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Pan K, Zhu B, Wang L, Guo Q, Shu-Chien AC, Wu X. Expression pattern of AGPATs isoforms indicate different functions during the triacylglyceride synthesis in Chinese mitten crab, Eriocheir sinensis. Comp Biochem Physiol A Mol Integr Physiol 2024; 287:111535. [PMID: 37852318 DOI: 10.1016/j.cbpa.2023.111535] [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: 06/06/2023] [Revised: 10/14/2023] [Accepted: 10/14/2023] [Indexed: 10/20/2023]
Abstract
The 1-acylglycerol-3-phosphate acyltransferase (AGPAT) acts as a crucial enzyme in the process of triacylglycerol (TAG) synthesis, enabling the acylation of lysophosphatidic acid (LPA) into phosphatidic acid (PA). In order to decode the distinctive roles of AGPAT isoforms in the TAG production pathway, three AGPAT isoforms were detected for the first time in the Chinese mitten crab Eriocheir sinensis (Es-agpat2, Es-agpat3, and Es-agpat4). The mRNA levels of Es-agpat2 and Es-agpat4 demonstrated a conspicuous presence in the hepatopancreas, with subsequent high levels in the heart, muscle, and thoracic ganglion. On the other hand, the thoracic ganglion exhibited abundant levels of Es-agpat3, while other tissues recorded relatively low expression levels. Observing the molting cycle of E. sinensis, the hepatopancreas showed minimum expression levels of Es-agpat2 and Es-agpat4 at stage A/B. A peak at stage C was noted, which was then followed by a gradual drop until stage E. For the ovarian development cycle, stage II witnessed the maximum expression level of Es-agpat2 and Es-agpat4, succeeded by a sharp fall in stage III. After this, there was an increasing trend from stage III up to stage V. Expression of Es-agpat3 in the hepatopancreas was consistently lower than Es-agpat2 and Es-agpat4 during either the molting or ovarian development. However, in terms of ovarian expression, Es-agpat3 outperformed Es-agpat2 and Es-agpat4. It exhibited a steep increase in expression, peaking at stage II and subsequently diminishing. In situ hybridization (ISH) revealed that in stages II and IV hepatopancreas, Es-agpat4-mRNA was primarily located in fibrillar cells (F cell) and resorptive cells (R cell), with no signal from Es-agpat3. During stage II of ovarian development, both Es-agpat3-mRNA and Es-agpat4-mRNA were located in the cytoplasm of previtellogenic oocyte (PRO) and endogenous vitellogenic oocyte (EN), with no expression at stage IV. Additionally, the silencing of Es-agpat2 and Es-agpat4 caused a downward trend in the expression levels of all subsequent genes in the E. sinensis TAG synthesis pathway. To sum up, these findings suggest that the three Es-agpats may have unique functions in TAG synthesis during either the molting process or ovarian maturation of E. sinensis.
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Affiliation(s)
- Kewu Pan
- Shanghai Collaborative Innovation Centre for Aquatic Animal Genetics and Breeding, Shanghai Ocean University, Shanghai 201306, China
| | - Boxiang Zhu
- Shanghai Collaborative Innovation Centre for Aquatic Animal Genetics and Breeding, Shanghai Ocean University, Shanghai 201306, China
| | - Lin Wang
- Shanghai Collaborative Innovation Centre for Aquatic Animal Genetics and Breeding, Shanghai Ocean University, Shanghai 201306, China
| | - Qing Guo
- Shanghai Collaborative Innovation Centre for Aquatic Animal Genetics and Breeding, Shanghai Ocean University, Shanghai 201306, China; Centre for Research on Environmental Ecology and Fish Nutrition of the Ministry of Agriculture, Shanghai Ocean University, Shanghai 201306, China
| | - Alexander Chong Shu-Chien
- School of Biological Sciences, University Sains Malaysia, Minden, 11800, Penang, Malaysia; Center for Chemical Biology, University Sains Malaysia, 11900 Bayan Lepas, Penang, Malaysia
| | - Xugan Wu
- Shanghai Collaborative Innovation Centre for Aquatic Animal Genetics and Breeding, Shanghai Ocean University, Shanghai 201306, China; Centre for Research on Environmental Ecology and Fish Nutrition of the Ministry of Agriculture, Shanghai Ocean University, Shanghai 201306, China; National Demonstration Centre for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China.
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2
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Rodríguez EM, Medesani DA, Canosa IS, Avigliano L. The Effect of Glyphosate on the Reproduction of Estuarine Crabs: Neohelice granulata as a Study Model. Front Endocrinol (Lausanne) 2021; 12:643168. [PMID: 33841335 PMCID: PMC8033165 DOI: 10.3389/fendo.2021.643168] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 02/24/2021] [Indexed: 12/11/2022] Open
Abstract
This review summarizes the bulk of evidence about the effect of glyphosate, both technical and formulated, on the ovarian maturation of Neohelice granulata female crabs, as well as the effects of glyphosate on sperm production in males of the same species. After long-term in vivo assays, made during the 3-month pre-reproductive period of this species, both formulated and technical glyphosate were able to produce a significant incidence of oocyte reabsorption in the ovary, together with a concomitant decreased of vitellogenin content, at concentrations ranging from 0.2 to 1 mg/L. Despite this, after 32-day in vivo assays, glyphosate stimulated oocyte growth, in terms of a higher percentage of vitellogenic oocytes, suggesting that glyphosate could be acting as an endocrine disruptor. In vitro assays made with isolated ovarian pieces showed a decrease of vitellogenin content, in correlation with lower protein synthesis, although some advance in maturation was observed in the histological analysis. In male crabs exposed in vivo to both technical and formulated glyphosate at 1 mg/L, several reproductive imbalances were noted, such as a significant decrease of the sperm count, abnormal spermatophores, and possible disrupting effects of glyphosate on the androgenic gland.
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Affiliation(s)
- Enrique M. Rodríguez
- Laboratorio de Fisiología de Crustáceos, Universidad de Buenos Aires, CONICET, Instituto de Biodiversidad y Biología Experimental y Aplicada (IBBEA), Facultad de Ciencias Exactas y Naturales, Departamento de Biodiversidad y Biología Experimental, Ciudad Universitaria, Buenos Aires, Argentina
| | - Daniel A. Medesani
- Laboratorio de Fisiología de Crustáceos, Universidad de Buenos Aires, CONICET, Instituto de Biodiversidad y Biología Experimental y Aplicada (IBBEA), Facultad de Ciencias Exactas y Naturales, Departamento de Biodiversidad y Biología Experimental, Ciudad Universitaria, Buenos Aires, Argentina
| | - Ivana S. Canosa
- Laboratorio de Fisiología de Crustáceos, Universidad de Buenos Aires, CONICET, Instituto de Biodiversidad y Biología Experimental y Aplicada (IBBEA), Facultad de Ciencias Exactas y Naturales, Departamento de Biodiversidad y Biología Experimental, Ciudad Universitaria, Buenos Aires, Argentina
| | - Luciana Avigliano
- Instituto del Conurbano—Universidad Nacional de General Sarmiento (ICO-UNGS), CONICET, Los Polvorines, Argentina
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3
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Ruan Y, Wong NK, Zhang X, Zhu C, Wu X, Ren C, Luo P, Jiang X, Ji J, Wu X, Hu C, Chen T. Vitellogenin Receptor (VgR) Mediates Oocyte Maturation and Ovarian Development in the Pacific White Shrimp ( Litopenaeus vannamei). Front Physiol 2020; 11:485. [PMID: 32499719 PMCID: PMC7243368 DOI: 10.3389/fphys.2020.00485] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Accepted: 04/20/2020] [Indexed: 11/13/2022] Open
Abstract
Oocyte maturation and ovarian development are sequentially coordinated events critical to reproduction. In the ovaries of adult oviparous animals such as birds, bony fish, insects, and crustaceans, vitellogenin receptor (VgR) is a plasma membrane receptor that specifically mediates vitellogenin (Vg) transport into oocytes. Accumulation of Vg drives sexual maturation of the female crustaceans by acting as a pivotal regulator of nutritional accumulation within oocytes, a process known as vitellogenesis. However, the mechanisms by which VgR mediates vitellogenesis are still not fully understood. In this study, we first identified a unique VgR (Lv-VgR) and characterized its genomic organization and protein structural domains in Litopenaeus vannamei, a predominant cultured shrimp species worldwide. This newly identified Lv-VgR phylogenetically forms a group with VgRs from other crustacean species within the arthropod cluster. Duplicated LBD/EGFD regions are found exclusively among arthropod VgRs but not in paralogs from vertebrates and nematodes. In terms of expression patterns, Lv-VgR transcripts are specifically expressed in ovaries of female shrimps, which increases progressively during ovarian development, and rapidly declines toward embryonic development. The cellular and subcellular locations were For analyzed by in situ hybridization and immunofluorescence, respectively. The Lv-VgR mRNA was found to be expressed in the oocytes of ovaries, and Lv-VgR protein was found to localize in the cell membrane of maturing oocytes while accumulation of the ligand Vg protein assumed an even cytoplasmic distribution. Silencing of VgR transcript expression by RNAi was effective for stunting ovarian development. This present study has thus provided new insights into the regulatory roles of VgR in crustacean ovarian development.
