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Thongbuakaew T, Mukem S, Chaiyamoon A, Khornchatri K, Kruangkum T, Cummins SF, Sobhon P. Characterization, expression, and function of the pyrokinins (PKs) in the giant freshwater prawn, Macrobrachium rosenbergii. J Exp Biol 2022; 225:275663. [PMID: 35578905 DOI: 10.1242/jeb.243742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 05/11/2022] [Indexed: 11/20/2022]
Abstract
Pyrokinins (PKs) are neuropeptides that have been found to regulate a variety of physiological activities including reproduction in various insect and crustacean species. However, the reproductive roles of PKs in the giant freshwater prawn have not yet been investigated. In this study, we identified the MroPK gene from next-generation sequence resources, which encodes a MroPK precursor that shares a high degree of conservation with the C-terminal sequence of FxPRLamide in other arthropods. MroPK is expressed within most tissues, except the hepatopancreas, stomach, and gill. Within developing ovarian tissue, MroPK expression was found to be significantly higher during the early stages (stages 1-2) compared with the late stages (stages 3-4), and could be localized to the oogonia, previtellogenic, and early vitellogenic oocytes. A role for PK in M. rosenbergii reproduction was supported following experimental administration of MroPK to ovarian explant cultures, showing an increase in the productions of progesterone and estradiol and upregulation of steroidogenesis-related genes (3β-HSD and 17β-HSD) and vitellogenin (Vg) expressions. Together, these results support a role for MroPK in regulating ovarian maturation via steroidogenesis.
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Affiliation(s)
| | - Sirirak Mukem
- School of Medicine, Walailak University, Nakhon Si Thammarat 80160, Thailand
| | - Arada Chaiyamoon
- Department of Anatomy, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Kanjana Khornchatri
- Chulabhorn International College of Medicine, Thammasat University, Pathumthani 12121, Thailand
| | - Thanapong Kruangkum
- Department of Anatomy, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Scott F Cummins
- Genecology Research Centre, School of Science and Engineering, University of the Sunshine Coast, Sippy Downs, Queensland 4556, Australia
| | - Prasert Sobhon
- Department of Anatomy, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
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Jayasankar V, Tomy S, Wilder MN. Insights on Molecular Mechanisms of Ovarian Development in Decapod Crustacea: Focus on Vitellogenesis-Stimulating Factors and Pathways. Front Endocrinol (Lausanne) 2020; 11:577925. [PMID: 33123094 PMCID: PMC7573297 DOI: 10.3389/fendo.2020.577925] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 08/18/2020] [Indexed: 01/20/2023] Open
Abstract
Vitellogenesis in crustaceans is an energy-consuming process. Though the underlying mechanisms of ovarian maturation in decapod Crustacea are still unclear, evidence indicates the process to be regulated by antagonistically-acting inhibitory and stimulating factors specifically originating from X-organ/sinus gland (XO/SG) complex. Among the reported neuromediators, neuropeptides belonging to the crustacean hyperglycemic hormone (CHH)-family have been studied extensively. The structure and dynamics of inhibitory action of vitellogenesis-inhibiting hormone (VIH) on vitellogenesis have been demonstrated in several species. Similarly, the stimulatory effects of other neuropeptides of the CHH-family on crustacean vitellogenesis have also been validated. Advancement in transcriptomic sequencing and comparative genome analysis has led to the discovery of a large number of neuromediators, peptides, and putative peptide receptors having pleiotropic and novel functions in decapod reproduction. Furthermore, differing research strategies have indicated that neurotransmitters and steroid hormones play an integrative role by stimulating neuropeptide secretion, thus demonstrating the complex intertwining of regulatory factors in reproduction. However, the molecular mechanisms by which the combinatorial effect of eyestalk hormones, neuromediators and other factors coordinate to regulate ovarian maturation remain elusive. These multifunctional substances are speculated to control ovarian maturation possibly via the autocrine/paracrine pathway by acting directly on the gonads or by indirectly exerting their stimulatory effects by triggering the release of a putative gonad stimulating factor from the thoracic ganglion. Acting through receptors, they possibly affect levels of cyclic nucleotides (cAMP and cGMP) and Ca2+ in target tissues leading to the regulation of vitellogenesis. The "stimulatory paradox" effect of eyestalk ablation on ovarian maturation continues to be exploited in commercial aquaculture operations, and is outweighed by the detrimental physiological effects of this procedure. In this regard, the development of efficient alternatives to eyestalk ablation based on scientific knowledge is a necessity. In this article, we focus principally on the signaling pathways of positive neuromediators and other factors regulating crustacean reproduction, providing an overview of their proposed receptor-mediated stimulatory mechanisms, intracellular signaling, and probable interaction with other hormonal signals. Finally, we provide insight into future research directions on crustacean reproduction as well as potential applications of such research to aquaculture technology development.
