Oxidative pathways of chemical toxicity and oxidative stress biomarkers in marine organisms

Regoli, Francesco; Giuliani, Maria

doi:10.1016/j.marenvres.2013.07.006

Cited by 731 publications

(404 citation statements)

References 104 publications

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“…This alteration of the immune response is also suggested by the change in expression of two key regulators of the response to pathogens: a complement factor H homolog (Ferreira et al 2010) and a tripartite motif-containing (TRIM) protein (Ozato et al 2008). Trace metals and organic xenobiotics are typical classes of environmental pollutants with prooxidant effects (Regoli and Giuliani 2014). The presence of an oxidative stress response was suggested by the differential expression of a glutathione peroxidase (GPx) and a cysteine sulfinic acid decarboxylaselike (CSAD) protein.…”

Section: Resultsmentioning

confidence: 99%

Transcriptomic responses of the endangered freshwater mussel Margaritifera margaritifera to trace metal contamination in the Dronne River, France

Bertucci

Pierron

Thébault

et al. 2017

Environ Sci Pollut Res

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The freshwater pearl mussel Margaritifera margaritifera is one of the most threatened freshwater bivalves worldwide. In this study, we aimed (i) to study the processes by which water quality might affect freshwater mussels in situ and (ii) to provide insights into the ecotoxicological significance of water pollution to natural populations in order to provide necessary information to enhance conservation strategies. M. margaritifera specimens were sampled in two close sites located upstream or downstream from an illegal dumping site. The renal transcriptome of these animals was assembled and gene transcription determined by RNA-seq. Correlations between transcription levels of each single transcript and the bioaccumulation of nine trace metals, age (estimated by sclerochronology), and condition index were determined in order to identify genes likely to respond to a specific factor. Amongst the studied metals, Cr, Zn, Cd, and Ni were the main factors correlated with transcription levels, with effects on translation, apoptosis, immune response, response to stimulus, and transport pathways.However, the main factor explaining changes in gene transcription appeared to be the age of individuals with a negative correlation with the transcription of retrotransposon-related genes. To investigate this effect further, mussels were classified into three age classes. In young, middle-aged and old animals, transcription levels were mainly explained by Cu, Zn and age, respectively. This suggests differences in the molecular responses of this species to metals during its lifetime that must be better assessed in future ecotoxicology studies.

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Section: Resultsmentioning

confidence: 99%

Transcriptomic responses of the endangered freshwater mussel Margaritifera margaritifera to trace metal contamination in the Dronne River, France

Bertucci

Pierron

Thébault

et al. 2017

Environ Sci Pollut Res

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“…Indeed, a pattern of biological responses similar to the results of the LMS was reported for the oxyradical production. Lysosomal membranes are highly vulnerable to oxidative stress induced by reactive oxygen species throughout a complex pattern of direct and indirect mechanisms (Regoli and Giuliani, 2014). On the other hand, early studies report that benzo(a)pyrene and more in general all polyaromatic hydrocarbons are oxidative stress promoters in marine organisms (Bouraoui et al, 2009(Bouraoui et al, , 2015.…”

Section: Discussionmentioning

confidence: 99%

Comparative Effects of Ingested PVC Micro Particles With and Without Adsorbed Benzo(a)pyrene vs. Spiked Sediments on the Cellular and Sub Cellular Processes of the Benthic Organism Hediste diversicolor

Gomiero

Strafella

Pellini³

et al. 2018

Front. Mar. Sci.