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Affiliation(s)
- Yao Ruan
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Nai-Kei Wong
- National Clinical Research Center for Infectious Diseases, Shenzhen Third People's Hospital, The Second Hospital Affiliated to Southern University of Science and Technology, Shenzhen, China
| | - Xin Zhang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Chunhua Zhu
- College of Fisheries, Guangdong Ocean University, Zhanjiang, China
| | - Xiaofen Wu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Chunhua Ren
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,Institution of South China Sea Ecology and Environmental Engineering (ISEE), Chinese Academy of Sciences, Guangzhou, China
| | - Peng Luo
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,Institution of South China Sea Ecology and Environmental Engineering (ISEE), Chinese Academy of Sciences, Guangzhou, China
| | - Xiao Jiang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,Institution of South China Sea Ecology and Environmental Engineering (ISEE), Chinese Academy of Sciences, Guangzhou, China
| | - Jiatai Ji
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,Guangdong Haimao Investment Co., Ltd., Zhanjiang, China
| | - Xugan Wu
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China
| | - Chaoqun Hu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,Institution of South China Sea Ecology and Environmental Engineering (ISEE), Chinese Academy of Sciences, Guangzhou, China
| | - Ting Chen
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,Institution of South China Sea Ecology and Environmental Engineering (ISEE), Chinese Academy of Sciences, Guangzhou, China
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4
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Silveyra GR, Canosa IS, Zanitti M, Rodríguez EM, Medesani DA. Interference of an atrazine commercial formulation with the endocrine control of ovarian growth exerted by the eyestalks. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:965-973. [PMID: 31820235 DOI: 10.1007/s11356-019-07043-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Accepted: 11/12/2019] [Indexed: 06/10/2023]
Abstract
Atrazine is currently one of the most used herbicides worldwide. We tested the possible effect of the widely used herbicide atrazine on the endocrine control of ovarian growth exerted by the neurohormones secreted at the eyestalk of the estuarine crab Neohelice granulata. For this, both in vivo and in vitro assays were carried out. The in vivo assay comprised the exposure for 1 month to 3 mg/L of a commercial formulation containing 90% of atrazine as active ingredient (Gesaprim 90 WDG®, Syngenta) on three categories of females: intact, ablated of one eyestalk, and ablated of both eyestalks. At the end of the assay, only the intact females showed a significant (p < 0.05) decrease in both content of vitellogenic ovarian proteins and proportion of vitellogenic oocytes, compared to a concurrent control. The results of the in vitro incubation of ovarian pieces with the eventual addition to the incubation medium of eyestalk tissue and/or atrazine at 3 mg/L showed a significant (p < 0.05) decrease in the proportion of vitellogenic oocytes only when atrazine and eyestalk tissue were added. Taken together, these results strongly suggest that the assayed atrazine formulation may act as an endocrine disruptor at the eyestalk level, by altering the normal secretion of some eyestalk hormone, therefore inhibiting ovarian growth.
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Affiliation(s)
- Gabriela R Silveyra
- Laboratorio de Fisiología de Crustáceos, Instituto de Biodiversidad y Biología Experimental y Aplicada (IBBEA), Facultad de Ciencias Exactas y Naturales, Departamento de Biodiversidad y Biología Experimental, Universidad de Buenos Aires-CONICET, Ciudad Universitaria, C1428EGA, Buenos Aires, Argentina
| | - Ivana S Canosa
- Laboratorio de Fisiología de Crustáceos, Instituto de Biodiversidad y Biología Experimental y Aplicada (IBBEA), Facultad de Ciencias Exactas y Naturales, Departamento de Biodiversidad y Biología Experimental, Universidad de Buenos Aires-CONICET, Ciudad Universitaria, C1428EGA, Buenos Aires, Argentina
| | - Marina Zanitti
- Laboratorio de Fisiología de Crustáceos, Instituto de Biodiversidad y Biología Experimental y Aplicada (IBBEA), Facultad de Ciencias Exactas y Naturales, Departamento de Biodiversidad y Biología Experimental, Universidad de Buenos Aires-CONICET, Ciudad Universitaria, C1428EGA, Buenos Aires, Argentina
| | - Enrique M Rodríguez
- Laboratorio de Fisiología de Crustáceos, Instituto de Biodiversidad y Biología Experimental y Aplicada (IBBEA), Facultad de Ciencias Exactas y Naturales, Departamento de Biodiversidad y Biología Experimental, Universidad de Buenos Aires-CONICET, Ciudad Universitaria, C1428EGA, Buenos Aires, Argentina.
| | - Daniel A Medesani
- Laboratorio de Fisiología de Crustáceos, Instituto de Biodiversidad y Biología Experimental y Aplicada (IBBEA), Facultad de Ciencias Exactas y Naturales, Departamento de Biodiversidad y Biología Experimental, Universidad de Buenos Aires-CONICET, Ciudad Universitaria, C1428EGA, Buenos Aires, Argentina
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5
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Zhu W, Guo Q, Cheng Y, Wu X. Identification and functional expression of two subtypes of glycerol-3-phosphate acyltransferase differently regulating triacylglyceride synthesis during ovary development in Chinese mitten crab, Eriocheir sinensis. JOURNAL OF EXPERIMENTAL ZOOLOGY PART 2019; 331:494-505. [PMID: 31436894 DOI: 10.1002/jez.2316] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 08/01/2019] [Indexed: 01/09/2023]
Abstract
Triacylglycerides (TAG) are a pivotal nutrient for crustacean reproduction, rapidly accumulating in gonads and hepatopancreas during the ovary development. Glycerol-3-phosphate acyltransferase (GPAT) is the enzyme catalyzing the first step in TAG synthesis. In the present study, two EsGPATs subtypes (EsGPAT1 and EsGPAT2) were identified and characterized. The transcript of EsGPAT1 was highly expressed in thoracic ganglia, hepatopancreas and ovary, while EsGPAT2 was mainly detected in nervous tissues and intestine. During the ovary development, in hepatopancreas, the expression levels of EsGPAT1 increased from Stage I to its maximum at Stage IV and then declined sharply. The transcription levels of EsGPAT2 were highest at Stage I and then gradually declined to reach its minimum at Stage IV. In ovaries, the EsGPAT1 expression levels increased from Stage I to reach its maximum at Stage IV and then declined. The transcription levels of EsGPAT2 reached the peak at Stage I and then declined to the minimum at Stage III. In situ hybridization revealed they were both located in the F cells and R cells of hepatopancreas and all types of cells at Stage I, the follicle cells and the exogenous vitellogenic oocytes at Stage III and nearly mature oocytes at Stage IV of the ovary. In addition, the knockdown of EsGPAT1 downregulated the expression levels of downstream genes in TAG synthesis pathway, but it was not observed in RNAi treatment group of EsGPAT2. These results indicate that the two EsGPATs identified have different roles in TAG metabolism during the ovarian development of E. sinensis.
