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Hao T, Song Z, Zhang M, Zhang L. Signaling Transduction Pathways and G-Protein-Coupled Receptors in Different Stages of the Embryonic Diapause Termination Process in Artemia. Curr Issues Mol Biol 2024; 46:3676-3693. [PMID: 38666959 PMCID: PMC11049050 DOI: 10.3390/cimb46040229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2024] [Revised: 04/02/2024] [Accepted: 04/17/2024] [Indexed: 04/28/2024] Open
Abstract
Artemia is a widely distributed small aquatic crustacean, renowned for its ability to enter a state of embryonic diapause. The embryonic diapause termination (EDT) is closely linked to environmental cues, but the precise underlying mechanisms remain elusive. In this study, ATAC-seq and RNA-seq sequencing techniques were employed to explore the gene expression profiles in Artemia cysts 30 min after EDT. These profiles were compared with those during diapause and 5 h after EDT. The regulatory mechanisms governing the EDT process were analyzed through Gene Ontology (GO) enrichment analysis of differentially expressed genes. Furthermore, the active G-protein-coupled receptors (GPCRs) were identified through structural analysis. The results unveiled that the signaling transduction during EDT primarily hinges on GPCRs and the cell surface receptor signaling pathway, but distinct genes are involved across different stages. Hormone-mediated signaling pathways and the tachykinin receptor signaling pathway exhibited heightened activity in the '0-30 min' group, whereas the Wnt signaling pathway manifested its function solely in the '30 min-5 h' group. These results imply a complete divergence in the mechanisms of signal regulation during these two stages. Moreover, through structural analysis, five GPCRs operating at different stages of EDT were identified. These findings provide valuable insights into the signal regulation mechanisms governing Artemia diapause.
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Affiliation(s)
- Tong Hao
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin 300387, China; (Z.S.); (M.Z.); (L.Z.)
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Duan H, Shao X, Liu W, Xiang J, Pan N, Wang X, Du G, Li Y, Zhou J, Sui L. Spatio-temporal patterns of ovarian development and VgR gene silencing reduced fecundity in parthenogenetic Artemia. Open Biol 2023; 13:230172. [PMID: 37963545 PMCID: PMC10645507 DOI: 10.1098/rsob.230172] [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: 06/04/2023] [Accepted: 10/03/2023] [Indexed: 11/16/2023] Open
Abstract
The halophilic zooplankton brine shrimp Artemia has been used as an experimental animal in multidisciplinary studies. However, the reproductive patterns and its regulatory mechanisms in Artemia remain unclear. In this study, the ovarian development process of parthenogenetic Artemia (A. parthenogenetica) was divided into five stages, and oogenesis or egg formation was identified in six phases. The oogenesis mode was assumed to be polytrophic. We also traced the dynamic translocation of candidate germline stem cells (cGSCs) using EdU labelling and elucidated several key cytological events in oogenesis through haematoxylin and eosin staining and fluorescence imaging. Distinguished from the ovary structure of insects and crustaceans, Artemia germarium originated from ovariole buds and are located at the base of the ovarioles. RNA-seq based on five stages of ovarian development identified 2657 upregulated genes related to reproduction by pair-to-pair comparison. Gbb, Dpp, piwi, vasa, nanos, VgA and VgR genes associated with cGSCs recognition and reproductive development were screened and verified using qPCR. Silencing of the VgR gene in A. parthenogenetica (Ap-VgR) at ovarian development Stage II led to a low level of gene expression (less than 10%) within 5 days, which resulted in variations in oogenesis-related gene expression and significantly inhibited vitellogenesis, impeded oocyte maturation, and eventually decreased the number of offspring. In conclusion, we have illustrated the patterns of ovarian development, outlined the key spatio-temporal features of oogenesis and identified the negative impacts of VgR gene knockdown on oogenesis using A. parthenogenetica as an experimental animal. The findings of this study also lay a foundation for the further study of reproductive biology of invertebrates.
