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Marco HG, Glendinning S, Ventura T, Gäde G. The gonadotropin-releasing hormone (GnRH) superfamily across Pancrustacea/Tetraconata: A role in metabolism? Mol Cell Endocrinol 2024; 590:112238. [PMID: 38616035 DOI: 10.1016/j.mce.2024.112238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Accepted: 04/05/2024] [Indexed: 04/16/2024]
Affiliation(s)
- Heather G Marco
- Department of Biological Sciences, University of Cape Town, Rondebosch, 7701, South Africa.
| | - Susan Glendinning
- Centre for BioInnovation, University of the Sunshine Coast, Sippy Downs, Queensland, 4556, Australia; School of Science, Technology and Engineering, University of the Sunshine Coast, Sippy Downs, Queensland, 4556, Australia
| | - Tomer Ventura
- Centre for BioInnovation, University of the Sunshine Coast, Sippy Downs, Queensland, 4556, Australia; School of Science, Technology and Engineering, University of the Sunshine Coast, Sippy Downs, Queensland, 4556, Australia
| | - Gerd Gäde
- Department of Biological Sciences, University of Cape Town, Rondebosch, 7701, South Africa
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2
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Tu S, Yu G, Ge F, Xu R, Jin Z, Xie X, Zhu D. Comparative transcriptomic characterization of the ovary in the spawning process of the mud crab Scylla paramamosain. Dev Growth Differ 2024; 66:274-284. [PMID: 38501505 DOI: 10.1111/dgd.12921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 02/11/2024] [Accepted: 02/28/2024] [Indexed: 03/20/2024]
Abstract
Oviposition is induced upon mating in most insects. Spawning is a physiological process that is fundamental for the reproduction of Scylla paramamosain. However, the molecular mechanisms underlying the spawning process in this species are poorly understood. Herein, comprehensive ovary transcriptomic analysis was conducted at the germinal vesicle breakdown stage (GVBD), spawning stage, 0.5 h post-spawning stage, and 24 h post-spawning stage of S. paramamosain for gene discovery. A total of 67,230 unigenes were generated, and 27,975 (41.61%) unigenes were annotated. Meanwhile, the differentially expressed genes (DEGs) between the different groups were identified, and Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis was subsequently conducted. These results suggested that octopamine (OA) and tyramine (TA) could induce oviposition, while dopamine (DA) and serotonin (5-hydroxytryptamine [5-HT]) inhibit oviposition. The 20-hydroxyecdysone (20E) and methyl farnesoate (MF) signal pathways might be positively associated with oviposition. Furthermore, numerous transcripts that encode neuropeptides and their G-protein-coupled receptors (GPCRs), such as CNMamide, RYamide, ecdysis-triggering hormone (ETH), GPA2/GPB5 receptor, and Moody receptor, appear to be differentially expressed during the spawning process. Eleven unigenes were selected for qRT-PCR and the pattern was found to be consistent with the transcriptome expression pattern. Our work is the first spawning-related investigation of S. paramamosain focusing on the ovary at the whole transcriptome level. These findings assist in improving our understanding of spawning regulation in S. paramamosain and provide information for oviposition studies in other crustaceans.
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Affiliation(s)
- Shisheng Tu
- School of Marine Science, Ningbo University, Ningbo, China
| | - Guohong Yu
- School of Marine Science, Ningbo University, Ningbo, China
| | - Fuqiang Ge
- School of Marine Science, Ningbo University, Ningbo, China
| | - Rui Xu
- School of Marine Science, Ningbo University, Ningbo, China
| | - Zhongwen Jin
- Ningbo Ocean and Fisheries Research Institute of Zhejiang Province, Ningbo, China
| | - Xi Xie
- School of Marine Science, Ningbo University, Ningbo, China
| | - Dongfa Zhu
- School of Marine Science, Ningbo University, Ningbo, China
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3
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Knigge T. Antidepressants - The new endocrine disruptors? The case of crustaceans. Mol Cell Endocrinol 2024; 583:112155. [PMID: 38185462 DOI: 10.1016/j.mce.2024.112155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/31/2023] [Accepted: 01/05/2024] [Indexed: 01/09/2024]
Abstract
Antidepressants are high-volume pharmaceuticals that accumulate to concentrations in the μg·L-1 range in surface waters. The release of peptide hormones via neurosecretory cells appears as a natural target for antidepressants. Here I review research that suggests that antidepressants indeed disrupt endocrine signalling in crustaceans, by acting on the synthesis and release of neurohormones, such as crustacean hyperglycaemic hormone, moult inhibiting hormone and pigment dispersing hormone in decapods, as well as methyl farnesoate in Daphnids. Hence, antidepressants can affect hormonal regulation of physiological functions: increase in energy metabolism and activity, lowered ecdysteroid levels, potentially disrupting moult and somatic growth, reducing colour change capacity and compromising camouflage, as well as induction of male sex determination. Several studies further suggest effects of antidepressants on crustacean reproduction, but the hormonal regulation of these effects remains elusive. All things considered, a body of evidence strongly suggests that antidepressants are endocrine disrupting compounds in crustaceans.