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Affiliation(s)
- Wangling Zhu
- Centre for Research on Environmental Ecology and Fish Nutrition of the Ministry of Agriculture, Shanghai Ocean University, Shanghai, China.,Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China
| | - Qing Guo
- Centre for Research on Environmental Ecology and Fish Nutrition of the Ministry of Agriculture, Shanghai Ocean University, Shanghai, China.,Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China
| | - Yongxu Cheng
- Centre for Research on Environmental Ecology and Fish Nutrition of the Ministry of Agriculture, Shanghai Ocean University, Shanghai, China.,Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China
| | - Xugan Wu
- Centre for Research on Environmental Ecology and Fish Nutrition of the Ministry of Agriculture, Shanghai Ocean University, Shanghai, China.,Shanghai Collaborative Innovation Centre for Aquatic Animal Genetics and Breeding, Shanghai Ocean University, Shanghai, China
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6
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7
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Colpo KD, López-Greco LS. Dynamics of energy reserves and the cost of reproduction in female and male fiddler crabs. ZOOLOGY 2018; 126:11-19. [DOI: 10.1016/j.zool.2018.01.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 12/04/2017] [Accepted: 01/09/2018] [Indexed: 11/27/2022]
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8
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Canosa IS, Silveyra GR, Avigliano L, Medesani DA, Rodríguez EM. Ovarian growth impairment after chronic exposure to Roundup Ultramax® in the estuarine crab Neohelice granulata. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:1568-1575. [PMID: 29098583 DOI: 10.1007/s11356-017-0581-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 10/24/2017] [Indexed: 05/09/2023]
Abstract
Adult females of the estuarine crab Neohelice granulata were exposed to the glyphosate formulation Roundup Ultramax® during the entire 3-month pre-reproductive period. At the end of the assay, a significant higher increment of glycemia was noted at both glyphosate concentrations assayed (0.01 and 0.2 mg/L, acid equivalent). Although no differences were observed in the gonadosomatic index, a significantly higher proportion of reabsorbed vitellogenic oocyte was observed at the highest glyphosate concentration, together with a significant decrease of vitellogenin content in the ovary. In addition, some in vitro assays were carried out by co-incubating small pieces of ovary with or without the addition of Roundup; at both concentrations tested (same as those used in vivo), a decrease in the ovarian vitellogenin content was observed, whereas the ovarian protein synthesis was significantly inhibited by glyphosate at 0.2 mg/L in the Roundup formulation used.
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Affiliation(s)
- Ivana S Canosa
- Department of Biodiversity and Experimental Biology, FCEN, Institute of Biodiversity, Experimental and Applied Biology (IBBEA), CONICET-UBA, University of Buenos Aires, Ciudad Universitaria, Pab. II, C1428EGA, Buenos Aires, Argentina
| | - Gabriela R Silveyra
- Department of Biodiversity and Experimental Biology, FCEN, Institute of Biodiversity, Experimental and Applied Biology (IBBEA), CONICET-UBA, University of Buenos Aires, Ciudad Universitaria, Pab. II, C1428EGA, Buenos Aires, Argentina
| | - Luciana Avigliano
- Department of Biodiversity and Experimental Biology, FCEN, Institute of Biodiversity, Experimental and Applied Biology (IBBEA), CONICET-UBA, University of Buenos Aires, Ciudad Universitaria, Pab. II, C1428EGA, Buenos Aires, Argentina
| | - Daniel A Medesani
- Department of Biodiversity and Experimental Biology, FCEN, Institute of Biodiversity, Experimental and Applied Biology (IBBEA), CONICET-UBA, University of Buenos Aires, Ciudad Universitaria, Pab. II, C1428EGA, Buenos Aires, Argentina
| | - Enrique M Rodríguez
- Department of Biodiversity and Experimental Biology, FCEN, Institute of Biodiversity, Experimental and Applied Biology (IBBEA), CONICET-UBA, University of Buenos Aires, Ciudad Universitaria, Pab. II, C1428EGA, Buenos Aires, Argentina.
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9
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Kitano H, Nagano N, Sakaguchi K, Matsuyama M. Two vitellogenins in the loliginid squid Uroteuthis edulis: Identification and specific expression in ovarian follicles. Mol Reprod Dev 2017; 84:363-375. [PMID: 28218427 DOI: 10.1002/mrd.22786] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 02/16/2017] [Indexed: 11/08/2022]
Abstract
Vitellogenenesis is a physiological process common in oviparous animals. The molecular profile, modifications, and utilization of vitellogenin (VTG), a precursor of yolk protein, have been characterized in various taxa to understand oogenesis within different modes of reproduction. Hormonal regulation of VTGs has been investigated in invertebrates, such as insects and crustaceans; conversely, little is known for cephalopods. In this study, we isolated two VTG genes (ue-VTG1 and ue-VTG2) from the loliginid swordtip squid, Uroteuthis edulis, via a comprehensive survey of a transcriptome database and subsequent cDNA cloning. Structural analysis of the two ue-VTGs revealed their unique features, namely the absence of two domains usually found in VTGs from other organisms: the von Willebrand factor D domain (vWD) and the domain of unknown function 1943 (DUF1943). Levels of ue-VTG1 and ue-VTG2 transcripts in the ovary, specifically in follicular cells, increased during the late-vitellogenic phase, suggesting that yolk accumulation progresses via paracrine interactions involving follicular cells and oocytes. N-terminal amino acid sequencing of biochemically purified yolk protein revealed its origins from these two VTGs, indicating that both are functional precursors of yolk protein. These results provide information that is essential to understanding the physiological pathway of yolk synthesis, accumulation, and storage in loliginid squids.
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Affiliation(s)
- Hajime Kitano
- Department of Joint Research, Faculty of Agriculture, Fisheries Research Institute of Karatsu, Kyushu University, Karatsu, Saga, Japan
| | - Naoki Nagano
- Department of Joint Research, Faculty of Agriculture, Fisheries Research Institute of Karatsu, Kyushu University, Karatsu, Saga, Japan
| | - Keishi Sakaguchi
- Department of Joint Research, Faculty of Agriculture, Fisheries Research Institute of Karatsu, Kyushu University, Karatsu, Saga, Japan
| | - Michiya Matsuyama
- Department of Bioresource Sciences, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
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10
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Ovarian Transcriptome Analysis of Portunus trituberculatus Provides Insights into Genes Expressed during Phase III and IV Development. PLoS One 2015; 10:e0138862. [PMID: 26431399 PMCID: PMC4591999 DOI: 10.1371/journal.pone.0138862] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 09/04/2015] [Indexed: 12/24/2022] Open
Abstract
Enhancing the production of aquatic animals is crucial for fishery management and aquaculture applications. Ovaries are specialized tissues that play critical roles in producing oocytes and hormones. Significant biochemical changes take place during the sexual maturation of Portunus trituberculatus, but the genetics of this process has not been extensively studied. Transcriptome sequencing can be used to determine gene expression changes within specific periods. In the current study, we used transcriptome sequencing to produce a comprehensive transcript dataset for the ovarian development of P. trituberculatus. Approximately 100 million sequencing reads were generated, and 126,075 transcripts were assembled. Functional annotation of the obtained transcripts revealed important pathways in ovarian development, such as those involving the vitellogenin gene. Also, we performed deep sequencing of ovaries in phases III and IV of sexual maturation in P. trituberculatus. Differential analysis of gene expression identified 506 significantly differentially expressed genes, which belong to 20 pathway, transporters, development, transcription factors, metabolism of other amino acids, carbohydrate and lipid, solute carrier family members, and enzymes. Taken together, our study provides the first comprehensive transcriptomic resource for P. trituberculatus ovaries, which will strengthen understanding of the molecular mechanisms underlying the sexual maturation process and advance molecular nutritional studies of P. trituberculatus.
