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... Collagen is a major extracellular matrix component playing pivotal roles in maintaining the muscle growth and flesh texture of fish. Enhancement of collagen deposition in muscle by environmental factors serves as an effective way to improve quality of fish products. However, as a critical environmental factor in aquaculture, the effects of temperature on muscle growth and collagen metabolism in fi ...
... Ozonation is often applied to eliminate the recalcitrant contaminants in water. During the process, toxic transformation products (TPs) can be generated mainly via the reactions with ozone and hydroxyl radicals (•OH). However, the toxicity difference between the TPs generated from O₃ and •OH has not been well elucidated. In this study, we designed ozonation scenarios with different Rct values (the ...
... Persistent and semi-persistent halogenated compounds cause health problems for the animals occupying the upper level of the food web in the Baltic Sea. Atlantic salmon (Salmo salar), being a top piscivore in the Baltic Sea, has been observed to carry a large body burden of halogenated toxins. Here, a mixture of nine halogenated compounds belonging to different groups was created, based on the obse ...
... 3,3′,5,5′-Tetrabromobiphenyl (BB-80) was once used as additive flame retardants. Whether its early exposure and discontinued exposure alter thyroid function remains unknown. We investigate adverse effects after early-life exposure and discontinued exposure to BB-80 and hydroxylated BB-80 (OH-BB-80) on thyroid hormone (TH) levels, thyroid tissue, and transcriptome profiles in zebrafish larvae. BB-8 ...
... Pydiflumetofen (PYD) is primarily used to control fungal disease. The potential risks posed by PYD enantiomers to the aquatic ecosystem are currently unclear. In this study, the enantioselective toxicity and fate of PYD in Danio rerio were investigated, and the enantioselective toxic mechanism and metabolic pathway were explored. The acute toxicity of R-PYD was 10.7–14.7-fold than that of S-PYD ag ...
... Recent evidence has revealed that organophosphorus flame retardants (OPFRs) elicit a variety of toxic effects, including endocrine disruption. The present study examined estrogenic and growth inhibitory responses to OPFR metabolites in comparison to their parent compounds using zebrafish eleutheroembryos.¹1Eleutheroembryos are hatched embryos that still rely on their yolk for nutrition. For simpli ...
Danio rerio; Oriental traditional medicine; absorption; daidzein; demethylation; desorption; electrospray ionization mass spectrometry; excretion; formononetin; glibenclamide; glycemic effect; glycosylation; hydroxylation; metabolites; research planning
Abstract:
... Traditional Chinese medicine (TCM) has been used in clinical settings for over 2000 years in China. The study of the absorption, distribution, metabolism, and excretion (ADME) of TCM in vivo could be beneficial for the discovery of the active components in TCM. However, the conventional strategies used for ADME research are based on rodent models and have the characteristics of lengthy experimenta ...
... Metabolic models can be useful for rapid identification of suitable analytical targets to aid in the detection of new psychoactive substances (NPS) in human biological samples. In vitro and in vivo metabolic studies of the synthetic cannabinoid ADB-4en-PINACA were carried out using zebrafish and rat liver microsome models. Seventeen phase-I metabolites, including seventeen metabolites generated fr ...
... Although benzothiazole and its derivatives (BTHs) are considered emerging contaminants in diverse environments and organisms, little information is available about their contamination profiles and health impact in ambient particles. In this study, an optimized method of ultrasound-assisted extraction coupled with the selected reaction monitoring (SRM) mode of GC-EI-MS/MS was applied to characteriz ...
Yanli Man; Marianne Stenrød; Chi Wu; Marit Almvik; Roger Holten; Jihong Liu Clarke; Shankui Yuan; Xiaohu Wu; Jun Xu; Fengshou Dong; Yongquan Zheng; Xingang Liu
... Difenoconazole is a widely used triazole fungicide that has been frequently detected in the environment, but comprehensive study about its environmental fate and toxicity of potential transformation products (TPs) is still lacking. Here, laboratory experiments were conducted to investigate the degradation kinetics, pathways, and toxicity of transformation products of difenoconazole. 12, 4 and 4 TP ...
... Polycyclic aromatic hydrocarbons (PAHs) and titanium dioxide (TiO₂) nanoparticles (NPs) are photoactive environmental pollutants that can contaminate aquatic environments. Aqueous-phase interactions between PAHs and TiO₂–NPs are of interest due to their emerging environmental relevance, particularly with the deliberate application of TiO₂–NPs to remediate pollution events (e.g., oil spills). Our o ...
