scholarly journals Assessment of water pollution in the Brazilian Pampa biome by means of stress biomarkers in tadpoles of the leaf frog Phyllomedusa iheringii (Anura: Hylidae)

2015 ◽  
Author(s):  
Tiago G Santos ◽  
Roberto Melo ◽  
Dennis Costa e Silva ◽  
Mauro Nunes ◽  
Jeferson Franco, JL Franco
Keyword(s):  
Reference Site ◽  
Acetylcholinesterase Activity ◽  
Glutathione S Transferase ◽  
Stress Biomarkers ◽  
Aquatic Contamination ◽  
Pampa Biome ◽  
Measured Stress ◽  
Agricultural Areas ◽  
Increased Activity ◽  
Harmful Effects

The Brazilian Pampa biome is currently under constant threat due to increase of agriculture and improper management of urban effluents. Studies with focus on the assessment of impacts caused by human activities in this biome are scarce. In the present study we measured stress-related biomarkers in the muscle tissue of tadpoles of the leaf frog Phyllomedusa iheringii as a tool for the assessment of potential aquatic contamination in selected ponds (S1 and S2) nearby agricultural areas in comparison to a reference site. A significant decrease in acetylcholinesterase activity was observed in S2 when compared to S1 and reference. The levels of total-hydroperoxides were increased in S2 site. In parallel, increased activity of the antioxidant enzymes catalase, superoxide dismutase and glutathione S-transferase were observed in S2 when compared to S1 and reference. Based on the results, we drawn attention to the harmful effects caused by indiscriminate use of pesticides on the Pampa biome borders. Our study also validates Phyllomedusa iheringii as a valuable organism for field-based ecotoxicological studies. M

scholarly journals Assessment of water pollution in the Brazilian Pampa biome by means of stress biomarkers in tadpoles of the leaf frog Phyllomedusa iheringii (Anura: Hylidae)

2016 ◽  
Author(s):  
Tiago G Santos ◽  
Roberto Melo ◽  
Dennis Costa e Silva ◽  
Mauro Nunes ◽  
Jeferson Franco, JL Franco
Keyword(s):  
Acetylcholinesterase Activity ◽  
Glutathione S Transferase ◽  
Amphibian Species ◽  
Mechanisms Of Toxicity ◽  
Stress Biomarkers ◽  
Aquatic Contamination ◽  
Pampa Biome ◽  
Measured Stress ◽  
Agricultural Areas ◽  
Increased Activity

The Brazilian Pampa biome is currently under constant threat due to increase of agriculture and improper management of urban effluents. Studies with focus on the assessment of impacts caused by human activities in this biome are scarce. In the present study we measured stress-related biomarkers in tadpoles of the leaf frog Phyllomedusa iheringii, an endemic species to the Pampa biome, and tested its suitability as a bioindicator for the assessment of potential aquatic contamination in selected ponds (S1 and S2) nearby agricultural areas in comparison to a reference site. A significant decrease in acetylcholinesterase activity was observed in S2 when compared to S1 and reference. The levels of total-hydroperoxides were increased in S2 site. In parallel, increased activity of the antioxidant enzymes catalase, superoxide dismutase and glutathione S-transferase were observed in S2 when compared to S1 and reference. Further studies are necessary in order to correlate the changes observed here with different chemical stressors in water, as well as to elucidate mechanisms of toxicity induced by pesticides in amphibian species endemic to the Pampa biome. Nevertheless, our study validates Phyllomedusa iheringii as a valuable bioindicator in environmental studies.

scholarly journals Assessment of water pollution in the Brazilian Pampa biome by means of stress biomarkers in tadpoles of the leaf frog Phyllomedusa iheringii (Anura: Hylidae)

