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Poddubnaya LG, Zhokhov A, Gibson DI. The unusual cytoarchitecture of "vitelline follicles" in freshwater blood flukes of the genus Sanguinicola (Digenea, Aporocotylidae). Parasite 2021; 28:72. [PMID: 34698631 PMCID: PMC8547224 DOI: 10.1051/parasite/2021070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 10/11/2021] [Indexed: 12/03/2022] Open
Abstract
This is the first study assessing the cytoarchitecture of the vitellarium of members of the freshwater, teleost-infecting lineage of blood-flukes (Aporocotylidae). The vitelline cytoarchitecture of two innominate species of Sanguinicola from freshwater fishes in Russia showed that vitelline cells at different stages of maturation are widely distributed throughout much of the body and are mixed with other cell types. The latter feature indicates that use of the term "follicular vitellarium" is inappropriate for species of this genus. An additional characteristic of the vitelline cells in these Sanguinicola spp. is their ability to form long, pseudopodia-like extensions of the peripheral cytoplasm that contact neighbouring vitelline cells and sarcoplasmic extensions, forming both heterologous and homologous intercellular junctions. Within the vitelline duct lumen, the cytoplasm of mature vitelline cells is filled with regular clusters (0.5-1.0 μm in diameter), comprising 10-30 vitelline globules, which have heterogeneous contents and electron-lucent lipid droplets (1.1-1.7 μm in diameter), but no apparent modifications of vitelline globules occur within the vitelline duct. The flattened, ciliated, epithelial lining of the common vitelline duct contains intra-epithelial nuclei, its luminal surface bears shallow lamellae and adjacent cells are adjoined by apical septate junctions. All of these observations, when compared to the marine Aporocotyle simplex, likely represent additional characteristics supporting the divergent evolutionary lineages of marine and freshwater aporocotylids.
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Affiliation(s)
- Larisa G Poddubnaya
- Institute for Biology of Inland Waters, Russian Academy of Sciences, 152742 Borok, Yaroslavl Province, Russia
| | - Alexander Zhokhov
- Institute for Biology of Inland Waters, Russian Academy of Sciences, 152742 Borok, Yaroslavl Province, Russia
| | - David I Gibson
- Department of Life Sciences, Natural History Museum, Cromwell Road, SW7 5BD London, United Kingdom
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Świderski Z, Kacem H, Mackiewicz JS, Miquel J. Functional ultrastructure and cytochemistry of vitellogenesis and mature vitellocytes of the digenean Cainocreadium labracis (Dujardin, 1845), parasite of Dicentrarchus labrax (L., 1758). Parasitol Res 2018; 118:493-504. [PMID: 30588541 PMCID: PMC6349787 DOI: 10.1007/s00436-018-6180-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 12/11/2018] [Indexed: 11/26/2022]
Abstract
Vitellogenesis and vitellocytes of Cainocreadium labracis were studied by transmission electron microscopy (TEM) and TEM cytochemistry. Four developmental stages were distinguished during vitellogenesis: (I) stem cell of high nucleo-cytoplasmic ratio; (II) early differentiation with chief activity focused on the beginning of protein synthesis and shell globule formation; (III) advanced differentiation with rapid intensification of protein synthesis, progressive fusion of single shell globules into large globule clusters, and formation of unsaturated lipid droplets surrounded by β-glycogen particles; and (IV) mature vitellocyte. Early vitellogenesis with vitellocyte maturation consists of: (1) increase in cell volume; (2) increased development of large, parallel cisternae of GER with production of proteinaceous granules; (3) development of small Golgi complexes that package granules; and (4) within vacuoles, progressive enlargement of proteinaceous granules into shell globule clusters formed during vitellogenesis. Three types of inclusions accumulate in large amounts in mature vitelline cells: (1) shell globule clusters, important component in the formation of egg shell; (2) numerous unsaturated lipid droplets. Though fewer, there are also diphasic droplets consisting of saturated and unsaturated lipids in the same droplet, and (3) a relatively small amount of β-glycogen particles, usually surround a few groups of lipid droplets. The β-glycogen and lipid droplets are nutritive reserves for embryogenesis. General pattern and functional ultrastructure of vitellogenesis greatly resemble those observed in some lower cestodes, such as bothriocephalideans and diphyllobothrideans. Variations and differences in the amount of lipids and of glycogen during vitellogenesis in lower cestodes and other trematodes are compared and discussed.
