期刊
JOURNAL OF FISH BIOLOGY
卷 87, 期 1, 页码 17-27出版社
WILEY-BLACKWELL
DOI: 10.1111/jfb.12681
关键词
calcium-binding proteins; coronet cells; development; flatfish; proliferating cell nuclear antigen
资金
- Xunta de Galicia [08MMA011200PR]
- European Union [FP7/REGPOT-2012-2013.1, 316265]
The ontogenesis of the saccus vasculosus (SV) of turbot Scophthalmus maximus is described using histological and immunohistochemical methods to assess the general morphology, as well as the distribution of proliferative cells and several calcium-binding proteins (CaBP). The results reveal that the SV begins to differentiate on hatching, when immature coronet cells are morphologically distinguishable. Further morphogenesis involves the formation of a tubular avascular SV, which remains until premetamorphic larval stages. Folding and vascularization of the SV occurs mostly during metamorphosis, when S. maximus settle down on the bottom. Proliferative cells were placed within the SV itself and in the neighbouring infundibular hypothalamus. Their putative relationship with the growth of the SV is discussed. The CaBPs analysed are expressed in coronet cells. Parvalbumin is expressed in these cells from the beginning of their differentiation, while calretinin expression arises in the tubular SV and becomes more widespread over time. These data emphasize the importance of calcium buffering in the function of coronet cells.
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