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Affiliation(s)
- Thomas Knigge
- Normandie Univ, Unilehavre, FR CNRS 3730 Sciences Appliquées à L'Environnement, UMR-I02, Environmental Stress and Biomonitoring of Aquatic Environments, University of Le Havre Normandy, France.
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4
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Zhou L, Liu Z, Zheng Z, Yao D, Zhao Y, Chen X, Zhang Y, Aweya JJ. The CCR1 and CCR5 C-C chemokine receptors in Penaeus vannamei are annexed by bacteria to attenuate shrimp survival. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2023; 139:104561. [PMID: 36183838 DOI: 10.1016/j.dci.2022.104561] [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: 07/26/2022] [Revised: 09/09/2022] [Accepted: 09/26/2022] [Indexed: 06/16/2023]
Abstract
The C-C chemokine receptors (CCRs) family is involved in diverse pathophysiological processes in mammals, such as immune regulation and cancer, but their functions in invertebrates remain enigmatic. Here, two CCR homologs in Penaeus vannamei (designated PvCCR1 and PvCCR5) were characterized and found to share sequence homology with other CCRs and contain the conserved 7TM functional domain. Both PvCCR1 and PvCCR5 were constitutively expressed in healthy shrimp tissues, while their mRNA transcript levels were induced in hepatopancreas and hemocytes by Vibrio parahaemolyticus, Streptococcus iniae, and white spot syndrome virus. Notably, shrimp survival increased after knockdown of PvCCR1 and PvCCR5 followed by V. parahaemolyticus infection, indicating that PvCCR1 and PvCCR5 are annexed by the bacteria for their benefit, the absence of which attenuates the effects of the pathogen on shrimp survival. The present data indicate that PvCCR1 and PvCCR5 play key roles in the antimicrobial immune response and therefore vital for shrimp survival.
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Affiliation(s)
- Liping Zhou
- Institute of Marine Sciences and Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou, 515063, China
| | - Zhouyan Liu
- Institute of Marine Sciences and Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou, 515063, China
| | - Zhihong Zheng
- Institute of Marine Sciences and Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou, 515063, China
| | - Defu Yao
- Institute of Marine Sciences and Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou, 515063, China
| | - Yongzhen Zhao
- Guangxi Academy of Fishery Sciences, Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Nanning, 530021, China
| | - Xiuli Chen
- Guangxi Academy of Fishery Sciences, Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Nanning, 530021, China
| | - Yueling Zhang
- Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, 511458, China; Institute of Marine Sciences and Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou, 515063, China
| | - Jude Juventus Aweya
- College of Ocean Food and Biological Engineering, Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering, Jimei University, Xiamen, 361021, Fujian, China; Institute of Marine Sciences and Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou, 515063, China.