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Affiliation(s)
- Hu Duan
- Asian Regional Artemia Reference Center, College of Marine and Environmental Sciences, Tianjin University of Science and Technology, No. 29, 13th Avenue, Tianjin 300457, People's Republic of China
- Key Laboratory of Marine Resource Chemistry and Food Technology, Ministry of Education, Tianjin University of Science and Technology, No. 29, 13th Avenue, Tianjin 300457, People's Republic of China
| | - Xuanxuan Shao
- Asian Regional Artemia Reference Center, College of Marine and Environmental Sciences, Tianjin University of Science and Technology, No. 29, 13th Avenue, Tianjin 300457, People's Republic of China
| | - Wei Liu
- Asian Regional Artemia Reference Center, College of Marine and Environmental Sciences, Tianjin University of Science and Technology, No. 29, 13th Avenue, Tianjin 300457, People's Republic of China
| | - Jianhai Xiang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, People's Republic of China
| | - Namin Pan
- Asian Regional Artemia Reference Center, College of Marine and Environmental Sciences, Tianjin University of Science and Technology, No. 29, 13th Avenue, Tianjin 300457, People's Republic of China
| | - Xuehui Wang
- Tianjin Fisheries Research Institute, Tianjin 300221, People's Republic of China
| | - Guoru Du
- Asian Regional Artemia Reference Center, College of Marine and Environmental Sciences, Tianjin University of Science and Technology, No. 29, 13th Avenue, Tianjin 300457, People's Republic of China
| | - Ying Li
- Asian Regional Artemia Reference Center, College of Marine and Environmental Sciences, Tianjin University of Science and Technology, No. 29, 13th Avenue, Tianjin 300457, People's Republic of China
| | - Jiaping Zhou
- Research Center of Modern Analytical Technology, Tianjin University of Science and Technology, No. 29, 13th Avenue, Tianjin 300457, People's Republic of China
| | - Liying Sui
- Asian Regional Artemia Reference Center, College of Marine and Environmental Sciences, Tianjin University of Science and Technology, No. 29, 13th Avenue, Tianjin 300457, People's Republic of China
- Key Laboratory of Marine Resource Chemistry and Food Technology, Ministry of Education, Tianjin University of Science and Technology, No. 29, 13th Avenue, Tianjin 300457, People's Republic of China
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Yan ZJ, Wu WT, Xu LY, Bi N, Yang F, Yang WJ, Yang JS. Downregulation of a CT10 regulator of kinase (Crk) promotes the formation of diapause embryos in the brine shrimp Artemia. Gene 2023; 866:147349. [PMID: 36893874 DOI: 10.1016/j.gene.2023.147349] [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: 12/31/2022] [Revised: 02/12/2023] [Accepted: 03/03/2023] [Indexed: 03/09/2023]
Abstract
To survive under harsh environments, embryonic development of Artemia was arrested at the gastrula stage and released as the diapause embryo. Cell cycle and metabolism were highly suppressed in this state of quiescence. However, cellular mechanisms underlying diapause remain largely unclear. In this study, we found that the expression level of a CT10 regulator of kinase-encoding gene (Ar-Crk) in diapause embryos was significantly lower than non-diapause embryos at the early embryogenetic stage of Artemia. Knockdown of Ar-Crk by RNA interference induced formation of diapause embryos, while the control group produced nauplii. Western blot analysis and metabolic assays revealed that the diapause embryos produced by Ar-Crk-knocked-down Artemia had similar characteristics of diapause markers, arrested cell cycle, and suppressed metabolism with those diapause embryos produced by natural oviparous Artemia. Transcriptomic analysis of Artemia embryos revealed knockdown of Ar-Crk induced downregulation of the aurora kinase A (AURKA) signaling pathway, as well as energetic and biomolecular metabolisms. Taken together, we proposed that Ar-Crk is a crucial factor in determining the process of diapause in Artemia. Our results provide insight into the functions of Crk in fundamental regulations such as cellular quiescence.
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Affiliation(s)
- Zhi-Jun Yan
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 3100058, China
| | - Wen-Tao Wu
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 3100058, China
| | - Lian-Ying Xu
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 3100058, China
| | - Ning Bi
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 3100058, China
| | - Fan Yang
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 3100058, China
| | - Wei-Jun Yang
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 3100058, China
| | - Jin-Shu Yang
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 3100058, China.
