Accumulation, elimination and neuro-oxidative damage under lanthanum exposure in glass eels (Anguilla anguilla)

Chemosphere
Cátia FigueiredoJoana Raimundo

Abstract

Rare earth elements (REEs) comprise elements from lanthanum to lutetium that together with yttrium and scandium are emergent contaminants of critical importance for numerous groundbreaking environmental technologies. Transfer to aquatic ecosystems is expected to increase, however, little information is known about their potential impacts in marine biota. Considering the endangered conservation status of the European eel (Anguilla anguilla) and the vulnerability of early fish life stages to contaminants, we exposed glass eels, through water, to an environmentally relevant concentration (120 ng.L-1) of lanthanum (La) for 7 days (plus 7 days of depuration). The aim was to study the accumulation and elimination of La in eel's body and subsequent quantification of acetylcholinesterase (AchE), lipid peroxidation and antioxidant enzymatic machinery. Accumulation peaked after 72 h-exposure to La, decreasing afterwards, even in continuous exposure. Accumulation was higher in the viscera, followed by the skinless body and ultimately in the head, possibly as a protective mechanism to cope with La neurotoxicity. A significant increase in AChE activity was observed in La-exposed glass eels, suggesting that La3+ may inhibit the binding of ac...Continue Reading

Citations

Sep 20, 2020·Animals : an Open Access Journal From MDPI·Nemi MalhotraChung-Der Hsiao
Sep 6, 2020·The Science of the Total Environment·Iara da C SouzaMarisa N Fernandes
Nov 14, 2020·Journal of Hazardous Materials·Iara C SouzaMarisa N Fernandes
Jul 30, 2021·The Science of the Total Environment·Madalena AndradeRosa Freitas

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