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Hypoxia tolerance in fish depends on catabolic preference between lipids and carbohydrates

Zoological Research 2023年第5期44卷 954-966页

作者： Qiang Ma Yuan Luo Jia Zhong Samwel Mchele Limbu Ling-Yu Li Li-Qiao Chen Fang Qiao Mei-Ling Zhang Qiang Lin Zhen-Yu Du LANEH School of Life SciencesEast China Normal UniversityShanghai 200241China Yellow Sea Fisheries Research Institute Chinese Academy of Fishery SciencesQingdaoShandong 266071China CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhouGuangdong 510301China School of Aquatic Sciences and Fisheries Technology University of Dar es SalaamDar es Salaam 60091Tanzania

Hypoxia is a common environmental stress factor in aquatic organisms,which varies among fish ***,the mechanisms underlying the ability of fish species to tolerate hypoxia are not well ***,we showed that hypoxia response in different fish species was affected by lipid catabolism and preference for lipid or carbohydrate energy *** of biochemical lipid catabolism through peroxisome proliferator-activated receptor alpha(Pparα)or increasing mitochondrial fat oxidation in tilapia decreased tolerance to acute hypoxia by increasing oxygen consumption and oxidative damage and reducing carbohydrate catabolism as an energy ***,lipid catabolism inhibition by suppressing entry of lipids into mitochondria in tilapia or individually knocking out three key genes of lipid catabolism in zebrafish increased tolerance to acute hypoxia by decreasing oxygen consumption and oxidative damage and promoting carbohydrate ***,anaerobic glycolysis suppression eliminated lipid catabolism inhibition-promoted hypoxia tolerance in adipose triglyceride lipase(atgl)mutant *** 14 fish species with different trophic levels and taxonomic status,the fish preferentially using lipids for energy were more intolerant to acute hypoxia than those preferentially using *** study shows that hypoxia tolerance in fish depends on catabolic preference for lipids or carbohydrates,which can be modified by regulating lipid catabolism.

关键词： Hypoxia tolerance catabolic preference Lipid Carbohydrate Oxidative damage

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