Influence of gender and season on reduced glutathione concentration and energy reserves of Gammarus roeseli

Gismondi, Éric; Beisel, Jean‐Nicolas; Cossu-Leguille, Carole

doi:10.1016/j.envres.2012.06.004

Cited by 47 publications

(23 citation statements)

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“…However, our results go further, since we have demonstrated a higher PBDE accumulation in females compared to males. This observation could be explained by the fact that PBDEs are highly lipophilic compounds (K ow ranges from 6.5 to 10; European Union (EU), 2001) and that Gammarid females have higher lipids content than males (Gismondi et al, 2012b). This hypothesis is supported by Viganò et al (2009) who have shown that the accumulation of lower PBDEs is directly related to the lipid content of invertebrates.…”

Section: Pbdes Toxicity and Gammarid Gendersupporting

confidence: 69%

Effects of two PBDE congeners on the moulting enzymes of the freshwater amphipod Gammarus pulex

Gismondi

Thomé

2014

Environmental Pollution

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a b s t r a c tPolybrominated diphenyl ethers (PBDEs) are abundant in aquatic environment. However, only few studies have investigated their impacts on freshwater invertebrates. This work aimed to study the effects of BDE-47 and BDE-99 congeners on the chitobiase and chitinolytic enzymes activities of the freshwater amphipod Gammarus pulex, according to gender, PBDE concentration and time of exposure. In addition, the bioaccumulation of BDE-47 and BDE-99 were measured. Results revealed that females have bioaccumulated more PBDE than males, and BDE-99 was more accumulated than BDE-47. PBDE exposures for 96 h have caused chitobiase and chitinolytic enzymes inhibition. This study not only indicate the importance of taking into account various confounding factors (gender, congeners, concentration) to understand PBDE effects, but underline also disruptions of molting enzymes activities. These disturbances suggest effects on the gammarid development and reproduction, and consequently effects on the gammarid population, and on a larger scale, a dysfunction of the ecosystem.

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Section: Pbdes Toxicity and Gammarid Gendersupporting

confidence: 69%

Effects of two PBDE congeners on the moulting enzymes of the freshwater amphipod Gammarus pulex

Gismondi

Thomé

2014

Environmental Pollution

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“…More efficient detoxification in females was already highlighted in previous studies which have demonstrated higher antitoxic defense (e.g. antitoxic enzymes, antioxidant compounds) in females than males (Sroda and Cossu-Leguille 2011;Gismondi et al 2012;Gismondi et al 2013). Energy reserves in amphipod (e.g.…”

Section: Discussionmentioning

confidence: 81%

“…lipid content) might be one of the contributing factor for the observed gender-biased differences in MXR activity. Indeed, it is well known that females contain higher energy reserves than males (Gismondi et al 2012), probably to ensure reproduction processes (i.e. oogenesis more costly than spermatogenesis).…”

Section: Discussionmentioning

confidence: 99%

“…In addition, many ecotoxicological studies have been conducted with gammarids as model to evaluate pollutants impacts (Leroy et al 2010;Gismondi et al 2013;Gismondi and Thomé 2014;Lebrun et al 2014), and some antitoxic defences have been developed in Gammarus sp. as biomarkers (Geffard et al 2007;Lacaze et al 2011;Sroda and Cossu-Leguille 2011;Gismondi et al 2012). However, to our knowledge, no study has been devoted to investigate PBDEs effects in Gammarus sp.…”

Section: Introductionmentioning

confidence: 99%

“…Sample homogenates were prepared as described in Gismondi et al (2012). Total GPx activity assessment was adapted from Correia et al (2003) using cumene hydroperoxide (CuOOH 18 mM) as substrate.…”

Section: Experiments 2: Gst and Gpx Activitiesmentioning

confidence: 99%

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Changes in antitoxic defense systems of the freshwater amphipod Gammarus pulex exposed to BDE-47 and BDE-99

2015

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Polybrominated diphenyl ethers (PBDEs) are emerging pollutants widely distributed in aquatic environment. Although the bioaccumulation of this compound has been well studied, few studies have investigated their impacts on antitoxic systems of invertebrates, considering both genders. Here, we have evaluated the effects of BDE-47 and BDE-99 congeners on the antitoxic defence systems of the freshwater amphipod Gammarus pulex, and especially on the multixenobiotic resistance (MXR) activity, as well as the activities of two antitoxic enzymes, the glutathione-S-transferase (GST) and the glutathione peroxidases (GPx). Results revealed that BDE-47 and BDE-99 have inhibited the MXR activity whatever the gammarid gender, which could lead to a reduction of the pollutant elimination from the organism. In addition, a gender-biased response and a congener-biased effect on the antitoxic enzymes activities were observed. Indeed, both BDE congener exposures increased the GST activity in males, whereas in females, only BDE-99 congener modified this activity by decreasing it. On the contrary, BDE exposures did not impact the GPx activity in females, while in males BDE-99 has increased it. Results of the present study highlight that a PBDE exposure at 0.1 lg L -1 modify antitoxic enzymes activities differently according to gender, which could lead to a change in G. pulex sensitivity on the long term. Finally, this work confirms the ecotoxicological implication of gender in the pollutant toxicity assessment, in order to evaluate impact on populations.

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Effects of the boscalid fungicide Filan® on the marine amphipod Allorchestes compressa at environmentally relevant concentrations

Keough

Long

et al. 2016

Enviro Toxic and Chemistry

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Fungicides are widely used in agriculture to control fungal diseases. After application, fungicides can be transported offsite to surface and groundwater and ultimately enter estuarine and marine environments. The presence of fungicides in the marine environment may pose risks to marine organisms, but little is known about fungicide effects on these organisms, especially invertebrates. The present study investigated the effects of the commonly used boscalid fungicide Filan® on life history traits, feeding rate, and energy reserves (lipid, glycogen, and protein content) of the marine amphipod Allorchestes compressa over 6 wk under laboratory conditions. Amphipods were exposed to 3 concentrations of Filan (1 μg, 10 μg, and 40 μg active ingredient [a.i.]/L), with 5 replicates per treatment. Lipid content and reproduction were the most sensitive measures of effect, with lipid content reduced by 53.8% at the highest concentration. Survival, growth, and other energy reserves of amphipods were also negatively affected by Filan, and the effects were concentration dependent. Antennal deformities were incidentally observed on the amphipods at a concentration of 40 μg a.i./L. The results of the present study indicate comprehensive effects of the boscalid fungicide Filan on A. compressa at environmentally relevant concentrations. The decline or absence of A. compressa in marine ecosystems could impair the ecosystem function because of their important role in trophic transfer and nutrient recycling. The authors' results suggest that even though the use of fungicides is often regarded as posing only a minor risk to aquatic organisms, the assessment of their long-term effects is critical.

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Influence of gender and season on reduced glutathione concentration and energy reserves of Gammarus roeseli

Cited by 47 publications

References 46 publications

Effects of two PBDE congeners on the moulting enzymes of the freshwater amphipod Gammarus pulex

Effects of two PBDE congeners on the moulting enzymes of the freshwater amphipod Gammarus pulex

Changes in antitoxic defense systems of the freshwater amphipod Gammarus pulex exposed to BDE-47 and BDE-99

Effects of the boscalid fungicide Filan® on the marine amphipod Allorchestes compressa at environmentally relevant concentrations

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