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Affiliation(s)
- Zdzisław Świderski
- Witold Stefański Institute of Parasitology, Polish Academy of Sciences, 51/55 Twarda Street, 00-818, Warsaw, Poland.
| | - Hichem Kacem
- Laboratoire de Biodiversité et Ecosystèmes Aquatiques, Département des Sciences de la Vie, Faculté des Sciences de Sfax, BP 1171, 3000, Sfax, Tunisia
| | - John S Mackiewicz
- Department of Biological Sciences, University of New York at Albany, Albany, NY, 12222, USA
| | - Jordi Miquel
- Secció de Parasitologia, Departament de Biologia, Sanitat i Medi Ambient, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Av. Joan XXIII, sn, 08028, Barcelona, Spain
- Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona, Av. Diagonal, 645, 08028, Barcelona, Spain
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Greani S, Quilichini Y, Marchand B. Ultrastructural study of vitellogenesis and oogenesis of Crepidostomum metoecus (Digenea, Allocreadiidae), intestinal parasite of Salmo trutta (Pisces, Teleostei). ACTA ACUST UNITED AC 2016; 23:47. [PMID: 27845028 PMCID: PMC5112763 DOI: 10.1051/parasite/2016057] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 10/18/2016] [Indexed: 11/14/2022]
Abstract
We describe the vitellogenesis and oogenesis of Crepidostomum metoecus from Salmo trutta collected in Corsica. This is the first study conducted in the Allocreadiidae family. The maturation of C. metoecus vitellocytes comprises four different stages depending on organelle content. The follicular vitellarium is surrounded by a basal lamina. Vitellocytes are randomly distributed into the vitellarium, although fully mature vitellocytes are found in the center of the follicle. During maturation, the nucleo-cytoplasmic ratio decreases, whereas synthetic activity increases. Fully mature vitellocytes are filled with β-glycogen particles and shell globule clusters. Compared to other trematodes studied, C. metoecus possesses a large amount of nutritive reserves for the developing embryo and high quantities of material for the developing shell. Oocyte maturation takes place in four stages: oogonia, primary oocytes, developing oocytes, and mature oocytes. Developing oocytes enter the zygotene-pachytene stage of the first meiotic division recognizable by the presence of synaptonemal complexes in the nucleoplasm. The low protein composition of mature oocytes associated with the large nutrient content of vitellocytes of C. metoecus enables us to consider that oocytes do not take part of the nutrition of the future embryo of the miracidium. A cytochemical test (Thiéry method) allowed us to detect the presence of polysaccharides and glycogen during maturation of these two cell types.
