Multihormonal Control of Vitellogenesis in Lower Vertebrates

Polzonetti-Magni, A.M.; Mosconi, Gilberto; Soverchia, Laura; Kikuyama, Sakaé; Carnevali, Oliana

doi:10.1016/s0074-7696(04)39001-7

Cited by 105 publications

(52 citation statements)

References 183 publications

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“…Because changes in circulating levels of Vg reflect gonadal development, Vg has served as an ideal marker for detecting the onset of puberty and progression of maturation in female fishes in laboratory studies and in aquaculture and fisheries research (reviews: Specker and Sullivan, 1994;Patiño and Sullivan, 2002;Polzonetti-Magni et al, 2004).…”

Section: Detection and Quantification Methodologies For Fish Vitellogmentioning

confidence: 99%

“…These endocytosed vesicles fuse with lysosomes in the peripheral ooplasm, forming multivesicular bodies. The lysosomes contain the proteolytic enzyme cathepsin D, and possibly other enzymes (such as cathepsin B), that process Vg into its product yolk proteins (Carnevali et al, 1999;Hiramatsu et al, 2002c;Polzonetti-Magni et al, 2004;Romano et al, 2004).…”

Section: Vitellogenin and Vitellogenesismentioning

confidence: 99%

“…The second cleavage of Vg-derived yolk proteins occurs in oocytes of marine teleosts during FOM as described in the previous section, but this process is not typical of fish that spawn demersal eggs (termed benthophils). The second proteolysis is possibly mediated by several physiological events, including acidification of yolk and activation of lysosomal enzymes (reviews: Hiramatsu et al, 2002a;Matsubara et al, 2003;Polzonetti-Magni et al, 2004;Romano et al, 2004). The enzymes responsible for FOM-associated proteolysis have been identified in only a few species.…”

Section: Enzymes Involved In Proteolysis Of Vg-derived Yolk Proteinsmentioning

confidence: 99%

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Multiple piscine vitellogenins: biomarkers of fish exposure to estrogenic endocrine disruptors in aquatic environments

et al. 2006

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Section: Detection and Quantification Methodologies For Fish Vitellogmentioning

confidence: 99%

Section: Vitellogenin and Vitellogenesismentioning

confidence: 99%

Section: Enzymes Involved In Proteolysis Of Vg-derived Yolk Proteinsmentioning

confidence: 99%

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Multiple piscine vitellogenins: biomarkers of fish exposure to estrogenic endocrine disruptors in aquatic environments

et al. 2006

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“…However, in contrast to cortisol, E 2 also induced a drastic increase in plasma Vg concentrations, as well as in plasma calcium and phosphate concentrations. The increase in calcium and phosphate plasma concentrations under E 2 treatment reflects their involvement in the composition of Vg, which is a phospho-calcio-lipoprotein (for review: Polzonetti-Magni et al 2004). In the eel, the large increase in plasma Vg concentrations after E 2 treatment results from both the stimulation of Vg liver production and the very low Vg uptake by oocytes at the early silver stage (Burzawa-Gérard & Dumas-Vidal 1991).…”

Section: E 2 Action On Bone Demineralization: An Oviparous Featurementioning

confidence: 99%

Cortisol mobilizes mineral stores from vertebral skeleton in the European eel: an ancestral origin for glucocorticoid-induced osteoporosis?

Sbaihi

Rousseau

Baloche

et al. 2009

Journal of Endocrinology

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Endogenous excess cortisol and glucocorticoid (GC) therapy are a major cause of secondary osteoporosis in humans. Intense bone resorption can also be observed in other vertebrates such as migratory teleost fish at the time of reproductive migration and during fasting when large amounts of calcium and phosphate are required. Using a primitive teleost, the European eel, as a model, we investigated whether cortisol could play an ancestral role in the induction of vertebral skeleton demineralization. Different histological and histomorphometric methods were performed on vertebral samples of control and cortisoltreated eels. We demonstrated that cortisol induced a significant bone demineralization of eel vertebrae, as shown by significant decreases of the mineral ratio measured by incineration, and the degree of mineralization measured by quantitative microradiography of vertebral sections. Histology and image analysis of ultrathin microradiographs showed the induction by cortisol of different mechanisms of bone resorption, including periosteocytic osteolysis and osteoclastic resorption. Specificity of cortisol action was investigated by comparison with the effects of sex steroids. Whereas, testosterone had no effect, estradiol induced vertebral skeleton demineralization, an effect related to the stimulated synthesis of vitellogenin (Vg), an oviparous specific phospho-calciolipoprotein. By contrast, the cortisol demineralization effect was not related to any stimulation of Vg. This study demonstrates GC-induced bone demineralization in an adult non-mammalian vertebrate, which undergoes natural bone resorption during its life cycle. Our data suggest that the stimulatory action of cortisol on bone loss may represent an ancestral and conserved endocrine regulation in vertebrates.

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“…Corresponding editor: Patricio Dantagnan heterodimer molecules in the bloodstream of females (Polzonetti-Magni et al, 2004;Finn, 2007). In white perch (Morone americana) and other teleosts, these proteins have been found to be encoded by three types of Vtgs genes (VtgAa, VtgAb, and VtgC) (Kolarevic et al, 2008;Reading et al, 2011).…”

Section: __________________mentioning

confidence: 99%

Proteomic characterization of vitellogenins from three species of South American fresh water fish

Urdaneta

Camafeita

Poleo

et al. 2018

lajar

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ABSTRACT. Vitellogenins (Vtg) are glycolipophosphoproteins synthesized by oviparous vertebrates as yolk proteins precursors. These proteins have been studied for their role in reproduction and in endocrine disruption. In this work, we report the first proteomic study towards the characterization of Vtg from Pseudoplatystoma fasciatum, Piaractus brachypomus and Colossoma macropomum. Male specimens of each of the three fish species were estradiol-induced (experimental) and non-induced (control). The initial Vtg characterization was made by 2D protein gel electrophoresis of both groups The identification of the high molecular weight spots, presumed to be Vtgs, was assessed by MALDI-TOF mass spectrometry analysis. A post-translational modification study was performed by differential staining of 2D gels in order to visualize phosphoproteins and glycoproteins. Plasma samples from the three species, induced with estrogen, showed three high molecular weight spots with variable isoelectric points. Post-translational modifications showed that Vtgs from P. brachypomus and C. macropomum presented a phosphorylated and glycosylated subunit, while the same subunit in P. fasciatum was only glycosylated. This characterization will help in the development of reliable immunoassays, which could be used for studies of endocrine disruption or for the improvement of artificial spawning, by uncovering the time of fish maturation or sex determination.

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Multihormonal Control of Vitellogenesis in Lower Vertebrates

Cited by 105 publications

References 183 publications

Multiple piscine vitellogenins: biomarkers of fish exposure to estrogenic endocrine disruptors in aquatic environments

Multiple piscine vitellogenins: biomarkers of fish exposure to estrogenic endocrine disruptors in aquatic environments

Cortisol mobilizes mineral stores from vertebral skeleton in the European eel: an ancestral origin for glucocorticoid-induced osteoporosis?

Proteomic characterization of vitellogenins from three species of South American fresh water fish

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