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Hsu LY, Kuo HW, Cheng W. Expression of octopamine/tyramine receptors and immune regulation in Litopenaeus vannamei under acute and chronic thermal stress. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2024; 158:105195. [PMID: 38762098 DOI: 10.1016/j.dci.2024.105195] [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: 04/09/2024] [Revised: 05/06/2024] [Accepted: 05/16/2024] [Indexed: 05/20/2024]
Abstract
This study investigated the impact of hyperthermal (34 °C) and hypothermal (14 °C) stress on the expression of the octopamine/tyramine receptor (LvOA/TA-R) and immune parameters in Litopenaeus vannamei, which is a species critical to the aquaculture industry. Given the sensitivity of aquatic organisms to climate change, understanding the physiological and immune responses of L. vannamei to temperature variations is essential for developing strategies to mitigate adverse effects. This research focuses on the immune response and expression changes of LvOA/TA-R under acute (0.5, 1, and 2 h) and chronic (24, 72, and 168 h) thermal stress conditions. Our findings reveal that thermal stress induces changes in LvOA/TA-R expression and impacts immune responses. Immune parameters such as total haemocyte count, differential haemocyte count, phenoloxidase activity, respiratory bursts, lysozyme activity, clearance efficiency, and phagocytosis exhibited a general trend of significant decline under the stress conditions. LvOA/TA-R had a higher expression in haemocyte under hyperthermal stress. The study elucidated that thermal stress modifies the expression of the LvOA/TA-R and diminishes immune functionality in L. vannamei, underscoring the potential influence of climate change on industry.
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Affiliation(s)
- Li-Yang Hsu
- Department of Aquaculture, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan, ROC
| | - Hsin-Wei Kuo
- General Research Service Center, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan, ROC
| | - Winton Cheng
- Department of Aquaculture, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan, ROC.
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Mo N, Shao S, Yang Y, Bao C, Cui Z. Identifying low salinity adaptation gene expression in the anterior and posterior gills of the mud crab (Scylla paramamosain) by transcriptomic analysis. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. PART D, GENOMICS & PROTEOMICS 2024; 49:101166. [PMID: 38070330 DOI: 10.1016/j.cbd.2023.101166] [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: 08/30/2023] [Revised: 11/04/2023] [Accepted: 11/24/2023] [Indexed: 02/15/2024]
Abstract
In the present study, BGISEQ-500 RNA-Seq technology was adopted to investigate how Scylla paramamosain adapts to salinity tolerance at the molecular level and explores changes in gene expression linked to salinity adaptation following exposure to both low salinity (5 ‰) and standard salinity (23 ‰) conditions. A total of 1100 and 520 differentially expressed genes (DEGs) were identified in the anterior and posterior gills, respectively, and their corresponding expression patterns were visualized in volcano plots and a heatmap. Further analysis highlighted significant enrichment of well-established gene functional categories and signaling pathways, including those what associated with cellular stress response, ion transport, energy metabolism, amino acid metabolism, H2O transport, and physiological stress compensation. We also selected key DEGs within the anterior and posterior gills that encode pivotal stress adaptation and tolerance modulators, including AQP, ABCA1, HSP 10, A35, CAg, NKA, VPA, CAc, and SPS. Interestingly, A35 in the gills might regulate osmolality by binding CHH in response to low salinity stress or serve as a mechanism for energy compensation. Taken together, our findings elucidated the intricate molecular mechanism employed by S. paramamosain for salinity adaptation, which involved distinct gene expression patterns in the anterior and posterior gills. These findings provide the foothold for subsequent investigations into salinity-responsive candidate genes and contribute to a deeper understanding of S. paramamosain's adaptation mechanisms in low-salinity surroundings, which is crucial for the development of low-salinity species cultivation and the establishment of a robust culture model.
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Affiliation(s)
- Nan Mo
- School of Marine Sciences, Ningbo University, Ningbo 315020, China
| | - Shucheng Shao
- School of Marine Sciences, Ningbo University, Ningbo 315020, China
| | - Yanan Yang
- School of Marine Sciences, Ningbo University, Ningbo 315020, China
| | - Chenchang Bao
- School of Marine Sciences, Ningbo University, Ningbo 315020, China
| | - Zhaoxia Cui
- School of Marine Sciences, Ningbo University, Ningbo 315020, China.
