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Macrophage trafficking contributes to gut-brain crosstalk in hypertension

ABSTRACT: The main goal of this study is to investigate the impact of the IDL (Ion-Dyshomeostatic Larvae) condition on the transcriptomic profile of gut-resident macrophages in zebrafish larvae. While control larvae are raised in standard fish water (Danieau’s solution), IDL larvae are exposed to progressively diluted fish water, reaching a final dilution of 1:1500, starting at 2 days post-fertilization (dpf) (Apaydin et al., Cardiovasc Res 2023).

ORGANISM(S): Danio rerio

PROVIDER: GSE294651 | GEO | 2025/06/25

REPOSITORIES: GEO

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Insights into the modes of action of tritium on zebrafish, Danio rerio, early-life stages, using proteomic analyses

Project description:Tritium is an ubiquist radionuclide which can be found in the environment due to natural and anthropogenic activities, particularly in aquatic ecosystems. In this context, tritium effects on aquatic species such as fish have to be characterized. HTO (tritiated water) effects were therefore investigated in zebrafish, Danio rerio, a common model in toxicology and ecotoxicology with a fully sequenced genome. Experiments were conducted on early life stages. Larvae were exposed to 0.4 and 4 mGy/h of HTO until 10 days post fertilization. Tritium internalization was quantified and effects were investigated using a proteomic analysis. The global analysis of the proteome was performed after protein extraction at 7 and 10 dpf on zebrafish eggs exposed from 3 hpf to 10 dpf.

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Effect of swim-training on caudal fin development in zebrafish larvae

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Effect of swim-training on caudal fin development in zebrafish larvae

Project description:Genome-wide microarray analysis of the effects of swim-training on caudal fin development in zebrafish larvae. Zebrafish were subjected to swim-training from 5 days post fertilization (dpf) until 10 dpf. Subsequently, we performed a genome-wide microarray analysis on the caudal fins of control and trained fish at 10 dpf. The goal of the project was to investigate the effects of swim-training on the gene expression level during caudal fin development in zebrafish larvae. Two-condition experiment: control vs trained fish. RNA was isolated from pooled caudal fins of 15 control fish (in duplo: pooled control samples (C2 and C3)) and of 15 trained fish (in duplo: pooled trained samples( T2 and T3)). Subsequently, each pooled RNA sample of control and trained caudal fins was labeled with Cy3 and Cy5 in order to correct for dye bias. We included a technical replicate of the labeled C2 and T2 samples.

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Effects of the chlorophyll derivative 132-hydroxypheophytine a on zebrafish metabolomics

Project description:Zebrafish larvae were exposed from 3 DPF to 5 DPF to the chlorophyll derivative 13-2-hydroxypheophytine a. Metabolites were extracted with some modification of the protocol published by Lin et al 2019 (10.1016/j.bbrc.2019.04.003.). 3 experimental groups: DMSO 0.1% (solvent control) and hpa at 7.5 ug/ml (hpa1) and at 15 ug/ml (hpa2). All details can be found in the paper that published this data set. Title: Insights into the mechanism of action of the chlorophyll derivative 132-hydroxypheophytine a on reducing neutral lipid reserves in zebrafish larvae and mice adipocytes Authors: Ana Carrasco del Amor, Rene Hernandez Butista, Siegfried Ussar, Susana Cristobal, Ralph Urbatzka European Journal of Pharmacology accepted: 10/24/2023 doi: 10.1016/j.ejphar.2023.176158

2023-06-16 | MSV000092187 | MassIVE

Isosorbide di-(linoleate/oleate) stimulates pro-differentiation gene expression to restore the epidermal barrier and improve skin hydration

Project description:The breakdown of epidermal barrier and consequent loss of skin hydration is a feature of skin aging and eczematous dermatitis. Few treatments, however, resolve these underlying processes to provide full symptomatic relief. In this study, we generated a novel compound, isosorbide di-(linoleate/oleate) (IDL), by esterifying isosorbide with sunflower fatty acids. Topical effects of IDL in skin were compared to those of ethyl linoleate/oleate (EL), which has previously been shown to improve skin barrier function. Both IDL and EL down-regulated inflammatory gene expression, but IDL more effectively up-regulated the expression of genes associated with keratinocyte differentiation (e.g., KRT1, GRHL2, SPRR4). Consistent with this, IDL increased abundance of epidermal barrier proteins (filaggrin and involucrin) and prevented cytokine-mediated stratum corneum degradation. IDL also down-regulated expression of “unhealthy skin signature” genes linked to loss of epidermal homeostasis and uniquely repressed an interferon-inducible co-expression module activated in multiple skin diseases including psoriasis. In a double-blind placebo-controlled trial enrolling females with dry skin, 2% IDL lotion applied over 2 weeks significantly improved skin hydration and decreased transepidermal water loss (NCT04253704). These results demonstrate mechanisms by which IDL improves skin hydration and epidermal barrier function, supporting IDL as an effective intervention for treatment of xerotic pruritic skin.

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Transcriptional responses in newly-hatched Oryzias latipes associated with developmental malformations following diluted bitumen exposure

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.

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Differentially expressed genes after inhibition of methylation

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2013-07-11 | E-GEOD-48804 | biostudies-arrayexpress

Characterization of Triptolide-Induced Hepatotoxicity by Imaging and Transcriptomics in a Novel Zebrafish Model [miRA-seq]

Project description:Zebrafish larvae treated with triptolide (5 dpf larvae after exposure to triptolide (1.6μM) for 6 hours) or vehicle control.

2020-03-03 | GSE146200 | GEO

Characterization of Triptolide-Induced Hepatotoxicity by Imaging and Transcriptomics in a Novel Zebrafish Model [RNA-seq]

Project description:Zebrafish larvae treated with triptolide (5 dpf larvae after exposure to triptolide (1.6μM) for 6 hours) or vehicle control.

2020-03-03 | GSE146199 | GEO

Microcystin Genomic Effects on Zebrafish Larvae

Project description:Zebrafish (Danio rerio) were obtained from the Zebrafish Research Facility maintained in the Center for Environmental Biotechnology at the University of Tennessee. Fish husbandry, spawning, and experimental procedures were conducted with approval from the University of Tennessee Institutional Animal Care and Use Committee (Protocol #1690-1007). Water for holding fish and conducting experiments (hereafter referred to as fish water) consisted of MilliQ water (Millipore, Bedford, MA) with ions added: 19 mg/L NaHCO3, 1 mg/L sea salt (Instant Ocean Synthetic Sea Salt, Mentor, OH), 10 mg/L CaSO4, 10 mg/L MgSO4, 2 mg/L KCl. Embryos were obtained by spawning adult fish with no history of contaminant exposure. Fertilization of embryos took place at the same time (± 15 min.), such that larvae used in experiments were of similar age at the time of exposure. All activities (maintenance of adult fish, spawning, and experiments) were conducted in an environmental chamber with a temperature of 27± 1 ºC and 14:10h light:dark photoperiod.

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