caa a22 4500 445339837 CHVBK 20180317142808.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s00436-011-2444-y doi (NATIONALLICENCE)springer-10.1007/s00436-011-2444-y Ultrastructural study of vitellogenesis in Maritrema feliui (Digenea, Microphallidae) [Elektronische Daten] [Zdzisław Świderski, Abdoulaye Bakhoum, Isabel Montoliu, Carlos Feliu, David Gibson, Jordi Miquel] During vitellogenesis in the microphallid trematode Maritrema feliui, we distinguished four stages: (I) a stem cell stage of the gonial type; (II) an early differentiation stage with the main cell activity concentrated on the initiation of protein synthetic activity and the beginning of shell globule formation; (III) an advanced differentiation stage concentrated on a rapid intensification of protein synthetic activity, the progressive fusion of individual shell globules into large shell globule clusters and the formation of saturated lipid droplets and a small amount of β-glycogen particles in the peripheral cytoplasm, considered as a store of nutritive reserves for the developing embryos; and (IV) the mature vitellocyte. Early vitellocyte maturation is characterised by: (1) an increase in cell volume; (2) extensive development of large, labyrinth-like cisternae of GER that produce proteinaceous granules; (3) the development of Golgi complexes engaged in packaging this material; and (4) a continuous enlargement of proteinaceous granules within vacuoles and their transformation into shell globule clusters composed of the heterogeneous material observed during vitellocyte cytodifferentiation. Mature vitelline cells are very rich in two types of cell inclusions accumulated in large amounts in their cytoplasm: (1) shell globule clusters, which play an important role in eggshell formation; and (2) a few osmiophobic lipid droplets of a saturated nature that undoubtedly represent nutritive reserves for the developing embryos. In addition, there are small numbers of β-glycogen particles in the peripheral cytoplasm of mature vitellocytes of this species. The general pattern and ultrastructure of vitellogenesis in M. feliui greatly resembles those observed in another microphallid trematode, Maritrema linguilla, in other digeneans and in some lower cestodes. Quantitative and qualitative variations in lipids (saturated and unsaturated) and glycogen (α-glycogen rosettes and β-glycogen particles) during platyhelminth vitellogenesis between the different species of trematodes and some lower cestodes are identified and discussed. Springer-Verlag, 2011 Świderski Zdzisław W. Stefański Institute of Parasitology, Polish Academy of Sciences, 51/55 Twarda Street, 00-818, Warsaw, Poland aut Bakhoum Abdoulaye Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII, sn, E08028, Barcelona, Spain aut Montoliu Isabel Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII, sn, E08028, Barcelona, Spain aut Feliu Carlos Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII, sn, E08028, Barcelona, Spain aut Gibson David Department of Zoology, Natural History Museum, Cromwell Road, SW7 5BD, London, UK aut Miquel Jordi Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII, sn, E08028, Barcelona, Spain aut Parasitology Research Springer-Verlag 109/6(2011-12-01), 1707-1714 0932-0113 109:6<1707 2011 109 436 https://doi.org/10.1007/s00436-011-2444-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00436-011-2444-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Świderski Zdzisław W. Stefański Institute of Parasitology, Polish Academy of Sciences, 51/55 Twarda Street, 00-818, Warsaw, Poland aut NATIONALLICENCE 700 1- Bakhoum Abdoulaye Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII, sn, E08028, Barcelona, Spain aut NATIONALLICENCE 700 1- Montoliu Isabel Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII, sn, E08028, Barcelona, Spain aut NATIONALLICENCE 700 1- Feliu Carlos Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII, sn, E08028, Barcelona, Spain aut NATIONALLICENCE 700 1- Gibson David Department of Zoology, Natural History Museum, Cromwell Road, SW7 5BD, London, UK aut NATIONALLICENCE 700 1- Miquel Jordi Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII, sn, E08028, Barcelona, Spain aut NATIONALLICENCE 773 0- Parasitology Research Springer-Verlag 109/6(2011-12-01), 1707-1714 0932-0113 109:6<1707 2011 109 436 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer