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Aizen J, Sharma S, Elizur A, Joy KP, Chaube R. Regulation of steroid production and key genes in catfish Heteropneustes fossilis using recombinant gonadotropins. FISH PHYSIOLOGY AND BIOCHEMISTRY 2023; 49:911-923. [PMID: 37548828 DOI: 10.1007/s10695-023-01230-4] [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: 05/06/2023] [Accepted: 07/31/2023] [Indexed: 08/08/2023]
Abstract
The two gonadotropins, FSH and LH, stimulate growth and development of the gonads through gonadal biosynthesis of steroid hormones and growth factors. To date, cDNA sequences encoding gonadotropin subunits have been isolated and characterized from a large number of fish species. Recently, we successfully cloned and characterized gonadotropins (LHβ, FSHβ, and GPα) from the pituitary glands of the catfish, Heteropneustes fossilis. In the present study, we describe herein the production of recombinant stinging catfish, H. fossilis (hf) FSH (rhfFSH) and LH (rhfLH) using the methylotrophic yeast P. pastoris expression system. We further explored the hypothesis that the recombinant gonadotropins can modulate the hypothalamus-pituitary-ovarian (HPO) axis genes (avt, it, gnrh2, kiss2, and cyp19a1a) and regulate their transcriptional profile and steroid levels in relation to their annual developmental stage during preparatory and pre-spawning phases under in-vitro conditions. We found that the different concentrations of recombinant rhfFSH and rhfLH significantly stimulated E2 levels in the preparatory and prespawning season, and also upregulated gonadal aromatase gene expression in a dose dependent manner. Our results demonstrate that the yeast expression system produced biologically active recombinant catfish gonadotropins, enabling the study of their function in the catfish.
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Affiliation(s)
- Joseph Aizen
- Faculty of Marine Sciences, Ruppin Academic Center, Michmoret, Israel.
| | - Sandhya Sharma
- Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, India
| | - Abigail Elizur
- Centre for Bioinnovation, University of the Sunshine Coast, Sippy Downs, Queensland, Australia
| | - K P Joy
- Department of Biotechnology, Cochin University of Science and Technology, Kochi, India
| | - Radha Chaube
- Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, India
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Soyano K, Amagai T, Yamaguchi T, Mushirobira Y, Xu WG, Phạm NT, Murata R. Endocrine Regulation of Maturation and Sex Change in Groupers. Cells 2022; 11:cells11050825. [PMID: 35269447 PMCID: PMC8909327 DOI: 10.3390/cells11050825] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 02/13/2022] [Accepted: 02/23/2022] [Indexed: 02/04/2023] Open
Abstract
Groupers are widely distributed in tropical and subtropical areas worldwide, are key species to coastal ecosystems, and valuable fishery targets. To facilitate artificial seed production technology for grouper aquaculture, the mechanisms of reproduction and gonad development are being elucidated for these important species. In addition, since groupers are sexually dimorphic fish with female-first maturity (protogynous hermaphrodite fish), research is being conducted to clarify the ecological mechanism of sex change and their reproductive physiology, focusing on the endocrine system. In recent years, research on groupers has also been conducted to understand changes in the coastal environment caused by ocean warming and man-made chemicals. However, due to difficulties associated with conducting research using wild populations for breeding experiments, knowledge of the physiology and ecology of these fish is lacking, especially their reproductive physiology. In this review, we present information on the reproductive physiology and endocrinology of groupers obtained to date, together with the characteristics of their life history.
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Affiliation(s)
- Kiyoshi Soyano
- Institute for East China Sea Research, Organization for Marine Sciences and Technology, Nagasaki University, 1551-7 Taira-machi, Nagasaki 851-2213, Japan; (T.A.); (Y.M.); (N.T.P.); (R.M.)
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan;
- Correspondence: ; Tel.: +81-95-850-7701; Fax: +81-95-840-1881
| | - Takafumi Amagai
- Institute for East China Sea Research, Organization for Marine Sciences and Technology, Nagasaki University, 1551-7 Taira-machi, Nagasaki 851-2213, Japan; (T.A.); (Y.M.); (N.T.P.); (R.M.)
| | - Tomofumi Yamaguchi
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan;
- Fisheries Technology Institute, Japan Fisheries Research and Education Agency, 148 Fukaiota, Ishigaki, Okinawa 907-0451, Japan
| | - Yuji Mushirobira
- Institute for East China Sea Research, Organization for Marine Sciences and Technology, Nagasaki University, 1551-7 Taira-machi, Nagasaki 851-2213, Japan; (T.A.); (Y.M.); (N.T.P.); (R.M.)
| | - Wen-Gang Xu
- School of Ocean, Yantai University, 30 Qingquan RD, Laishan District, Yantai 264005, China;
| | - Nhan Thành Phạm
- Institute for East China Sea Research, Organization for Marine Sciences and Technology, Nagasaki University, 1551-7 Taira-machi, Nagasaki 851-2213, Japan; (T.A.); (Y.M.); (N.T.P.); (R.M.)
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan;
- College of Aquaculture and Fisheries, Can Tho University, 3/2 Street, Xuan Khanh Ward, Ninh Kieu District, Can Tho City 900000, Vietnam
| | - Ryosuke Murata
- Institute for East China Sea Research, Organization for Marine Sciences and Technology, Nagasaki University, 1551-7 Taira-machi, Nagasaki 851-2213, Japan; (T.A.); (Y.M.); (N.T.P.); (R.M.)
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan;
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