Incorporation of Docosahexaenoic Fatty Acid into the Lipids of a Cestode of Marine Elasmobranchs

Dh, Beach; Iw, Sherman; Holz, George G.

doi:10.2307/3278858

Cited by 16 publications

(9 citation statements)

References 37 publications

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“…Since cestodes are incapable of de novo synthesis of non-volatile saturated and unsaturated fatty acids, biosynthesis of lipids depends on the host for the fatty acids (Buteau Jr., et al 1971, Nakagawa et al 1987. Because of this relationship, the fatty acid composition of cestodes is, therefore, similar to their immediate environment in the host (Beach et al 1975) and the origin of these fatty acids in the host comes through the host's food chain. Not only did the composition of total lipid of the trypanorhynch cestode Lacistorhynchus tenuis from two different hosts in California waters vary, but also the percentage of two lipid components in the same tapeworm from similar hosts in the Gulf of Mexico was markedly different (Buteau Jr., et al 1971).…”

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confidence: 99%

“…For the lipids, however, the work of Buteau Jr., et al (1971) and Beach et al (1975) on lipids of tetraphyllidean and trypanorhynch cestodes from sharks may offer some insight. Since cestodes are incapable of de novo synthesis of non-volatile saturated and unsaturated fatty acids, biosynthesis of lipids depends on the host for the fatty acids (Buteau Jr., et al 1971, Nakagawa et al 1987.…”

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confidence: 99%

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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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confidence: 99%

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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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“…unsaturated lipids are highly osmiophilic and appear black in the ultrathin sections, whereas saturated lipids are highly osmiophobic and appear white in these sections. The studies of Buteau et al [38] and Beach et al [39] on lipids of tetraphyllidean and trypanorhynch cestodes from sharks may offer some insights into the origin, metabolism and role of the lipids in these parasites. Since cestodes are incapable of de novo synthesis of non-volatile saturated and unsaturated fatty acids, the biosynthesis of lipids depends on the host for the fatty acids (38,40).…”

Section: Discussionmentioning

confidence: 99%

“…Since cestodes are incapable of de novo synthesis of non-volatile saturated and unsaturated fatty acids, the biosynthesis of lipids depends on the host for the fatty acids (38,40). The fatty acid composition of cestodes is, therefore, similar to that of their immediate environment in the host [39] and the origin of these fatty acids in the host is the host"s food chain. It can be concluded that the fatty acid patterns in all trypanorhynch lipids is host-related.…”

Section: Discussionmentioning

confidence: 99%

Ultrastructure of vitellogenesis and vitellocytes in the trypanorhynch cestode Aporhynchus menezesi, a parasite of the velvet belly lanternshark Etmopterus spinax

Świderski

Miquel

Marigo

et al. 2012

Comptes Rendus. Biologies

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“…Since cestodes are incapable of de novo synthesis of nonvolatile saturated and unsaturated fatty acids, the biosynthesis of lipids depends on the host for the fatty acids (Buteau et al 1971, Nakagawa et al 1987. Because of this relationship, the fatty acid composition of cestodes is quite similar to that in their immediate environment within the host (Beach et al 1975), and the host's fatty acids are derived from its food chain. Consequently, it can be concluded that the quantity of lipids in a parasite's tissues is generally host-related.…”

Section: Bothriocephalideamentioning

confidence: 94%

Ultrastructure and cytochemistry of vitellogenesis and the vitellocytes of the bothriocephalidean cestode Clestobothrium crassiceps (Rudolphi, 1819), a parasite of the teleost fish Merluccius merluccius (L., 1758) (Gadiformes, Merlucciidae)

Świderski¹,

Gibson

Marigo³

et al. 2011

Acta Parasitologica

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Ultrastructure and cytochemistry of vitellogenesis and the vitellocytes of the bothriocephalidean cestodeClestobothrium crassiceps (Rudolphi, 1819), a parasite of the teleost fish Merluccius merluccius (L., 1758) (Gadiformes, Merlucciidae) AbstractVitellogenesis and vitellocytes of the bothriocephalidean cestode Clestobothrium crassiceps (Rudolphi, 1819), a parasite of the teleost fish Merluccius merluccius (L., 1758), were studied by means of transmission electron microscopy (TEM) and cytochemistry. During vitellogenesis, four developmental stages were distinguished at the TEM level: (I) a stem cell stage of the gonial type; (II) an early differentiation stage, predominantly exhibiting lipid and protein synthetic activity; (III) an advanced differentiation or vitellocyte maturation stage, primarily exhibiting active glycogenesis still accompanied by an increase in lipid accumulation; and (IV) a mature vitellocyte stage. Vitellogenesis involves: (1) an increase in cell volume; (2) an extensive development of parallel, frequently concentrically arranged, cisternae of granular endoplasmic reticulum (GER) that produce dense, proteinaceous shell-gobules; (3) the development of Golgi complexes engaged in the packaging of this material; (4) an accelerated accumulation of unsaturated and saturated lipid droplets, along with their continuous enlargement and fusion; (5) the formation of individual β-glycogen particles and α-glycogen rosettes and their accumulation in the form of glycogen islands scattered among lipid droplets in the cytoplasm of maturing and mature vitellocytes; and (6) the rapid accumulation of large, saturated lipid droplets accompanied by dense accumulations of α-and β-glycogen along with proteinaceous shell-globules or shell-globule clusters in the peripheral layer during the advanced stage of vitellocyte maturation. Vitellogenesis in C. crassiceps generally resembles that previously described for three other bothriocephalideans, but differs from that of other cestode orders. Cytochemical staining with periodic acid-thiocarbazide-silver proteinate for glycogen indicates a strongly positive reaction for β-glycogen particles and α-glycogen rosettes, which form several large glycogen accumulations around the large, saturated lipid droplets of maturing and mature vitellocytes. Some hypotheses concerning the interrelationships between patterns of vitellogenesis, the possible modes of egg formation, embryonic development and life cycles in cestodes, and their phylogenetic implications are commented upon.

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Incorporation of Docosahexaenoic Fatty Acid into the Lipids of a Cestode of Marine Elasmobranchs

Cited by 16 publications

References 37 publications

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

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

Ultrastructure of vitellogenesis and vitellocytes in the trypanorhynch cestode Aporhynchus menezesi, a parasite of the velvet belly lanternshark Etmopterus spinax

Ultrastructure and cytochemistry of vitellogenesis and the vitellocytes of the bothriocephalidean cestode Clestobothrium crassiceps (Rudolphi, 1819), a parasite of the teleost fish Merluccius merluccius (L., 1758) (Gadiformes, Merlucciidae)

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