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11
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Roth Z, Khalaila I. Identification and characterization of the vitellogenin receptor in Macrobrachium rosenbergii and its expression during vitellogenesis. Mol Reprod Dev 2013; 79:478-87. [PMID: 22674884 DOI: 10.1002/mrd.22055] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
In oviparous organisms, oocyte maturation depends on massive production of the egg yolk-precursor protein, vitellogenin (Vg). Vg is taken up by the developing oocytes through receptor-mediated endocytosis (RME), a process essential to successful reproduction. The aims of this study were to identify and characterize the yet-unknown vitellogenin receptor (VgR) from the pleocyamate crustacean Macrobrachium rosenbergii, and to investigate its expression levels during vitellogenesis and its interaction with Vg. The VgR gene was cloned, and its translated protein was specifically located at the oocyte membrane. Moreover, for the first time, a VgR protein was identified and sequenced by mass spectrometry. The putative MrVgR displayed high sequence similarity to VgRs from crustaceans, insects, and vertebrates, and its structure includes typical elements, such as an extracellular, lipoprotein-binding domain (LBD), EGF-like, and O-glycosylation domains, a transmembrane domain, and a short, C-terminal, cytosolic tail. In this article, we identify the first crustacean VgR protein, and present data demonstrating its high affinity for a Vg column followed by elution with suramin and EDTA. Additionally we demonstrate that VgR expression in the oocyte is elevated during vitellogenesis. Our results contribute to the fundamental understanding of oocyte maturation in crustaceans, and particularly elucidate Vg uptake through RME via the VgR.
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Affiliation(s)
- Ziv Roth
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel
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12
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Medesani D, Ferré L, Grodzielski M, Rodríguez E. In vitroeffect of methyl farnesoate on the vitellogenin content of ovary and hepatopancreas, in the crayfishCherax quadricarinatus. INVERTEBR REPROD DEV 2012. [DOI: 10.1080/07924259.2011.582691] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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13
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Dalvin S, Frost P, Loeffen P, Skern-Mauritzen R, Baban J, Rønnestad I, Nilsen F. Characterisation of two vitellogenins in the salmon louse Lepeophtheirus salmonis: molecular, functional and evolutional analysis. DISEASES OF AQUATIC ORGANISMS 2011; 94:211-224. [PMID: 21790068 DOI: 10.3354/dao02331] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The salmon louse Lepeophtheirus salmonis Krøyer affects a variety of wild salmonoid hosts, but is also an important pest in aquaculture, which is a globally important and rapidly growing industry. Salmon lice have large reproductive outputs, and knowledge of reproductive processes may be crucial for the control of this parasite. Here, we report on the characterisation of 2 vitellogenins (LsVit1 and LsVit2), which are the precursors of salmon-louse egg-yolk glycoprotein. The structure of LsVit1 and LsVit2 was examined and compared to that in other oviparous animals. Phylogenetic analysis of LsVit1 and LsVit2 confirmed the view that crustaceans are a polyphyletic group. Transcriptional and translational analysis demonstrated production of LsVit1 and LsVit2 in the subcuticular tissue of the adult female lice. LsVit1 and LsVit2 could also be found in maturing oocytes and developing embryos and early larval stages. LsVit2 was found to be processed into 2 smaller fragments, whereas LsVit1 was found to be full length when deposited into the oocytes. Degradation of LsVit1 and LsVit2 was characterised through embryogenesis and the early non-feeding larval stages. Finally, protein content and the level of free amino acids were analysed in embryos and larval stages and their role in nutrition and osmoregulation discussed. In conclusion, our results confirm the role of vitellogenins in reproduction as providers of embryonic and larval nutrition.
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In vitro effects of both dopaminergic and enkephalinergic antagonists on the ovarian growth of Cherax quadricarinatus (Decapoda, Parastacidae), at different periods of the reproductive cycle. Comp Biochem Physiol A Mol Integr Physiol 2011; 158:126-31. [DOI: 10.1016/j.cbpa.2010.09.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Revised: 09/20/2010] [Accepted: 09/21/2010] [Indexed: 11/21/2022]
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15
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LONGYANT SIWAPORN, SITHIGORNGUL PAISARN, THAMPALERD NITTAYA, SITHIGORNGUL WEERAWAN, MENASVETA PIAMSAK. Monoclonal antibodies production specific to vitellin and vitellogenin of giant tiger prawnPenaeus monodon. INVERTEBR REPROD DEV 2010. [DOI: 10.1080/07924259.1999.9652363] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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16
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Coccia E, De Lisa E, Di Cristo C, Di Cosmo A, Paolucci M. Effects of estradiol and progesterone on the reproduction of the freshwater crayfish Cherax albidus. THE BIOLOGICAL BULLETIN 2010; 218:36-47. [PMID: 20203252 DOI: 10.1086/bblv218n1p36] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In this study we have investigated the role of 17beta-estradiol and progesterone in the reproduction of the crayfish Cherax albidus by using vitellogenin (VTG) as a biomarker. Early-vitellogenic (EV), full-vitellogenic (FV), and non-vitellogenic (NV) females of Cherax albidus were treated with 17beta-estradiol, progesterone, or both for 4 weeks. Levels of VTG mRNA in the hepatopancreas were detected by RT-PCR. The PCR product was sequenced and showed 97% homology with Cherax quadricarinatus VTG. 17beta-estradiol was more effective than progesterone and 17beta-estradiol plus progesterone in increasing the vitellogenin transcript in the hepatopancreas of EV and FV females. On the contrary, progesterone was more effective than 17beta-estradiol and 17beta-estradiol plus progesterone in increasing the vitellogenin concentration in the hemolymph of EV and FV females. Hepatopancreas histology and fatty acid composition of females injected with hormones showed major modifications. No effects were registered in NV females. In conclusion, 17beta-estradiol and progesterone influence VTG synthesis, although our data indicate that they act through different pathways and are not effective until the proper hormonal environment is established, as demonstrated by their inefficacy in NV females.
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Affiliation(s)
- E Coccia
- Department of Biological and Environmental Sciences, University of Sannio, Benevento, Italy
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17
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CAHANSKY ALEJANDRAV, MEDESANI DANIELA, RODRÍGUEZ ENRIQUEM. Induction of ovarian growth in the red claw crayfish,Cherax quadricarinatus, by the enkephalinergic antagonist naloxone:in vivoandin vitrostudies. INVERTEBR REPROD DEV 2008. [DOI: 10.1080/07924259.2008.9652256] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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18
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Zmora N, Trant J, Chan SM, Chung JS. Vitellogenin and Its Messenger RNA During Ovarian Development in the Female Blue Crab, Callinectes sapidus: Gene Expression, Synthesis, Transport, and Cleavage1. Biol Reprod 2007; 77:138-46. [PMID: 17409377 DOI: 10.1095/biolreprod.106.055483] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Blue crab vitellogenin (VTG) cDNA encodes a precursor that, together with two other Brachyuran VTGs, forms a distinctive cluster within a phylogenetic tree of crustacean VTGs. Using quantitative RT-PCR, we found that VTG was primarily expressed in the hepatopancreas of a vitellogenic female, with minor expression in the ovary. VTG expression in the hepatopancreas correlated with ovarian growth, with a remarkable 8000-fold increase in expression from stage 3 to 4 of ovarian development. In contrast, the VTG levels in the hepatopancreas and hemolymph decreased in stage 4. Western blot analysis and N-terminal sequencing revealed that vitellin is composed of three subunits of approximately 78.5 kDa, 119.42 kDa, and 87.9 kDa. The processing pathway for VTG includes an initial hepatopancreatic cleavage of the primary precursor into approximately 78.5-kDa and 207.3-kDa subunits, both of which are found in the hemolymph. A second cleavage in the ovary splits the approximately 207.3-kDa subunit into approximately 119.4-kDa and approximately 87.9-kDa subunits. The hemolymph VTG profiles of mated and unmated females during ovarian development indicate that early vitellogenesis and ovarian development do not require mating, which may be essential for later stages, as VTG decreased to the basal level at stage 4 in the unmated group but remained high in the mated females. Our results encompass comprehensive overall temporal and spatial aspects of vitellogenesis, which may reflect the reproductive physiology of the female blue crab, e.g., single mating and anecdysis in adulthood.