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3
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Mo N, Shao S, Zhuang Y, Yang Y, Cui Z, Bao C. Activation and characterization of G protein-coupled receptors for CHHs in the mud crab, Scylla paramamosain. Comp Biochem Physiol A Mol Integr Physiol 2024; 288:111563. [PMID: 38122925 DOI: 10.1016/j.cbpa.2023.111563] [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: 10/16/2023] [Revised: 12/12/2023] [Accepted: 12/13/2023] [Indexed: 12/23/2023]
Abstract
Crustacean hyperglycemic hormone (CHH) superfamily peptides constitute a group of neurohormones, including the crustacean hyperglycemic hormone (CHH), molt-inhibiting hormone (MIH), and gonad-inhibiting hormone (GIH) or vitellogenesis-inhibiting hormone (VIH), which reportedly play an essential role in regulating various biological activities by binding to their receptors in crustaceans. Although bioinformatics analyses have identified G protein-coupled receptors (GPCRs) as potential CHH receptors, no validation through binding experiments has been carried out. This study employed a eukaryotic expression system, HEK293T cell transient transfection, and ligand-receptor interaction tests to identify the GPCRs of CHHs in the mud crab Scylla paramamosain. We found that four GPCRs (Sp-GPCR-A34-A37) were activated by their corresponding CHHs (Sp-CHH1-v1, Sp-MIH, Sp-VIH) in a dose-dependent manner. Of these, Sp-GPCR-A34 was exclusively activated by Sp-VIH; Sp-GPCR-A35 was activated by Sp-CHH1-v1 and Sp-VIH, respectively; Sp-GPCR-A36 was activated by Sp-CHH1-v1 and Sp-MIH; Sp-GPCR-A37 was exclusively activated by Sp-MIH. The half-maximal effective concentration (EC50) values for all CHHs/GPCRs pairs (both Ca2+ and cAMP signaling) were in the nanomolar range. Overall, our study provided hitherto undocumented evidence of the presence of G protein-coupled receptors of CHH in crustaceans, providing the foothold for further studies on the signaling pathways of CHHs and their corresponding GPCRs.
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Affiliation(s)
- Nan Mo
- School of Marine Sciences, Ningbo University, Ningbo 315020, China
| | - Shucheng Shao
- School of Marine Sciences, Ningbo University, Ningbo 315020, China
| | - Yan Zhuang
- School of Marine Sciences, Ningbo University, Ningbo 315020, China
| | - Yanan Yang
- School of Marine Sciences, Ningbo University, Ningbo 315020, China
| | - Zhaoxia Cui
- School of Marine Sciences, Ningbo University, Ningbo 315020, China
| | - Chenchang Bao
- School of Marine Sciences, Ningbo University, Ningbo 315020, China.
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Liu S, Xia J, Tian Y, Yao L, Xu T, Li X, Li X, Wang W, Kong J, Zhang Q. Investigation of Pathogenic Mechanism of Covert Mortality Nodavirus Infection in Penaeus vannamei. Front Microbiol 2022; 13:904358. [PMID: 35711775 PMCID: PMC9195102 DOI: 10.3389/fmicb.2022.904358] [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: 03/25/2022] [Accepted: 04/26/2022] [Indexed: 12/04/2022] Open
Abstract
Viral covert mortality disease (VCMD), also known as running mortality syndrome (RMS), is caused by covert mortality nodavirus (CMNV) and has impacted the shrimp farming industry in Asia and Latin America in recent years. The pathogenic mechanism of CMNV infecting Penaeus vannamei was investigated in this study. In the naturally infected shrimp, histopathological and in situ hybridization (ISH) analysis verified that CMNV infection and severe cellar structural damage occurred in almost all cells of the ommatidium. Under transmission electron microscopic (TEM), vacuolation and necrosis, together with numerous CMNV-like particles, could be observed in the cytoplasm of most cell types of the ommatidium. The challenge test showed that a low CMNV infectious dose caused cumulative mortality of 66.7 ± 6.7% and 33.3 ± 3.6% of shrimp in the 31-day outdoor and indoor farming trials, respectively. The shrimp in the infection group grew slower than those in the control group; the percentage of soft-shell individuals in the infection group (42.9%) was much higher than that of the control group (17.1%). The histopathological and ISH examinations of individuals artificially infected with CMNV revealed that severe cellar damage, including vacuolation, karyopyknosis, and structural failure, occurred not only in the cells of the refraction part of the ommatidium, but also in the cells of the nerve enrichment and hormone secretion zones. And the pathological damages were severe in the nerve cells of both the ventral nerve cord and segmental nerve of the pleopods. TEM examination revealed the ultrastructural pathological changes and vast amounts of CMNV-like particles in the above-mentioned tissues. The differential transcriptome analysis showed that the CMNV infection resulted in the significant down-regulated expression of genes of photo-transduction, digestion, absorption, and growth hormones, which might be the reason for the slow growth of shrimp infected by CMNV. This study uncovered unique characteristics of neurotropism of CMNV for the first time and explored the pathogenesis of slow growth and shell softening of P. vannamei caused by CMNV infection.