2016 ◽  
Author(s):  
Tiago G Santos ◽  
Roberto Melo ◽  
Dennis Costa e Silva ◽  
Mauro Nunes ◽  
Jeferson Franco, JL Franco
Keyword(s):  
Acetylcholinesterase Activity ◽  
Glutathione S Transferase ◽  
Amphibian Species ◽  
Mechanisms Of Toxicity ◽  
Stress Biomarkers ◽  
Aquatic Contamination ◽  
Pampa Biome ◽  
Measured Stress ◽  
Agricultural Areas ◽  
Increased Activity

The Brazilian Pampa biome is currently under constant threat due to increase of agriculture and improper management of urban effluents. Studies with focus on the assessment of impacts caused by human activities in this biome are scarce. In the present study we measured stress-related biomarkers in tadpoles of the leaf frog Phyllomedusa iheringii, an endemic species to the Pampa biome, and tested its suitability as a bioindicator for the assessment of potential aquatic contamination in selected ponds (S1 and S2) nearby agricultural areas in comparison to a reference site. A significant decrease in acetylcholinesterase activity was observed in S2 when compared to S1 and reference. The levels of total-hydroperoxides were increased in S2 site. In parallel, increased activity of the antioxidant enzymes catalase, superoxide dismutase and glutathione S-transferase were observed in S2 when compared to S1 and reference. Further studies are necessary in order to correlate the changes observed here with different chemical stressors in water, as well as to elucidate mechanisms of toxicity induced by pesticides in amphibian species endemic to the Pampa biome. Nevertheless, our study validates Phyllomedusa iheringii as a valuable bioindicator in environmental studies.

scholarly journals Sciades herzbergii oxidative stress biomarkers: an in situ study of an estuarine ecosystem (São Marcos' Bay, Maranhão, Brazil)

2010 ◽  
Vol 58 (spe4) ◽  
pp. 11-17 ◽  
Author(s):  
Raimunda Nonata Fortes Carvalho-Neta ◽  
Ana Lúcia Abreu-Silva
Keyword(s):  
Reference Site ◽  
Gonadosomatic Index ◽  
Contaminated Site ◽  
Glutathione S Transferase ◽  
Oxidative Stress Biomarkers ◽  
Estuarine Ecosystem ◽  
Biometric Data ◽  
Aquatic Contamination ◽  
Significant Difference

In order to study the effects of environmental contamination on wild fish, sites were sampled in São Marcos' Bay. The first is located near the ALUMAR/ALCOA port, a potentially contaminated area. The second, located near the Coqueiro beach, was used as a reference area. The activity of antioxidant defence catalase (CAT) and glutathione S-transferase (GST) in S. herzbergii was compared with the biometric data and gonadosomatic index (GSI). The result showed that GSI decreased significantly in females (p<0.05) at the contaminated site. The activity of CAT was higher in fish caught at the contaminated site. A significant difference was observed in GST activity in the liver of S. herzbergii in the comparison between fish from the contaminated site and those from the reference site (p<0.05). GSI provides new insights into the nature of the detoxification response in this catfish species because it is not correlated with the enzymes at the potentially contaminated site. We are, therefore, in a position to suggest that the elevated GST/CAT activity might well be related to the reproduction of the animals at the reference site but not at the potentially contaminated site. If that be the case, one may conclude that GST/CAT and GSI are useful biomarkers of aquatic contamination.

scholarly journals Assessment of Water Pollution Signs in the Brazilian Pampa Biome Using Stress Biomarkers in Fish (Astyanax sp.)

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Mauro Nunes ◽  
Fabio Wacker da Silva ◽  
Dennis Costa-Silva ◽  
Gabriel Luz Wallau ◽  
Thais Posser ◽  
...  
Keyword(s):  
Water Pollution ◽  
Water Contamination ◽  
Acetylcholinesterase Activity ◽  
Fish Muscle ◽  
Aquatic Biota ◽  
Stress Biomarkers ◽  
Muscle Tissues ◽  
Chronic Poisoning ◽  
Pampa Biome ◽  
Santa Maria

