Fatty acid metabolism and antioxidant capacity in Gymnocypris przewalskii (Kessler, 1876) response to thermal stress

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	Fatty acid metabolism and antioxidant capacity in Gymnocypris przewalskii (Kessler, 1876) response to thermal stress
	Liu, Sijia; Chen, Shengxue; Lu, Chunna; Qi, Delin; Qi, Hongfang; Wang, Yang; Zhao, Kai; Tian, Fei
	2023
发表期刊	JOURNAL OF THERMAL BIOLOGY
卷号	116
摘要	The Qinghai-Tibet Plateau is undergoing a wet-warming transition, which could affect the survival of the native fish. However, the tolerance and physiological response to thermal stress is rarely studied in Gymnocypris przewalskii, a rare native fish in the Tibetan plateau. In this study, first, we detected the thermal tolerance of five groups of six-month G. przewalskii which acclimated at 8, 12, 16, 20, and 24 & DEG;C for two weeks, respectively, by critical thermal methodology. Then, through heat challenge, we detected the metabolites, key enzyme activities, and gene expressions involved in metabolism and antioxidant in the hepatopancreas when the temperatures increased from 16 & DEG;C to 18, 20, 22, 24, 26, and 28 & DEG;C for 12 h, respectively. The results showed that although the fish are sensitive to high temperatures, the quick acclimation at mild high temperatures could significantly improve the tolerance to acute high-temperature stress in juvenile G. przewalskii. During the heat challenge study, blood glucose significantly increased at heat stress (P < 0.05). At the same time, total cholesterol (TC), triglyceride (TG), and free fatty acid (FFA) significantly decreased when the temperature rose continuously to 20 & DEG;C. Metabolic enzyme activities of carnitine palmityl transferase I (CPT-I), acetyl-CoA carboxylase (ACC), and fatty acid synthase (FAS) significantly decreased at 20 & DEG;C (P < 0.05). Superoxide dismutase (SOD) and antioxidant capacity (T-AOC) significantly increased at 20 & DEG;C (P < 0.05). The relative transcript levels of genes involved in antioxidant and glycolysis/gluconeogenesis were markedly higher than the control at 20-26 & DEG;C (P < 0.05). The genes involved in fatty acid biosynthesis or metabolism showed different expression patterns under heat stress. Heat shock protein 70 (Hsp70) and Hsp90 were significantly higher than the control at 18 & DEG;C and 26 & DEG;C, respectively. These results confirmed the prediction that G. przewalskii is sensitive to high temperatures, so conservation efforts should pay more attention to the warming damage.
收录类别	SCIE
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/61610
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Liu, Sijia,Chen, Shengxue,Lu, Chunna,et al. Fatty acid metabolism and antioxidant capacity in Gymnocypris przewalskii (Kessler, 1876) response to thermal stress[J]. JOURNAL OF THERMAL BIOLOGY,2023,116.
APA	Liu, Sijia.,Chen, Shengxue.,Lu, Chunna.,Qi, Delin.,Qi, Hongfang.,...&Tian, Fei.(2023).Fatty acid metabolism and antioxidant capacity in Gymnocypris przewalskii (Kessler, 1876) response to thermal stress.JOURNAL OF THERMAL BIOLOGY,116.
MLA	Liu, Sijia,et al."Fatty acid metabolism and antioxidant capacity in Gymnocypris przewalskii (Kessler, 1876) response to thermal stress".JOURNAL OF THERMAL BIOLOGY 116(2023).