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- W2153291294 abstract "Growth hormone (GH) excess causes an increment in the metabolic rate and in reactive oxygen species generation, which accelerate the ageing process in mammals. Considering that there is no information on this subject in fish, the aim of the present study was to evaluate the excess GH effect on senescence in a zebrafish (Danio rerio) transgenic model. In order to reach this objective, we analyzed the phenotype of spinal curvature and expression of genes related to the anti-oxidant defense system and myogenesis in muscle of 8 and 30 months old GH-transgenic males. Gene expression analyses revealed that both superoxide dismutase isoforms were down-regulated only in 30 months old animals, while glutamate cysteine ligase was down-regulated in GH-transgenic zebrafish. Acceleration of the spinal curvature and a reduction in the expression of miogenin at both ages and MyoD in the old fish were also observed. Although neurolipofuscin accumulation was not significant in GH-transgenic zebrafish, the estimation of maximum longevity based on the von Bertalanffy growth function was significantly lower in this group. The results obtained here indicate that GH overexpression reduces the transcription of anti-oxidant defense system and myogenesis-related genes, which probably accelerates senescence in the zebrafish transgenic model used." @default.
- W2153291294 created "2016-06-24" @default.
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- W2153291294 date "2010-06-01" @default.
- W2153291294 modified "2023-10-10" @default.
- W2153291294 title "GH overexpression modifies muscle expression of anti-oxidant enzymes and increases spinal curvature of old zebrafish" @default.
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- W2153291294 doi "https://doi.org/10.1016/j.exger.2010.03.012" @default.
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- W2153291294 hasPublicationYear "2010" @default.
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