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Affiliation(s)
- Shuang Liu
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Qingdao, China
- Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, National Laboratory for Marine Science and Technology, Qingdao, China
| | - Jitao Xia
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Qingdao, China
- Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity, Qingdao, China
| | - Yuan Tian
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Qingdao, China
- Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity, Qingdao, China
| | - Liang Yao
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Qingdao, China
- Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity, Qingdao, China
| | - Tingting Xu
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Qingdao, China
- Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, National Laboratory for Marine Science and Technology, Qingdao, China
| | - Xupeng Li
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Qingdao, China
- Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity, Qingdao, China
| | - Xiaoping Li
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Qingdao, China
- Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, National Laboratory for Marine Science and Technology, Qingdao, China
| | - Wei Wang
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Qingdao, China
- Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity, Qingdao, China
| | - Jie Kong
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Qingdao, China
- Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, National Laboratory for Marine Science and Technology, Qingdao, China
| | - Qingli Zhang
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Qingdao, China
- Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, National Laboratory for Marine Science and Technology, Qingdao, China
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Guo L, Zhou M, Chen D, Yi C, Sun B, Wang S, Ru Y, Chen H, Wang H. A new insight to characterize immunomodulation based on hepatopancreatic transcriptome and humoral immune factor analysis of the Cherax quadricarinatus infected with Aeromonas veronii. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 219:112347. [PMID: 34044307 DOI: 10.1016/j.ecoenv.2021.112347] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 05/11/2021] [Accepted: 05/12/2021] [Indexed: 06/12/2023]
Abstract
Cherax quadricarinatus is a type of large freshwater crayfish that is characterized by rapid growth and formidable adaptability. It has also been widely cultured and studied as a model organism. Aeromonas veronii is the dominant pathogen in aquatic environments and the primary threat to aquaculture's economic stability. To better understand the interactions between C. quadricarinatus and A. veronii, high-throughput RNA sequencing of the C. quadricarinatus hepatopancreas was carried out on a control group, susceptible group (6 h after infection), and resistant group (48 h after infection). A total of 65,850,929 genes were obtained. Compared with the control group, 2616 genes were up-regulated and 1551 genes were down-regulated in the susceptible group; while 1488 genes were up-regulated and 1712 genes were down-regulated in the resistant group. GO and KEGG analysis showed that these differentially expressed genes (DEGs) were associated with multiple immune pathways, including Toll-like receptors (TLRs), antigen processing and presentation, NOD-like receptor signaling pathway, phagosome, lysosome, JAK-STAT signaling pathway. qRT-PCR showed that infection by A. veronii changed the expression pattern of the serine proteinase inhibitor (SPI), crustacean hyperglycemic hormone (CHH), anti-lipopolysaccharide factor (ALF), and extracellular copper/zinc superoxide dismutase (SOD1), all of which were significantly higher than in the control group up to 48 h after infection. In addition, detection of superoxide dismutase (SOD), catalase (CAT), lysozyme (LZM), and phenoloxidase (PO) activity, as well as ceruloplasmin (CP) concentration at different times after infection showed diverse trends. Furthermore, pathological sections obtained 24 h after infection show lesions on the hepatopancreas and intestinal tissues caused by A. veronii. The results of this study provide a foundation for analyzing the immune mechanism of C. quadricarinatus infected with A. veronii at the transcriptional level and a theoretical basis for screening disease-resistant individuals to ensure healthy economic development of the aquatic industry.
