Vitellocytes and vitellogenesis in cestodes in relation to embryonic development, egg production and life cycle

Świderski, Zdzisław; Xylander, Willi E. R.

doi:10.1016/s0020-7519(00)00066-7

Cited by 66 publications

(90 citation statements)

References 28 publications

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“…Lipid droplets have been detected in the maturing vitellocytes (stage III) of C. laticeps (present study) and in the mature vitellocytes (stage IV) of A. sieboldi (Bruňanská et al, 2012b) and Monobothrioides chalmersius (Arafa, 2012). They are osmiophobic and electron-lucent, a feature being indicative of saturated lipids (Świderski & Xylander, 2000). The presence of saturated lipid droplets has been also described in amphilinideans, gyrocotylideans (Xylander, 1987;1988), spathebothriideans (Bruňanská et al, 2005;Poddubnaya et al, 2006), bothriocephalideans (Świderski & Mokhtar, 1974;Korneva, 2001, Levron et al, 2007, tetraphyllideans (Mokhtar-Maamouri & Świderski, 1976), trypanorhynchs (Świderski et al, 2006a, b, 2007, 2012), diphyllideans (Świderski et al, 2011b), and/or proteocephalideans (Bruňanská, 1997(Bruňanská, , 1999.…”

Section: Discussionsupporting

confidence: 59%

“…The second form (tightly packed shell globules embedded in matrix of moderate electrondensity) is found in caryophyllideans (Świderski & Mackiewicz, 1976;Świderski et al, 2004a;Bruňanská et al, 2012b;present study), and spathebothriideans (Bruňanská et al, 2005;Poddubnaya et al, 2006). The lack of cytoplasmic lipid droplets and the large amount of glycogen have been consisdered to be the most characteristic features of vitellocytes in the Caryophyllidea (Świderski & Xylander, 2000). However, recent investigations have revealed the presence of lipid droplets in the mature vitellocytes of some caryophyllideans, e.g.…”

Section: Discussionmentioning

confidence: 67%

“…Ultrastructural characters of the vitellarium might be useful .... for a better understanding of the relationships between different taxa within the neoophoran Platyhelminthes (Gremini & Falleni, 1998) including Cestoda (Świderski & Mackiewicz, 1976;Świderski & Xylander, 2000;Bruňanská et al, 2005;Poddubnaya et al, 2006Poddubnaya et al, , 2012Levron et al, 2007). The structure and composition of eggshell-forming globules in vitellocytes have been considered to be especially phylogenetically informative (Gremigni & Falleni, 1991;Falleni et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

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Reinvestigation of vitellogenesis in Caryophyllaeus laticeps (Pallas, 1781) (Cestoda, Caryophyllidea, Caryophyllaeidae), monozoic tapeworm of Abramis brama (Pisces, Teleostei)

et al. 2013

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Reinvestigation of vitellogenesis in the caryophyllidean cestode Caryophyllaeus laticeps (Pallas, 1781) has been performed using light microscope (LM) and transmission electron microscopy (TEM), and cytochemical staining with periodic acid-thiosemicarbazide-silver proteinate (PA-TSC-SP) for glycogen. Vitellogenesis is generally similar to that reported in the past, however, some new observations were made. The present study reveals the first evidence of: (i) interstitial tissue in the vitelline follicles, (ii) lipid droplets in maturing and mature vitellocytes from vitelline follicles, and (iii) lamellar bodies in vitellocytes from the vitelloduct in C. laticeps. Projections of interstitial tissue surround each vitellocyte and the follicle periphery. The perinuclear cytoplasm of the interstitial tissue contains granular endoplasmic reticulum and vesicles of various size and density. Cytoplasmic osmiophobic lipid droplets and lamellar bodies, previously believed to be absent in most caryophyllid cestodes, are readily apparent in vitellocytes of C. laticeps. The origin and presumed function of these inclusions are discussed. On the other hand, the formation and storage of massive amounts of glycogen in the nucleus and large amounts in the cytoplasm of mature vitelline cells are similar to the condition found in other caryophyllids. Results are compared and contrasted with previous studies on vitellogenesis in other monopleuroid cestodes (Amphilinidea and Gyrocotylidea) as well as polypleuroid cestodes (Spathebothriidea) and the remaining strobilated Eucestoda.

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Section: Discussionsupporting

confidence: 59%

Section: Discussionmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

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Reinvestigation of vitellogenesis in Caryophyllaeus laticeps (Pallas, 1781) (Cestoda, Caryophyllidea, Caryophyllaeidae), monozoic tapeworm of Abramis brama (Pisces, Teleostei)

et al. 2013

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“…These bodies may be considered as a lysosome variation which has a heterogeneous structure. The interstitial system of some organs and tissues of tapeworms is presumably concerned with the transport of materials and the supply of energy for intercellular exchange (Gresson 1964, Conn 1993, OEwiderski and Xylander 2000. This is a well-known regulative function (mechanism of intracellular renewal) of lysosomes during morphogenesis and the differentiation of animal organs and tissues (Zavarzin and Charasova 1982).…”

Section: Ultrastructural Characteristics Of the Ovarian Components Inmentioning

confidence: 99%

Ultrastructure of the ovary, ovicapt and oviduct of the spathebothriidean tapeworm Didymobothrium rudolphii (Monticelli, 1890)

