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Open AccessArticle

Effect of Chronic Exposure to Pesticide Methomyl on Antioxidant Defense System in Testis of Tilapia (Oreochromis niloticus) and Its Recovery Pattern

by 1,2,†, 1,2,†, 1, 1, 1, 1, 1,2,* and 1,2,*
1
Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China
2
Wuxi Fishery College, Nanjing Agricultural University, Wuxi 214081, China
*
Authors to whom correspondence should be addressed.
Authors contributed equally to this paper.
Academic Editor: Kyunghee Ji
Appl. Sci. 2021, 11(8), 3332; https://doi.org/10.3390/app11083332
Received: 26 February 2021 / Revised: 31 March 2021 / Accepted: 1 April 2021 / Published: 8 April 2021
The chronic effect of environmental methomyl on the antioxidant system in testis of Nile tilapia (Oreochromis niloticus) and its recovery pattern was investigated. Tilapia were exposed to sublethal concentrations of 0.2, 2, 20 and 200 μgL−1 methomyl for 30 days and thereafter moved to methomyl-free water for 18 days. Antioxidant levels in testis, including glutathione peroxidase, catalase, glutathione-S-transferase, glutathione reductase, superoxide dismutase, reduced glutathione, oxidized glutathione were measured every 6 days during the period of exposure, and at 18 days after being transferred to methomyl-free water. The results showed that lower methomyl concentration (0.2 μgL−1) had no effect on the above antioxidants, thus 0.2 μgL−1 could be seen as NOAEL for methomyl to tilapia. However, higher methomyl concentration of 2, 20 and 200 μgL−1 could significantly influence the above antioxidants. Glutathione peroxidase and oxidized glutathione increased significantly. On the contrary, reduced glutathione decreased significantly. Catalase, superoxide dismutase, glutathione reductase, glutathione-S-transferase increased at lower methomyl (2 and 20 μgL−1), but decreased at higher methomyl (200 μgL−1). The recovery test showed that oxidative damage caused by lower methomyl of 2 and 20 μgL−1 was reversible, and oxidative damage caused by higher methomyl of 200 μgL−1 was irreversible within 18 days of recovery period. View Full-Text
Keywords: tilapia; biomarkers; catalase; glutathione peroxidase; glutathione reductase; glutathione-S-transferase; oxidized glutathione; reduced glutathione; superoxide dismutase tilapia; biomarkers; catalase; glutathione peroxidase; glutathione reductase; glutathione-S-transferase; oxidized glutathione; reduced glutathione; superoxide dismutase
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MDPI and ACS Style

Meng, S.; Chen, X.; Song, C.; Fan, L.; Qiu, L.; Zheng, Y.; Chen, J.; Xu, P. Effect of Chronic Exposure to Pesticide Methomyl on Antioxidant Defense System in Testis of Tilapia (Oreochromis niloticus) and Its Recovery Pattern. Appl. Sci. 2021, 11, 3332. https://doi.org/10.3390/app11083332

AMA Style

Meng S, Chen X, Song C, Fan L, Qiu L, Zheng Y, Chen J, Xu P. Effect of Chronic Exposure to Pesticide Methomyl on Antioxidant Defense System in Testis of Tilapia (Oreochromis niloticus) and Its Recovery Pattern. Applied Sciences. 2021; 11(8):3332. https://doi.org/10.3390/app11083332

Chicago/Turabian Style

Meng, Shunlong; Chen, Xi; Song, Chao; Fan, Limin; Qiu, Liping; Zheng, Yao; Chen, Jiazhang; Xu, Pao. 2021. "Effect of Chronic Exposure to Pesticide Methomyl on Antioxidant Defense System in Testis of Tilapia (Oreochromis niloticus) and Its Recovery Pattern" Appl. Sci. 11, no. 8: 3332. https://doi.org/10.3390/app11083332

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