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Affiliation(s)
- Leifeng Guo
- Aquaculture Research Lab, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian 271018, China
| | - Min Zhou
- Aquaculture Research Lab, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian 271018, China
| | - Duanduan Chen
- Aquaculture Research Lab, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian 271018, China
| | - Cao Yi
- Aquaculture Research Lab, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian 271018, China
| | - Bing Sun
- College of Fisheries, Key Lab of Agricultural Animal Genetics, Breeding, and Reproduction of Ministry of Education/Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, No. 1 Shizishan Street, Hongshan District, Wuhan 430070, Hubei, China
| | - Shouquan Wang
- Aquaculture Research Lab, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian 271018, China
| | - Yuanyuan Ru
- Aquaculture Research Lab, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian 271018, China
| | - Hongju Chen
- Aquaculture Research Lab, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian 271018, China.
| | - Hui Wang
- Aquaculture Research Lab, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian 271018, China.
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Laphyai P, Kruangkum T, Chotwiwatthanakun C, Semchuchot W, Thaijongrak P, Sobhon P, Tsai PS, Vanichviriyakit R. Suppression of a Novel Vitellogenesis-Inhibiting Hormone Significantly Increases Ovarian Vitellogenesis in the Black Tiger Shrimp, Penaeus monodon. Front Endocrinol (Lausanne) 2021; 12:760538. [PMID: 34867802 PMCID: PMC8634883 DOI: 10.3389/fendo.2021.760538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 10/12/2021] [Indexed: 11/13/2022] Open
Abstract
In this study, a novel Crustacean Hyperglycemic Hormone-type II gene (CHH-type II) was identified and biologically characterized in a shrimp, Penaeus monodon. Based on its structure and function, this gene was named P. monodon vitellogenesis-inhibiting hormone (PemVIH). The complete cDNA sequence of PemVIH consisted of 1,022 nt with an open reading frame (ORF) of 339 nt encoding a polypeptide of 112 amino acids. It was classified as a member of the CHH-type II family based on conserved cysteine residues, a characteristically positioned glycine residue, and the absence of CHH precursor-related peptide (CPRP) domain. The deduced mature PemVIH shared the highest sequence similarities with giant river prawn sinus gland peptide A. Unlike P. monodon gonad-inhibiting hormone (PemGIH), PemVIH was expressed only in the brain and ventral nerve cord, but not the eyestalks. Whole mount immunofluorescence using a newly generated PemVIH antiserum detected positive signals in neuronal cluster 9/11 and 17 of the brain, commissural ganglion (CoG), and neuronal clusters of ventral nerve cord. The presence of PemVIH-positive neurons in CoG, a part of stomatogastric nervous system, suggested a potential mechanism for crosstalk between nutritional and reproductive signaling. The role of PemVIH in vitellogenesis was evaluated using RNA interference technique. Temporal knockdown of PemVIH in female subadults resulted in a 3-fold increase in ovarian vitellogenin expression, suggesting an inhibitory role of PemVIH in vitellogenesis. This study provided novel insight into the control of vitellogenesis and additional strategies for improving ovarian maturation in P. monodon without the current harmful practice of eyestalk ablation.
