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Huang Y, Ge R, Lou G, Jiang N, Zhu X, Guo Y, Liu H, Liu X, Chen X. The influence of dietary Coenzyme Q10 on growth performance, antioxidant capacity and resistance against Aeromonas hydrophila of juvenile European eel (Anguilla anguilla). FISH & SHELLFISH IMMUNOLOGY 2023; 138:108834. [PMID: 37207885 DOI: 10.1016/j.fsi.2023.108834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 05/08/2023] [Accepted: 05/16/2023] [Indexed: 05/21/2023]
Abstract
The present study was conducted to investigate the effects of dietary Coenzyme Q10 (CoQ10) on the growth performance, body composition, digestive enzyme activity, antioxidant capacity, intestinal histology, immune-antioxidant gene expression and disease resistance of juvenile European eel (Anguilla anguilla). Fish were fed a diet supplemented with CoQ10 at concentrations of 0, 40, 80 and 120 mg/kg for 56 days. The results indicated that dietary CoQ10 supplementation did not significantly affect final body weight (FBW), survival rate (SR), weight gain (WG), feed rate (FR), viscerosomatic index (VSI) or hepatosomatic index (HSI) among all experimental groups. However, the highest FBW, WG and SR were found in the 120 mg/kg CoQ10 group. Dietary 120 mg/kg CoQ10 markedly improved feed efficiency (FE) and the protein efficiency ratio (PER). The crude lipids in the body and triglycerides (TG) and total cholesterol (TC) in serum were obviously lower in the 120 mg/kg CoQ10 group than in the control group. For digestive enzymes, protease activity in the intestine was markedly boosted in the 120 mg/kg CoQ10 group. The serum activities of SOD, CAT and GST in the 120 mg/kg CoQ10 group were significantly higher than those in the control group. Dietary 120 mg/kg CoQ10 efficiently enhanced superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) and glutathione S-transferase (GST) activities in the liver, while the malondialdehyde (MDA) content was significantly decreased. No significant histological changes in the liver were identified in any group. Dietary supplementation with 120 mg/kg CoQ10 improved antioxidant capacity and immunity by upregulating the expression of cyp1a, sod, gst, lysC, igma1, igmb1 and irf3 in the liver. Furthermore, the cumulative survival rate of juvenile European eel against challenge with Aeromonas hydrophila was significantly elevated in the 80 and 120 mg/kg CoQ10 supplemented groups. Conclusively, our study suggested that supplementing the diet of juvenile European eel with CoQ10 at a concentration of 120 mg/kg could promote their feed utilization, fat reduction, antioxidant capacity, digestibility, immune-antioxidant gene expression and resistance to Aeromonas hydrophila without negative effects on fish health status.
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Affiliation(s)
- Ying Huang
- Key Laboratory of Marine Biotechnology of Fujian Province, College of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Ruxiang Ge
- Key Laboratory of Marine Biotechnology of Fujian Province, College of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Gege Lou
- Key Laboratory of Marine Biotechnology of Fujian Province, College of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Nengzuo Jiang
- Fujian Institute of Testing Technology, Fuzhou, 350003, China
| | - Xiaoming Zhu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Yazhe Guo
- Key Laboratory of Marine Biotechnology of Fujian Province, College of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Haokun Liu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Xuanyu Liu
- Key Laboratory of Marine Biotechnology of Fujian Province, College of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Xinhua Chen
- Key Laboratory of Marine Biotechnology of Fujian Province, College of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China.
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