Oxidative stress has been pointed as an important molecular mechanism for liver injury in methylmercury (MeHg) poisoning. Ebselen, a seleno-organic compound that possesses anti-oxidant properties, is a useful therapeutic agent used in clinical situations involving oxidative stress. Here, we examined the possible in vivo protective effect of ebselen against the pro-oxidative effects of MeHg in l...

Although the intense biogeochemical gradients present in riparian zones have the potential to affect mercury (Hg) cycling, Hg dynamics in riparian zones has received relatively little attention in the literature. Our study investigated groundwater filtered total mercury (THg) and methylmercury (MeHg) dynamics in three riparian zones with contrasting hydrogeomorphic (HGM) characteristics (till, ...

We assessed methylmercury (MeHg) concentrations across multiple ecological scales in the Edisto (South Carolina) and Upper Hudson (New York) River basins. Out-of-channel wetland/floodplain environments were primary sources of filtered MeHg (F-MeHg) to the stream habitat in both systems. Shallow, open-water areas in both basins exhibited low F-MeHg concentrations and decreasing F-MeHg mass flux....

We studied total mercury (THg) and methylmercury (MeHg) in eight streams, located in Oregon, Wisconsin, and Florida, that span large ranges in climate, landscape characteristics, atmospheric Hg deposition, and water chemistry. While atmospheric deposition was the source of Hg at each site, basin characteristics appeared to mediate this source by providing controls on methylation and fluvial THg...

Methylmercury (MeHg) is a highly toxic environmental pollutant that causes severe neurological disorders. Considering the neuroprotective property of Bacopa monniera, this study was aimed to evaluate protective effect of Bacopa monniera extract (BME) against MeHg induced mitochondrial dysfunction. Rats were exposed to MeHg by gavage (5mg/kg, b.w) and BME was administered (40 mg/kg, orally) 1 ho...

As the concentration of methylmercury (MeHg) in the environment is insignificant, hair can be used as a suitable matrix to estimate endogenous MeHg exposure. Avalidated analytical method with AMA 254 spectrometer was used for the determination of inorganic mercury and methylmercury species in the hair of dentists, workers in fish industry and professionally non-exposed adults. ANOVA and QC Expe...

Methylmercury (MeHg) is recognized as one of the most hazardous environmental pollutants, primarily due to endemic disasters that have occurred repeatedly. A review of the earlier literature on the Minamata outbreak shows how large-scale poisoning occurred and why it could not be prevented. With the repeated occurrences of MeHg poisoning, it gradually became clear that the fetus is much more su...

Because fish represent the principal methylmercury (MeHg) pool in the water column of freshwater systems, MeHg released from their carcasses could represent an important flux to the environment. Necrophagous invertebrates such as fly larvae can play an important role in this Hg recycling. We studied Hg accumulation by blowflies (Diptera, Calliphoridae) feeding on beached fish carcasses in the f...

This study aims at the assessment of mercury (Hg)-selenium (Se) antagonism in fish. For this purpose, rainbow trout fish (Oncorhynchus mykiss) were exposed to methylmercury (MeHg) under controlled conditions, presence or absence selenomethionine (SeMet) using an in-house prepared diet (enriched with MeHg and SeMet 0.2 μg/g 5.0 μg/g, respectively). The total duration exposure was 3 months. Fish ...

Methylmercury in soils and vegetation from the Amazonian rainforest is still poorly studied. Hence, aim of this work was to determine total mercury [THg] methylmercury [MeHg] concentrations litter surface soil, MeHg deposition via litterfall, fate during a forest fire rainforest. Sampling litter, soil (0–1, 1–2, 2–5 cm), ash carried out before (BB) after (AB) prescribed fire. The results showed...