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Affiliation(s)
- Vidya Jayasankar
- Marine Biotechnology Division, Madras Research Centre, ICAR-Central Marine Fisheries Research Institute, Chennai, India
| | - Sherly Tomy
- Genetics and Biotechnology Unit, ICAR-Central Institute of Brackishwater Aquaculture, Chennai, India
| | - Marcy N. Wilder
- Fisheries Division, Japan International Research Center for Agricultural Sciences, Tsukuba, Japan
- *Correspondence: Marcy N. Wilder
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Harlıoğlu MM, Yonar ME, Harlıoğlu AG, Yonar SM, Farhadi A. Effects of different methods and times of 17β-estradiol treatment on the feminization success in the narrow-clawed crayfish Astacus leptodactylus (Eschscholtz, 1823). INVERTEBR REPROD DEV 2017. [DOI: 10.1080/07924259.2017.1340353] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Thongbuakaew T, Siangcham T, Suwansa-ard S, Elizur A, Cummins SF, Sobhon P, Sretarugsa P. Steroids and genes related to steroid biosynthesis in the female giant freshwater prawn, Macrobrachium rosenbergii. Steroids 2016; 107:149-60. [PMID: 26774430 DOI: 10.1016/j.steroids.2016.01.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 12/24/2015] [Accepted: 01/11/2016] [Indexed: 12/01/2022]
Abstract
The giant freshwater prawn, Macrobrachium rosenbergii, is important to many Asian countries due to its high economic value as an aquaculture product. With demand increasing, there is requirement for a better understanding of the biosynthetic components that regulate its growth and reproduction, including steroids, in order to help increase production. Vertebrate-type steroids and their receptors were identified in crustaceans and implicated in reproduction. In this study, we presented the sex steroids estradiol and progesterone by LC-MS/MS in female M. rosenbergii, and reveal steroidogenic-related genes by in silico analysis of de novo assembled transcriptomes. Comparative analysis with other species was performed to confirm their putative role, as well as tissue-specific and quantitative gene expression. We reveal 29 transcripts that encode for steroidogenic-related proteins, including steroidogenic enzymes, a nuclear steroid hormone receptors, and a steroidogenic factor. Moreover, we identified for the first time the presence of steroidogenic factor 1, StAR-related lipid transfer protein, estradiol receptor- and progesterone-like protein in M. rosenbergii. Those targeted for gene expression analysis (3 beta-hydroxysteroid dehydrogenase, 17 beta-hydroxysteroid dehydrogenase, estrogen sulfotransferase and progesterone receptor-like) showed widespread expression within many tissues, and at relatively high levels in the central nervous system (CNS) during ovarian maturation. In summary, we provide further evidence for the existence of steroidogenic pathways in crustaceans, which may be useful for advancing prawn aquaculture.
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Affiliation(s)
- Tipsuda Thongbuakaew
- Department of Anatomy, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Tanapan Siangcham
- Department of Anatomy, Faculty of Science, Mahidol University, Bangkok 10400, Thailand; Faculty of Allied Health Sciences, Burapha University, Chonburi 20131, Thailand
| | - Saowaros Suwansa-ard
- Department of Anatomy, Faculty of Science, Mahidol University, Bangkok 10400, Thailand; Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Sippy Downs, Queensland 4558, Australia
| | - Abigail Elizur
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Sippy Downs, Queensland 4558, Australia
| | - Scott F Cummins
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Sippy Downs, Queensland 4558, Australia
| | - Prasert Sobhon
- Department of Anatomy, Faculty of Science, Mahidol University, Bangkok 10400, Thailand; Faculty of Allied Health Sciences, Burapha University, Chonburi 20131, Thailand
| | - Prapee Sretarugsa
- Department of Anatomy, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
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