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Wu Z, Wu W, Yang S, Cheng F, Lv J, Shao Y, Tang X, Li E, Zhao Q. Safety evaluation and effects of dietary phlorotannins on the growth, health, and intestinal microbiota of Litopenaeus vannamei. FISH & SHELLFISH IMMUNOLOGY 2024; 150:109569. [PMID: 38641216 DOI: 10.1016/j.fsi.2024.109569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 04/03/2024] [Accepted: 04/15/2024] [Indexed: 04/21/2024]
Abstract
Phlorotannins are phenolic compounds with diverse biological activities, yet their efficacy in aquatic animals currently remains unclear. This investigation scrutinized the influence of phlorotannins on the growth, immunity, antioxidant capacity, and intestinal microbiota in Litopenaeus vannamei, concurrently evaluating the potential adverse effects of phlorotannins on L. vannamei. A base diet without phlorotannins supplementation was used as a control, and 4 groups of diets with different concentrations (0, 0.5, 1.0, 2.0 g kg-1) of phlorotannins were formulated and fed to juvenile shrimp (0.25 ± 0.01 g) for 60 days followed by a 24-h challenge with Vibrio parahaemolyticus with triplicate in each group. Compared with the control, dietary 2.0 g kg-1 phlorotannins significantly improved the growth of the shrimp. The activities of enzymes related to cellular immunity, humoral immunity, and antioxidants, along with a notable upregulation in the expression of related genes, significantly increased. After V. parahaemolyticus challenge, the cumulative survival rates of the shrimp demonstrated a positive correlation with elevated concentrations of phlorotannins. In addition, the abundance of Bacteroidetes and functional genes associated with metabolism increased in phlorotannins supplementation groups. Phlorotannins did not elicit any detrimental effects on the biological macromolecules or histological integrity of the hepatopancreas or intestines. Simultaneously, it led to a significant reduction in malondialdehyde content. All results indicated that phlorotannins at concentrations of 2.0 g kg-1 can be used as safe feed additives to promote the growth, stimulate the immune response, improve the antioxidant capacity and intestinal health of L. vannamei, and an protect shrimp from damage caused by oxidative stress.
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Affiliation(s)
- Zijie Wu
- Key Laboratory of Tropical Hydrobiology and Biotechnology of Hainan Province, Hainan Aquaculture Breeding Engineering Research Center, College of Marine Biology and Fisheries, Hainan University, Haikou, Hainan, 570228, China
| | - Wenbo Wu
- Key Laboratory of Tropical Hydrobiology and Biotechnology of Hainan Province, Hainan Aquaculture Breeding Engineering Research Center, College of Marine Biology and Fisheries, Hainan University, Haikou, Hainan, 570228, China
| | - Shouguo Yang
- Hainan Academy of Ocean and Fisheries Sciences, Haikou, Hainan, 571126, China
| | - Fen Cheng
- Hainan Academy of Ocean and Fisheries Sciences, Haikou, Hainan, 571126, China
| | - Jingyi Lv
- Key Laboratory of Tropical Hydrobiology and Biotechnology of Hainan Province, Hainan Aquaculture Breeding Engineering Research Center, College of Marine Biology and Fisheries, Hainan University, Haikou, Hainan, 570228, China
| | - Yingjin Shao
- Key Laboratory of Tropical Hydrobiology and Biotechnology of Hainan Province, Hainan Aquaculture Breeding Engineering Research Center, College of Marine Biology and Fisheries, Hainan University, Haikou, Hainan, 570228, China
| | - Xianming Tang
- Hainan Academy of Ocean and Fisheries Sciences, Haikou, Hainan, 571126, China
| | - Erchao Li
- School of Life Sciences, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
| | - Qun Zhao
- Key Laboratory of Tropical Hydrobiology and Biotechnology of Hainan Province, Hainan Aquaculture Breeding Engineering Research Center, College of Marine Biology and Fisheries, Hainan University, Haikou, Hainan, 570228, China.
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Dewi NR, Huang HT, Wu YS, Liao ZH, Lin YJ, Lee PT, Nan FH. Guava (Psidium guajava) leaf extract enhances immunity, growth, and resistance against Vibrio parahaemolyticus in white shrimp Penaeus vannamei. FISH & SHELLFISH IMMUNOLOGY 2021; 118:1-10. [PMID: 34418559 DOI: 10.1016/j.fsi.2021.08.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 08/17/2021] [Accepted: 08/17/2021] [Indexed: 06/13/2023]
Abstract
This study investigated the effects of guava leaf extract (GLE) on immune responses, growth performance, and resistance to Vibrio parahaemolyticus in white shrimp (Penaeus vannamei). To examine the effect of GLE on the immune response of white shrimps, they were treated with various concentrations of GLE on hemocyte (in vitro) and were orally administered (in vivo) feed containing various concentrations of 0, 1, 5, and 10 g kg-1 GLE (control, GLE1, GLE5, and GLE10, respectively) for 28 days. Furthermore, their growth performance was evaluated for 56 days. In a separate experiment, the shrimps were challenged with V. parahaemolyticus injection after 7 days of culture. In vitro experiments indicated that GLE is nontoxic and can activate immune response. In vivo experiments revealed that the GLE5 led to the highest total hemocyte count, phenoloxidase activity, phagocytic activity, and superoxide anion production and the highest upregulation of lipopolysaccharide, β-1,3-glucan-binding protein, peroxinectin, lysozyme, crustin, penaeidin 2, penaeidin 3, clotting protein, superoxide dismutase, and glutathione peroxidase. Moreover, better growth performance was observed in the GLE groups, with GLE5 exhibiting the highest specific growth rate, weight gain, and feed conversion rate. In addition, GLE5 enhanced resistance to V. parahaemolyticus, with a survival rate of 72.27%. In conclusion, GLE was found to be effective in enhancing nonspecific immune response and growth performance and in reducing V. parahaemolyticus infection in white shrimp.
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Affiliation(s)
- Novi Rosmala Dewi
- Department of Aquaculture, National Taiwan Ocean University, No. 2, Pei-Ning Road, Keelung, 20224, Taiwan, ROC
| | - Huai-Ting Huang
- Department of Aquaculture, National Taiwan Ocean University, No. 2, Pei-Ning Road, Keelung, 20224, Taiwan, ROC
| | - Yu-Sheng Wu
- Department of Aquaculture, National Pingtung University of Science and Technology, No. 1, Xue-Fu Road, Neipu Township Pingtung Country, 912301, Taiwan, ROC
| | - Zhen-Hao Liao
- Department of Aquaculture, National Taiwan Ocean University, No. 2, Pei-Ning Road, Keelung, 20224, Taiwan, ROC
| | - Yu-Ju Lin
- Department of Life Sciences, National Chung Hsing University, No.145, Xing-Da Road, South District, Taichung City, 40227, Taiwan, ROC
| | - Po-Tsang Lee
- Department of Aquaculture, National Taiwan Ocean University, No. 2, Pei-Ning Road, Keelung, 20224, Taiwan, ROC
| | - Fan-Hua Nan
- Department of Aquaculture, National Taiwan Ocean University, No. 2, Pei-Ning Road, Keelung, 20224, Taiwan, ROC.
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