24, 36 and 48 hpf. There were no differentially expressed genes (DEGs) in STX-injected embryos at 24 hpf, but at 36 and 48 hpf there were_x000B_3547 and 3356 DEGs, respectively, in response to STX. KEGG pathway analysis revealed significant enrichment of genes related to focal adhesion, adherens junction and regulation of actin cytoskeleton, suggesting that cell-cell and cell-extracellular matrix interactions were affected by STX. The genes affected are critical for axonal growth and the development of functional neural networks. We also observed differential expression of axon guidance factors (netrins, semaphorins, and ephrins), which can control axon outgrowth. We are currently using immunohistochemistry to confirm these findings. Overall, these results suggest that STX exposure might affect axon outgrowth by modulating cell adhesion molecules. [NIH P01ES021923 and NSF OCE-1314642].
2022-07-31 | GSE204989 | GEO
Project description:Zebrafish 22 hpf embryos: WT vs. MO-grnA injected
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Project description:Defl1 knockdown gene expression in Zebrafish 12.5 hpf embryos
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Project description:This study profiled the transcriptome of zebrafish embryos harboring mutation in the Sin3A associated Protein 130a (sap130a) gene at 36 hours post fertilization (hpf). The sap130a mutant was generated via Cas9 mediated gene editing. Zebrafish sap130a mutants are viable presumable due to the presence of maternal RNA. Generation of maternal zygotic (MZ) mutants resulted in an incomplete penetrance of heart ventricle defects that were visible as early as 36 hpf. In this experiment the MZsap130a mutant embryos were further sorted for embryos with smaller ventricle (SV) vs normal size ventricle (NV). To extend on this study and to specifically analyze the heart, sap130a mutant and WT hearts at 48 hpf were extracted for RNA-seq analysis.
2023-05-31 | GSE228057 | GEO
Project description:Gene Expression analysis of transgenic RAS heatshock zebrafish embryos at 30 hpf
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Project description:Zebrafish whole embryos at 36 hpf treated with DMSO or 5uM 11,12-EET
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