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Affiliation(s)
- Nili Zmora
- Center of Marine Biotechnology, University of Maryland Biotechnology Institute, Baltimore, Maryland 21202, USA
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19
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Li K, Chen L, Zhou Z, Li E, Zhao X, Guo H. The site of vitellogenin synthesis in Chinese mitten-handed crab Eriocheir sinensis. Comp Biochem Physiol B Biochem Mol Biol 2006; 143:453-8. [PMID: 16480909 DOI: 10.1016/j.cbpb.2005.12.019] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2005] [Revised: 12/20/2005] [Accepted: 12/21/2005] [Indexed: 11/28/2022]
Abstract
The objective of this study was to investigate the synthesis site of vitellogenin in the Chinese mitten-handed crab, Eriocheir sinensis. Using the RT-PCR techniques, the cDNA fragments isolated from the ovaries of vitellogenic female crab, we found that its deduced amino acid sequence had a high identity with that from other decapods crustacean vitellogenin. This cDNA fragments were used as probes to examine the transcription of mRNAs encoding the Vg. The mRNA expression was observed in vitellogenic female hepatopancreas, which was not detected in any other tissues including muscle, heart, and subepidermal tissues. The positive immunocytological staining with antibody against vitellin were found in ovaries and hepatopancreas of vitellogenic female, which was determined by immunological and immunohistochemical techniques. These results suggest that both ovaries and hepatopancreas are capable of synthesizing vitellogenin. Therefore, it was concluded that hepatopancreas is the extraovarian site of vitellogenin synthesis in E. sinensis.
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Affiliation(s)
- Kang Li
- Department of Biology, East China Normal University, Shanghai 200062, PR China
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20
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Yano I, Hoshino R. Effects of 17 beta-estradiol on the vitellogenin synthesis and oocyte development in the ovary of kuruma prawn (Marsupenaeus japonicus). Comp Biochem Physiol A Mol Integr Physiol 2006; 144:18-23. [PMID: 16545975 DOI: 10.1016/j.cbpa.2006.01.026] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2005] [Revised: 01/12/2006] [Accepted: 01/18/2006] [Indexed: 11/16/2022]
Abstract
The effects of 17 beta-estradiol on induction of vitellogenin synthesis and oocyte development were investigated in previtellogenic ovary of immature kuruma prawn (Marsupenaeus japonicus) incubated with Medium 199. After three days incubation of previtellogenic ovary, Vg concentrations in media containing 3.6 nM, 36.7 nM, 367 nm and 3671 nM 17 beta-estradiol were significantly (p<0.01) greater than that of Ringer solution or the pure ethanol vehicle. Furthermore, a more advanced stage of oocyte development at oil globule stage (primary vitellogenic stage), which is surrounded by round and greatly expanded follicle cells, was observed in previtellogenic ovarian pieces incubated in media containing 3.6, 36.7, 367 and 3671 nM 17 beta-estradiol. The results of these studies show that 17 beta-estradiol induces Vg synthesis and appearance of primary vitellogenic oocyte in the ovary of immature prawns.
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Affiliation(s)
- Isao Yano
- Department of Marine Bioscience, Fukui Prefectural University, Obama, Fukui 917-0003, Japan.
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21
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Serrano-Pinto V, Landais I, Ogliastro MH, Gutiérrez-Ayala M, Mejía-Ruíz H, Villarreal-Colmenares H, García-Gasca A, Vázquez-Boucard C. Vitellogenin mRNA expression in Cherax quadricarinatus during secondary vitellogenic at first maturation females. Mol Reprod Dev 2005; 69:17-21. [PMID: 15278899 DOI: 10.1002/mrd.20157] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
PCR products of 1.1 and 0.9 kb were generated using Cherax quadricarinatus genomic DNA in the first case, and hepatopancreas and ovary cDNAs in the second case. These PCR products were cloned and analyzed for nucleotide sequences. The 1.1 kb fragment was used as a probe for Northern hybridization, revealing a transcript of approximately 8 kb in both tissues. Results from both Northern blot and RT-PCR analyses showed that the mRNA enconding the 3' end of the vitellogenin cDNA was present simultaneously in both hepatopancreas and ovary tissues in secondary vitellogenic at first maturation females, but was not detected in male hepatopancreas. The deduced amino acid sequences of Vitellogenin (Vg) cDNAs from ovary and hepatopancreas confirmed the existence at least two different Vg genes, and two different sites of synthesis.
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Affiliation(s)
- Vania Serrano-Pinto
- CIBNOR-Centro de Investigaciones Biológicas del Noroeste, S.C. Programa de Acuacultura, La Paz 23000, B.C.S., México.
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22
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Avarre JC, Michelis R, Tietz A, Lubzens E. Relationship between vitellogenin and vitellin in a marine shrimp (Penaeus semisulcatus) and molecular characterization of vitellogenin complementary DNAs. Biol Reprod 2003; 69:355-64. [PMID: 12672675 DOI: 10.1095/biolreprod.102.011627] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
The source of yolk proteins in crustacean ovaries has been the subject of controversy for several decades, and both extraovarian and intraovarian synthesized proteins have been implicated. To offer a new insight into the relationship of vitellogenin (VTG) and vitellin (VT), a comparison of extraovarian VTG and ovarian VT of the marine shrimp Penaeus semisulcatus was performed at the protein and cDNA levels. Two cDNAs (7920 and 2068 nucleotides [nt]) were sequenced for VTG from the ovary and one cDNA (7920 nt) was sequenced from the hepatopancreas. VTG cDNA from hepatopancreas was similar to VTG cDNA from ovary. Although a VTG gene was also found in the males, approximately 7.8-kilobase transcripts were only detected in the ovary and hepatopancreas of females. The mRNA expression pattern was related to the stage of ovarian development and to the molt cycle, as determined by real-time polymerase chain reaction assay. VTG and VT apoproteins were composed of two and three major subunits, respectively, as shown by SDS-PAGE. N-terminal sequences of these subunits revealed the presence of a cleavage site at a consensus motif for a subtilisin-like endoprotease in VTG and VT and an additional cleavage site in VT revealed by an unidentified endoprotease. These results indicate that penaeid shrimps constitute a unique model for vitellogenesis, showing intraovarian gene expression and synthesis of yolk protein.
