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Glutathione reductase plays a role in the metabolism of methylmercury degradation in .
Microbiol Spectr
January 2025
School of Basic Medical Sciences, Xianning Medical College, Hubei University of Science and Technology, Xianning, China.
Unlabelled: Mercury pollution is a kind of heavy metal pollution with great harm and strong toxicity which exists worldwide. Some microorganisms can convert highly toxic methylmercury into inorganic mercury compounds with significantly reduced toxicity. This is an effective means of methylmercury pollution remediation.
View Article and Find Full Text PDFSpecies-specific mercury speciation in billfishes and its implications for food safety monitoring and dietary advice.
Environ Int
January 2025
IRD, Univ Brest, CNRS, Ifremer, LEMAR, IUEM, F-29280 Plouzané, France.
Humans are exposed to toxic methylmercury mainly by consuming marine fish, in particular top predator species like billfishes or tunas. In seafood risk assessments, mercury is assumed to be mostly present as organic methylmercury in predatory fishes; yet high percentages of inorganic mercury were recently reported in marlins, suggesting markedly different methylmercury metabolism across species. We quantified total mercury and methylmercury concentrations in muscle of four billfish species from the Indian and the Pacific oceans to address this knowledge gap.
View Article and Find Full Text PDFElevated methylmercury production in seasonally inundated sediments: Insights from DOM molecular composition.
J Hazard Mater
January 2025
Chongqing Vocational Institute of Engineering, Chongqing 402260, China.
Seasonally inundated areas (SIA) within aquatic systems are characterized by elevated methylmercury (MeHg) production. Nevertheless, the response characteristics of dissolved organic matter (DOM) quality in SIA sediments, including its molecular compositions and structure, and their impacts on the MeHg production are not yet fully understood. This research gap has been addressed through field investigations and microcosm experiments conducted in a metal-polluted plateau wetland.
View Article and Find Full Text PDFPhenol-Quinone Redox Couples of Natural Organic Matter Promote Mercury Methylation in Paddy Soil.
Environ Sci Technol
January 2025
National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China.
Methylmercury in paddy soils poses threats to food security and thus human health. Redox-active phenolic and quinone moieties of natural organic matter (NOM) mediate electron transfer between microbes and mercury during mercury reduction. However, their role in mercury methylation remains elusive.
View Article and Find Full Text PDFMethylmercury-induced visual deficits involve loss of GABAergic cells in the zebrafish embryo retina.
Sci Total Environ
January 2025
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, 100012 Beijing, China. Electronic address:
Methylmercury (MeHg) is a neurotoxicant with adverse effects on visual systems from fish to man. Clinical signs of visual deficits including color-vision alterations, visual field constriction and blindness have been frequently identified in patients and affected animals following acute and chronic exposure to MeHg. However, it is still unclear whether MeHg causes developmental defects in the eye.
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