Co-Occurrence of Cyanotoxins and Phycotoxins in One of the Largest Southeast Asian Brackish Waterbodies: A Preliminary Study at the Tam Giang—Cau Hai Lagoon (Vietnam) DOI Creative Commons

D. K. Sahoo,

Ngoc Khanh Ni Tran,

Thi Nguyen

et al.

Limnological Review, Journal Year: 2024, Volume and Issue: 24(3), P. 335 - 353

Published: Aug. 25, 2024

The Tam Giang-Cau Hai lagoon (TGCH) in Thua Thien Hue province (Vietnam) is a marsh/lagoon system and ranks among the largest waterbodies Southeast Asia. It plays significant role terms of both socio-economic environmental resources. However, anthropogenic stress, as well discharge untreated domestic industrial sewage with agricultural runoff from its three major tributaries, dramatically damages water quality lagoon. Especially after heavy rain flash floods, continuous degradation quality, followed by harmful algal cyanobacterial bloom patterns (HABs), more perceptible. In this study, several physicochemical factors, cyanotoxins (anatoxins (ATXs), saxitoxins (STXs), microcystins (MCs)), phycotoxins (STXs, okadaic acid (OA), dinophysistoxins (DTXs)) were analyzed shellfish samples 13 stations June 2023 stations, using enzyme-linked immunosorbent assay (ELISA) kits for ATXs STXs, serine/threonine phosphatase type 2A (PP2A) inhibition kit MCs, OA, DTXs. results showed first time co-occurrence freshwater marine Traces STXs detected orders magnitude below seafood safety action levels. toxins inhibiting PP2A enzyme, such MCs nodularin (NODs), OA DTXs, at higher concentrations (maximum: 130.4 μg equiv. MC-LR/kg meat wet weight), approaching actionable level proposed class toxin (160 equivalent per kg edible bivalve mollusk meat). very important to note that due possible false positives produced ELISA test complex matrices crude extract, preliminary pilot research will be repeated sophisticated method, liquid chromatography coupled mass spectroscopy (LC-MS), upcoming plan.

Language: Английский

Co-Occurrence of Cyanotoxins and Phycotoxins in One of the Largest Southeast Asian Brackish Waterbodies: A Preliminary Study at the Tam Giang—Cau Hai Lagoon (Vietnam) DOI Creative Commons

D. K. Sahoo,

Ngoc Khanh Ni Tran,

Thi Nguyen

et al.

Limnological Review, Journal Year: 2024, Volume and Issue: 24(3), P. 335 - 353

Published: Aug. 25, 2024

The Tam Giang-Cau Hai lagoon (TGCH) in Thua Thien Hue province (Vietnam) is a marsh/lagoon system and ranks among the largest waterbodies Southeast Asia. It plays significant role terms of both socio-economic environmental resources. However, anthropogenic stress, as well discharge untreated domestic industrial sewage with agricultural runoff from its three major tributaries, dramatically damages water quality lagoon. Especially after heavy rain flash floods, continuous degradation quality, followed by harmful algal cyanobacterial bloom patterns (HABs), more perceptible. In this study, several physicochemical factors, cyanotoxins (anatoxins (ATXs), saxitoxins (STXs), microcystins (MCs)), phycotoxins (STXs, okadaic acid (OA), dinophysistoxins (DTXs)) were analyzed shellfish samples 13 stations June 2023 stations, using enzyme-linked immunosorbent assay (ELISA) kits for ATXs STXs, serine/threonine phosphatase type 2A (PP2A) inhibition kit MCs, OA, DTXs. results showed first time co-occurrence freshwater marine Traces STXs detected orders magnitude below seafood safety action levels. toxins inhibiting PP2A enzyme, such MCs nodularin (NODs), OA DTXs, at higher concentrations (maximum: 130.4 μg equiv. MC-LR/kg meat wet weight), approaching actionable level proposed class toxin (160 equivalent per kg edible bivalve mollusk meat). very important to note that due possible false positives produced ELISA test complex matrices crude extract, preliminary pilot research will be repeated sophisticated method, liquid chromatography coupled mass spectroscopy (LC-MS), upcoming plan.

Language: Английский

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