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5
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Techa S, Thongda W, Bunphimpapha P, Ittarat W, Boonbangyang M, Wilantho A, Ngamphiw C, Pratoomchat B, Nounurai P, Piyapattanakorn S. Isolation and functional identification of secretin family G-protein coupled receptor from Y-organ of the mud crab, Scylla olivacea. Gene X 2023; 848:146900. [DOI: 10.1016/j.gene.2022.146900] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 09/09/2022] [Accepted: 09/13/2022] [Indexed: 12/31/2022] Open
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Kim DH, Park JC, Lee JS. G protein-coupled receptors (GPCRs) in rotifers and cladocerans: Potential applications in ecotoxicology, ecophysiology, comparative endocrinology, and pharmacology. Comp Biochem Physiol C Toxicol Pharmacol 2022; 256:109297. [PMID: 35183764 DOI: 10.1016/j.cbpc.2022.109297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 02/01/2022] [Accepted: 02/12/2022] [Indexed: 12/19/2022]
Abstract
The G protein-coupled receptor (GPCR) superfamily plays a fundamental role in both sensory functions and the regulation of homeostasis, and is highly conserved across the eukaryote taxa. Its functional diversity is related to a conserved seven-transmembrane core and invariant set of intracellular signaling mechanisms. The interplay between these properties is key to the evolutionary success of GPCR. As this superfamily originated from a common ancestor, GPCR genes have evolved via lineage-specific duplications through the process of adaptation. Here we summarized information on GPCR gene families in rotifers and cladocerans based on their evolutionary position in aquatic invertebrates and their potential application in ecotoxicology, ecophysiology, comparative endocrinology, and pharmacology. Phylogenetic analyses were conducted to examine the evolutionary significance of GPCR gene families and to provide structural insight on their role in aquatic invertebrates. In particular, most GPCR gene families have undergone sporadic evolutionary processes, but some GPCRs are highly conserved across species despite the dynamics of GPCR evolution. Overall, this review provides a better understanding of GPCR evolution in aquatic invertebrates and expand our knowledge of the potential application of these receptors in various fields.
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Affiliation(s)
- Duck-Hyun Kim
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Jun Chul Park
- Département des Sciences, Université Sainte-Anne, Church Point, NS B0W 1M0, Canada
| | - Jae-Seong Lee
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea.
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7
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Kim DH, Lee YH, Sayed AEDH, Choi IY, Lee JS. Genome-wide identification of 194 G protein-coupled receptor (GPCR) genes from the water flea Daphnia magna. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. PART D, GENOMICS & PROTEOMICS 2022; 42:100983. [PMID: 35367896 DOI: 10.1016/j.cbd.2022.100983] [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: 03/01/2022] [Revised: 03/22/2022] [Accepted: 03/23/2022] [Indexed: 02/07/2023]
Abstract
In crustaceans, G protein-coupled receptors (GPCRs) are the largest transmembrane receptor family and function by mediating various environmental stimuli in cells. Understanding GPCR signaling is crucial to better understanding of crustacean endocrinology. GPCRs evolved from early eukaryotes, and genome-wide identification of GPCRs in a particular taxon can provide insight into evolutionary tendencies and adaptive strategies of GPCR response to environmental stimuli. Here, we identified 194 full-length GPCR genes in the water flea Daphnia magna that can be divided into five distinct classes (A, B, C, F, and other). A strong orthologous relationship for amine, neuropeptide, and opsin receptors was found in the phylogenetic comparison of D. magna GPCRs to those of humans and two well-known insects (Drosophila melanogaster and Solenopsis invicta). Our results based on phylogenetic relationships suggest that most GPCRs subfamilies have undergone sporadic evolutionary processes for adaptation to environmental pressures. Despite the dynamics of GPCR evolution, some GPCRs are highly conserved between species. This study provides a better understanding of the evolution of GPCRs and expands our knowledge of the potential physiological mechanisms in D. magna in response to various environmental stimuli.
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Affiliation(s)
- Duck-Hyun Kim
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Young Hwan Lee
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Alaa El-Din H Sayed
- Department of Zoology, Faculty of Science, Assiut University, 71516 Assiut, Egypt
| | - Ik-Young Choi
- Department of Agricultural Life Industry, College of Lifelong Learning, Kangwon National University, Chuncheon 24341, South Korea.
| | - Jae-Seong Lee
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea.
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8
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Xue C, Xu K, Jin Y, Bian C, Sun S. Transcriptome Analysis to Study the Molecular Response in the Gill and Hepatopancreas Tissues of Macrobrachium nipponense to Salinity Acclimation. Front Physiol 2022; 13:926885. [PMID: 35694393 PMCID: PMC9176394 DOI: 10.3389/fphys.2022.926885] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Accepted: 05/02/2022] [Indexed: 11/23/2022] Open
Abstract
Macrobrachium nipponense is an economically important prawn species and common in Chinese inland capture fisheries. During aquaculture, M. nipponense can survive under freshwater and low salinity conditions. The molecular mechanism underlying the response to salinity acclimation remains unclear in this species; thus, in this study, we used the Illumina RNA sequencing platform for transcriptome analyses of the gill and hepatopancreas tissues of M. nipponense exposed to salinity stress [0.4‰ (S0, control group), 6‰ (S6, low salinity group), and 12‰ (S12, high salinity group)]. Differentially expressed genes were identified, and several important salinity adaptation-related terms and signaling pathways were found to be enriched, such as “ion transport,” “oxidative phosphorylation,” and “glycometabolism.” Quantitative real-time PCR demonstrated the participation of 12 key genes in osmotic pressure regulation in M. nipponense under acute salinity stress. Further, the role of carbonic anhydrase in response to salinity acclimation was investigated by subjecting the gill tissues of M. nipponense to in situ hybridization. Collectively, the results reported herein enhance our understanding of the mechanisms via which M. nipponense adapts to changes in salinity.