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Parraguez M. Effect of Different Culture Conditions on Gene Expression Associated With Cyst Production in Populations of Artemia franciscana. Front Genet 2022; 13:768391. [PMID: 35432444 PMCID: PMC9009394 DOI: 10.3389/fgene.2022.768391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 02/08/2022] [Indexed: 11/24/2022] Open
Abstract
Artemia franciscana inhabits hypersaline environments in the Americas and has a well-adapted reproductive system that allows it to survive in these extreme conditions, represented by the production of diapause cysts (oviparous reproduction). This reproduction mode is controlled by numerous genes that are expressed in response to different environmental stressors, enabling this species to avoid population extinction. However, to date, the expression of these genes has not been sufficiently studied to clarify their levels in response to a combination of different environmental factors under controlled conditions. We analyzed the expression of eight genes related to oviparous reproduction (SGEG, Arp-CBP, artemin, BRCA1, p8, ArHsp21, ArHsp22, and p26) to determine their association with cyst production in two populations of A. franciscana with contrasting phenotypes, one with high (Barro Negro, BNE, Chile) and one with low (San Francisco Bay, SFB, United States) cyst production. Populations were cultured under controlled conditions of salinity (SAL, 35 and 75 ppt), photoperiod (PHO, 12L:12D and 24L:00D), iron concentration (IC, 0[Fe] and 5[Fe]), and microalgae diet (DIE; Dunaliella tertiolecta (DUN) and Tetraselmis suecica (TETRA)). Sixteen treatments were performed by combining the two conditions of each of the four factors. Data on nine reproductive parameters per female were recorded, including the percent of offspring encysted (%) (POE). The gene expression levels were analyzed by semiquantitative RT-PCR. The mean POE was significantly greater in BNE than in SFB (32.40 versus 12.74%, Mann-Whitney's test, p < 0.05). Significantly upregulated expression of seven genes in BNE (more than twofold, p < 0.05) was observed in 38.28% of the treatments (e.g., DUN-75ppt-12L:12D-5[Fe] and TETRA-35ppt-12L:12D-5[Fe]). In SFB, seven genes showed significant differential expression, but most were downregulated in 29.69% of the treatments (e.g., DUN-75ppt-12L:12D-0[Fe] and DUN-75ppt-24L:00D-0[Fe]). Multiple regression analyses indicated that in BNE, five genes (SGEG, artemin, Arp-CBP, p8, and BRCA1) and three environmental factors (DIE, SAL, and IC) were important predictor variables for the POE response variable given that all of them were included in the highest-ranking models. In SFB, only two genes (ArHsp21 and artemin) and one environmental factor (SAL) were important explanatory variables in the highest-ranking models. It was concluded that the BNE population presented a characteristic gene expression pattern that differed from that of the SFB population. This pattern might be related to the marked oviparous reproduction of the BNE population. This gene expression pattern could be useful for monitoring the reproductive mode leading to diapause in Artemia and to assist with intensive cyst production in pond systems.
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Affiliation(s)
- Margarita Parraguez
- Laboratorio de Genética, Acuicultura y Biodiversidad, Departamento de Ciencias Biológicas y Biodiversidad, Universidad de Los Lagos, Osorno, Chile
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Zhang F, Wang J, Thakur K, Hu F, Zhang JG, Jiang XF, An SH, Jiang H, Jiang L, Wei ZJ. Isolation functional characterization of allatotropin receptor from the cotton bollworm, Helicoverpa armigera. Peptides 2019; 122:169874. [PMID: 29198647 DOI: 10.1016/j.peptides.2017.11.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 11/24/2017] [Accepted: 11/27/2017] [Indexed: 12/31/2022]
Abstract
Insect allatotropin (AT) plays multi-functions including regulation of juvenile hormone synthesis, growth, development and reproduction. In the present study, the full-length cDNA encoding the AT receptor was cloned from the brain of Helicoverpa armigera (Helar-ATR). The ORF of Helar-ATR exhibited the characteristic seven transmembrane domains of the G protein-coupled receptor (GPCR) and was close to the ATR of Manduca sexta in the phylogenetic tree. The Helar-ATR expressed in vertebrate cell lines can be activated by Helar-AT and each Helar-ATL in a dose-responsive manner, in the following order: Helar-ATLI > Helar-ATLII > Helar-AT > Helar-ATLIII. Helar-ATLI and Helar-ATLII represented the functional ligands to Helar-ATR in vitro, while Helar-AT and Helar-ATLIII behaved as partial agonists. The in vitro functional analysis suggested that the Helar-ATR signal was mainly coupled with elevated levels of Ca2+ and independent of cAMP levels. Helar-ATR mRNA in larvae showed the highest level in the brain, followed by the thorax ganglion, abdomen ganglion, fat body and midgut. Helar-ATR mRNA levels in the complex of the brain-thoracic-abdomen ganglion on the 2nd day of the larval stage and during later pupal stages were observed to be relatively higher than in the wandering and early pupal stages.
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Affiliation(s)
- Fang Zhang
- School of Food Science and Engineering, Hefei University of Technology, Hefei 230009, China
| | - Jun Wang
- School of Food Science and Engineering, Hefei University of Technology, Hefei 230009, China
| | - Kiran Thakur
- School of Food Science and Engineering, Hefei University of Technology, Hefei 230009, China
| | - Fei Hu
- School of Food Science and Engineering, Hefei University of Technology, Hefei 230009, China
| | - Jian-Guo Zhang
- School of Food Science and Engineering, Hefei University of Technology, Hefei 230009, China
| | - Xing-Fu Jiang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Shi-Hen An
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China
| | - Hongbo Jiang
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Li Jiang
- School of Food Science and Engineering, Hefei University of Technology, Hefei 230009, China.
| | - Zhao-Jun Wei
- School of Food Science and Engineering, Hefei University of Technology, Hefei 230009, China.