Poddubnaya

Gibson

Olson

2007

Acta Parasitologica

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The ultrastructural details are presented of the ovary, ovicapt and oviduct of the spathebothriidean tapeworm Didymobothrium rudolphii (Monticelli, 1890) from the intestine of the sand sole Solea lascaris. Oogonia, maturing oocytes and mature oocytes are surrounded by a syncytial interstitial cytoplasm, one of the distinctive traits of which is the presence of numerous myelinlike bodies. Oocyte inclusions comprise cortical granules and a small number of lipid droplets. The thickened, nucleated epithelium of the ovicapt lacks any apical structure and is a prolongation of the narrow ovarian epithelium. The muscular sphincter of the ovicapt is formed by a band of longitudinal muscles and bands of radial muscles at right angles to the longitudinal layer, and numerous myocytes surround the ovicapt wall. The oviduct of D. rudolphii is subdivided into three regions: (1) the proximal oviduct; (2) the fertilization chamber -the region distal to the point of entry of the duct from the seminal receptacle; and (3) the ovovitelline duct -the region distal to the point of entry of the duct from the vitelline reservoir. A comparative analysis is made between the structures of the ovary, ovicapt and oviduct of D. rudolphii and those of two other spathebothriideans, Cyathocephalus truncatus and Diplocotyle olrikii, with a discussion of ultrastructural traits that might be used as taxonomic criteria within the order Spathebothriidea.

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“…The vitellocytes of cestodes and trematodes play two important roles in their developmental biology: (1) production and secretion of proteins for eggshell or capsule formation (OEwiderski et al 1970;OEwiderski and Subilia 1978;OEwiderski andXylander 1998, 2000); (2) nourishment of the developing embryos with nutritive reserves stored in their cytoplasm Skóra Stefañski Vitellogenesis in trypanorhynch Parachristianella trygonis (OEwiderski andXylander 2000, OEwiderski and.…”

Section: Introductionmentioning

confidence: 99%

Ultrastructural and cytochemical studies on vitellogenesis in the trypanorhynch cestode Parachristianella trygonis Dollfus, 1946 (Eutetrarhynchidae)

Świderski¹,

Miquel

Neifar

et al. 2007

Acta Parasitologica

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During vitellogenesis in Parachristianella trygonis (Trypanorhyncha, Eutetrarhynchidae) we distinguished four stages: (1) gonial or stem cell stage; (2) early differentiation stage concentrated on protein synthetic activity and shell-globule formation; (3) advanced differentiation stage with main cell activity concentrated on carbohydrate synthesis (glycogenesis) and massive glycogen storage in the form of α-glycogen rosettes and β-glycogen particles; and finally (4) mature vitellocyte stage. Early vitellocyte maturation is characterised by: (1) an increase in cell volume; (2) extensive development of large, parallel cisternae of GER that produce proteinaceous granules; (3) development of Golgi complexes engaged in packaging this material; (4) continuous enlargement of proteinaceous granules within vacuoles and their transformation into shell-globule clusters composed of heterogeneous material. Cytochemical staining with periodic acid-thiosemicarbazide-silver proteinate for polysaccharides indicated a strongly positive reaction for the presence of α-glycogen rosettes and β-glycogen particles in the advanced stage of vitellocyte maturation. Both protein synthesis for shell-globule formation and carbohydrate synthesis or glycogenesis, important storage of nutritive reserves for the developing embryos, observed during cytodifferentiation of P. trygonis vitellocytes overlap in time to some extent. Mature vitelline cells are very rich in three types of cell inclusions accumulated in large amounts in their cytoplasm: (1) shell-globule clusters, playing an important role in egg-shell formation; (2) numerous large lipid droplets, as well as a high accumulation of lipid and α-glycogen rosettes and β-glycogen particles that undoubtedly represent important nutritive reserves for the developing embryos. Despite the fact that the type of vitellogenesis and ultrastructure of the mature vitellocyte in P. trygonis appears to differ to some extent from those of three other trypanorhynch species, its general pattern and ultrastructure greatly resembles those observed in other lower cestodes. Factors that may have contributed to the qualitative and quantitative variation in lipids during vitellogenesis among the four species of Trypanorhyncha, are identified and discussed.

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Vitellocytes and vitellogenesis in cestodes in relation to embryonic development, egg production and life cycle

Cited by 66 publications

References 28 publications

Reinvestigation of vitellogenesis in Caryophyllaeus laticeps (Pallas, 1781) (Cestoda, Caryophyllidea, Caryophyllaeidae), monozoic tapeworm of Abramis brama (Pisces, Teleostei)

Reinvestigation of vitellogenesis in Caryophyllaeus laticeps (Pallas, 1781) (Cestoda, Caryophyllidea, Caryophyllaeidae), monozoic tapeworm of Abramis brama (Pisces, Teleostei)

Ultrastructure of the ovary, ovicapt and oviduct of the spathebothriidean tapeworm Didymobothrium rudolphii (Monticelli, 1890)

Ultrastructural and cytochemical studies on vitellogenesis in the trypanorhynch cestode Parachristianella trygonis Dollfus, 1946 (Eutetrarhynchidae)

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