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Affiliation(s)
- Cheng Xue
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Shanghai Ocean University, Ministry of Education, Shanghai, China
- International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, Shanghai, China
| | - Kang Xu
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Shanghai Ocean University, Ministry of Education, Shanghai, China
- International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, Shanghai, China
| | - Yiting Jin
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Shanghai Ocean University, Ministry of Education, Shanghai, China
- International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, Shanghai, China
| | - Chao Bian
- Shenzhen Key Lab of Marine Genomics, Guangdong Provincial Key Lab of Molecular Breeding in Marine Economic Animals, BGI Academy of Marine Sciences, BGI Marine, Shenzhen, China
| | - Shengming Sun
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Shanghai Ocean University, Ministry of Education, Shanghai, China
- International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, Shanghai, China
- *Correspondence: Shengming Sun,
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9
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Wang D, Liu X, Zhang J, Gao B, Liu P, Li J, Meng X. Identification of Neuropeptides Using Long-Read RNA-Seq in the Swimming Crab Portunus trituberculatus, and Their Expression Profile Under Acute Ammonia Stress. Front Physiol 2022; 13:910585. [PMID: 35651875 PMCID: PMC9149262 DOI: 10.3389/fphys.2022.910585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 04/29/2022] [Indexed: 11/17/2022] Open
Affiliation(s)
- Daixia Wang
- Key Laboratory of Aquatic Genomics, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Xiaochen Liu
- Key Laboratory of Aquatic Genomics, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Jingyan Zhang
- Key Laboratory of Aquatic Genomics, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Baoquan Gao
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
- Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
| | - Ping Liu
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
- Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
| | - Jian Li
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
- Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
| | - Xianliang Meng
- Key Laboratory of Aquatic Genomics, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
- *Correspondence: Xianliang Meng,
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Potential receptors in Fenneropenaeus merguiensis ovary and role of saxophone, the bone morphogenetic protein receptor, in ovarian development. Comp Biochem Physiol A Mol Integr Physiol 2022; 266:111141. [PMID: 34990826 DOI: 10.1016/j.cbpa.2021.111141] [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: 10/22/2021] [Revised: 12/26/2021] [Accepted: 12/28/2021] [Indexed: 10/19/2022]
Abstract
Receptors, which play an initial role in signaling pathways in several physiological processes, including reproduction, are among the several molecular factors that control ovarian development in organisms. This study aimed to identify and study receptors potentially involved in controlling the reproductive process of female banana shrimp, Fenneropenaeus merguiensis. Ovarian transcriptomes derived from 4 developmental stages were generated by RNA sequencing. A total of 53,763 transcripts were obtained from the de novo assembled transcriptome, and 663 genes were identified as receptors. Among them, 185 receptors were differentially expressed during ovarian development. Fifteen of these differentially expressed receptors showed distinct expression patterns that were validated by RT-qPCR. Bone morphogenetic protein receptors (BMPR) and their signaling genes were investigated for their roles in shrimp vitellogenesis. The expressions of F. merguiensis saxophone (FmSax), a BMP type I receptor, and BMP type II receptor (FmBMPRII) as well as FmMad, FmMed, and FmSMAD3 were significantly altered during ovarian development. RNA interference was used to investigate the role of FmSax in vitellogenesis. The result indicated that the expression of vitellogenin (Vg) was significantly reduced in both ovary and hepatopancreas of FmSax-knockdown shrimp compared to control shrimp. Furthermore, in FmSax-silencing shrimp, FmBMPRII, FmMad, and FmMed expressions were decreased as well as Vg expression. These findings suggest that FmSax positively regulates Vg synthesis via the BMP signaling pathway.
