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Effects of chronic exposure of waterborne copper on the antioxidant system and tissue accumulation in golden trout (Oncorhynchus mykiss aguabonita).
Fish Physiology and Biochemistry ( IF 2.9 ) Pub Date : 2020-05-07 , DOI: 10.1007/s10695-020-00810-y
Yan Chen 1 , Yucen Bai 2 , Xiaolu Hu 2 , Xiaofei Yang 1 , Shaogang Xu 1
Affiliation  

We assessed the acute and chronic effects of copper (Cu2+) on the antioxidant system in golden trout (Oncorhynchus mykiss aguabonita). The median lethal concentration after 96 h was determined as 0.24 mg L-1. We then used 0.06 (L) and 0.12 mg L-1 (H) Cu2+ to assess the responses of the antioxidant system to long-term exposure. The activities of superoxide dismutase, catalase, glutathione-S-transferase, glutathione peroxidase, glutathione reductase, reduced glutathione, and oxidized glutathione were measured in gill and liver tissue after 24 and 72 h and 7, 14, 21, and 28 days of exposure, as well as after 16 days of recovery in Cu2+-free water. Cu2+ accumulated to a greater extent in the liver than in the gill (0.61-0.75 mg kg-1 vs. 24.0-69.9 mg kg-1 in L group and 0.98-1.47 mg kg-1 vs. 33.3-66.03 mg kg-1 in H group). In the gill, we observed increases in the activities of superoxide dismutase, catalase, and glutathione peroxidase, as well as in the concentrations of reduced glutathione and oxidized glutathione. In the liver of L group, we observed increases in glutathione reductase activity and in the levels of reduced glutathione and oxidized glutathione. In L group, the activity of superoxide dismutase and reduced glutathione content increased after 24 h and then decreased over time, while catalase and glutathione reductase activity and oxidized glutathione levels increased. Data from the recovery period indicated that higher concentrations of Cu2+ may induce irreversible oxidative damage to the gill of golden trout.

中文翻译:

长期暴露于水铜对金鳟鱼(Oncorhynchus mykiss aguabonita)的抗氧化系统和组织积累的影响。

我们评估了铜(Cu2 +)对金鳟鱼(Oncorhynchus mykiss aguabonita)的抗氧化系统的急性和慢性作用。测定96小时后的中值致死浓度为0.24mg L-1。然后,我们使用0.06(L)和0.12 mg L-1(H)Cu2 +评估抗氧化剂系统对长期暴露的响应。在暴露后24和72 h以及7、14、21和28天后,测量g和肝脏组织中的超氧化物歧化酶,过氧化氢酶,谷胱甘肽S-转移酶,谷胱甘肽过氧化物酶,谷胱甘肽还原酶,还原型谷胱甘肽和氧化型谷胱甘肽的活性。 ,以及在不含Cu2 +的水中回收16天后。肝脏中的Cu2 +积累程度比the更高(L组为0.61-0.75 mg kg-1对24.0-69.9 mg kg-1,而0.98-1.47 mg kg-1对33.3-66.03 mg kg-1在H组)。在the中 我们观察到超氧化物歧化酶,过氧化氢酶和谷胱甘肽过氧化物酶的活性增加,以及还原型谷胱甘肽和氧化型谷胱甘肽的浓度增加。在L组的肝脏中,我们观察到了谷胱甘肽还原酶活性的增加以及还原型谷胱甘肽和氧化型谷胱甘肽的水平的增加。在L组中,超氧化物歧化酶的活性和减少的谷胱甘肽含量在24小时后增加,然后随时间下降,而过氧化氢酶和谷胱甘肽还原酶活性和氧化型谷胱甘肽水平增加。恢复期的数据表明,较高浓度的Cu2 +可能对金鳟out产生不可逆的氧化损伤。以及还原型谷胱甘肽和氧化型谷胱甘肽的浓度。在L组的肝脏中,我们观察到了谷胱甘肽还原酶活性的增加以及还原型谷胱甘肽和氧化型谷胱甘肽的水平的增加。在L组中,超氧化物歧化酶的活性和减少的谷胱甘肽含量在24小时后增加,然后随时间下降,而过氧化氢酶和谷胱甘肽还原酶活性和氧化型谷胱甘肽水平增加。恢复期的数据表明,较高浓度的Cu2 +可能对金鳟out产生不可逆的氧化损伤。以及还原型谷胱甘肽和氧化型谷胱甘肽的浓度。在L组的肝脏中,我们观察到了谷胱甘肽还原酶活性的增加以及还原型谷胱甘肽和氧化型谷胱甘肽的水平的增加。在L组中,超氧化物歧化酶的活性和减少的谷胱甘肽含量在24小时后增加,然后随时间下降,而过氧化氢酶和谷胱甘肽还原酶活性和氧化型谷胱甘肽水平增加。恢复期的数据表明,较高浓度的Cu2 +可能对金鳟the产生不可逆的氧化损伤。超氧化物歧化酶的活性和降低的谷胱甘肽含量在24小时后升高,然后随时间降低,而过氧化氢酶和谷胱甘肽还原酶活性和氧化型谷胱甘肽水平升高。恢复期的数据表明,较高浓度的Cu2 +可能对金鳟out产生不可逆的氧化损伤。超氧化物歧化酶的活性和降低的谷胱甘肽含量在24小时后升高,然后随时间下降,而过氧化氢酶和谷胱甘肽还原酶活性和氧化型谷胱甘肽水平升高。恢复期的数据表明,较高浓度的Cu2 +可能对金鳟out产生不可逆的氧化损伤。
更新日期:2020-05-07
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