PMID- 36871632 OWN - NLM STAT- MEDLINE DCOM- 20230404 LR - 20230404 IS - 1095-9947 (Electronic) IS - 1050-4648 (Linking) VI - 135 DP - 2023 Apr TI - Different reoxygenation rates induce different metabolic, apoptotic and immune responses in Golden Pompano (Trachinotus blochii) after hypoxic stress. PG - 108640 LID - S1050-4648(23)00126-2 [pii] LID - 10.1016/j.fsi.2023.108640 [doi] AB - Dissolved oxygen (DO) is essential for teleosts, and fluctuating environmental factors can result in hypoxic stress in the golden pompano (Trachinotus blochii). However, it is unknown whether different recovery speeds of DO concentration after hypoxia induce stress in T. blochii. In this study, T. blochii was subjected to hypoxic conditions (1.9 +/- 0.2 mg/L) for 12 h followed by 12 h of reoxygenation at two different speeds (30 mg/L per hour and 1.7 mg/L per hour increasing). The gradual reoxygenation group (GRG), experienced DO recovery (1.9 +/- 0.2 to 6.8 +/- 0.2 mg/L) within 3 h, and the rapid reoxygenation group (RRG), experienced DO recovery (1.9 +/- 0.2 to 6.8 +/- 0.2 mg/L) within 10 min. Physiological and biochemical parameters of metabolism (glucose, glycegon, lactic acid (LD), lactate dehydrogenase (LDH), pyruvic acid (PA), phosphofructokinase (PFKA), and hexokinase (HK), triglyceride (TG), lipoprotein lipase (LPL), carnitine palmitoyltransferase 1 (CPT-1)) and transcriptome sequencing (RNA-seq of liver) were monitored to identify the effects of the two reoxygenation speeds. Increased LD content and increased activity of LDH, PA, PFKA, and HK suggested enhanced anaerobic glycolysis under hypoxic stress. LD and LDH levels remained significantly elevated during reoxygenation, indicating that the effects of hypoxia were not immediately alleviated during reoxygenation. The expressions of PGM2, PFKA, GAPDH, and PK were increased in the RRG, which suggests that glycolysis was enhanced. The same pattern was not observed in the GRG. Additionally, In the RRG, reoxygenation may promote glycolysis to guarantee energy supply. However, the GRG may through the lipid metabolism such as steroid biosynthesis at the later stage of reoxygenation. In the aspect of apoptosis, differentially expressed genes (DEGs) in the RRG were enriched in the p53 signaling pathway, which promoted cell apoptosis, while DEGs in the GRG seem to activate cell apoptosis at early stage of reoxygenation but was restrained latterly. DEGs in both the RRG and the GRG were enriched in the NF-kappa B and JAK-STAT signaling pathways, the RRG may induce cell survival by regulating the expression of IL-12B, COX2, and Bcl-XL, while in the GRG it may induce by regulating the expression of IL-8. Moreover, DEGs in the RRG were also enriched in the Toll-like receptor signaling pathway. This research revealed that at different velocity of reoxygenation after hypoxic stress, T. blochii would represent different metabolic, apoptotic and immune strategies, and this conclusion would provide new insight into the response to hypoxia and reoxygenation in teleosts. CI - Copyright (c) 2023. Published by Elsevier Ltd. FAU - Jiang, Tian AU - Jiang T AD - State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Aquaculture Breeding Engineering Research Center, Hainan Academician Team Innovation Center, Hainan University, Haikou, 570228, China. Electronic address: jiangtian28@126.com. FAU - Liang, Ye Song AU - Liang YS AD - State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Aquaculture Breeding Engineering Research Center, Hainan Academician Team Innovation Center, Hainan University, Haikou, 570228, China. Electronic address: 912006100@qq.com. FAU - Gu, Yue AU - Gu Y AD - State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Aquaculture Breeding Engineering Research Center, Hainan Academician Team Innovation Center, Hainan University, Haikou, 570228, China. Electronic address: y5187244@163.com. FAU - Yao, Fu Cheng AU - Yao FC AD - State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Aquaculture Breeding Engineering Research Center, Hainan Academician Team Innovation Center, Hainan University, Haikou, 570228, China. Electronic address: 179644632@qq.com. FAU - Liu, Yi Fan AU - Liu YF AD - State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Aquaculture Breeding Engineering Research Center, Hainan Academician Team Innovation Center, Hainan University, Haikou, 570228, China. Electronic address: 351053449@qq.com. FAU - Zhang, Kai Xi AU - Zhang KX AD - State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Aquaculture Breeding Engineering Research Center, Hainan Academician Team Innovation Center, Hainan University, Haikou, 570228, China. Electronic address: 1292943358@qq.com. FAU - Song, Fei Biao AU - Song FB AD - State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Aquaculture Breeding Engineering Research Center, Hainan Academician Team Innovation Center, Hainan University, Haikou, 570228, China. Electronic address: songfb1014@126.com. FAU - Sun, Jun Long AU - Sun JL AD - State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Aquaculture Breeding Engineering Research Center, Hainan Academician Team Innovation Center, Hainan University, Haikou, 570228, China. Electronic address: 1988sunjunlong@sina.com. FAU - Luo, Jian AU - Luo J AD - State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Aquaculture Breeding Engineering Research Center, Hainan Academician Team Innovation Center, Hainan University, Haikou, 570228, China. Electronic address: luojian@hainanu.edu.cn. LA - eng PT - Journal Article DEP - 20230305 PL - England TA - Fish Shellfish Immunol JT - Fish & shellfish immunology JID - 9505220 RN - S88TT14065 (Oxygen) RN - 33X04XA5AT (Lactic Acid) SB - IM MH - Animals MH - *Hypoxia/veterinary/genetics MH - *Oxygen/metabolism MH - Fishes/metabolism MH - Cell Hypoxia MH - Lactic Acid MH - Immunity OTO - NOTNLM OT - Hypoxia-reoxygenation OT - Trachinotus blochii OT - Transcriptome COIS- Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2023/03/06 06:00 MHDA- 2023/04/04 06:42 CRDT- 2023/03/05 19:29 PHST- 2022/11/29 00:00 [received] PHST- 2023/02/11 00:00 [revised] PHST- 2023/02/22 00:00 [accepted] PHST- 2023/04/04 06:42 [medline] PHST- 2023/03/06 06:00 [pubmed] PHST- 2023/03/05 19:29 [entrez] AID - S1050-4648(23)00126-2 [pii] AID - 10.1016/j.fsi.2023.108640 [doi] PST - ppublish SO - Fish Shellfish Immunol. 2023 Apr;135:108640. doi: 10.1016/j.fsi.2023.108640. Epub 2023 Mar 5.