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23
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Jayasankar V, Tsutsui N, Jasmani S, Saido-Sakanaka H, Yang WJ, Okuno A, Tran TTH, Aida K, Wilder MN. Dynamics of vitellogenin mRNA expression and changes in hemolymph vitellogenin levels during ovarian maturation in the giant freshwater prawn Macrobrachium rosenbergii. THE JOURNAL OF EXPERIMENTAL ZOOLOGY 2002; 293:675-82. [PMID: 12410595 DOI: 10.1002/jez.10167] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The dynamics of vitellogenin mRNA expression during ovarian maturation in Macrobrachium rosenbergii were examined by measuring hemolymph vitellogenin (Vg) levels and Vg mRNA expression in the hepatopancreas and ovary at differing reproductive stages in both intact and eyestalk ablated animals. Vg mRNA was quantified using real-time RT-PCR and hemolymph Vg was measured by enzyme immunoassay. In intact animals, Vg mRNA levels in the hepatopancreas and hemolymph Vg levels showed a gradual increase during the molt cycle concomitant with increasing gonadosomatic index (GSI), with Vg levels decreasing prior to ecdysis although GSI continued to increase. Eyestalk ablation was seen to accelerate Vg synthesis as well as ovarian maturation, although it did not alter the overall pattern of Vg expression. Vg mRNA expression was negligible in the ovary of both intact and eyestalk ablated animals, confirming that the hepatopancreas is the principal site of Vg synthesis in M. rosenbergii with the ovary being only a minor contributor. This study has shown that Vg synthesis is correlated to ovarian maturation and the molt cycle in M. rosenbergii.
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Affiliation(s)
- Vidya Jayasankar
- Japan International Research Center for Agricultural Sciences, Tsukuba, Ibaraki 305-8686, Japan
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24
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TSENG DENGYU, CHEN YINGNAN, LIU KUANFU, KOU GUANGHSIUNG, LO CHUFANG, KUO CHINGMING. Hepatopancreas and ovary are sites of vitellogenin synthesis as determined from partial cDNA encoding of vitellogenin in the marine shrimp,Penaeus vannamei. INVERTEBR REPROD DEV 2002. [DOI: 10.1080/07924259.2002.9652770] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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25
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SAGI AMIR, MANOR RIVKA, SEGALL CARMEN, DA VIS CLAYTUS, KHALAILA ISAM. On intersexuality in the crayfishCherax quadricarinatus: an inducible sexual plasticity model. INVERTEBR REPROD DEV 2002. [DOI: 10.1080/07924259.2002.9652732] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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26
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Tsukimura B, Waddy SL, Vogel JM, Linder CJ, Bauer DK, Borst DW. Characterization and quantification of yolk proteins in the lobster,Homarus americanus. ACTA ACUST UNITED AC 2002. [DOI: 10.1002/jez.10047] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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27
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Rodríguez EM, López Greco LS, Medesani DA, Laufer H, Fingerman M. Effect of methyl farnesoate, alone and in combination with other hormones, on ovarian growth of the red swamp crayfish, Procambarus clarkii, during vitellogenesis. Gen Comp Endocrinol 2002; 125:34-40. [PMID: 11825032 DOI: 10.1006/gcen.2001.7724] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The effect of methyl farnesoate (MF) on the ovaries of female red swamp crayfish, Procambarus clarkii, undergoing vitellogenesis was determined both in vivo and in vitro. The in vivo assay showed a positive effect of MF on oocyte growth when injected alone and in combination with 17 beta-estradiol, but not in combination with JHIII or 17 alpha-hydroxyprogesterone. A higher level of incorporation of labeled leucine was induced by MF on isolated pieces of ovary. The same effect was seen when ovary and mandibular organ (MO) were coincubated. These results suggest that MF stimulated the synthesis of vitellin in the ovary of crayfish. In vitro, 17 alpha-hydroxyprogesterone completely suppressed the stimulatory action of the MO on the ovary, suggesting a competitive inhibition between 17 alpha-hydroxyprogesterone and MF on the ovary and/or a negative feedback by that steroid on the MO.
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Affiliation(s)
- Enrique M Rodríguez
- Animal Physiology Laboratory, FCEyN, University of Buenos Aires, Ciudad Universitaria, Buenos Aires, C1428EHA, Argentina
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28
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Wen X, Chen L, Ai C, Zhou Z, Jiang H. Variation in lipid composition of Chinese mitten-handed crab, Eriocheir sinensis during ovarian maturation. Comp Biochem Physiol B Biochem Mol Biol 2001; 130:95-104. [PMID: 11470448 DOI: 10.1016/s1096-4959(01)00411-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
This experiment was conducted to investigate the variation in lipid composition during the ovarian maturation of the crab Eriocheir sinensis. The Chinese mitten-handed crab broodstock was divided into six different maturation periods according to the size and color of ovary. Ovary, hepatopancreas, muscle, and hemolymph of broodstock in different maturation periods were analyzed for total lipid and fatty acids using gas chromatography, and lipid classes by thin-layer chromatography. The ovarian lipid concentration (expressed as percent wet ovarian weight) increased steadily from stage II (5.4%) to stage IV (19.1%), and decreased to the lowest levels after spawning (stage V, 6.6%). The hepatopancreatic lipid concentration (expressed as percent wet hepatopancreatic weight) increased with maturity of the ovaries, reached a maximum at stage III(2) (29.9%), and decreased during the subsequent period to spawning (16.7%). The muscular and hemolymph lipid concentration did not change markedly during the ovarian development. These results suggest the possible movement of hepatopancreatic lipids to the ovaries during the ovarian maturation. Both triacylglycerol and phosphatidylcholine were responsible for the increase in ovarian lipid concentration during sexual maturation. The fatty acids of total lipid, triacylglycerol, and phosphatidylcholine of the ovaries did not vary systematically during the ovarian maturation, but the ratio between n-3PUFA (polyunsaturated fatty acid) and n-6PUFA did change regularly with the ovarian lipid. These suggest that enough PUFA, especially n-3PUFA, should be supplied to the crab during ovarian maturation.
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Affiliation(s)
- X Wen
- Department of Biology, East China Normal University, 200062, Shanghai, PR China.
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29
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Tseng DY, Chen YN, Kou GH, Lo CF, Kuo CM. Hepatopancreas is the extraovarian site of vitellogenin synthesis in black tiger shrimp, Penaeus monodon. Comp Biochem Physiol A Mol Integr Physiol 2001; 129:909-17. [PMID: 11440876 DOI: 10.1016/s1095-6433(01)00355-5] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The site of yolk protein synthesis in crustaceans has long been a subject of controversy. The vitellogenin gene structure was partially reported only very recently in Macrobrachium rosenbergii, after which the hepatopancreas was confirmed as the extraovarian site of vitellogenin synthesis in that species. Ovaries are the most frequently reported as the site of yolk protein synthesis in penaeid shrimp. Using cDNA reversed-transcribed from mRNA isolated from the hepatopancreas of vitellogenic female shrimp, Penaeus monodon, we found that its deduced amino acid sequence had high identity of 48% with that from M. rosenbergii vitellogenin. A similar location of the intron in the sequenced region of genomic DNA was also found between these two species. We therefore concluded that the hepatopancreas the extraovarian site of vitellogenin synthesis in P. monodon in vivo. The partial structure of vitellogenin gene is presented in this study.
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Affiliation(s)
- D Y Tseng
- Department of Zoology, National Taiwan University, Taipei, Taiwan 106, ROC
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30
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31
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Yang WJ, Ohira T, Tsutsui N, Subramoniam T, Huong DT, Aida K, Wilder MN. Determination of amino acid sequence and site of mRNA expression of four vitellins in the giant freshwater prawn, Macrobrachium rosenbergii. THE JOURNAL OF EXPERIMENTAL ZOOLOGY 2000; 287:413-22. [PMID: 11074453 DOI: 10.1002/1097-010x(20001101)287:6<413::aid-jez2>3.0.co;2-v] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Four major yolk proteins, designated as vitellins (Vns) Macr-VnA, B, C, and D, were extracted from mature ovaries of Macrobrachium rosenbergii. These were purified to homogeneity by reversed-phase high performance liquid chromatography (HPLC) employing a unique separation system based on the hydrophobic properties of the Vn molecule. Using standard techniques of protein sequencing, more than 33 N-terminal and 57 internal amino acid residues were determined for each of the four Vns. The cDNA fragments encoding the four Vns were amplified by PCR using degenerate oligonucleotide primers derived from the N-terminal and internal amino acid sequences. These cDNA fragments were cloned, sequenced, and used as probes to examine the transcription of mRNAs encoding the four Vns. Significant accumulations of these mRNAs were observed in female hepatopancreas only, while mRNA expression was not detected in male hepatopancreas or any other female tissue including ovary, subepidermal adipose tissue, gill, and muscle. This is the first occasion in Crustacea in which multiple Vns were demonstrated to be synthesized simultaneously in a single tissue.