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Affiliation(s)
- Phaivit Laphyai
- Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp), Faculty of Science, Mahidol University, Bangkok, Thailand
- Department of Anatomy, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Thanapong Kruangkum
- Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp), Faculty of Science, Mahidol University, Bangkok, Thailand
- Department of Anatomy, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Charoonroj Chotwiwatthanakun
- Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp), Faculty of Science, Mahidol University, Bangkok, Thailand
- Academic and Curriculum Division, Nakhonsawan Campus, Mahidol University, Nakhonsawan, Thailand
| | - Wanita Semchuchot
- Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp), Faculty of Science, Mahidol University, Bangkok, Thailand
- Department of Science, Faculty of Science and Technology, Prince of Songkla University, Pattani, Thailand
| | - Prawporn Thaijongrak
- Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp), Faculty of Science, Mahidol University, Bangkok, Thailand
- Department of Clinical Sciences and Public Health, Faculty of Veterinary Science, Mahidol University, Nakhonpathom, Thailand
| | - Prasert Sobhon
- Department of Anatomy, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Pei-San Tsai
- Department of Integrative Physiology, University of Colorado, Boulder, CO, United States
| | - Rapeepun Vanichviriyakit
- Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp), Faculty of Science, Mahidol University, Bangkok, Thailand
- Department of Anatomy, Faculty of Science, Mahidol University, Bangkok, Thailand
- *Correspondence: Rapeepun Vanichviriyakit,
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Transcriptome analyses reveal the synergistic effects of feeding and eyestalk ablation on ovarian maturation in black tiger shrimp. Sci Rep 2020; 10:3239. [PMID: 32094422 PMCID: PMC7040003 DOI: 10.1038/s41598-020-60192-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 02/03/2020] [Indexed: 01/23/2023] Open
Abstract
Unilateral eyestalk ablation in the female black tiger shrimp Penaeus monodon is commonly employed to induce ovarian maturation. However, the importance of complementing this practice with the provision of live feed supplement (such as polychaetes) has not been emphasized in previous studies. Indeed, it has been less emphasized that female broodstock must be fed with live feeds such as polychaetes for this practice to be effective. While the effects of eyestalk ablation have been thoroughly studied in various aspects, the synergistic effects of feeding with live feeds and the ablation have never been elucidated at a transcriptome-wide level. With recent advances in the next-generation sequencing platforms, it is now possible to investigate the effects of eyestalk ablation and live feeds at the transcriptomic levels. This study employed both short-read Illumina RNA sequencing and long-read Pacific Biosciences (PacBio) isoform sequencing (Iso-seq) to generate the first high-quality ovarian reference transcriptome in P. monodon. This novel assembly allowed us to dissect the effects of feeds and eyestalk ablation and reveal their synergistic effects at the transcriptomic level through the regulation of important genes involved in fatty acid regulation, energy production, and hormone-mediated oocyte maturation pathways. The synergistic effects between the polychaete feeding and the eyestalk ablation in the process of ovarian maturation in black tiger shrimp suggest that without having proper nutrients from the polychaetes, female broodstock might not be ready to develop its ovary. However, even with proper nutrients, the eyestalk ablation is still necessary to perhaps manipulate the female endocrine of the black tiger shrimp. These findings shed the light on molecular mechanisms and key molecular pathways that lead to successful ovarian maturation.
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Analysis of the circadian transcriptome of the Antarctic krill Euphausia superba. Sci Rep 2019; 9:13894. [PMID: 31554872 PMCID: PMC6761102 DOI: 10.1038/s41598-019-50282-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 09/10/2019] [Indexed: 11/09/2022] Open
Abstract
Antarctic krill (Euphausia superba) is a high latitude pelagic organism which plays a central role in the Southern Ocean ecosystem. E. superba shows daily and seasonal rhythms in physiology and behaviour, which are synchronized with the environmental cycles of its habitat. Recently, the main components of the krill circadian machinery have been identified and characterized. However, the exact mechanisms through which the endogenous timing system operates the control and regulation of the overt rhythms remains only partially understood. Here we investigate the involvement of the circadian clock in the temporal orchestration of gene expression by using a newly developed version of a krill microarray platform. The analysis of transcriptome data from krill exposed to both light-dark cycles (LD 18:6) and constant darkness (DD), has led to the identification of 1,564 putative clock-controlled genes. A remarkably large proportion of such genes, including several clock components (clock, period, cry2, vrille, and slimb), show oscillatory expression patterns in DD, with a periodicity shorter than 24 hours. Energy-storage pathways appear to be regulated by the endogenous clock in accordance with their ecological relevance in daily energy managing and overwintering. Our results provide the first representation of the krill circadian transcriptome under laboratory, free-running conditions.
