scholarly journals Effect of short-term exposure to fluorescent red polymer microspheres on Artemia franciscana nauplii and juveniles

Author(s):  
Diogo Peixoto ◽  
Amparo Torreblanca ◽  
Susana Pereira ◽  
Maria Natividade Vieira ◽  
Inmaculada Varó

AbstractMicroplastics (MPs) are ubiquitously present in the world’s seas with unknown potential toxic effects on aquatic ecosystems. The aim of this study was to evaluate biochemical responses caused by 1–5 μm diameter plastic fluorescent red polymer microspheres (FRM), under short-term exposure of nauplii and juveniles of Artemia franciscana, using a set of biomarkers involved in important physiological processes such as biotransformation, neuronal transmission and oxidative stress. Two FRM concentrations (0.4 and 1.6 mg mL−1) present in the water at ecologically relevant concentrations were used to study their toxicity. No significant differences were found in growth, survival and feeding behaviour of nauplii, after 2 days of exposure to both FRM concentrations. However, in juveniles, survival decreased after 5 days of exposure to FRM1.6; but no significant differences were found in either growth or feeding behaviour. It was observed that nauplii and juveniles, under short-term exposure, had the ability to ingest and egest FRM particles, although their accumulation was higher in nauplii than in juveniles, maybe related with the capacity of the latter to empty their gut content faster, in the presence of food. Regarding biomarkers responses in nauplii, all enzymatic activities increased significantly, after short-term exposure to the higher FRM concentration tested (FRM1.6), which could be related with detoxifying MPs-triggered oxidative stress. In juveniles, the inhibition of ChE and the decrease in the activity of antioxidant enzymes, after 5 days of exposure to FRM1.6, might indicate a neurotoxic effect and oxidative damage induced by FRM. This study provides further evidences that accumulation of MPs in the gut by nauplii and juveniles of A. franciscana can induce negative effects on important physiological processes with influence on their health, highlighting the general concern about the negative effects of MPs pollution on aquatic species, as well as the need to understand the mechanism of MPs toxicity and its possible impacts on environmental safety.

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Michał Dobrakowski ◽  
Marta Boroń ◽  
Ewa Birkner ◽  
Aleksandra Kasperczyk ◽  
Ewa Chwalińska ◽  
...  

The present study was designed to explore the possible influence of subacute exposure to lead on the levels of selected essential metals, selected proteins related to them, and oxidative stress parameters in occupationally exposed workers. The study population included 36 males occupationally exposed to lead for 36 to 44 days. Their blood lead level at the beginning of the study was 10.7 ± 7.67 μg/dl and increased to the level of 49.1 ± 14.1 μg/dl at the end of the study. The levels of calcium, magnesium, and zinc increased significantly after lead exposure compared to baseline by 3%, 3%, and 8%, respectively, while the level of copper decreased significantly by 7%. The malondialdehyde (MDA) level and the activities of catalase (CAT) and superoxide dismutase (SOD) did not change due to lead exposure. However, the level of lipid hydroperoxides (LPH) in serum increased significantly by 46%, while the level of erythrocyte lipofuscin (LPS) decreased by 13%. The serum levels of essential metals are modified by a short-term exposure to lead in occupationally exposed workers. A short-term exposure to lead induces oxidative stress associated with elevated levels of LPH but not MDA.


2014 ◽  
Vol 107 ◽  
pp. 22-29 ◽  
Author(s):  
Rayenne Saria ◽  
Florence Mouchet ◽  
Annie Perrault ◽  
Emmanuel Flahaut ◽  
Christophe Laplanche ◽  
...  

2017 ◽  
Vol 25 (23) ◽  
pp. 22408-22419 ◽  
Author(s):  
Jie Yang ◽  
Tingting Huo ◽  
Xu Zhang ◽  
Jie Ma ◽  
Yulin Wang ◽  
...  

2019 ◽  
Vol 6 (10) ◽  
pp. 3072-3079 ◽  
Author(s):  
Li-Juan Feng ◽  
Jian-Wei Li ◽  
Elvis Genbo Xu ◽  
Xiao-Dong Sun ◽  
Fan-Ping Zhu ◽  
...  

PS-NH2 exposure causes disruption of glutathione metabolism and damage to the membrane hydrophobic core of S. elongatus. This enhanced the understanding of the ecological risks of plastic debris to freshwater environments.


2015 ◽  
Vol 35 (2) ◽  
pp. 829-840 ◽  
Author(s):  
Abderrahim Nemmar ◽  
Priya Yuvaraju ◽  
Sumaya Beegam ◽  
Badreldin H Ali

Background/Aim: Water-pipe smoking (WPS) has acquired worldwide popularity, and is disseminating particularly rapidly in Europe and North America. However, little is known about the short-term cardiovascular effects of WPS. Methods: Presently, we assessed the short-term cardiovascular effects of nose-only exposure to mainstream WPS in BALB/c mice for 30 min/day for 5 consecutive days. Control mice were exposed to air. At the end of the exposure period, several cardiovascular endpoints were measured. Results: WPS did not affect the number of leukocytes and the plasma concentrations of C-reactive protein, tumor necrosis factor α (TNFα) and interleukin-6 (IL-6). Likewise, plasma levels of lipid peroxidation (LPO), reduced glutathione (GSH) and catalase were not affected by WPS. By contrast, WPS aggravated in vivo thrombosis by shortening the thrombotic occlusion time in pial arterioles and venules. The number of circulating platelets was reduced by WPS suggesting the occurrence of platelet aggregation in vivo. Elevated concentrations of fibrinogen and plasminogen activator inhibitor-1 were seen after the exposure to WPS. Blood samples taken from mice exposed to WPS and exposed to adenosine diphosphate showed more platelet aggregation. The heart concentrations of IL-6 and TNFα were augmented by WPS. Likewise, heart levels of LPO, reactive oxygen species and the antioxidants catalase and GSH were increased by WPS. However, the systolic blood pressure and heart rate were not affected by WPS. Conclusion: It can be concluded that short-term exposure to WPS exerts procoagulatory effects and induce cardiac inflammation and oxidative stress. At the time point investigated, there was no evidence for blood inflammation or oxidative stress.


2007 ◽  
Vol 48 (8) ◽  
pp. 658-665 ◽  
Author(s):  
Tetyana V. Bagnyukova ◽  
Lidia I. Luzhna ◽  
Igor P. Pogribny ◽  
Volodymyr I. Lushchak

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