Located in southern Brazil, the Pampa biome has been under constant threat due to improper management of human effluents and use of pesticides. These contaminants accumulate mainly in water resources resulting in chronic poisoning of aquatic biota. Up to date, no studies on the assessment of environmental quality in the Brazilian portion of Pampa biome have been undertaken. Thereby, our main goal in this study was to investigate the ecotoxicological risks caused by human activity in the Santa Maria River, a major water course in the Brazilian Pampa biome. Brain and muscle tissues were used for determining oxidative stress and cholinesterase biomarkers in fish (Astyanax sp.) exposed to urban and agricultural effluents. A substantial decrease in fish muscle acetylcholinesterase activity was observed in exposed animals, compared to controls (kept under laboratory conditions). In parallel, increased lipid peroxidation and significant changes in stress-responsive antioxidant enzymes (GST, CAT, GPx, and TrxR) were detected. In the fish brain, a significant increase in GST activity is reported. In conclusion, our results showed significant changes in biomarkers of water contamination in Astyanax captured in Santa Maria River, pointing to important levels of water pollution in the region and validating the use of Astyanax in biomonitoring programs within the Pampa biome borders.

scholarly journals A Comparative Assessment of the Chronic Effects of Micro- and Nano-Plastics on the Physiology of the Mediterranean Mussel Mytilus galloprovincialis

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 649
Author(s):  
Marco Capolupo ◽  
Paola Valbonesi ◽  
Elena Fabbri
Keyword(s):  
Mytilus Galloprovincialis ◽  
Acetylcholinesterase Activity ◽  
Particle Sizes ◽  
Glutathione S Transferase ◽  
Phase Ii Metabolism ◽  
Chronic Effects ◽  
Mediterranean Mussel ◽  
Metabolism Enzyme ◽  
The Mediterranean

The ocean contamination caused by micro- and nano-sized plastics is a matter of increasing concern regarding their potential effects on marine organisms. This study compared the effects of a 21-day exposure to 1.5, 15, and 150 ng/L of polystyrene microplastics (PS-MP, 3-µm) and nanoplastics (PS-NP, 50-nm) on a suite of biomarkers measured in the Mediterranean mussel Mytilus galloprovincialis. Endpoints encompassed immunological/lysosomal responses, oxidative stress/detoxification parameters, and neurotoxicological markers. Compared to PS-MP, PS-NP induced higher effects on lysosomal parameters of general stress. Exposures to both particle sizes increased lipid peroxidation and catalase activity in gills; PS-NP elicited greater effects on the phase-II metabolism enzyme glutathione S-transferase and on lysozyme activity, while only PS-MP inhibited the hemocyte phagocytosis, suggesting a major role of PS particle size in modulating immunological/detoxification pathways. A decreased acetylcholinesterase activity was induced by PS-NP, indicating their potential to impair neurological functions in mussels. Biomarker data integration in the Mussel Expert System identified an overall greater health status alteration in mussels exposed to PS-NP compared to PS-MP. This study shows that increasing concentrations of nanoplastics may induce higher effects than microplastics on the mussel’s lysosomal, metabolic, and neurological functions, eventually resulting in a greater impact on their overall fitness.

scholarly journals Seasonal changes in oxidative stress biomarkers of the snail Viviparus acerosus from the Velika Morava River, Serbia

2012 ◽  
Vol 64 (3) ◽  
pp. 953-962 ◽  
Author(s):  
Svetlana Despotovic ◽  
Branka Perendija ◽  
Jelena Gavric ◽  
Slavica Borkovic-Mitic ◽  
M.M. Paunovic ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Phase Ii ◽  
Seasonal Changes ◽  
Important Variable ◽  
Whole Body ◽  
Glutathione S Transferase ◽  
Total Glutathione ◽  
Oxidative Stress Biomarkers ◽  
Stress Biomarkers ◽  
Morava River

