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Chronic exposure to low-dose MC-LR induces ileal inflammation in mice through the PI3K/AKT/mTOR pathway.
J Toxicol Environ Health A
January 2025
School of Public Health, Hengyang Medical School, University of South China, Hengyang, China.
The global phenomenon of cyanobacterial bloom pollution is spreading globally due to climate change and eutrophication. It is well established that harmful cyanobacteria produce a wide range of toxins including microcystin-LR (MC-LR), a cyclic heptapeptide toxin known to damage various organs. The intestinal tract is the main site of MC-LR absorption and one of the targets susceptible to toxicity.
View Article and Find Full Text PDFLiver Lesions in Estuarine Dolphins in the Indian River Lagoon, Florida: Does Microcystin Play a Role?
Toxics
November 2024
Department of Ocean Engineering and Marine Sciences, Florida Institute of Technology, Melbourne, FL 32901, USA.
Microcystin (MC), a hepatotoxin produced by cyanobacteria, was introduced into the Indian River Lagoon (IRL), Florida, in 2005 through freshwater outflows. Since then, MC has been detected in humans, domestic animals, and wildlife in the lagoon. Potential public health effects associated with MC exposure along the IRL include an increased risk of non-alcoholic liver disease among area residents.
View Article and Find Full Text PDFDual-frequency ultrasonic oxidation of cyanobacterial toxins (MC-LR and MC-RR) at drinking water resources: Assessment of analytical methods and ultrasonic reactor configuration.
Ultrason Sonochem
December 2024
Ataturk University, Engineering Faculty, Environmental Engineering Department, Erzurum 25240, TÜRKİYE. Electronic address:
Ultrasonic oxidation provides the degradation of a wide range of water pollutants to the final products defined as carbon dioxide, short-chain organic acids, and inorganic ions, typically less toxic and favorable to biodegradation. In this study, it was investigated the application of novel ultrasonic reactor that allows the several combinations of low (20 kHz and 40 kHz) and high frequency ultrasonic piezoceramic transducer (578 kHz, 862 kHz and 1142 kHz) to degrade two main cyanobacterial toxins, Microcystin-RR (MC-RR) and Microcystin-LR (MC-LR). A plate transducer operating at different frequencies (40 kHz or 578 kHz/862 kHz/1142 kHz) was combined with a probe (20 kHz) as well as two plate transducers 40 kHz and 578 kHz/862 kHz/1142 kHz were combined to provide dual frequency ultrasonic reactor (DFUR).
View Article and Find Full Text PDFGold nanoparticles supported onto zwitterionic polymer capillary monoliths meant for efficient enrichment of microcystins in water.
Talanta
December 2024
Key Laboratory for Analytical Science of Food Safety and Biology, College of Chemistry, Fuzhou University, Fuzhou, 350116, China; International (HongKong Macao and Taiwan) Joint Laboratory on food safety and environmental analysis, Fuzhou, 350116, Fuzhou University, China; Engineering Technology Research Center on Reagent and Instrument for Rapid Detection of Product Quality and Food Safety, Fuzhou, 350116, China. Electronic address:
The release of microcystin (MCs) in aquatic ecosystems poses a substantial risk to the safety of irrigation and drinking water. In view of the challenges associated with monitoring MCs in water bodies, given their low concentration levels (μg/L to ng/L) and the presence of diverse matrix interferences, there is an urgent need to develop an efficient, cost-effective and selective enrichment technique for MCs prior to its quantification. In this work, a gold nanoparticles (AuNPs)-functionalized zwitterionic polymer monolith was described and further applied for the affinity enrichment of MCs.
View Article and Find Full Text PDFRapid microcystin-LR detection using antibody-based electrochemical biosensors with a simplified calibration curve approach.
Sci Rep
December 2024
Department of Civil, Environmental and Construction Engineering, University of Central Florida, Orlando, FL, USA.
Harmful algal blooms (HABs) can release cyanotoxins such as microcystins (MCs), especially, microcystin-leucine-arginine (MC-LR) which is one of the commonest and most toxic, into our water bodies and can lead to several acute or chronic diseases such as liver diseases and respiratory irritation in humans. There is an increasing need for rapid and simple detection of MC-LR in water bodies for early warning of HABs. In this study, we developed an innovative on-site screening electrochemical impedance spectroscopy (EIS) biosensor with a simplified calibration curve that can rapidly detect blooms for early action in similar water bodies.
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