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Tu S, Xu R, Wang M, Xie X, Bao C, Zhu D. Identification and characterization of expression profiles of neuropeptides and their GPCRs in the swimming crab, Portunus trituberculatus. PeerJ 2021; 9:e12179. [PMID: 34616625 PMCID: PMC8449533 DOI: 10.7717/peerj.12179] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 08/29/2021] [Indexed: 12/16/2022] Open
Abstract
Neuropeptides and their G protein-coupled receptors (GPCRs) regulate multiple physiological processes. Currently, little is known about the identity of native neuropeptides and their receptors in Portunus trituberculatus. This study employed RNA-sequencing and reverse transcription-polymerase chain reaction (RT-PCR) techniques to identify neuropeptides and their receptors that might be involved in regulation of reproductive processes of P. trituberculatus. In the central nervous system transcriptome data, 47 neuropeptide transcripts were identified. In further analyses, the tissue expression profile of 32 putative neuropeptide-encoding transcripts was estimated. Results showed that the 32 transcripts were expressed in the central nervous system and 23 of them were expressed in the ovary. A total of 47 GPCR-encoding transcripts belonging to two classes were identified, including 39 encoding GPCR-A family and eight encoding GPCR-B family. In addition, we assessed the tissue expression profile of 33 GPCRs (27 GPCR-As and six GPCR-Bs) transcripts. These GPCRs were found to be widely expressed in different tissues. Similar to the expression profiles of neuropeptides, 20 of these putative GPCR-encoding transcripts were also detected in the ovary. This is the first study to establish the identify of neuropeptides and their GPCRs in P. trituberculatus, and provide information for further investigations into the effect of neuropeptides on the physiology and behavior of decapod crustaceans.
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Affiliation(s)
- Shisheng Tu
- School of Marine Science, Ningbo University, Ningbo, Zhejiang, China
| | - Rui Xu
- School of Marine Science, Ningbo University, Ningbo, Zhejiang, China
| | - Mengen Wang
- School of Marine Science, Ningbo University, Ningbo, Zhejiang, China
| | - Xi Xie
- School of Marine Science, Ningbo University, Ningbo, Zhejiang, China
| | - Chenchang Bao
- School of Marine Science, Ningbo University, Ningbo, Zhejiang, China
| | - Dongfa Zhu
- School of Marine Science, Ningbo University, Ningbo, Zhejiang, China
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Mykles DL. Signaling Pathways That Regulate the Crustacean Molting Gland. Front Endocrinol (Lausanne) 2021; 12:674711. [PMID: 34234741 PMCID: PMC8256442 DOI: 10.3389/fendo.2021.674711] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 04/28/2021] [Indexed: 12/25/2022] Open
Abstract
A pair of Y-organs (YOs) are the molting glands of decapod crustaceans. They synthesize and secrete steroid molting hormones (ecdysteroids) and their activity is controlled by external and internal signals. The YO transitions through four physiological states over the molt cycle, which are mediated by molt-inhibiting hormone (MIH; basal state), mechanistic Target of Rapamycin Complex 1 (mTORC1; activated state), Transforming Growth Factor-β (TGFβ)/Activin (committed state), and ecdysteroid (repressed state) signaling pathways. MIH, produced in the eyestalk X-organ/sinus gland complex, inhibits the synthesis of ecdysteroids. A model for MIH signaling is organized into a cAMP/Ca2+-dependent triggering phase and a nitric oxide/cGMP-dependent summation phase, which maintains the YO in the basal state during intermolt. A reduction in MIH release triggers YO activation, which requires mTORC1-dependent protein synthesis, followed by mTORC1-dependent gene expression. TGFβ/Activin signaling is required for YO commitment in mid-premolt. The YO transcriptome has 878 unique contigs assigned to 23 KEGG signaling pathways, 478 of which are differentially expressed over the molt cycle. Ninety-nine contigs encode G protein-coupled receptors (GPCRs), 65 of which bind a variety of neuropeptides and biogenic amines. Among these are putative receptors for MIH/crustacean hyperglycemic hormone neuropeptides, corazonin, relaxin, serotonin, octopamine, dopamine, allatostatins, Bursicon, ecdysis-triggering hormone (ETH), CCHamide, FMRFamide, and proctolin. Contigs encoding receptor tyrosine kinase insulin-like receptor, epidermal growth factor (EGF) receptor, and fibroblast growth factor (FGF) receptor and ligands EGF and FGF suggest that the YO is positively regulated by insulin-like peptides and growth factors. Future research should focus on the interactions of signaling pathways that integrate physiological status with environmental cues for molt control.
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Affiliation(s)
- Donald L. Mykles
- Department of Biology, Colorado State University, Fort Collins, CO, United States
- University of California-Davis Bodega Marine Laboratory, Bodega Bay, CA, United States
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