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Affiliation(s)
- Samuel Greani
- University of Corsica, CNRS, UMR 6134 - SPE, Parasites and Mediterranean Ecosystems Laboratory, 20250 Corte, Corsica, France
| | - Yann Quilichini
- University of Corsica, CNRS, UMR 6134 - SPE, Parasites and Mediterranean Ecosystems Laboratory, 20250 Corte, Corsica, France
| | - Bernard Marchand
- University of Corsica, CNRS, UMR 6134 - SPE, Parasites and Mediterranean Ecosystems Laboratory, 20250 Corte, Corsica, France
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Greani S, Quilichini Y, Foata J, Greiman SE, Ndiaye PI, Tkach VV, Marchand B. Vitellogenesis of the digenean Plagiorchis elegans (Rudolphi, 1802) (Plagiorchioidea, Plagiorchiidae). Parasitol Int 2014; 63:537-43. [PMID: 24569135 DOI: 10.1016/j.parint.2013.12.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Revised: 11/06/2013] [Accepted: 12/20/2013] [Indexed: 11/16/2022]
Abstract
The ultrastructural organization of vitellogenesis of Plagiorchis elegans (Rudolphi, 1802), experimentally obtained from the golden hamster Mesocricetus auratus (Linnaeus, 1758), is described using transmission electron microscopy. This study is the first ultrastructural study of vitellogenesis in a member of the superfamily Plagiorchioidea. The four stages usually observed during vitellogenesis are described: stage I, cytoplasm of the vitellocytes mainly filled with ribosomes and few mitochondria; stage II, beginning of the synthetic activity; stage III, active synthesis of the shell globule clusters; stage IV, vitellocytes are filled with shell globule clusters and contain several lipid droplets, and glycogen granules are grouped around clusters and droplets. Vitellogenesis in P. elegans is compared with that of other Digenea. The differences among P. elegans and previously studied digeneans include, but are not limited to the occurrence of dense coiled endoplasmic reticulum saccules and the concentration of glycogen in the mesenchyme, which may be considered as a fifth stage of maturation of the vitelline glands. This peculiarity was not observed in all trematodes, which clearly indicates differences in the vitellogenesis in various digenean lineages at different stages of maturation of their vitelline cells.
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Affiliation(s)
- Samuel Greani
- University of Corsica, CNRS UMR 6134, Laboratory "Parasites and Mediterranean Ecosystems", 20250 Corte, Corsica, France.
| | - Yann Quilichini
- University of Corsica, CNRS UMR 6134, Laboratory "Parasites and Mediterranean Ecosystems", 20250 Corte, Corsica, France
| | - Joséphine Foata
- University of Corsica, CNRS UMR 6134, Laboratory "Parasites and Mediterranean Ecosystems", 20250 Corte, Corsica, France
| | - Stephen E Greiman
- Department of Biology, University of North Dakota, 10 Cornell Street, 101 Starcher Hall, Grand Forks, ND 58202, USA
| | - Papa Ibnou Ndiaye
- Laboratory of Evolutionary Biology, Ecology and Management of Ecosystems, Faculty of Sciences and Techniques, Cheikh Anta Diop University of Dakar, BP 5055, Dakar, Senegal
| | - Vasyl V Tkach
- Department of Biology, University of North Dakota, 10 Cornell Street, 101 Starcher Hall, Grand Forks, ND 58202, USA
| | - Bernard Marchand
- University of Corsica, CNRS UMR 6134, Laboratory "Parasites and Mediterranean Ecosystems", 20250 Corte, Corsica, France
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Falleni A, Lucchesi P, Ghezzani C, Brogger MI. Ultrastructural and cytochemical aspects of the germarium and the vitellarium inSyndesmis patagonica(Platyhelminthes, Rhabdocoela, Umagillidae). J Morphol 2014; 275:703-19. [DOI: 10.1002/jmor.20251] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Revised: 12/10/2013] [Accepted: 01/02/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Alessandra Falleni
- Department of Clinical and Experimental Medicine, Unit of Experimental Biology and Genetics; University of Pisa; Via A. Volta 4 Pisa 56125 Italy
| | - Paolo Lucchesi
- Department of Clinical and Experimental Medicine, Unit of Experimental Biology and Genetics; University of Pisa; Via A. Volta 4 Pisa 56125 Italy
| | - Claudio Ghezzani
- Department of Clinical and Experimental Medicine, Unit of Experimental Biology and Genetics; University of Pisa; Via A. Volta 4 Pisa 56125 Italy
| | - Martín I. Brogger
- CONICET, Lab. de Ecosistemas Costeros, Museo Argentino de Ciencias Naturales “Bernardino Rivadavia” Av; Ángel Gallardo 470 C1405DJR Buenos Aires Argentina
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