A circular toxicity approach to isoprostanes: From markers of oxidative stress, to epidemiological warning systems and agents of aquatic toxicity
authors Pais, RT; Sousa, ACA; Pastorinho, MR
nationality International
journal ENVIRONMENTAL POLLUTION
author keywords Lipid peroxidation; Oxidative stress; Sewage epidemiology; Ecotoxicity
keywords WATER-BASED EPIDEMIOLOGY; WASTE-WATER; F-2-ISOPROSTANE LEVELS; MASS-SPECTROMETRY; POPULATION-SIZE; BIOMARKERS; PEROXIDATION; CHEMISTRY; EXPOSURE; F2-ALPHA
abstract Isoprostanes (IsoPs) are a class of oxidation products naturally formed in vivo that are indicative of endogenous oxidative stress. In individuals with chronic and oxidative stress related diseases, IsoPs are increased to pathological levels. Since they are excreted through urine into sewage systems, IsoPs can be detected in wastewater treatment plants' (WWTPs) effluents and thus can be used to evaluate the health status of a given population. The underlying principle is that higher isoprostanes WWTPs' levels correspond to populations undergoing higher levels of oxidative stress, and thus disease. However, IsoPs are not eliminated by WWTPs and will end up being released into the aquatic environment, where they will be available for uptake by aquatic species. Being bioactive molecules, it has been suggested that IsoPs in the environment may elicit oxidative stress in aquatic organisms. In this context, we have critically reviewed the available data on IsoPs as products and effectors of toxicity, and propose the new concept of "circular toxicity". In general, IsoPs excreted by humans as a consequence of oxidative stress are released into the aquatic environment where they may interact with aquatic organisms and induce the production of more IsoPs. These stress markers, in turn, will also be excreted, increasing the already high levels of stressors in the aquatic environment and thus create an escalating cycle of oxidative stress. (C) 2018 Elsevier Ltd. All rights reserved.
publisher ELSEVIER SCI LTD
issn 0269-7491
year published 2018
volume 243
beginning page 654
ending page 660
digital object identifier (doi) 10.1016/j.envpol.2018.09.033
web of science category Environmental Sciences
subject category Environmental Sciences & Ecology
unique article identifier WOS:000449891800071
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