Hypoxia aggravates the burden of yellowstripe goby (Mugilogobius chulae) under atorvastatin exposure

• Published in: Aquatic toxicology Vol. 255; p. 106381
• Main Authors: Wang, Yimeng, Tang, Tianli, Ren, Jinzhi, Zhao, Yufei, Hou, Yingshi, Nie, Xiangping
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 01.02.2023
• Subjects: Animals; Aquatic Organisms - metabolism; Atorvastatin; Atorvastatin - toxicity; Fishes - metabolism; Hypoxia; Lipid metabolism; Mugilogobius chulae; Perciformes - metabolism; Transcriptome; Water Pollutants, Chemical - toxicity; Atorvastatin; Hypoxia; Lipid metabolism; Mugilogobius chulae; Transcriptome
• ISSN: 0166-445X; 1879-1514
• DOI: 10.1016/j.aquatox.2022.106381

•Atorvastatin (ATV)-hypoxia exposure affected lipid metabolism and lead to energy crisis in Mugilogobius chulae (M. chulae).•HIF, PPAR, tp53, sirt1 were key regulatory factors of energy stress in M. chulae under ATV-hypoxia exposure.•Hypoxia aggravated the burden of ATV exposure to M. chulae.•M. chulae was more sensitive to ATV under hypoxia than normoxia. In the present study, an estuarine benthic fish, Mugilogobius chulae (M. chulae), was exposed to hypoxia, atorvastatin (ATV), a highly used and widely detected lipid-lowering drug in aquatic environment, and the combination of hypoxia and ATV for 7 days, respectively, so as to address and compare the effects of the combination of hypoxia and ATV exposure on M. chulae. The results showed that lipid metabolism in M. chulae was greatly affected: lipid synthesis was blocked and catabolism was enhanced, exhibiting that lipids content were heavily depleted. The combined exposure of hypoxia and ATV caused oxidative stress and induced massive inflammatory response in the liver of M. chulae. Signaling pathways involving in energy metabolism and redox responses regulated by key factors such as HIF, PPAR, p53 and sirt1 play important regulatory roles in hypoxia-ATV stress. Critically, we found that the response of M. chulae to ATV was more sensitive under hypoxia than normoxia. ATV exposure to aquatic non-target organisms under hypoxic conditions may make a great impact on the detoxification and energy metabolism, especially lipid metabolism, and aggravate the oxidative pressure of the exposed organisms.