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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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Blanco AM, Soengas JL. Leptin signalling in teleost fish with emphasis in food intake regulation. Mol Cell Endocrinol 2021; 526:111209. [PMID: 33588023 DOI: 10.1016/j.mce.2021.111209] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 01/14/2021] [Accepted: 02/05/2021] [Indexed: 12/13/2022]
Abstract
Leptin, the product of the obese (ob or Lep) gene, was first cloned in teleost fish in 2005, more than a decade after its identification in mammals. This was because bony fish and mammalian leptins share a very low amino acid sequence identity, which suggests different functionality of the leptin system in fish compared to that of mammals. Indeed, major differences are evident between the mammalian and fish leptin system. Thus, for instance, mammalian leptin is synthesized and released by the adipose tissue in response to the amount of fat depots, while several tissues (mainly the liver) are the main sources of leptin in fish, whose determining factors of production are still unclear. In mammals, the main physiological role for leptin is its involvement in the maintenance of energy balance by decreasing food intake and increasing energy expenditure, although a wide variety of actions have been attributed to this hormone (e.g., regulation of lipid and carbohydrate metabolism, reproduction and immune functions). In fish, available literature also points towards a multifunctional nature for leptin, although knowledge on its functions is limited. In this review, we offer an overview of teleostean leptin structure and mechanism of action, and discuss the available knowledge on the role of this hormone in food intake regulation in teleost fish, aiming to provide a comparative overview between the functioning of the teleostean and mammalian leptin systems.
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Affiliation(s)
- Ayelén Melisa Blanco
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidade de Vigo, Vigo, Pontevedra, Spain
| | - José Luis Soengas
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidade de Vigo, Vigo, Pontevedra, Spain.
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Canosa LF, Bertucci JI. Nutrient regulation of somatic growth in teleost fish. The interaction between somatic growth, feeding and metabolism. Mol Cell Endocrinol 2020; 518:111029. [PMID: 32941926 DOI: 10.1016/j.mce.2020.111029] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 07/03/2020] [Accepted: 09/07/2020] [Indexed: 12/13/2022]
Abstract
This review covers the current knowledge on the regulation of the somatic growth axis and its interaction with metabolism and feeding regulation. The main endocrine and neuroendocrine factors regulating both the growth axis and feeding behavior will be briefly summarized. Recently discovered neuropeptides and peptide hormones will be mentioned in relation to feeding control as well as growth hormone regulation. In addition, the influence of nutrient and nutrient sensing mechanisms on growth axis will be highlighted. We expect that in this process gaps of knowledge will be exposed, stimulating future research in those areas.
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Affiliation(s)
- Luis Fabián Canosa
- Instituto Tecnológico de Chascomús (INTECH), CONICET-UNSAM, Chascomús, Buenos Aires, Argentina.
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