The river snail (Viviparus acerosus) from the Velika Morava River, Serbia was chosen in our study in order to determine seasonal changes in oxidative stress biomarkers between July (summer) and September (autumn). The activities of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-Px), glutathione reductase (GR) and the phase II biotransformation enzyme glutathione-S-transferase (GST), as well as the concentration of total glutathione (GSH), were examined in the whole body of the river snails. The obtained results show significantly higher activities of CAT, GSH-Px, GR and biotransformation phase II enzyme GST in September compared to July, while the GSH concentration was lower. There was no general trend in the seasonal changes in the activity of SOD. The presented data show that animals in their natural environment are exposed to constant fluctuations of environmental conditions that could cause antioxidants to exhibit seasonal variations. This fact should be considered as an important variable in the interpretation of results in biomonitoring studies.

scholarly journals Acaricidal activity of Foeniculum vulgare against Rhipicephalus annulatus is mainly dependent on its constituent from trans-anethone

PLoS ONE ◽  
2021 ◽  
Vol 16 (12) ◽  
pp. e0260172
Author(s):  
Shawky M. Aboelhadid ◽  
Waleed M. Arafa ◽  
Abdel-Azeem S. Abdel-Baki ◽  
Atalay Sokmen ◽  
Saleh Al-Quraishy ◽  
...  
Keyword(s):  
Acetylcholinesterase Activity ◽  
Adult Tick ◽  
Economic Losses ◽  
Transferase Activity ◽  
Glutathione S Transferase ◽  
Foeniculum Vulgare ◽  
Predominant Component ◽  
Immunological Reactions ◽  
Main Components ◽  
Fennel Oil

Globally, the economic losses due to hard ticks infestation and the control of the associated diseases have been calculated at USD $13.9–18.7 billion per year. The economic impact is related to its direct damage to the skins, blood loss, anemia, severe immunological reactions and indirect losses that related to the effects of hemoparasites, cost of treatment for clinical cases and expenses incurred in the control of ticks. The current study evaluated the acaricidal activities of fennel Foeniculum vulgare essential oil and its main components; trans-anethole and fenchone; against R. annulatus. GC–MS analysis revealed that this oil contained 16 components representing 99.9% of the total identified compounds with E-anethole being the predominant component(64.29%), followed by fenchone (9.94%). The fennel oil and trans-anethole showed significant acaricidal activities. The LC50 of the fennel oil was attained at concentrations of 12.96% for adult ticks and 1.75% for tick larvae meanwhile the LC50 of trans-anethole was reached at concentrations of 2.36% for adult tick and 0.56% for tick larvae. On the contrary, fenchone showed no any significant adulticidal activities and its LC50 attained at a concentration of 9.11% for tick larvae. Regarding repellence activities, trans-anethole achieved 100% repellency at the concentration of 10% while fennel showed 86% repellency at the same concentration. Fenchone showed no repellency effect. Treatment of larvae with fennel, trans-anethole, and fenchone LC50 concentrations significantly inhibited the acetylcholinesterase activity. Meanwhile, glutathione s-transferase activity was significantly decreased in fennel treated larvae but no significant effect was found in the larvae of trans-anethole and fenchone groups. These results indicate that the acaricide effect of fennel oil may attributed to its high content of trans-anethole. This was supported by potent adulticidal, larvicidal, and repellency effects of trans-anethole against Rhipeciphalus annulatus tick and therefore it could be included in the list of acaricide of plant origin.

scholarly journals Performance of Broilers Fed with Maize Colonized by Either Toxigenic or Atoxigenic Strains of Aspergillus flavus with and without an Aflatoxin-Sequestering Agent

Toxins ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 565
Author(s):  
M. O. Samuel Aikore ◽  
Alejandro Ortega-Beltran ◽  
Daisy Eruvbetine ◽  
Joseph Atehnkeng ◽  
Titilayo D. O. Falade ◽  
...  
Keyword(s):  
Public Good ◽  
Aspergillus Flavus ◽  
Animal Health ◽  
Broiler Performance ◽  
Practical Solution ◽  
Poultry Products ◽  
High Prevalence ◽  
Agricultural Areas ◽  
The Impact ◽  
Harmful Effects