... Pyriproxyfen is a juvenile hormone analogue insecticide used worldwide. At present, the potential threat of pyriproxyfen to aquatic organism has not been well explored. In this work, the bioaccumulation, metabolic profile and toxicity of pyriproxyfen and its metabolites to zebrafish were studied, and the enantioselectivity of pyriproxyfen and the major chiral metabolites were also determined. Sixt ...
... Laccases are green biocatalysts that are advantageous in the bioremediation of the triphenylmethane dye malachite green (MG). Here, Cblac from Caldicellulosiruptor bescii was characterized to be a novel DUF152 laccase. Cblac mutant Mut8 was designed with enhanced thermostability, which was demonstrated by the Thermofluor assay, circular dichroism spectrum, and structural analyses. MG bioremediatio ...
... Organophosphate triesters are used worldwide as additives in flame retardants and plasticizer as a replacement of polybrominated diphenyl ethers. Increasing evidence on human exposure to and environmental contamination with organophosphorus flame retardants (OPFRs) requires an adequate toxicity assessment for this class of chemicals. While developmental toxicity of several OPFRs has been reported, ...
... The present study investigates the transformation of the antidepressant fluoxetine (FLX) by photo- and biodegradation and shows similarities and differences in transformation products (TPs). TPs were identified using LC–high-resolution mass spectrometry with positive and negative electrospray ionization. In a sunlight simulator, photodegradation was carried out using ultrapure water (pH 6, 8, and ...
... The current study reports on the toxicity, uptake, and biotransformation potential of zebrafish (embryos and larvae) exposed to benzotriazoles (BTs). Acute toxicity assays were conducted. Cardiac function abnormalities (pericardial edema and poor blood circulation) were observed from the phenotypic analysis of early life zebrafish embryos after BTs exposure. For the uptake and biotransformation ex ...
... Tricolsan (TCS), an antimicrobial agent, is considered as emerging pollutant due to its wide dispersive use in personal care products and high aquatic toxicity. In the present study, phase I metabolism of triclosan was investigated through laboratory electrochemical simulation studies. The products formed in the electrochemical (EC) cell were identified by online and offline coupling with QTRAP an ...
Danio rerio; Gonyaulax; biomass; hydroxylation; liquid chromatography; mass spectrometry; nuclear magnetic resonance spectroscopy; solvents; toxicity; yessotoxin
Abstract:
... Liquid chromatography–high-resolution mass spectrometry (LC-HRMS) analysis of a Namibian strain of Gonyaulax spinifera showed the presence of a number of yessotoxins (YTXs). Principal among these were YTX (1), homoYTX (2), and a tentative hydroxylated analogue that did not correspond to any previously confirmed YTX structures. Culturing the G. spinifera strain afforded sufficient biomass for purif ...
... This study explores the effect of high dietary arachidonic acid (ARA) levels (high ARA) compared with low dietary ARA levels (control) on the general metabolism using zebrafish as the model organism. The fatty acid composition of today’s ‘modern diet’ tends towards higher n-6 PUFA levels in relation to n-3 PUFA. Low dietary n-3:n-6 PUFA ratio is a health concern, as n-6 PUFA give rise to eicosanoi ...
... Understanding the metabolism of chemicals as well as the distribution and depuration of their main metabolites in tissues are essential for evaluating their fate and potential toxicity in vivo. Herein, we investigated the metabolism of six typical organophosphate (OP) flame retardants (tripropyl phosphate (TPRP), tri-n-butyl phosphate (TNBP), tris(2-butoxyethyl) phosphate (TBOEP), tris(2-chloroeth ...
... Microbial transformation is a remarkable tool for the structural modification of bioactive natural compounds converting them into more valuable biologically active derivatives. In order to obtain the bioactive metabolites of methyl cyperenoate, it was biotransformed using Cunninghamella elegans AS 3.2028 to afford eight new derivatives (1–8) including six new hydroxylated metabolites (2–6, 8), one ...
... Understanding bioaccumulation and metabolism is critical for evaluating the fate and potential toxicity of compounds in vivo. We recently investigated, for the first time, the bioconcentration and tissue distribution of triphenyl phosphate (TPHP) and its main metabolites in selected tissues of adult zebrafish. To further confirm the metabolites, deuterated TPHP (d₁₅-TPHP) was used in the exposure ...
... Polybrominated diphenyl ethers (PBDEs), a group of potential endocrine-disrupting chemicals (EDCs) have been shown to disrupt retinoid homeostasis in different species in both laboratory and field studies. However, the molecular mechanisms of interactions with the retinoic acid receptor (RAR) are not fully understood. Zebrafish have proven useful for investigating mechanisms of chemical toxicity. ...