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Affiliation(s)
- W J Yang
- Japan International Research Center for Agricultural Sciences, Ministry of Agriculture, Forestry and Fisheries, Tsukuba, Ibaraki Prefecture 305-8686, Japan
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Yehezkel G, Chayoth R, Abdu U, Khalaila I, Sagi A. High-density lipoprotein associated with secondary vitellogenesis in the hemolymph of the crayfish Cherax quadricarinatus. Comp Biochem Physiol B Biochem Mol Biol 2000; 127:411-21. [PMID: 11126772 DOI: 10.1016/s0305-0491(00)00270-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The high-density lipoproteins LPI and LPII were isolated from the hemolymph of the crayfish Cherax quadricarinatus by gradient ultracentrifugation and high-performance liquid chromatography (HPLC). Both lipoproteins contained a carotenoid moiety. LPI is comprised of a single polypeptide with an approximate molecular mass of 96 kDa. LPII was composed of two similar native components, LPIIa and LPIIb, both having polypeptides of 80 and 177 kDa. Both under natural conditions and after endocrine manipulations, LPI was present in males and in females, regardless of the female reproductive stage. LPII was present only in secondary-vitellogenic females, but not during the winter reproductive arrest period. LPII was also absent from young females that had received androgenic gland implants. LPII also appeared in the hemolymph of intersex individuals from which the androgenic gland had been removed. It is therefore suggested that LPII serves as a marker indicating the onset of secondary vitellogenesis in C. quad'iariicarintus females.
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Affiliation(s)
- G Yehezkel
- Department of Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
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35
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Tsukimura B, Bender JS, Linder CJ. Development of an anti-vitellin ELISA for the assessment of reproduction in the ridgeback shrimp, Sicyonia ingentis. Comp Biochem Physiol A Mol Integr Physiol 2000; 127:215-24. [PMID: 11064288 DOI: 10.1016/s1095-6433(00)00255-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
To investigate the reproductive regulation of the ridgeback shrimp, Sicyonia ingentis, vitellin (Vn) synthesis was studied. Using gel filtration chromatography and sodium dodecyl sulfate-polyacrylamide gel electrophoresis, Vn was found to have a molecular mass of 322 kDa and to be composed of three subunits of 182, 91 and 85 kDa. Purified Vn was used to prepare anti-Vn antiserum, which was used to develop an enzyme-linked immunosorbent assay (ELISA) with a dynamic range of 0.3-300 ng. The ELISA was used to measure hemolymph levels of yolk proteins. The mean hemolymph concentrations in fresh caught animals ranged from 256 (+/-36.6 S.E.M.) to 1073 (+/-87.6 S.E.M.) mg/ml in stage 2 and 4 animals, respectively. The ELISA was also used to determine the effects of steroid hormone injections in adult non-reproductive female shrimp. One milligram injections of progesterone, 17alpha-hydroxyprogesterone or 17beta-estradiol were administered for three consecutive days to individual females. There were no changes in hemolymph vitellogenin levels during the successive 7-day period following the first injection of any steroid.
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Affiliation(s)
- B Tsukimura
- Department of Biology, MS#SB73, California State University, 2555 East San Ramon Avenue, Fresno, CA 93740-8034, USA.
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36
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Okuno A, Katayama H, Nagasawa H. Partial characterization of vitellin and localization of vitellogenin production in the terrestrial isopod, Armadillidium vulgare. Comp Biochem Physiol B Biochem Mol Biol 2000; 126:397-407. [PMID: 11007182 DOI: 10.1016/s0305-0491(00)00214-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Vitellins were purified separately from ovaries and eggs of the isopod, Armadillidium vulgare. Ovarian vitellin consisted of at least six proteins with relative molecular masses of 205, 200, 185, 180, 122 and 112 kDa. The larger four proteins disappeared in eggs within a week after oviposition and a 59-kDa protein appeared thereafter. The amino-terminal amino acid sequences of these vitellin proteins were identical except for the ovarian 112 kDa, egg 112 kDa and 59 kDa proteins, and showed considerable similarity to those of known vitellogenins from other animals. Comparison of tryptic peptide maps of the 122 and 112 kDa proteins from eggs on reversed-phase HPLC and sequence identification of two randomly selected peaks having the same retention times indicated that two peptides were mostly similar in sequence. PCR-assisted cloning of the 5' region of a cDNA (591 bp) encoding vitellogenin revealed the presence of a signal peptide consisting of 16 amino acid residues and clarified the structural relationship among the protein components except for the ovarian 112 kDa and the egg 59 kDa proteins. Northern blot analysis revealed that the fat body is the main vitellogenin producing organ.
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Affiliation(s)
- A Okuno
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Japan
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Tsutsui N, Kawazoe I, Ohira T, Jasmani S, Yang WJ, Wilder MN, Aida K. Molecular Characterization of a cDNA Encoding Vitellogenin and Its Expression in the Hepatopancreas and Ovary during Vitellogenesis in the Kuruma Prawn, Penaeus japonicus. Zoolog Sci 2000; 17:651-60. [DOI: 10.2108/zsj.17.651] [Citation(s) in RCA: 140] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/1999] [Accepted: 01/14/2000] [Indexed: 11/17/2022]
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Chaves AR. Effect of x-organ sinus gland extract on [(35)S] methionine incorporation to the ovary of the red swamp crawfish Procambarus clarkii. Comp Biochem Physiol A Mol Integr Physiol 2000; 126:407-13. [PMID: 10964035 DOI: 10.1016/s1095-6433(00)00225-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The presence of gonad-inhibiting hormone in the x-organ sinus gland complex was evaluated in female Procambarus clarkii. Elimination of gonad-inhibiting hormone by way of eyestalk removal resulted in a large acceleration of ovarian development. Daily injection of four sinus gland equivalents reduced ovarian growth of eyestalk-ablated females by about 50% on day 6. Use of the radiotracer [(35)S] methionine showed that gonad-inhibiting activity reached its peak effect between 12 and 24 h following sinus gland injection. Dose-response showed that at least two sinus gland equivalents were needed to significantly counter the accelerated growth induced by eyestalk ablation. The high dose of extract needed to cause significant inhibition was attributed to this delayed response, which subsequently may have required a relatively prolonged exposure to the hormone.
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Affiliation(s)
- A R Chaves
- Department of Biology, Texas A&M University, College Station, TX 77843, USA.