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Malitan HS, Cohen AM, MacRae TH. Knockdown of the small heat-shock protein p26 by RNA interference modifies the diapause proteome of Artemia franciscana. Biochem Cell Biol 2019; 97:471-479. [PMID: 30620618 DOI: 10.1139/bcb-2018-0231] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Embryos of the crustacean Artemia franciscana may arrest as gastrulae, forming cysts that enter diapause, which is a state of reduced metabolism and enhanced stress tolerance. Diapausing cysts survive physiological stresses for years due, in part, to molecular chaperones. p26, a small heat-shock protein, is an abundant diapause-specific molecular chaperone in cysts, and it affects embryo development and stress tolerance. p26 is therefore thought to influence many proteins in cysts, and this study was undertaken to determine how the loss of p26 by RNA interference (RNAi) affects the diapause proteome of A. franciscana. The proteome was analyzed by shot-gun proteomics coupled to differential isotopic labeling and tandem mass spectrometry. Proteins in the diapause proteome included metabolic enzymes, antioxidants, binding proteins, structural proteins, transporters, translation factors, receptors, and signal transducers. Proteins within the diapause proteome either disappeared or were reduced in amount when p26 was knocked down, or conversely, proteins appeared or increased in amount. Those proteins that disappeared may be p26 substrates, whereas the synthesis of those proteins that appeared or increased may be regulated by p26. This study provides the first global characterization of the diapause proteome of A. franciscana and demonstrates that the sHsp p26 influences proteome composition.
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Affiliation(s)
| | - Alejandro M Cohen
- b Proteomics and Mass Spectrometry Core Facility, Life Sciences Research Institute, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Thomas H MacRae
- a Department of Biology, Dalhousie University, Halifax, NS B3H 4R2, Canada
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Ziv T, Chalifa-Caspi V, Denekamp N, Plaschkes I, Kierszniowska S, Blais I, Admon A, Lubzens E. Dormancy in Embryos: Insight from Hydrated Encysted Embryos of an Aquatic Invertebrate. Mol Cell Proteomics 2017; 16:1746-1769. [PMID: 28729386 DOI: 10.1074/mcp.ra117.000109] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Indexed: 11/06/2022] Open
Abstract
Numerous aquatic invertebrates remain dormant for decades in a hydrated state as encysted embryos. In search for functional pathways associated with this form of dormancy, we used label-free quantitative proteomics to compare the proteomes of hydrated encysted dormant embryos (resting eggs; RE) with nondormant embryos (amictic eggs; AM) of the rotifer Brachionus plicatilisA total of 2631 proteins were identified in rotifer eggs. About 62% proteins showed higher abundance in AM relative to RE (Fold Change>3; p = 0.05). Proteins belonging to numerous putative functional pathways showed dramatic changes during dormancy. Most striking were changes in the mitochondria indicating an impeded metabolism. A comparison between the abundance of proteins and their corresponding transcript levels, revealed higher concordance for RE than for AM. Surprisingly, numerous highly abundant dormancy related proteins show corresponding high mRNA levels in metabolically inactive RE. As these mRNAs and proteins degrade at the time of exit from dormancy they may serve as a source of nucleotides and amino acids during the exit from dormancy. Because proteome analyses point to a similarity in functional pathways of hydrated RE and desiccated life forms, REs were dried. Similar hatching and reproductive rates were found for wet and dried REs, suggesting analogous pathways for long-term survival in wet or dry forms. Analysis by KEGG pathways revealed a few general strategies for dormancy, proposing an explanation for the low transcriptional similarity among dormancies across species, despite the resemblance in physiological phenotypes.
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Affiliation(s)
- Tamar Ziv
- From the ‡Faculty of Biology, Technion-Israel Institute of Technology, Haifa, Israel
| | - Vered Chalifa-Caspi
- §National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Nadav Denekamp
- ¶Israel Oceanographic and Limnological Research, Haifa, Israel
| | - Inbar Plaschkes
- §National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | | | - Idit Blais
- **Division of Reproductive Endocrinology and IVF, Department of Obstetrics and Gynecology, Carmel Medical Center, Haifa, Israel
| | - Arie Admon
- From the ‡Faculty of Biology, Technion-Israel Institute of Technology, Haifa, Israel
| | - Esther Lubzens
- From the ‡Faculty of Biology, Technion-Israel Institute of Technology, Haifa, Israel;
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