Effects of nitrate (NO3−) stress-induced exacerbated cadmium (Cd2+) toxicity on the inflammatory response, oxidative defense, and apoptosis in juvenile Japanese flounder (Paralichthys olivaceus)

Yu, Jiachen; Lian, Jie; Wan, Yingying; Li, Xiangyuan; Liu, Pengfei; Ji, Qing; Zhou, Suyue; Zheng, Nianhao; Wang, Xingqiang

doi:10.1016/j.jes.2024.05.036

Journal of Environmental Sciences

2025

DOI: 10.1016/j.jes.2024.05.036

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Effects of nitrate (NO3−) stress-induced exacerbated cadmium (Cd2+) toxicity on the inflammatory response, oxidative defense, and apoptosis in juvenile Japanese flounder (Paralichthys olivaceus)

Jiachen Yu,

Jie Lian,

Yingying Wan

et al.

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Assessing the effects of cadmium on antioxidant enzymes and histological structures in rainbow trout liver and kidney

Taysı

2024

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Cadmium contamination in aquatic environments poses severe risks to aquatic organisms, particularly fish, where cadmium accumulation in tissues can lead to compromised organ functionality and reproductive issues. The present study aimed to assess the effects of cadmium (Cd) exposure on key biomarkers of oxidative stress, DNA damage, apoptosis, and enzyme activity in the liver and kidney tissues of rainbow trout ( Oncorhynchus mykiss ). Specifically, the study measured 8-hydroxy-2-deoxyguanosine (8-OHdG) levels, caspase-3 activation, acetylcholinesterase (AChE) activity, and oxidative stress indicators (ONOO − , MDA, GSH, SOD, and CAT) following exposure to three Cd concentrations (1, 3, and 5 mg/L) over three time points (24, 48, and 96 h). Tissue samples were collected post-exposure, and the analysis revealed a significant decrease in MDA levels in both tissues. GSH concentrations declined with prolonged exposure, while SOD activity increased, indicating a response to oxidative stress, contrasted by a reduction in CAT activity. An initial increase in ONOO − levels was observed at 24 h, followed by a subsequent decrease at the 48 and 96 h marks. These results suggest that cadmium induces oxidative stress in the liver and kidney tissues of fish. Cadmium exposure also significantly elevated 8-OHdG levels, signaling DNA damage, and increased caspase-3 activity, indicative of apoptosis, across all doses and time points (p < 0.05). The histological examination of liver and kidney showed tissue injury. Additionally, a negative correlation between AChE activity and exposure duration was noted, with prolonged exposure resulting in substantial AChE inhibition. Given the role of AChE in behavior regulation, these findings underscore the importance of exploring time-dependent, tissue-specific changes in AChE activity to further elucidate the mechanisms underlying cadmium-induced behavioral abnormalities.

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Assessing the effects of cadmium on antioxidant enzymes and histological structures in rainbow trout liver and kidney

Taysı

2024

Sci Rep

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Effects of nitrate (NO3−) stress-induced exacerbated cadmium (Cd2+) toxicity on the inflammatory response, oxidative defense, and apoptosis in juvenile Japanese flounder (Paralichthys olivaceus)

Cited by 1 publication

References 80 publications

Assessing the effects of cadmium on antioxidant enzymes and histological structures in rainbow trout liver and kidney

Assessing the effects of cadmium on antioxidant enzymes and histological structures in rainbow trout liver and kidney

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