Antioxidant response of<i>Daphnia magna</i>exposed to no. 20 diesel oil

Zhang, J. F.; Sun, Yunfei; Shen, Hua; Liu, H.; Wang, X. R.; Wu, Jiang; Xue, Yingang

doi:10.3184/095422904782775027

Cited by 9 publications

(3 citation statements)

References 26 publications

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“…In their study, the phytoplankton contained nodularin, toxins causing paralytic shellfish poisoning and diarrhetic shellfish poisoning, and ichthyotoxins with haemolytic activity instead of MC. GST did not seem to be involved in detoxification of those toxins in copepods.In D. magna, the activity of CAT has been linked positively with the formation of ROS originated by acute changes in temperature and oxygen availability (Becker et al, 2011), and from the presence of contaminants or stressors causing oxidative stress, such as UV (Vega and Pizarro, 2000;Kim et al, 2010), diesel oil (Zhang et al, 2004) and nanoparticles (Kim et al, 2010). In the present study, the increase in CAT activity was directly related to MC-LR …”

supporting

confidence: 55%

“…In D. magna, the activity of CAT has been linked positively with the formation of ROS originated by acute changes in temperature and oxygen availability (Becker et al, 2011), and from the presence of contaminants or stressors causing oxidative stress, such as UV (Vega and Pizarro, 2000;Kim et al, 2010), diesel oil (Zhang et al, 2004) and nanoparticles (Kim et al, 2010). In the present study, the increase in CAT activity was directly related to MC-LR concentration (when the mothers were not exposed, Fig.3), confirming results from previous studies, as MCs belong to oxidative-stress-generating compounds (Amado and Montserrat, 2010;Ortiz-Rodríguez and Wiegand, 2010).…”

Section: Discussionmentioning

confidence: 99%

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Transgenerational effects of microcystin-LR onDaphnia magna

Ortiz-Rodríguez

Dao

Wiegand

2012

Journal of Experimental Biology

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SUMMARYAnthropogenic and climate factors increase the frequency of problematic cyanobacterial blooms in freshwater. Among other toxins, some cyanobacteria produce microcystins (MCs), which inhibit phosphatases type 1 and type 2A and provokes oxidative stress. Toxic cyanobacteria affect the growth, survival and reproduction of zooplankton, particularly those from the genus Daphnia, which have a central position in pelagic food webs. However, one possibility to ameliorate effects is to biotransform MC via glutathione S transferase (GST) to a less toxic glutathione conjugate. This process was hypothesised to underlie the ability of Daphnia to withstand MC and to explain the enhanced tolerance of the offspring from mothers exposed to toxic cyanobacteria. Thus we conducted multigenerational experiments with D. magna, exposing the parental generation to MC for 1 or 7days and determining the enzyme-mediated tolerance to MC in their offspring by assessing the acute effect of MC on biotransformation and antioxidant and metabolism enzymes, and through 21day chronic tests on toxicity and growth. Seven days of exposure of the parental generation to MC induced higher activity of GST and malate dehydrogenase in the offspring and enabled them to increment the catalase activity when challenged with MC, whereas 1day of exposure of the parental generation did not. Offspring from non-exposed and 1-day-exposed mothers suffered decreased survival when exposed to MC compared with offspring from 7-day-exposed mothers; survival was correlated with the elevated activity of GST, malate dehydrogenase and catalase, suggesting maternal transfer of activation factors. However, increased survival occurred at the expense of individual growth. These results suggest that transgenerational effects are provoked by MC in D. magna, which may explain the observed acquirement of enhanced tolerance over generations.Key words: microcystin, cyanobacterial toxin, transgenerational effect, Daphnia, zooplankton. THE JOURNAL OF EXPERIMENTAL BIOLOGY 2796 cyanobacteria on Daphnia are reflected by, for example, reduced growth, survival and reproduction (Lampert, 1981; Demott et al., 1991;Hietala et al., 1995;Nogueira et al., 2004;Trubetskova and Haney, 2006; Dao et al., 2010). However, one possible way to reduce toxic effects is to biotransform the toxin MC-LR by conjugation to the tripeptide glutathione (GSH) via the enzyme glutathione S transferase (GST) (Pflugmacher et al., 1998). MCs are conjugated to GSH through the terminal methylene of N-methyldehydroalanine (Kondo, 1992), which is the moiety that binds to the active center of protein phosphatases (MacKintosh, 1995). The resulting conjugate is less toxic (Metcalf et al., 2000) and more hydrophilic, for easier transportation or excretion (Pflugmacher et al., 2001). This MC-LR detoxification process has been described in several aquatic organisms ranging from plants to invertebrates (including Daphnia magna) to fish (Pflugmacher et al., 1998;Wiegand and Pflugmacher, 2005). Three major families of prote...