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Plastic micro litter represents an emerging contaminant as well as a multiple stress agent in aquatic environments. Microplastics are found even in the remote areas of the world. Together with their occurrence in all environmental compartments, there is a growing concern about their potential to adsorb pollutants co-occurring in the environment. At present, little is known about this source of exposure for aquatic organisms in the benthic environment. Exposure conditions were set up to mimick the contribution of microplastics through different exposure routes. Potential biological effects resulting from these exposures were investigated in the model organism Hediste diversicolor, an annelid worm. Cellular effects including alterations of immunological responses, lysosomal compartment changes, mitochondrial activity, oxyradical production and onset of genotoxicity were assessed in coelomocytes while temporary and permanent effects of oxidative stress were also performed at tissue level. In this study polyvinylchloride (PVC) microparticles were shown to adsorb benzo(a)pyrene with a time and dose-dependent relationship. The elevated bioavailability of the model pollutant after ingestion induced a clear pattern of biological responses. Toxicity mainly targeted impairment of cellular functioning and genotoxicity in H. diversicolor coelomocytes, while permanent effects of oxidative stress were observed at tissue level. Coelomocytes responded fast and with a higher degree of sensitivity to the adverse stimuli. The results showed that microplastic particles in sediments may play a significant role as vectors for organic pollutants. The highest adverse responses were observed in those H. diversicolor exposed to sediments spiked with PVC particles pre-incubated with B[a]P when compared against sediments spiked with B[a]P and plastic microparticles separately.

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“…The activation of TOR promotes the initiation and elongation phases of translation, while 4E-BP inhibits the translation initiation by binding eIF4E (Teleman et al 2005). Study reported that the transcriptional induction of signaling molecule gene could indicate an increase to its de novo synthesis in fish (Regoli and Giuliani 2014). Thus, the upregulated TOR gene expression and downregulated 4E-BP gene expression towards ETSP might indicate an increasing de novo synthesis of TOR and decreasing de novo synthesis of 4E-BP, respectively, which might be beneficial to the translation initiation.…”

Section: Discussionmentioning

confidence: 99%

Supplementation of enzyme-treated soy protein saves dietary protein and promotes digestive and absorptive ability referring to TOR signaling in juvenile fish

Xiao

Jiang

Feng

et al. 2017

Fish Physiol Biochem

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This study was conducted to evaluate the effect of enzyme-treated soy protein (ETSP) supplementation in the low-protein diet on growth performance, digestive and absorptive capacities, and related signaling molecules' gene expressions in juvenile Jian carp. The results showed that percent weight gain (PWG), specific growth rate (SGR), and feed intake (FI) were decreased by reducing dietary protein from 34 to 32% (P < 0.05). Supplying low-protein diet with optimal ETSP increased previously mentioned indices of juvenile Jian carp (P < 0.05), which also had no significant difference with the high-protein diet (34%CP) (P > 0.05). Compared with the low-protein diet, appropriate ETSP supplementation in the low-protein diet increased (P < 0.05) (1) the trypsin, lipase, and amylase activities in the hepatopancreas; (2) cholecystokinin concentration in the proximal intestine; (3) the γ-glutamyl transpeptidase (γ-GT), alkaline phosphatase (AKP), and Na + /K + -ATPase activities in all intestinal segments; and (4) the messenger RNA (mRNA) levels of trypsin, lipase, and amylase in hepatopancreas and γ-GT in the mid (MI) and distal (DI) intestine, alkaline phosphatase in MI, and Na + /K + -ATPase and target of rapamycin in all intestinal segments. At the same time, appropriate ETSP supplementation in the low-protein diet downregulated the mRNA levels of AKP in the DI and eIF4E-binding protein 2 in all intestinal segments (P < 0.05). In conclusion, adding 10 g ETSP/kg diet in the low-protein diet can restore the growth performance and digestive and absorptive abilities to the levels in group with 34% dietary protein. Supplementation of optimal ETSP in the low-protein diet enhanced the digestive and absorptive abilities and regulated the signaling molecules related to the TOR signaling pathway.

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Oxidative pathways of chemical toxicity and oxidative stress biomarkers in marine organisms

Cited by 731 publications

References 104 publications

Transcriptomic responses of the endangered freshwater mussel Margaritifera margaritifera to trace metal contamination in the Dronne River, France

Transcriptomic responses of the endangered freshwater mussel Margaritifera margaritifera to trace metal contamination in the Dronne River, France

Comparative Effects of Ingested PVC Micro Particles With and Without Adsorbed Benzo(a)pyrene vs. Spiked Sediments on the Cellular and Sub Cellular Processes of the Benthic Organism Hediste diversicolor

Supplementation of enzyme-treated soy protein saves dietary protein and promotes digestive and absorptive ability referring to TOR signaling in juvenile fish

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