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Li WX, Cai LT, Huang YP, Huang YQ, Pan SH, Liu ZL, Ndandala CB, Shi G, Deng SP, Shi HJ, Li GL, Jiang DN. Sequence identification and expression characterization of leptin in the spotted scat, Scatophagus argus. Comp Biochem Physiol B Biochem Mol Biol 2024; 269:110882. [PMID: 37562672 DOI: 10.1016/j.cbpb.2023.110882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 08/06/2023] [Accepted: 08/07/2023] [Indexed: 08/12/2023]
Abstract
Scatophagus argus is an important marine culture fish in South and South-East Asia, including Southeast coastal areas of China. Artificial propagation technology for S. argus is not optimum; thus further studies on its reproduction biology are required. Although previous studies have shown that leptin (Lep) can regulate fish reproduction, the role of lep genes in S. argus is unknown. Herein, in silico analysis showed that S. argus has two lep genes (lepa and lepb). Protein 3D-structure prediction showed that Lepa has four α-helices (similar to mammals), while Lepb only has three. Tissue distribution analysis showed that lepa is highly expressed in the liver, whereas lepb was not detected in any tissue. Notably, lepr was expressed in all tissues. Lepa mRNA expression levels in the liver and serum Lep, estradiol (E2) and vitellogenin (Vtg) levels of female fish were significantly higher in ovaries at stage IV than in ovaries at stage II. Serum E2 levels were significantly positively correlated with Vtg levels in female fish at different development stages, while serum E2 was not correlated with Lep levels. Consistently, in vitro incubation of the liver with E2 significantly up-regulated vtga, while it did not affect lepa expression. Recombinant Lep (10 nM) significantly up-regulated chicken gonadotropin-releasing hormone (cGnRH/GnRH-II) in the hypothalamus and GnRH receptor (GnRHR) and luteinizing hormone beta (Lhb) in the pituitary. These results suggest that lepa regulates female reproduction in S. argus.
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Affiliation(s)
- Wan-Xin Li
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China
| | - Li-Ting Cai
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China
| | - Yan-Ping Huang
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China
| | - Yuan-Qing Huang
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China
| | - Shu-Hui Pan
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China
| | - Zhi-Long Liu
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China
| | - Charles Brighton Ndandala
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China
| | - Gang Shi
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China
| | - Si-Ping Deng
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China
| | - Hong-Juan Shi
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China
| | - Guang-Li Li
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China
| | - Dong-Neng Jiang
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China.
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Different Types of Non-Starch Polysaccharides Alter the Growth, Intestinal Flora and Serum Metabolite Profile of Grass Carp, Ctenopharyngodon idella. Metabolites 2022; 12:metabo12101003. [PMID: 36295905 PMCID: PMC9609856 DOI: 10.3390/metabo12101003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 10/18/2022] [Accepted: 10/19/2022] [Indexed: 11/29/2022] Open
Abstract
Dietary non-starch polysaccharides (NSPs) broadly influence fish intestinal flora and physiological metabolism, but limited information is available on grass carp (Ctenopharyngodon idella). This study investigated the effects of different types of NSPs on the growth, nutrient metabolism status, gut microbiota, and serum metabolome of grass carp. Fish were fed with diets containing 4.4% insoluble NSPs (INSP), 9.24% soluble NSPs (SNSP), 13.64% NSPs (4.4% INSP + 9.24% SNSP, NSP) and non NSPs (FM), respectively, for 9 weeks. Results showed that dietary SNSP decreased protein efficiency ratio and serum protein content, but increased feed coefficient ratio, feed intake, plasma blood urea nitrogen content, and plasma aspartate aminotransferase activity (AST); conversely, dietary INSP decreased plasma AST activity. Dietary INSP and SNSP increased serum free cholesterol content. Dietary NSPs altered the abundance of dominant bacteria and serum metabolite profiles. The differential metabolites between groups were significantly enriched in amino acid synthesis and metabolic pathways. In conclusion, dietary INSP exhibited a growth-promoting effect compared to SNSP. Dietary INSP is beneficial for improving nutrient metabolism and intestinal health. Moreover, dietary NSPs may regulate the physiological metabolism and feeding behavior of grass carp by altering amino acid synthesis and metabolism.
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