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supporting

confidence: 55%

Section: Discussionmentioning

confidence: 99%

Transgenerational effects of microcystin-LR onDaphnia magna

Ortiz-Rodríguez

Dao

Wiegand

2012

Journal of Experimental Biology

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“…naturally derived antioxidant formulations, including Multi-Antioxidant Tablet (21 Century Healthcare Inc), denoted as antioxidant A here, which was a proprietary combination of antioxidant-enhanced herbs and plants such as Acai berry extract [7], Golgi Berry [8], Noni [9], Mangosteen [10] and Pomegranate [11], all superfoods claiming to have antioxidative capabilities. And Yu Xing Cao Solution (Honolulu, HI) was included in our study for its restoration power, which Chinese medicine claims to be an Antioxidant.…”

Section: Variousmentioning

confidence: 99%

Investigating the Acute Cardiac Restoration for Rescuing Daphnia Magna Stressed from Environmental Disturbances Using Antioxidants

Luo

2023

JOGEE

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Freshwater ecosystems face a significant challenge with the pervasive oxidative stress induced by pollution with global warming and ozone layer depletion. Amidst this concern, various companies assert their products' antioxidant properties to restore them to normal. Elevated oxygen species, identified as a pivotal contributor to heightened cardiac functionality, particularly impact crucial organisms such as Daphnia Magna within aquatic environments. This study proposes a proactive approach to mitigate oxidative stress by introducing antioxidants into water, aiming to offer insights into fortifying the health and resilience of aquatic ecosystems confronting oxidant escalation. The primary. Objective: of this research was to assess the impact of commercially available "antioxidants" on the heart rates of Daphnia Magna during the recovery phase from oxidative stress. As. Methods: the investigation unfolds in two phases: an initial toleration study to gauge Daphnia reactions to selected chemicals, followed by a recovery study where Daphnia was exposed to the oxidizing agent H2O2 for 30 minutes and subsequently immersed in antioxidant solutions as well as in culturing water for a comparison purpose. The central methodology revolves around comparing the heart rates of Daphnia exposed to H2O2 and analyzing their recovery in different solutions. Heart rate serves as a chosen metric due to its reliability as an indicator of stress and its non-invasive measurement, ensuring minimal harm to the organisms. A newly defined parameter, relative restoration power (RRP) as mean heartbeat %change, was estimated and compared. Our Conclusions: revealed that certain antioxidants exhibit a modest yet noteworthy impact on enhancing the recovery of Daphnia magna. Consequently, the study concludes that improving antioxidant uptake or finding less intrusive delivery methods may be viable strategies to mitigate oxidative stress in Daphnia magna.

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Phyto-mediated synthesis of magnesium doped iron oxide nanoparticles and its eco-friendly application towards agriculture and environmental remediation

Kumar,

Kumar

2024

emergent mater.

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Antioxidant response ofDaphnia magnaexposed to no. 20 diesel oil

Cited by 9 publications

References 26 publications

Transgenerational effects of microcystin-LR onDaphnia magna

Transgenerational effects of microcystin-LR onDaphnia magna

Investigating the Acute Cardiac Restoration for Rescuing Daphnia Magna Stressed from Environmental Disturbances Using Antioxidants

Phyto-mediated synthesis of magnesium doped iron oxide nanoparticles and its eco-friendly application towards agriculture and environmental remediation

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