Assessment of acetylcholinesterase, catalase, and glutathione S-transferase as biomarkers for imidacloprid exposure in penaeid shrimp.

Autor: Butcherine P; Marine Ecology Research Centre, National Marine Science Centre, Southern Cross University, 2 Bay Drive Coffs Harbour, NSW 2450, Australia., Kelaher BP; Marine Ecology Research Centre, National Marine Science Centre, Southern Cross University, 2 Bay Drive Coffs Harbour, NSW 2450, Australia., Benkendorff K; Marine Ecology Research Centre, National Marine Science Centre, Southern Cross University, 2 Bay Drive Coffs Harbour, NSW 2450, Australia. Electronic address: kirsten.benkendorff@scu.edu.au.
Jazyk: angličtina
Zdroj: Aquatic toxicology (Amsterdam, Netherlands) [Aquat Toxicol] 2022 Jan; Vol. 242, pp. 106050. Date of Electronic Publication: 2021 Dec 04.
DOI: 10.1016/j.aquatox.2021.106050
Abstrakt: Shrimp aquaculture is a valuable source of quality seafood that can be impacted by exposure to insecticides, such as imidacloprid. Here, adult black tiger shrimp (Penaeus monodon) were used to evaluate the activity of acetylcholinesterase (AChE), catalase (CAT), and glutathione S-transferase (GST) in abdominal, head, gill, and hepatopancreas tissue as biomarkers for imidacloprid exposure. Adult P. monodon were continuously exposed to imidacloprid in water (5 μgL -1 and 30 μgL -1 ) or feed (12.5 μg g - 1 and 75 μg g - 1 ) for either 4 or 21 days. The imidacloprid concentration in shrimp tissues was determined using liquid chromatography-mass spectrometry after QuEChER extraction, and AChE, CAT, and GST activities were estimated by spectrophotometric assay. Imidacloprid exposure in shrimp elevated the activity of biomarkers, and the enzymatic activity was positively correlated to tissue imidacloprid accumulation, although the effects varied in a tissue-, dose- and time-dependent manner. AChE activity was correlated to imidacloprid concentration in the abdominal tissue of shrimp and was likely related to neural tissue distribution, while the activity of CAT and GST confirmed a generalised anti-oxidant stress response. AChE, CAT, and GST were valuable biomarkers for assessing shrimp response to imidacloprid exposure from dietary or water sources, and the abdominal tissue was the most reliable for exposure assessment. An elevated response in each of these biomarkers during routine monitoring could provide an early warning of shrimp stress, suggesting that investigating potential contamination by neonicotinoid pesticides would be worthwhile.
(Copyright © 2021 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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