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Pang YY, Zhang C, Xu MJ, Huang GY, Cheng YX, Yang XZ. The transcriptome sequencing and functional analysis of eyestalk ganglions in Chinese mitten crab (Eriocheir sinensis) treated with different photoperiods. PLoS One 2019; 14:e0210414. [PMID: 30645610 PMCID: PMC6333377 DOI: 10.1371/journal.pone.0210414] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 12/21/2018] [Indexed: 12/31/2022] Open
Abstract
Photoperiod plays an important role in individual growth, development, and metabolism in crustaceans. The growth and reproduction of crabs are closely related to the photoperiod. However, as of yet, there are still no transcriptomic reports of eyestalk ganglions treated under different photoperiods in the Chinese mitten crab (Eriocheir sinensis), which is a benthonic crab with high commercial value in Asia. In this study, we collected the eyestalk ganglions of crabs that were reared under different photoperiods, including a control group (L: D = 12 h: 12 h, named CC), a constant light group (L: D = 24 h: 0 h, named LL) and a constant darkness group (L: D = 0 h: 24 h, named DD). RNA sequencing was performed on these tissues in order to examine the effects of different photoperiods. The total numbers of clean reads from the CC, LL and DD groups were 48,772,584 bp, 53,943,281 bp and 53,815,178 bp, respectively. After de novo assembly, 161,380 unigenes were obtained and were matched with different databases. The DEGs were significantly enriched in phototransduction and energy metabolism pathways. Results from RT-qPCR showed that TRP channel protein (TRP) in the phototransduction pathway had a significantly higher level of expression in LL and DD groups than in the CC group. We found that the downregulation of the pyruvate dehydrogenase complex (PDC) gene and the upregulation phosphoenolpyruvate carboxykinase (PPC) gene were involved in energy metabolism processes in LL or DD. In addition, we also found that the upregulation of the expression level of the genes Gαq, pyruvate kinase (PK), NADH peroxidase (NADH) and ATPase is involved in phototransduction and energy metabolism. These results may shed some light on the molecular mechanism underlying the effect of photoperiod in physiological activity of E. sinensis.
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Affiliation(s)
- Yang-yang Pang
- National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China
- Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai, China
| | - Cong Zhang
- National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China
- Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai, China
| | - Min-jie Xu
- National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China
- Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai, China
| | - Gen-yong Huang
- National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China
- Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai, China
| | - Yong-xu Cheng
- National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China
- Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai, China
- * E-mail: (XZY); (YXC)
| | - Xiao-zhen Yang
- National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China
- Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai, China
- * E-mail: (XZY); (YXC)
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Qiao H, Jiang F, Xiong Y, Jiang S, Fu H, Li F, Zhang W, Sun S, Jin S, Gong Y, Wu Y. Characterization, expression patterns of molt-inhibiting hormone gene of Macrobrachium nipponense and its roles in molting and growth. PLoS One 2018; 13:e0198861. [PMID: 29889902 PMCID: PMC5995357 DOI: 10.1371/journal.pone.0198861] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 05/25/2018] [Indexed: 11/18/2022] Open
Abstract
The oriental river prawn, Macrobrachium nipponense, is an important commercial aquaculture resource in China. In order to overwinter, M. nipponense displays decreased physiological activity and less consumption of energy. Sudden warming would trigger molting and cause an extensive death, resulting in huge economic losses. Therefore, it is of great practical significance to study the molting mechanism of oriental river prawns. Molt-inhibiting hormone gene (MIH) plays a major role in regulating molting in crustaceans. In this study, a full length MIH cDNA of M. nipponense (Mn-MIH) was cloned from the eyestalk. The total length of the Mn-MIH was 925 bp, encoding a protein of 119 amino acids. Tissue distribution analysis showed that Mn-MIH was highly expressed in the eyestalk, and that it had relatively low expression in gill, ovary, and abdominal ganglion. Mn-MIH was detected in all developmental stages, and changed regularly in line with the molting cycle of the embryo and larva. Mn-MIH varied in response to the molting cycle, suggesting that Mn-MIH negatively regulates ecdysteroidogenesis. Mn-MIH inhibition by RNAi resulted in a significant acceleration of molting cycles in both males and females, confirming the inhibitory role of MIH in molting. After long-term RNAi males, but not females had significant weight gain, confirming that Mn-MIH plays an important role in growth of M. nipponense. Our work contributes to a better understanding of the role of Mn-MIH in crustacean molting and growth.
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Affiliation(s)
- Hui Qiao
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, China
| | - Fengwei Jiang
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, China
| | - Yiwei Xiong
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, China
| | - Sufei Jiang
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, China
| | - Hongtuo Fu
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, China
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, China
| | - Fei Li
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, China
| | - Wenyi Zhang
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, China
| | - Shengming Sun
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, China
| | - Shubo Jin
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, China
| | - Yongsheng Gong
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, China
| | - Yan Wu
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, China
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