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- W1580786546 abstract "Paraquat (PQ; 1, 1′-dimethyl-4-4′-bipyridinium), an herbicide and model neurotoxicant, is identified to be one of the prime risk factors in Parkinson's disease (PD). In the Drosophila system, PQ is commonly used to measure acquired resistance against oxidative stress (PQ resistance test). Despite this, under acute PQ exposure, data on the oxidative stress response and associated impact on mitochondria among flies is limited. Accordingly, in this study, we measured markers of oxidative stress and mitochondrial dysfunctions among adult male flies (8–10 days old) exposed to varying concentrations of PQ (10, 20, and 40 mM in 5% sucrose solution) employing a conventional filter disc method for 24 h. PQ exposure resulted in significant elevation in the levels of oxidative stress biomarkers (malondialdehyde: 43% increase: hydroperoxide: 32–39% increase), with concomitant enhancement in reduced glutathione and total thiol levels in cytosol. Higher activity of antioxidant enzymes were also evident along with increased free iron levels. Furthermore, PQ exposure caused a concentration-dependent increase in mitochondrial superoxide generation and activity of manganese-superoxide dismutase (Mn-SOD). The activity levels of complex I-III, complex II-III, and Mg+2 adinosine triphosphatase (ATPase) were also decreased significantly. A robust diminution in the activity of succinate dehydrogenase and moderate decline in the citrate synthase activity suggested a specific effect on citric acid cycle enzymes. Collectively, these data suggest that acute PQ exposure causes significant oxidative stress and mitochondrial dysfunction among flies in vivo. It is suggested that in various experimental settings, while conducting the “PQ resistance stress test” incorporation of selected biochemical end points is likely to enhance the quality of the data." @default.
- W1580786546 created "2016-06-24" @default.
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- W1580786546 date "2013-04-05" @default.
- W1580786546 modified "2023-10-18" @default.
- W1580786546 title "ACUTE EXPOSURE OF<i>Drosophila melanogaster</i>TO PARAQUAT CAUSES OXIDATIVE STRESS AND MITOCHONDRIAL DYSFUNCTION" @default.
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- W1580786546 doi "https://doi.org/10.1002/arch.21094" @default.
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