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Pateraki LE, Stratakis E. Synthesis and organization of vitellogenin and vitellin molecules from the land crab Potamon potamios. Comp Biochem Physiol B Biochem Mol Biol 2000; 125:53-61. [PMID: 10840641 DOI: 10.1016/s0305-0491(99)00160-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We have previously reported that vitellogenin (Vg) of some female animals contained four polypeptides with molecular mass of 181, 115, 105 and 85 kDa, whereas Vg of most animals contained three polypeptides with molecular mass of 115, 105 and 85 kDa. In the present investigation, we examined whether the 181 kDa polypeptide is the precursor of 115 and 105 kDa Vg and vitellin (Vn) polypeptides. Labeling studies, using [35S]methionine on normal vitellogenic animals, showed that the radioactivity was distributed first among the 181 and 85 kDa polypeptides. SDS-PAGE analysis of purified hemolymph Vg from eyestalk ablated female animals revealed in most animals two polypeptides with an apparent molecular mass of 181 and 85 kDa. These results from in vivo experiments corroborated the view that the 115 and 105 kDa Vg and Vn polypeptides are derived from heaviest 181 kDa polypeptide. In addition it was demonstrated that hepatopancreas and ovary of Potamon potamios incubated in vitro with [35S]methionine synthesized five polypeptides with apparent molecular mass of 224, 181, 115, 105, and 85 kDa while the hepatopancreas appeared to secrete the 181, 115, 105 and 85 kDa polypeptides. The major 115, 105 and 85 kDa polypeptides were found to be components of egg Vn, while the 224 kDa polypeptide was found to be minor component of Vg and Vn from hepatopancreas and ovary extracts, respectively. We conclude that the Vn polypeptides produced by ovary are similar to those produced by hepatopancreas.
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Affiliation(s)
- L E Pateraki
- Department of Biology, University of Crete, Heraklion, Greece
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Lee FY, Chang CF. Hepatopancreas is the likely organ of vitellogenin synthesis in the freshwater prawn, Macrobrachium rosenbergii. THE JOURNAL OF EXPERIMENTAL ZOOLOGY 1999; 284:798-806. [PMID: 10589510 DOI: 10.1002/(sici)1097-010x(19991201)284:7<798::aid-jez10>3.0.co;2-c] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The objective of the present study was to investigate the source of vitellogenin in the freshwater prawn, Macrobrachium rosenbergii. Ovarian development of M. rosenbergii was classified into five stages (stage I-V). Vitellin/vitellogenin was detected in the ovary and the hepatopancreas in different stages by native-PAGE and Western blotting. Two and three subunits of vitellin were observed in the ovary at the early- (I-II), mid- and late- (III-V) stages, respectively. The subunit of vitellogenin was not detected in the hepatopancreas at different stages of prawns. Hepatopancreas had positive immunocytological staining (against vitellin antibody) in different ovarian stages of prawn. Only vitellogenic oocyte but not previtellogenic oocytes and follicle cells had a positive immunocytological staining. Hepatopancreas could synthesize radiolabeled immunoreactive proteins after incubation with radiolabeled glycine on the basis of immunoprecipitation (against vitellin antiserum). Therefore, it is concluded that hepatopancreas is the most likely organ to synthesize vitellogenin in the freshwater prawn, M. rosenbergii.
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Affiliation(s)
- F Y Lee
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan, Republic of China
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Chen YN, Tseng DY, Ho PY, Kuo CM. Site of vitellogenin synthesis determined from a cDNA encoding a vitellogenin fragment in the freshwater giant prawn, Macrobrachium rosenbergii. Mol Reprod Dev 1999; 54:215-22. [PMID: 10497343 DOI: 10.1002/(sici)1098-2795(199911)54:3<215::aid-mrd2>3.0.co;2-e] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Vitellogenesis is an important part of reproductive process in crustaceans, and the process is characterized by the synthesis and accumulation of yolk protein in the developing oocytes. The yolk proteins in crustaceans mainly consist of vitellogenin (Vg) and vitellin (Vn), which are respectively present in extra-oocyte tissues and intra-oocytes. The site and the process of yolk protein synthesis in crustaceans are still controversial. The synthesis site of Vg in a crustacean species, Macrobrachium rosenbergii, is determined by immunological and immunohistochemical techniques, and molecular cloning of a cDNA encoding the primary structure of Vn in this study. The hepatopancrease is clearly shown to be the synthesis site of Vg in this species. The length of Vg mRNA was estimated as about 6 kb from Northern blotting analysis. The partial primary structure of Vg gene is presented, and the post-translational processing are further discussed. For the first time, the partial primary structure of Vg gene and the synthesis site of Vg approached by molecular cloning in crustaceans are presented.
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Affiliation(s)
- Y N Chen
- Institute of Fisheries Science, National Taiwan University, Taipei, Taiwan, Republic of China
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Thurn MJ, Hall MR. Ovarian function in the giant tiger prawn (Penaeus monodon) as determined by in vitro bioassay. Physiol Biochem Zool 1999; 72:588-96. [PMID: 10521326 DOI: 10.1086/316700] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Ovary tissue fragments of the giant tiger prawn Penaeus monodon were incubated in vitro with L-methionine[35S] plus L-cysteine[35S] as a metabolic labeling reagent. The labeled cytoplasmic and secreted proteins synthesized in vitro during incubations under various conditions were subjected to SDS polyacrylamide electrophoresis and visualized by autoradiography. Vitellogenin (Vg) was immunologically identified and shown to be actively synthesized and released into the incubation medium. The synthesis and release of Vg into the incubation medium was optimized and shown to be linear over a 16-h period. Comparisons between different ovarian regions and different stages of development revealed that the level of Vg synthesis and accumulation in the incubation media was variable depending on stage of development and region within the ovary. Coincubation of ovarian fragments with sinus gland extracts showed a dose-related inhibition of total protein and Vg synthesis. The in vitro ovarian bioassay is suitable for examining the effect of hormonal inputs of P. monodon.
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Affiliation(s)
- M J Thurn
- Australian Institute of Marine Science, P.M.B. No. 3, Townsville M.C., Queensland 4810, Australia
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Riley LG, Tsukimura B. Yolk protein synthesis in the riceland tadpole shrimp,Triops longicaudatus, measured by in vitro incorporation of3H-leucine. ACTA ACUST UNITED AC 1998. [DOI: 10.1002/(sici)1097-010x(19980615)281:3<238::aid-jez10>3.0.co;2-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Pateraki LE, Stratakis E. Characterization of vitellogenin and vitellin from land crabPotamon potamios: Identification of a precursor polypeptide in the molecule. ACTA ACUST UNITED AC 1997. [DOI: 10.1002/(sici)1097-010x(19971215)279:6<597::aid-jez8>3.0.co;2-i] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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QIU YW, NG TB, CHU KH. Purification and characterization of vitellin from the ovaries of the shrimpMetapenaeus ensis(Crustacea: Decapoda: Penaeidae). INVERTEBR REPROD DEV 1997. [DOI: 10.1080/07924259.1997.9672579] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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46
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CHANG CHINGFONG, JENG SHANRU, LIN MINNAN, TIN YUNYUEN. Purification and characterization of vitellin from the mature ovaries of prawn,Penaeus chinensis. INVERTEBR REPROD DEV 1996. [DOI: 10.1080/07924259.1996.9672500] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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SAGI AMIR, SHOUKRUN RAMI, KHALAILA ISAM, RISE MOSHE. Gonad maturation, morphological and physiological changes during the first reproductive cycle of the crayfishCherax quadricarinatusfemale. INVERTEBR REPROD DEV 1996. [DOI: 10.1080/07924259.1996.9672518] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Chang CF, Jeng SR. Isolation and characterization of the female-specific protein (vitellogenin) in mature female hemolymph of the prawn Penaeus chinensis. Comp Biochem Physiol B Biochem Mol Biol 1995. [DOI: 10.1016/0305-0491(95)00059-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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49
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Lee CY, Watson RD. In vitro study of vitellogenesis in the blue crab (Callinectes sapidus): Site and control of vitellin synthesis. ACTA ACUST UNITED AC 1995. [DOI: 10.1002/jez.1402710506] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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SAGI AMIR, SOROKA YORAM, SNIR EVYATAR, CHOMSKY ORNA, CALDERON JORGE, MILNER YORAM. Ovarian protein synthesis in the prawnMacrobrachium rosenbergii:Does ovarian vitellin synthesis exist? INVERTEBR REPROD DEV 1995. [DOI: 10.1080/07924259.1995.9672432] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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