In warm agricultural areas across the globe, maize, groundnut, and other crops become frequently contaminated with aflatoxins produced primarily by the fungus Aspergillus flavus. Crop contamination with those highly toxic and carcinogenic compounds impacts both human and animal health, as well as the income of farmers and trade. In Nigeria, poultry productivity is hindered by high prevalence of aflatoxins in feeds. A practical solution to decrease crop aflatoxin content is to use aflatoxin biocontrol products based on non-toxin-producing strains of A. flavus. The biocontrol product Aflasafe® was registered in 2014 for use in maize and groundnut grown in Nigeria. Its use allows the production of aflatoxin-safe maize and groundnut. A portion of the maize treated with Aflasafe in Nigeria is being used to manufacture feeds used by the poultry industry, and productivity is improving. One of the conditions to register Aflasafe with the national regulator was to demonstrate both the safety of Aflasafe-treated maize to avian species and the impact of Aflasafe as a public good. Results presented here demonstrate that the use of maize colonized by an atoxigenic strain of Aflasafe resulted in superior (p < 0.05) broiler performance in all evaluated parameters in comparison to broilers fed with toxigenic maize. Use of an aflatoxin-sequestering agent (ASA) was not sufficient to counteract the harmful effects of aflatoxins. Both the safety and public good value of Aflasafe were demonstrated during our study. In Nigeria, the availability of aflatoxin-safe crops as a result of using Aflasafe allows poultry producers to improve their productivity, their income, and the health of consumers of poultry products.

scholarly journals Ameliorative Role of Nutraceutical Quercetin and its Derivatives Against Cognitive Impairment Process Induced by Lead Exposure in Drosophila melanogaster(Fruit Fly)

2021 ◽  
Vol 30 (2) ◽  
pp. 135-142
Author(s):  
Abubakar lema Abdullahi ◽  
A. A. Lema ◽  
K. Jibrin ◽  
W. Nuraddeen ◽  
E. M. Alexander
Keyword(s):  
Drosophila Melanogaster ◽  
Molecular Docking ◽  
Therapeutic Index ◽  
Fruit Fly ◽  
Acetylcholinesterase Activity ◽  
Docking Studies ◽  
Pharmacokinetic Studies ◽  
Glutathione S Transferase ◽  
High Therapeutic Index ◽  
In Silico Toxicity

Cumulative lifetime lead (Pb) exposure has been associated with accelerated declines in cognition through the free radical generation and epigenetic effects. Several pieces of literature have identified a correlation between exposure to lead and neurodegenerative disorders. Harwich strain Drosophila melanogaster was exposed to lead acetate for two weeks, and changes in pulse transmission by acetylcholinesterase and systemic redox were evaluated. Besides, molecular docking studies of acetylcholinesterase against Quercetin and its most common derivatives contained in food have been performed. Pharmacokinetic studies on Quercetin and its derivatives have also been performed in silico toxicity. The data obtained showed alterations in antioxidant enzymes and molecules such as catalase, glutathione-S-transferase, and glutathione. Upregulation of acetylcholinesterase activity was observed after treatment with Quercetin. In molecular docking tests, Quercetin and its derivatives were found to bind to acetylcholinesterase's active and peripheral pockets. Pharmacokinetic studies demonstrate moderate solubility, high therapeutic index, excellent absorption potential, hepatoprotective and non-mutagenic properties. With other antioxidant molecules, Quercetin may also play a crucial role in avoiding the development of Alzheimer's and associated antioxidant disorders.  

scholarly journals Assessment of water pollution in the Brazilian Pampa biome by means of stress biomarkers in tadpoles of the leaf frogPhyllomedusa iheringii(Anura: Hylidae)

PeerJ ◽  
2015 ◽  
Vol 3 ◽  
pp. e1016 ◽  
Author(s):  
TG Santos ◽  
R Melo ◽  
DG Costa-Silva ◽  
MEM Nunes ◽  
NR Rodrigues ◽  
...  
Keyword(s):  
Water Pollution ◽  
Stress Biomarkers ◽  
Pampa Biome
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